MM-A0280HX - Micro-ondes TOSHIBA - Free user manual and instructions

USER MANUAL MM-A0280HX TOSHIBA

TOSHIBA Introduction

Please read these instructions carefully before starting the installation. This equipment should only be installed by suitably trained operatives.

In all cases ensure safe working practice: Observe precautions for persons in the vicinity of the works.

Ensure that all local, national and international regulations are satisfied.

Check that the electrical specifications of the unit meet the requirements of the site.

Carefully unpack the equipment, check for damage or shortages. Please report any damage immediately.

>E-E&&E These units comply with EC Directive: 73/23/EEC (Low Voltage Directive) and 89/336/EEC (Electro Magnetic Compatibility).

Accordingly, they are designated for use in commercial and industrial environments.

Avoid installation in the following locations:

Where the water drainage may cause a nuisance or a hazard when frozen. Where there is a danger of flammable gas leakage.

Where there are high concentrations of oil.

Where the atmosphere contains an excess of salt (as in coastal areas). Special maintenance is required to maintain product design life.

Where the airflow from the outdoor unit may cause annoyance. Where the operating noise of the outdoor unit may cause annoyance.

Where the foundation is not strong enough to fully withstand the weight of the outdoor unit.

EEE E&EEE Where strong winds may blow against the air inlet of the outdoor unit.

Precautions for R407C Systems

R407C outdoor units use synthetic oils which are extremely hygroscopic. Therefore ensure that the refrigerant system is NEVER exposed to air or any form of moisture.

Mineral oils are unsuitable for use in these units and may lead to premature system failure.

Use only equipment which is suitable for use with R407C. Never use equipment which has been used with R22.

R407C should only be charged from the service cylinder in the liquid phase. lt is advisable to use a gauge manifold set equipped with a liquid sight glass fitted in the centre (entry) port.

TOSHIBA Outdoor Temperature 5 — 43°C Cooling 15 — 21°C Heating Room Temperature 18 — 32°C Cooling 15 — 29°C Heating Room Humidity <80% Cooling 1. Allocation standard of Model name OUTDOOR MM-A0280HT 1 L 3 0280 - 28.0kW (1OHP) | [© Cooling | + È 0224-22.4kW (8HP) | | H_ Hocting| | y - pee cod + 0160 - 16.0kW (6HP) 7 Txec spee 3 © 2 INDOOR MM-TU056 1 L Æ B - Built-In Duct Type È C (CR)- Ceiling Type (IR Remote) 028 - 2.8kW (1HP) È K (KR) — High Wall Type (IR Remote) 042 — 4.2kW (1.5HP) © N _ Carcase Type 056 - 5.6kW (2HP) 3 se UP 080 - 8.0kW (3HP) 4 S (SR) — Low Wall Type (IR Remote) ne ) ! : 112 -11.2KW (4HP) Z SB — Built-In Slim Duct Type TU -2 Way Cassette Type 140 — 14.0kW (SHP) U - 4 Way Cassette Type 2. Range of combined units No. of combined units : 1 to 5 units Capacity range : Equivalent to 14HP (0384kW type) to 46HP (1288kW) 3. Restriction for combination units (1) The Inverter Unit should have the maximum capacity among all units in that combination. (2) The 6HP fixed-speed unit is available only with the combination of 14HP and 22HP (It cannot be used for any other combination.) 4. Rated conditions Cooling : Indoor air temperature 27°C DB/19°C WB Outdoor air temperature 35°C DB/25°C WB Heating : Indoor air temperature 21°C DB/15.5°C WB Outdoor air temperature 7°C DB/6° C WB 5. Mode Priority

This Outdoor Unit is set to operate with the Heating mode taking precidence. This precidence can be switched between Heat and Cool mode using the DIP switch 07 on the Outdoor Unit Interface PCB (MCC-1343-01) as follows:

s (Combination of Outdoor Units)

Transportation of the Outdoor Unit Installation of Outdoor Unit Dimensional Drawings Outdoor Unit Dimensional Drawings Two Units Connected Dimensional Drawings Three Units Connected Dimensional Drawings Four Units Connected

Dimensional Drawings Five Units Connected o Multiple Installation on the Rooftop

Piping Free Branching System Connecting Refrigerant Pipes Permissible Length/Height Separation of Refrigerant Piping 21 Selection of Refrigerant Piping and Charge Requirement 22 Branch Headers/Branch Joints (Accessories). Branch Header/T-shape Branch Joint Connecting the Branching Kit/Y-shape Branching Joint Heat Insulating the Branching Pipes/Branching Header

T-shape Branching Joint - to Connect Outdoor Units Installation of Gas/Liquid Branching Pipes

Airtight Test o o con c © © c'e c - CO c - VOOR - - 0 Leak Position Check/Air Purge Calculating the Additional Refrigerant Required

Additional Charge Amounts Wiring

General/Wiring System Overview

Connecting Power Source Cable/Control Cable Control Wiring Overview

TOSHIBA Installation

Transportation of the Outdoor Unit

+ Front Access — insert the forks into the slots on the fixing legs. + Side Access - see diagram.

+ Check the suitability of the lifting rope (see table). + Secure lifting rope through transportation slot. * Protect the unit where rope contact could scratch or deform it.

| L 7 Protection Model Weight

MM-A0280HT_ | 284.0kg MM-A0224HT_ | 282.0kg MM-A0280HX | 280.0kg MM-A0224HX | 278.0kg MM-A0160HX | 204.0kg

Transportation Slots

TOSHIBA Installation

Installation of Outdoor Unit

2 20mm 2 20mm 1. Align the outdoor units at intervals of 20mm or more. ! l S 1 f l Fix the outdoor units with M12 anchor bolts. : E Ë Ë : Ë : È Ë {4 positions per unit.) . © © © Anchor bolt with 20mm length is suitable. E] El

—— = ge Ë = 8 M12 anchor bolt, ——>— —* 4 positions per unit

+ Anchor bolt pitch is as shown in the following figure.

| | | CR er &— 15 x 20mm slot

+ However, the equivalent pipe length between the nearest outdoor unit and farthest outdoor unit of the refrigerating cycle system should not exceed 20m.

2. When routing the refrigerant piping through the base, the fixing height of the base {two-divided foundations) must be 500m or more.

IE D Refrigerant Piping

3. Correct foundation mounts for supporting the Outdoor unit:

Note: The leading outdoor unit to be connected to the main refrigerant piping for the indoor

units must be an inverter unit.

GB TOSHIBA Installation

Dimensional Drawings

Fiing bolt pitch 755 790 (including fixed leg)

Fixing bolt pitch E 700

Dimensional Drawings

Model Name: MM-A0384HT, MM-A0440HT, MM-A0504HT, MM-A0560HT

as 8-15 x 20 (Slot) l

G 4 |2e À RE ed à RER 2| £ à |$ a |3 a | à € 70( 704 Fixing Si pitch Fixing + pitch 990 990 0 2 gl : Ç 2C ) 2C 2C ) Ç )C ) Ç 2C )] 2C 2C )] e 2C 2 le 2 >] 2C 2C 2) e 2C 2 e le D] 2C 2C )] 83 ——— g (@] © 8 Éj 7 CL e 8 8 "

No. | Name @ | Outdoor Unit (Inverter type) @ _| Outdoor Unit (Fixed-speed type)

Note: All dimensions in (mm)

TOSHIBA Installation

Dimensional Drawings

Three Units Connected

Model Name: MM-A0608HT, MM-A0672HT, MM-A0728HT, MM-A0784HT, MM-A0840HT

TOSHIBA Installation

Dimensional Drawings

Four Units Connected

Model Name: MM-A0896HT, MM-A0952HT, MM-A1008HT, MM-A1064HT, MM-A1120HT

750 755 Fixing bolt pitch 790 including fixed leg)

700 700 700 700 Fixing bolt pitch_|_ 310 | Fixing bolt pitch | 310 | Fixing bolt pitch |_310 |_ Fixing bolt pitch 990 | 990 | 990 | 990

84! _] DC [e DC DC DC | © © © © : LT 7 EI 7 L 4020 ë, Si

Name Outdoor Unit [Inverter type)

Outdoor Unit (Fixed-speed type 1) Outdoor Unit (Fixed-speed type 2) Outdoor Unit (Fixed-speed type 3)

Note: All dimensions in (mm)

GB TOSHIBA Installation

Dimensional Drawings

Five Units Connected

Model Name: MM-A1176HT, MM-A1232HT, MM-A1288HT

= DUNE Fixing/QIt pitch | 310 | Fixing 0 pitch | 310 | Fixing/LQ pitch | 310 | Fixing RQ pitch| 310 | Fixing Pt pitch

990 | 990 | 990 | 990 Ïl 990

a 2 gd © (e) © © (eo) ET Ë ï al 5030 e % 5 Ë 8 4 8 ai L ! 8 210 À À | re] Z A 8 210 5 2 ol Z % 5 2 5050 5 ol L Name

Outdoor Unit [Inverter type)

Outdoor Unit (Fixed-speed type 1) Outdoor Unit (Fixed-speed type 2) Outdoor Unit (Fixed-speed type 3) Outdoor Unit (Fixed-speed type 4)

Note: All dimensions in (mm)

TOSHIBA Installation

Multiple Installation on the Rooftop

When the Outer Wall is Higher than the Outdoor Unit

If a hole can be made in the wall:

(Front side) 5 7 7) 24

1. Set an aperture ratio so that suction air volume

Vs from the hole becomes 1.5m/s or less. + 2. Height of discharge duct: HD = H-h. w

If a hole cannot be made: Hole in wall

1. Set a base with 500 to 1,000mm height. FT 2. Height of discharge duct: HD = H-h. Note: All dimensions in (mm) Base

TOSHIBA Installation

When the Outer Wall is Lower than the Outdoor Unit

e 8 8 | OI) … ns rm e 8 hi {Front side) S 210 220 220 >20 220 2 800

2-parallel lines installation

210 2>20 220 220 220

< 800 3-parallel lines installation e ES À A TE KDIOIOIOIO) = eo 88 n an (Front side) _ KORG = _ nr fon 8 d 8 N \] KOOIGIOT = 8 l 8 ront side) = Le > > < 800

— cn *When refrigerant piping is routed from the front juni of the unit, distance between Outdoor Unit and Connecting piping must be 500mm or more. 2 500 | 2500 Piping

Note: All dimensions in (mm) Connecting Piping

TOSHIBA Installation

Free Branching System

The following five branching systems are available to increase the flexibility of refrigerant piping design.

Line branching Branching joint system x Indoor units controller Header branching system Branching header ] TTIT Indoor units Remote controller! Header Outdoor units branching BI hing joi : system ranching joint Branching header after line branching Indoor units Ü Remote] controller Line Outdoor units branching system after header Branching header branchin ] [ s JTIT Header Branching ù branching joint system after Indoor header units : Remote branching controller

During installation — if the refrigerant gas leaks, ventilate the room. After installation — check for gas leakages. If refrigerant gas comes into contact With fire — noxious gas may result!

Connecting Refrigerant Pipes

1. To access the refrigerant piping connections and electrical wiring terminals, remove the 7xM5 securing bolts in the front panel. To remove the panel, lift it up and away from its hanging tabs - See diagram.

2. The refrigerant pipes can be routed forwards, downwards or sideways.

3. If the pipes are routed forwards, make sure they exit through the Piping/Wiring Panel — (remove knock out section) and allow at least 500mm between the Outdoor Unit and the main pipe connecting it to the Indoor Unit. This is for servicing access. (Replacing the compressor, for example, requires a space of at least 500mm.)

4. If the pipes are routed downwards, remove the knockout section in the baseplate of the Outdoor Unit. This will enable access. They can then be connected to the left or right, or the rear side. (Leading pipe of the balancing should be within 4m.)

1. When brazing, use nitrogen. This prevents internal oxidisation of the pipes.

2. Always use clean new pipe, and ensure it is not contaminated by water or dust.

nut — and tighten to the specified torque: (see table).

Note: All dimensions in (mm)

CG Pipes routed forward

Pipes routed downwards

d/_Ÿ Front panel N Piping/Wiring Panel

Valve at balance side (oil) / ] Valve at liquid side

Connecting pipe Tightening Re-fightening

TOSHIBA Installation

Permissible Length/Height Separation of Refrigerant Piping

Fixed-speed [TI Unit n <Ex 1> <Ex 2> CE Fred. Fied- Fixed- Fixed- Fixed- Fixed- Inverter speed speed Inverter speed speed Inverter speed speed Heïght Unit Unit] Unit? Unit Unitl Unit2 Unit Unitl Unit2 difference | Outdoor Connecing] 4 ng of been | Uni [I] [IL] (I) ouraor (| UND) VD (UD! UND! VI Outdoor @ gl (© ml [©] Unit gl) Li Lm œil Lol Lun Unis frshapebrandnglle [ie [ie ol Î Ï Ï = Ï H3< 4m Loint LA eh LE Main conneding piping behveen Outdoor Units| Vale for Valve for Length corresponded to farthest piping V4 additional Units x additional Units : between Outdoor Units LO£ 20m Main Note: In <Ex.2>, a large amount of refrigerant and oil may piping return to the Inverter Unit. Therefore, set the 1 T-shape joint so that oil does not enter directly. ui FT Branching piping 12 Branching header ] Connedting piping of Indoor Unit u7 1t branching section EE a b © d e height L Length ded to farth ne 125 diférence ngth corresponded to farihest piping L£ 125m Halght difference between Length corresponded to farthest piping after 1st branching L< 50m | between Indoor Outdoor Units Units H2< 30m HI< 50m Y-joint Indoor Unit | System Restrictions Notes: Combination of Outdoor Units: Inverter Unit + [ox No. of combined outdoor unis 5 units Fixed-speed Unit (0 to 4 units). Max. capacity of combined outdoor units _|128.8kW/46HP combination of Fred-spesd U s without Max. No. of connected indoor units 40 units nverter is not permissible. . Max. capacity of combined H2< 15 135% The Inverter Unit is the master Outdoor Unit : : D es “ indoor units H2>15 105% and is directly connected to the indoor

distribution pipe. Install the Outdoor Units in order of capacity. (Inverter Unit> Fixed-speed Unit 1> Fixed-speed Unit 2>Fixed-speed Unit n).

Alowable value Piping secion Total extension of pipe (Liquid pipe, real length} 250m LA + LB + La + lb + Le + Ld+ LI + 12 + 19 + + 15+l6+17+atbtetdte+f+g+h+iti 4 piping length L (e)LRSL length 100m LA + LB + Ld + LI + L3 + LA + L5 + L6 + j Piping Equivalent length 125m length |Equivalent lengih of farthest piping from 1st branching Li (‘) 50m LB +4+15+l6+i Equivalent lengih of farthest piping beween outdoor units LO (°] 20m LA + LB + Ld, LA + Ib LA +IB+ Le [Max equivalent lengih of outdoor unif connecting piping 10m Ld, Lo, Lb, Le Height betves Upper outdoor unit 50m — Height [and outdoor units H1 Lower outdoor unit 30m — difference|Height behween indoor unis H2 30m — Height belween outdoor units H3 Am —

*(d) is Outdoor Unit farthest from branching and (j) is Indoor Unit farthest from 1st branching.

GB TOSHIBA Installation

Selection of Refrigerant Piping and Charge Requirement

© Header Branching Pipe 1

LE Fixed-_ Fixed-_ Fixed- speed speed speed Inverter Indoor Unit connedting pipe Unitn Unit? Unitl Unit = = = (nn) Won) mn) MN] ouéoor um 9 ml mi ml ml DETTE TT Fe aiance pine © outdoor ol ol ol © The branchingioint| @ Y-shape branching ei @ Main piping joint @ connecting © © + piping

Main connecting piping between

Outdoor Units section connedting piping Indoor Unit () Pipe Size of Outdoor Unit KW | HP Model name Gas side Liquid side 16.0 | 6 MM-A0160HX 2222 @9.5 224 | 8 MM-A0224HT, MM-A0224HX 2222 212.7 28.0 | 10 MM-A0280HT, MM-A0280HX 228.6 212.7 O)] Connecting Pipe Size Between Outdoor Units Total capacity code of outdoor| Gas side | Liquid side | Balance pipe Below 16 228.6 215.9 @9.5 16 to Below 20 934.9 215.9 29.5 20 to Below 26 41.3 219.0 @9.5 26 to Below 32 41.3 @22.2 @9.5 32 or more @54.1 222.2 29.5 @) Size of Main Pipe Total capacity code of all outdoor units | Gas side | Liquid side Below 10 @22.2 212.7 10 to Below 14 228.6 212.7 14 to Below 20 934.9 215.9 20 to Below 26 41.3 219.0 26 to Below 32 41.3 222.2 32 or more @54.1 222.2 @) Size Between Branching Sections Total capacity code of indoor units | Gas side | Liquid side downstream (*1) q Below 4.0 215.9 29.5 4.0 to Below 6.4 219.0 29.5 6.4 to Below 13.2 222.2 212.7 13.2 to Below 19.2 234.9 215.9 19.2 to Below 25.2 41.3 219.0 25.2 to Below 31.2 41.3 219.0 31.2 or more Q54.1 2222

Note: All dimensions in (mm)

TOSHIBA Installation

O)] Piping of Indoor Unit

Unit Gas side (‘4) | Liquid side 028 type to 056 type CIE 64 080 type 2159 D95 112 type to 140 type 219.0 D 95

ie. MM-SB028 = Gas 212.7, Liquid G6.4

@) Branching joints/headers

Model name Usage Appearance RBM-YO18 | Indoor unit capacity code (*1): Total below 6.4 Y-shape RBM-Y037 | Indoor unit capacity code (*1): Total 6.4 or more and below 13.2 (*2) branching joint RBM-YO71 _ | Indoor unit capacity code (‘1}: Total 13.2 or more and below 25.2 (‘2) = RBM-Y129 | Indoor unit capacity code (*1): Total 25.2 or more (2) 4-branching header (3) RBM-H4037 | Indoor unit capacity code {*1): Total below 13.2 Max. 4 RBM-H4071 | Indoor unit capacity code (*1): Total 13.2 or more and below 25.2 | branches 8-branching header [*3) | RBM-H8037 | Indoor unit capacity code [*1}: Total below 13.2 Max. 8 RBM-H8071 | Indoor unit capacity code (*1): Total 13.2 or more and below 25.2 | branches

1 set of 3 types of T-shape joint pipes as described below: The required quantity is arranged and they are combined at the site.

shape branching joint Connecing pi Corresponding dia. (mm) re! {For connection of RBM-T129 San 9 PPe Pc . _ (mm) 2» outdoor unif) alancing pipe 9. Piping at liquid side D12.7 to 222.2 1 Piping at gas side 222.2 to 54.1 1

D Additional Refrigerant Amount

Liquid pipe size | Additional refrigerant amount for liquid pipe 1m {kg) D6.4 0.030 295 0.065 912.7 0.115 215.9 0.190 S19.0 0.290 G222 0.420

(*1) Code is determined according to the capacity code of the Indoor Units connected. For details, refer to the Introduction section in this manual.

(*2) lfthe total capacity code value of Indoor Units exceeds that of Outdoor Units, apply the capacity code of Outdoor Units.

(*3) When using a branch header, Indoor Units with a maximum of 6.0 capacity code in total can be connected to each branch.

(*4) Ifthe length of the gas pipe exceeds 30m from the 1st branching to an Indoor Unit, increase the Gas pipe section by 1 size, i.e. MM-U140 = Gas 222.2, Liquid 29.5.

Note: All dimensions in (mm)

TOSHIBA Installation

Branch Headers/Branch Joints (Accessories)

Y-shape Branch Joint

RBM-Y018 RBM-Y037 [Gas side] [Gas side]

ous on: Note: o15 This additional connecting pipe is used if the - gas pipe size is S41.3 or less. When brazing, - the minimum insertion margin is 15mm.

TOSHIBA Installation

Note: Pipe dia. shown indicates dia. of pipe to be connected.

[Liquid side] [Liquid side] T-shape Branch Joint RBM-T129 [Gos side] oui a on os os one Ouiside os diameter _ouo ral HBdaed [Liquid side] oo as one “7 on: que, Outside @222 diameter 0159 3 pieces À 2 pieces included included [Balance side] œe

Note: All dimensions in (mm)

GB TOSHIBA Installation

Connecting the Branching Kit

Y-shape Branching Joint

Y-shape Branching Joint for gas and liquid distribution

To other Branching Pipe or Indoor Unit

Piping at site inlet Piping at site

Y-shape branching joint for gas side/liquid distribution

When the selected pipe size differs from the size of the y-shape branching joint pipe, cut the centre of the connecting section with a pipe cutter, as shown below.

+ Use the attached auxiliary pipe to adjust the pipe dia. of the Y-shape branching joint at gas or liquid side (RBM-YO71, RBM-Y129). Cut the branched pipe and auxiliary pipe to the specified size, and

then braze. 41.3 22.2 234.9 241.3 934.9 219.0 N Auxiliary pipe at gas side 212.7 222.2 215.9 219.0

Note: All dimensions in (mm)

Y-shape Joint for gas and liquid distribution

+ Install Y-shape branching joint so that it branches horizontally or vertically.

+ Be sure to fit the insulation to the Y-shape branching joint supplied in the kit.

NA Cut at the centre

Cut the pipe at the centre of each connecting section, and remove burr.

TOSHIBA Installation

Heat Insulating the Branching Pipes

Ensure the pipe insulation covers the piping up to the brazed accessory joints, as this will eliminate ingress of water — tape the pipe insulation to a thickness of 10mm or more, as shown.

RBM-Y129 (Gas side) (Prepared at site) RBM-Y071 (Gas side, Liquid side), RBM-Y129 (Liquid side)

urethane foaming ect insulating

agent, etc. Seal with Pipe heat vinyl tape insulator \, Cut by approx. CAT . Cut by Heat insulating” Bag them face 2PPrOX. 90°

pipe for piping to face

Use insulator with a heat resistance of 120° C or over for gas pipes. To insulate the Branching Pipes, use a T-Shaped Joint cover with a thickness of 10mm or over -— or a machined insulation portion, as shown.

Place them edge to edge … Place them edge to edge

Pipe heat insulator | Heat insulator pe heat prepared at site | included accessor/_ insulator \ \ repared at site

150 | x Branching Pipe Place them

Heat insulator (prepared at site), edge to edge

+ After the heat insulating, tape to seal.

Taping _-@ (prepared atsite) Heat insulator 7 (prepared Heat insulator at site)

Gas side Prepared at site

To Outdoor Unit Liquid branching header

When the selected pipe size prepared at site differs from the size of the branching header pipe, cut the centre of the connecting section with a pipe cutter

If the number of Indoor Units to be connected is less than the number of connections on the Branching Header, braze a pipe cap to the unused connectors.

+_Install the branching header so that it branches horizontally. DO NOT install vertically.

(B view) Liquid side

+ Be sure to insulate the branching header with the insulation provided.

+ When routing the branching header at the liquid side from the opposite side, cut both ends and use a pipe cap (not supplied), as shown.

& ® © TE) Cut Cut Cut + 7 Y (es! 5 Eu 1 TC Pipe cap Notes:

+ Support of branching header Set a hanging metal support (prepared at site) for the branching header, after fitting

Cut the centre of each connecting section, and remove burr.

Use a mini-cutter to cut branching headers up to 22.2.

1. Make sure there's a straight run of pipe at least 300mm long at the inlet side of Y-shaped Branching Joints and Branching Headers. 2. Install Y-shaped Branching Joint so they branch horizontally or vertically. In horizontal

installations, set within + 30°.

or name to each pipe.

Note: All dimensions in (mm)

. Install Branching Headers so they branch horizontally. . Do not use T-shaped Branching Joints for Branching Sections. . When using Y-Branches or Header Branches to prevent incorrect piping, attach a line number

TOSHIBA Installation

T-shape Branching Joint - to Connect Outdoor Units Branching Pipes at Gas Side/Liquid Side

Pipe prepared at site To Outdoor Unit

Connecting pipe at To other Branching gas/liquid side N 222 Pipe or Outdoor Unit

Pipe arranged at site Connecting pipe at gas/liquid side To other Branching

© t Branching Pipe at gas/liquid side Pipe or Branching Section of main pipe Ne Connecting pipe at gas/liquid side

Pipe arranged at site

+ Use the included connecting pipes for gas/liquid sides to match to the appropriate pipe size. (The diagram shows a connecting example.)

To other Branching To other Pipe or Branching Branching Pipe Section of main pipe or Outdoor Unit

+ Cutting position of connecting pipe

When the selected pipe size prepared at site differs from the size of the Branching Pipe, cut the centre of the connecting section with a pipe cutter.

GB TOSHIBA Installation

Installation of Gas/Liquid Branching Pipes

Inverter Fixed-speed Inverter Fixed-speed Outdoor Unit Outdoor Unit Outdoor Unit Outdoor Unit L 2 _ =, =] =] [S] [em] Fe] © o di mi — ï 1 d il ee, Eu INCORRECT | D, D, ROUTING Balancing Branch Pipes (Oil) To Quidoor Pipe prepared When Inverter Fixed-speed ni at site combining two Outdoor Unit Outdoor Unit | ï 7 other units, connect | 77° Branching Pipe directly - = ï . RE 7 Outdoor Unit Ë E E = = . \ © © » Pipe prepared da d To other at site Connect Branching Pipe Bronching Pipe f Balancing Outdoor Unit. ranching Pipe for Hu 91 Outdoor tnt \ Balancing Pipe (included) Pipe directly Pipe prepared at site

Insulate liquid side, gas side and Balancing Pipes separately.

Use insulator with a resistance of 120°C + for gas pipes.

To insulate the Branching Pipes, use a T-Shaped Joint cover with a thickness of 10mm or over — or the machined one included. (Insulation for branching is not included.)

To prevent condensation or dripping — seal the Branching Pipe securely, with no gaps.

Heat insulating pipe for pipin: 3 PIRE FOr PIPIRG Seal the joint with urethane

Seal with vinyl tape tros un Heat insulating pipe for piping

External dia. of Branching Pipe

Drill a hole with dia. larger than external dia. of heat insulating pipe for piping

TOSHIBA Installation

Carry out an airtight test after the refrigerant piping is complete. For an airtight test, connect a nitrogen gas bottle as shown, and apply pressure.

Be sure to carry out the test from the service ports of the packed valves at both the gas side and balance side.

Complete the airtight test on the service ports at liquid, gas and balance sides of the Inverter Outdoor Unit ONLY.

Keep all of the valves at gas, liquid and balance sides fully closed. Nitrogen may enter the cycle of the Outdoor Unit. Therefore, re-tighten the valve rod before applying pressure. (For all valves at gas, liquid and balance sides.)

For each refrigerant line, apply pressure gradually at gas, liquid and balance sides.

Be sure to apply pressure at gas, liquid and balance sides. Never use oxygen, or a flammable noxious gas.

Low- High- Connected to Indoor Unit pressure pressure gauge gauge

Packed valve fully closed (Gas side)

Main pipe Detailed drawing of packed valve

Service port at liquid side

Packed valve at liquid side

Packed valve at gas side To main unit

Packed valve fully Ni itrogen

closed (liquid side)

unit [connectis Service port at balance side Pos Po at site Packed valve at at site

balance side 2 To main

U Connected to other fixed-speed Outdoor Unit

To detect a large leakage STEP 1: 0.3MPa (3.0kg/cm°G) Apply pressure for 3 minutes or more STEP 2: 1.5MPa (15kg/cm’G) Apply pressure for 3 minutes or more

To detect a fine leakage STEP 3: 3.0MPa (30kg/cm’G) Apply pressure for 24 hours

+ Check for a reduction in pressure.

If there is no reduction in pressure this is acceptable.

If there is a reduction in pressure check for leakage.

(Note: If there is a difference of ambient temp. between when the pressure was applied and 24 hours later, then pressure could change by approx. 0.01MPa (0.1kg/cm’G) - so correct the pressure change.)

Note: All dimensions in (mm)

TOSHIBA Installation

If a pressure drop is detected, check for leakage at connecting points. Locate the leakage by listening, feeling, using foaming agent etc. - then re-braze or re-tighten.

Air Purge Using a vacuum pump, complete an air purge. Never use refrigerant gas.

+ After the airtight test, discharge the nitrogen gas.

+ Connect a gauge manifold to the service port at liquid side, gas side and balance side, and connect a vacuum pump as shown.

+ Be sure to vacuum at liquid, gas and balance sides.

Low- High- pressure pressure gauge _gauge

Connected to Indoor Unit

Packed valve fully closed (Gas side)

Detailed drawing of packed valve L)

ras À at gas side . | L Packed valve care col & ervice port +1 gs side a] À at liquid side j … \ Service port Guide To main Packed valve fully at liquid side ï unit closed (liquid side) To main unit ï f Service port at balance side Ping vvi, at site Packed valve at at site balance side K + To main unit

Packed valve fully | closed (balance side)

+ Use a vacuum pump with high vacuum carry-over degree (0.750mmHg or less) and large displacement (40L/min. or more).

+ Perform vacuuming for 2 or 3 hours, though time depends on pipe length. Confirm that all packed valves at liquid, gas and balance sides are fully closed.

+ If vacuum does not reach 0.750mmHg or less even after pumping for 2 hours or more, carry on for another hour. If it is still not reached even after 3 hours, check for leaks.

+ When vacuum has reached 0.750mmHg or less after 2 hours or more, fully close valves VL and VH on the gauge manifold, stop the vacuum pump, leave for 1 hour, and then confirm the vacuum reading has not changed. If it has, there may be a leak — so carry out a full piping check.

+ After the procedure has been completed, replace the vacuum pump with a refrigerant bottle and add the refrigerant.

TOSHIBA Installation

Adding the Refrigerant

After the airtight test, replace the vacuum pump with a refrigerant bottle to charge the system.

Calculating the Additional Refrigerant Required

The refrigerant amount at shipment does not include the refrigerant needed for the piping - so first calculate this amount, and then add it.

Refrigerant charge amount shipped from the factory

Outdoor Unit Model name MM- | AO224HT A0280HT A0160HX | AO0224HX | A0280HX Charging amount (kg) 15.5 17.0 5.0 7.0 9.0

The amount of additional refrigerant is calculated from the size of the liquid pipe, and its real length.

Additional refrigerant charge amount at site = Real length of liquid pipe x Additional refrigerant charge amount per liquid pipe 1m.

Additional charge amount R (kg) = (L1 x 0.030kg/m) + (L2 x 0.065kg/m)+ (L3 x 0.115kg/m) L1: Real total length of liquid pipe S6.4 (m) L2: Real total length of liquid pipe 29.5 (m) L3: Real total length of liquid pipe 212.7 (m)

Pipe dia. at liquid side Additional refrigerant amount/1m D6.4 0.030kg 29.5 0.065kg @12.7 0.115kg 215.9 0.190kg @19.0 0.290kg 222.2 0.420kg

Keeping the Outdoor Unit valve closed, charge the refrigerant from the service port on the liquid side.

If the specified amount of refrigerant cannot be charged - fully open the Outdoor Unit's valves on the liquid, gas and balance sides, then perform the cooling operation with the valve at the gas side slightly closed.

If leaks cause a shortage of refrigerant - recover the refrigerant from the system, and recharge with new refrigerant to the total refrigerant charge.

Note: All dimensions in (mm)

TOSHIBA Installation

Additional Charge Amounts

The circuit protection device will protect the supply cable against over current. The circuit À protection must be selected having due regard to the compressor starting current, such that the supply cables when sized correctly, are protected.

The cable should be selected to match the nominal load of the system, in addition to the losses associated with corrections for length, temperature, impedance etc., in accordance with local codes of practice.

Observe the Electrical Equipment Engineering Standard and Indoor Wiring Regulations.

The refrigerant piping and corresponding control wiring should be routed closely together.

For the control wires connecting the Indoor Units, Outdoor Units, and between indoor and Outdoor Units, the use of double-core shielded wires is recommended to prevent interference. Provide each Indoor Unit with a separate method of isolation.

Supply power to each Outdoor Unit via a dedicated branch circuit, and provide a circuit breaker for each Outdoor Unit.

Connect the power supply cables to the Outdoor Unit via the built in isolator.

Note: Provide separate power supplies for indoor and Outdoor Units.

Wiring System Overview

Outdoor power source

Single phase 220/230/240V Circuit breaker power switch

Table below shows the supply requirements

MODEL STARTING CURRENT (A) RUNNING CURRENT (A) POWER COMSUMPTION (KW) MM-A0280HT 60 19.7 12.6 MM-A0224HT 60 162 102 MM-A0280HX 60 21.8 12.8 MM-A0224HX 60 18.7 10.6 MM-A01 60HX 60 10.6 5.9

Note: The above data is based on the following conditions:

Indoor Temperature: 27°C DB/19°C WB Outdoor Temperature: 35°C DB/25°C WB Connecting the Power Source Cable and Control Cable

Insert power source cable and control cable after removing the knockout in the Piping/Wiring Panel on the front side of the main unit.

Knock out (x4) for control cable and power source cables.

+ Connect the electric cables and earth wire to the Outdoor isolator terminal block through a notched section at side of the electric parts box, and fix with a clamp.

+ Bundle the electric cables using the hole so that they are in the notched section of the electric parts box.

+ Connect the control cable between Indoor and Outdoor Units plus the control cable between Outdoor Units to P-Q terminal section through a hole at the side of the electric parts box, and fix with a clamp.

+ Use control cable with 2-core shield wire (1.25mm° or more) in order to prevent interference. (Non-polarity.)

Electric parts box Notes: | Power Supply

1 Be sure to separate the power source Connections cables and each control cable.

2 Arrange the power source cables and each control cable so they are not in Earth Screw contact with the bottom surface of the , main unit. F

3 A terminal block (X-Y) for connecting the optional Central Remote Controller is provided on the Inverter Unit.

XY terminal block {For Central Remote Controller)

{For wiring for control cable between Indoor/Outdoor Unit For wiring for control cable between Outdoor Units)

Earth L Central Remote Controller (Option) *RBC-CR64-PE (For Line 64)

Transmission wire for control

Shield wire must be connected

between Outdoor Units to each Outdoor Unit Transmission wire for control between Outdoor Unit and Shield wire must be connected to

Remote Controller Wire specification, quantity, size of crossover wire (transmission wire) and Remote Controller wire. Name ty Size Specification Crossover wire (between indoor and 3 outdoor units, between outdoor units) 2 cores 1:25mm° < 500m Remote controller wiring 3 cores | 0.3mm < 200m, 200m < 0.75mm < 500m Shielded wire Central control remote controller transmission wire 2 cores |1.25mm < 500m, 500m < 2.0mm < 1000m

1. Crossover lines and lines from the central Remote Controller use double-core non-polar wires. Use double-core shielded wires to prevent interference. Connect the ends of shielded wires and insulate the final end. Provide two ground points: one at the central Remote Controller and the other for the Outdoor Units.

2. Use 3-core and polar wire for Remote Controller (A, B, C terminals).

Use 2-core wire for grouping wiring of Remote Controller (B,C terminals).

3. Be sure to divide the earth shield wires of the central Remote Controller and crossover into

the separate lines (not crossed halfway).

TOSHIBA Trial Operation

Contents Final Installation Checks 39 Adiustment Before Trial Operation 39 Service Support Functions 40

Check Function for Connection of Refrigerant Pipes and Control Transmission Lines +... +. Hesie ee ne Function to Start/Stop Indoor Units From an Outdoor Unit

Trial Cooling Operation Function ne... Ô Collective Start/Stop (On/Off) Function 0 0 OO o o © CRD d Individual Start/Stop (On/Off) Function à 0 OMBc 0 © oO Alarm Clear Function © © ot o Clearing a Central Remote Controller/with 7 day Timer 45 Clearing the Interface PCB of an Inverter Outdoor Unit . Clearing an Alarm by Resetting the Power Source Remote Controller Identification Function co o Minc - + 0660 : Forcing the Electronic Control Valve (PMV)

“Fully Open’- on the Indoor Unit © o JA 0 D - CCE. 47

Forcing the Electronic Control Valve (PMV) “Fully Opened/Fully Closed” - on the Outdoor Unit 47

TOSHIBA Trial Operation

PN Ensure that the electrical cable used for power supply and control of the system is unable to come into contact with either service valves or pipework which are not insulated.

When installation is complete, check that all power supply and interconnecting wiring has been appropriately protected.

PIN When refrigerant and drain piping have been completed, ensure that all pipework is fully insulated and apply finishing tape to seal the insulation.

Automatic Address Between Indoor and Outdoor Units

Turning on the power for the first time after the system has been installed starts the Automatic Address procedure. lt usually takes between 3 and 5 minutes to complete — but in some cases, can take up to 20 minutes.

During Automatic Address the System cannot be Operated

If the Operate button on the indoor unit is pressed during Automatic Address, the following will happen:

1. The operation light on the remote control will come on;

2. The fan on the Indoor Unit will start or stop, according to the mode;

3. Cool air will not come out, because the Outdoor Unit is off.

When Automatic Address procedure is complete, normal operation starts automatically.

Automatic Address Reactivation

Once control of the Indoor Unit has been confirmed, Automatic Address will only be reactivated when:

+_the PC board of the Indoor Unit is replaced, and power is turned on for the first time. + a new Indoor Unit is added, and power is turned on for the first time.

TOSHIBA Trial Operation

Check Function for Connection of Refrigerant Pipes and Control Transmission Lines

This function is provided to check misconnection of the refrigerant piping and the control transmission line between Indoor and Outdoor Units by the switches on the interface PCB of the Inverter Outdoor Unit.

However, be sure to check items described here before implementing this check function.

+ When grouping operation of the Remote Controller is performed and the connected Outdoor Units are used, the check function does not work.

+ Only use this facility to check lines one by one in a single Outdoor Unit. Checking multiple lines at the same time may cause faulty readings.

( Power ON } Both outdoor/Indoor Unit sides

System capacity check When setting SWO1 on the 1/F PCB of the Inverter : Outdoor Unit to "1", SWO2 to "3", and SWO3 to "3, the ë number of the Outdoor Units (including Inverter Unit) connected to the system is displayed on the 7-segment LED (A). Check that this display agrees with the expected | number of Outdoor Units.

EEEA Checking the number of Indoor Units SWO1, 02, 03: Rotary switch When setting SWO1 on the interface PCB of the Inverter SWO4, 05: Push switch Outdoor Unit to "1", SWO2 to "4", and SWO3 to "3", the SWO8: Dip switch

number of Indoor Units connected to the system is displayed on 7-segment LED (A). Check that this display

is consistent with the expected number of Indoor Units. 9 #

È 18] Set the switch on the interface PCB of the Inverter $ Outdoor Unit to the following values. Ê

SWO1 to "2", SWO2 to "1", SWO3 to "1": Cooling 7 adore to # operation. pe

Push the push-switch SWO4 on the interface PCB of the

Inverter Outdoor Unit for 2 seconds or more. Check that It takes 15 minutes for 1 system check. the display of the 7-segment LED (B) is "CC" for the cooling operation. : . :

“1 Besides the miswired Unit(s), the number of Units displayed on the 7-segment LED includes the Indoor

After 15 minutes, check 7-segment LED (B) for the Units sending a check code. Verify the number of Indoor Units miswired. miswired Unit(s) using the check code. (°00" is displayed if there is no applicable unit.) Then, set SWOT to "5" and SWO2 and SW03 to the “2 address of each unit (*2) to view the check code. : : When the switch setting has matched the address of swoz | swos | Address of indoor unit the has matché isplayed on the miswired Indoor Unit, "9A' is displayed on the 7-segment LED (B). 7 segment LED [A] Tiolé) 1 Tio 16

After check, return display select switches SWO1, SWO2 1 to 16 3 33 to 40

and SWO3 on the interface PCB of the Inverter Outdoor Unit to "1". NX Completion

TOSHIBA Trial Operation

Function to Start/Stop Indoor Units From an Outdoor Unit

No.| Function Outline Clear Setup (1) | Trial cooling | The modes of all the connected indoor [Setup] operation units are collectively changed to trial Push SWO4 for at least 2 seconds under cooling operation modes. condition of SWO1 “2”, SWO2 "5". NOTE: [Clear] Control operation as same as that of Cleared from the remote controller when normal trial operation from the remote SWO1 and SWO2 are changed to other controller is performed. positions. (2) | Collective All the connected indoor units are operated | [Setup] operation collectively. Push SWO4 for at least 2 seconds under NOTE: condition of SWO1 “2”, SWO2 “7”. Operation contents follow to the setup on [Clear] the remote controller. Cleared from the remote controller. Collective All the connected indoor units are stopped | [Setup] stop collectively. Push SWO05 for at least 2 seconds under condition of SWO1 “2”, SWO2 “7”. [Clear] Cleared from the remote controller. (8) | Individual The specified indoor unit is operated. [Setup] operation NOTE: To start an indoor unit, set “16 in SWO1 and Operation contents follow to the setup on the address number of the indoor unit the remote controller. {1 to 20) in SWO2 and SWO7, and then push Other indoor units stay as they are. SWO4 for at least 2 seconds. [Clear] Cleared from the remote controller. Individual The specified indoor unit is stopped. [Setup] stop NOTE: Push SWO5 for at least 5 seconds. Other indoor units stay as they are. [Clear] Cleared from the remote controller. Note:

This start/stop function only sends mode signals for starting, stopping, operation, etc., from the Outdoor Unit to the Indoor Unit(s). If the Indoor Unit did not follow the sent signal, there is no function to re-send the signal and force the Unit to follow the command.

GB TOSHIBA Trial Operation

Trial Cooling Operation Function

This function changes the modes of all the Indoor Units to trial operation modes. It is operated by the switch on the interface PCB of the Inverter Outdoor Unit.

Set SWOT on the interface PCB of the Inverter Outdoor Unit to "2", SWO2 to "5", and SWO3 to "1".

SWO1, 02, 03: Rotary switch SWO4, 05: Push switch SWO8: Dip switch

Push the switch SWO4 on the PCB of the Inverter Outdoor Unit for 2 seconds and more.

Check that the mode on the Remote Controller of the Indoor Unit is Trial Cooling.

(Lis displayed.) —————- Operation check Check that "-C" is displayed on the 7-segment LED (B) of the interface PCB of the Inverter Outdoor Unit.

Return SWOI to "1", SWO2 to "1", and SWO3 to "l'on let î D the interface PCB of the Inverter Outdoor Unit. Stop/Completion

TOSHIBA Trial Operation

Collective Start/Stop (On/Off) Function

This function starts/stops all the Indoor Units by the switch on interface PCB of the Inverter Outdoor Unit.

H an alarm has been already displayed as SWo1 "1, SWO2 "2", SWO3 "1", return the status to Normal (see Troubleshooting), and then execute a trial operation.

Set the operation mode of the Remote Controller. {If Setup is not executed, operation is performed under the present mode.) (FAN, COOL, HEAT)

ERES Set SWO1 to "2", SWO2 to "7", and SWO3 to "l'on interface PCB of the Inverter Outdoor Unit. SWO1, 02, 03: Rotary switch

SWO04, 05: Push switch SWO8: Dip switch

Push the switch SWO4 for 2 seconds or more on interface PCB of the Inverter Outdoor Unit.

L——————————— Operation

(When he discharge temp. does not change, À even if COOL/HEAT is set on the Remote

Controller, then miswiring is likely.)

Indoor Units operate.

Push the push-switch SWO05 for 2 seconds or more on interface PCB of the Inverter Outdoor Unit. > Stop

After trial operation, return the display select switches . SW01, SWO2, and SWO3 to "1". ———— Completion

GB TOSHIBA Trial Operation

Individual Start/Stop (On/Off) Function

This function starts/stops the Indoor Units individually by the switch on the interface PC board

of the Inverter Outdoor Unit.

Set SWOI to "16", and SWO2 and SWO03 to the Indoor Unit to be operated. (See table.) The

nominated Units will now operate.

{If the rotary switch of a nominated unit is set at anything from 2 to 16, it cannot start or stop

individually. " is displayed on LED ‘B'.)

Power ON When an alarm has been already displayed with setting of SWOT to "1", SWO2 to "1", and SW03 to "1", return the status to Normal (see Troubleshooting) and then perform the Trial Operation.

Set the operation mode on the Remote Controller. {If not set, operation continues under the present mode.) (FAN, COOL, HEAT)

The Trial Operation is not performed for ———- Indoor Units with group operation on the Remote Controller.

Match the display on the interface PCB of the Inverter Outdoor Unit in the following table.

SWO1, 02, 03: Rotary switch SWO4, 05: Push switch

Push switch SWO4 Unit for 2 seconds or more.

The Indoor Unit starts operation.

{IF the temperature of discharged air does not change, even if Cool mode is set on the

Remote Controller, miswiring is likely.)

To be started/stopped individually

Push switch SWO5 for 2 seconds or more.

After rial operation, retum SWOI, SWO2, and SWO3 to "1".

SwWo1 | SWO2 | SWO3 To be operated 16 1-16 1 From address 1 to address 16 individually 16 |1—-16| 2 From address 17 to address 32 individually 16 |1-8 3 From address 33 to address 40 individually

TOSHIBA Trial Operation

Alarm Clear Function

Clearing a Central Remote Controller/with 7 day Timer

This clears the alarm so that the Outdoor Unit can resume operation without having to reset power.

» mr fé ET © © © Fee o © ge | Lorren Eu &O Oo

+ Push the ‘CHECK’ button on the remote control panel for at least 5 seconds. + To clear the check code for that Remote Controller — push the ‘CHECK’ button for at least

15 seconds. (Using the ‘Reset’ hole can also clear the check code.)

Clearing the Interface PCB of an Inverter Outdoor Unit

This clears the alarm so that the Outdoor Unit can resume operation without having to reset power. However, this does not clear the check code in the Remote Controller - this is done either by the method described previously, or by using the ‘Reset’ hole.

Set the switches on interface PCB of the Inverter Outdoor Unit, SWO to "2", SWO2 to "16", and SWO3 to "1".

Push switch SWO4 for 5 seconds or more.

SWO1, 02, 03: Rotary switch SWO4, 05: Push switch SWO8: Dip switch

Also alarms in the indoor and lock alarm Display on 7-segment LED (B) changes to "CL" are released. (for 5 seconds). (However, the check code remains in the Remote Controller.) After then, alarms are detected as usual.

TOSHIBA Trial Operation

Clearing an Alarm by Resetting the Power Source

Be sure to reset the power sources of both the Outdoor and Indoor Units.

+ Turn the power OFF

+ Turn the power ON for the Outdoor Unit first.

+ Turn the power ON for the Indoor Unit next.

Even if the power source of the Outdoor Unit is re-set, the fault code is still displayed on

the Indoor Unit. To clear this, hold down the ‘CHECK’ button on the Remote Controller for at least 15 seconds.

Remote Controller Identification Function

This function identifies the Remote Controller connected to each Outdoor Unit.

( Power ON Set the switches on interface PCB of the Inverter

Outdoor Unit, SWO1 to "2", SWO2 to "4", and SWO3 to "1". SWO1, 02, 03: Rotary switch

SW04, 05: Push switch l SWO08: Dip switch

Push switch SWO4 for 2 seconds and more. Operation

"NON-PRIORITY: display on the connected Remote Check connected remote y on —_——

Controller flashes. "11" is displayed on 7-segment LED B. controller

Push switch SWO4 or SWOS for 2 seconds or more. À————— Completion

Other completion conditions: 1. Send operation continued for 10 minutes. 2. SWO1, SWO2 or SWO3 moved to other position.

TOSHIBA Trial Operation

Forcing the Electronic Control Valve (PMV) ‘Fully Open’ - on the Indoor Unit

This function forces the electronic control valves open in all the Indoor Units for 2 minutes. It is activated by a switch on the interface PCB of the outdoor Inverter Unit.

Usually, turning on the power to an Indoor Unit once fully closes the PMV - this function is used when you want to open the PMV fully for operation after the power has been turned off a second time.

Set SWOT to "2", SWO2 to "3" and SWO3 to “1” on interface PCB of the Inverter Outdoor Unit, and push SWO4 for 2 seconds or more. (7-segment LED [B] changes to "FF" for 2 minutes.)

Following Setup, the PMV automatically returns to its normal open pulse after 2 minutes. + is only opened fully for 2 minutes when it receives the FULL OPEN signal from the Outdoor Unit.

Forcing the Electronic Control Valve (PMV) ‘Fully Opened/Fully Closed” - on the Outdoor Unit

This function opens or closes the electronic control valve of an Outdoor Unit for 2 minutes.

Fully Open Short circuit CN30 on the interface PC board of the Inverter Outdoor Unit.

Fully Closed Short circuit CN31 on the interface PC board of the Inverter Outdoor Unit.

Both Fully Open and Fully Closed return to the normal open pulse after 2 minutes. Be sure to remove the short circuit after confirmation.

Notes: If bit 1 of DIP SWO8 is ON PMVI and PMV2 (Refrigerant Control) electronic control valves are

If bit 1 of DIP SWOB is OFF PMV3 (Cooling Bypass) electronic control valve is turned off.

TOSHIBA Troubleshooting

Main Remote Controller

Operating and Reading the Check Display

Push the CHECK button, and the identification number of the faulty Indoor Unit is shown in the Temperature Setup section of the display - and the check code is shown in the TIME section of the display.

If the air filter cleaning sign is displayed, the number of Indoor Units with a filter problem is indicated, followed by the check code.

LCD Display "Standby" Mode: + When combination of Indoor Units is over the capacity. + When Indoor Unit with command excepted by operation mode select switch. + When phase-sequence of power wiring is incorrect. Ve TOSHIBA ANETWORK> De Det ext IL remor cournoues ue en 5 ô ô i © © © TRERABAUST url O © © 00.0 ECC Lt LT pe) O \ © onor O C >) L Check Switch Reset Switch + Push for 0.5 seconds to display * Push the switch inside the hole with pin. CHECK code. The Remote Controller resets initialised. + Push for 3 seconds to reset indoor (AIl data is cleared.)

microprocessor. (While indoor microprocessor is locked by ALL STOP alarm.)

+ Push for 10 seconds to clear check data.

Filter Data Example: A Filter signal is sent from No. 1 and No. 15 units under grouping operation.

| | FILTER | | FILTER CHECK CHECK Check Data

Check code detected at first Check code detected at last

Example: Room Temp. sensor of No. 1 is defective. Example: There is no check In No. 15, first the Heat Exchanger sensor has data. failed. Next, the indoor/outdoor inter-unit wire (bus communication line) is defective.

CHECK CHECK CHECK UNIT UNIT ni [Dm LU ater | 12 [3 seconds! MIT LL 0-0 eee LIL + 21-22 .

TOSHIBA Troubleshooting

Room Remote Controller

Operating and Reading the Check Display

Push the CHECK button, and the identification number of the faulty Indoor Unit (1 - 16) is shown in the Temperature Setup section of the display - along with the check codes of up to

2 problems. If there is a filter display, the number of the Indoor Unit with a filter problem is shown on the right. E) TOSHIBA AL. LCD Display "Standby" Goes On:

When the phase sequence of the power wiring is incorrect.

When the combination of Indoor Units is over the capacity of the Outdoor Units.

LE AE When ‘Heating' is selected and the dominant operational mode is ‘Cooling’ - and vice versa.

T—— |" Push the switch in the hole with pin.

rs $ en Reset Switch

The Remote Controller resets the power source. © €) Quorr =) (AIl data is cleared.) D Check Switch

+ Push for 0.5 seconds to display CHECK code.

+ Push for 3 seconds to reset indoor microprocessor. (While indoor microprocessor is locked by ALL STOP alarm.)

CHECK code LILI Filter Data Example: A Filter signal is sent from No. 1 and No. 16 units under grouping operation.

UNIT UNIT 1 FILTER 1 [FILTER t (Lx

Check Data Example: Room temp. sensor of No. 1 is defective. In No.16, first the heat exchanger sensor has failed. Next, inter-unit wire (serial signal line) of indoor/outdoor is defective.

Example: There is no check data.

CHECK TOSHIBA Troubleshooting

| Liquid crystal remote controller CHECK code |

STANDBY display Over capacity Abnormal phase connection Indoor drain overflow alarm i Fed 5 outdoor Inverter outdoor unit unit} remot — Remote Control Inverter serial signal short circuit "04" - Control l—->] Remote control serial signal circuit "99" High level refrigerant detected if RBC-RD2-PE fited) Four:way vahe alarm “og” - Outdoor heat exchanger sensor (TE1) shom circuit mg || "18" LE Discharge temp. sensor (TD) short circuit ao” || ao" Discharge temp. sensor (TD2) short circuit ea [la Indoor sensor (TA) short or open circuit roc" Suction temp. sensor (TS) short circuit "a" || "a" Indoor heat exchanger sensor (TC1) short circuit 93" High pressure sensor (Pd) short circuit “AA “AA Indoor heat exchanger sensor (TC2) short circuit "94" Low pressure sensor (Ps) short circuit "ba" || "ba" Indoor Indoor pressure sensor short circuit "bg" Pressure sensor (Pd/Ps) miswiring ab || "ab Unit Motor short circuit mr Discharge temp. (MDI) protective operation né" || "né" Drain pump fault “ob” Discharge temp. (TD2) protective operation “bb || "bb" Refrigerant drculaïion amount shortage judgement"9F” Low Hz time discharge temp. (TD) protective operation AE" || “AE” Indoor/outdoor communication short circuit #95" Suction temp. (TS) protective operation "A7" "AT" Central management communication short circuit "97" High pressure (Pd) protective operation "22" || "22" Central management address set up fault 98" Low pressure (Ps) protective operation me" || "be" External input display fault “b5" Fixed-speed 1 high pressure SW short circuit rer || er {Low level refrigerant leak if RBC-RD1-PE fitted) Fixed-speed 2 high pressure SW short circuit ro” || “Fo” External interlock display fault "bé" Fixed-speed 1 IOL, OCR short circuits reé" || “Eé” (High level refrigerant leak if RBC-RD1-PE fitted) Fixed-speed 2 IOL, OCR short circuits Lis “Fi” Indoor Unit miswiring/misconnection "ox Inverter IOL short circuit "Es" - Indoor PC. board short cireuit 12" Mg-SW deposit controlling display “bd” “bd” Outdoor Unit power source phase order miswiring ap” || "a" Extension IC, EEPROM short circuit mc" || "1e" Outdoor|. ——"" Ouidoor PDU Indoor/Outdoor error & || - Unit High pressure SW circuit ne Indoor/Outdoor communication short circuit "95" - G-Tr short-circuit protective operation "14" No. of connected indoor units over capacity "96" - Current detection circuit ge Connected indoor units over capacity "89" - Compressor error md" Outdoor unit back-up operation prevented "8e" - Compressor breakdown mp" Reduction of No. of server outdoor unis “gd” - TH sensor circuit "43" No. of server outdoor unis over capacity "8e" - Heat sink overheat protective operation "dA Server outdoor address incorrect 2er _ Outdoor master unit incorrect rare || var” Server outdoor uni error "a" - Oil temp. (TK1) sensor short circuit radar || "aa" Oil temp. (TK2) sensor short circuit ras” || “as” Oil temp. (TK3) sensor short circuit dé" || “dé” Oil level low detection ra7" || va" Oil temp. (TK1) detection error rag” || “ds” Oil temp. (TK2) detection error ra" || "a" SV3C vahe blockage detection “db” || “ab” SV3C vahe leakage detection rac” || "ac" PMV refrigerant leakage detection rad” || “ad” Indoor address undefined” "dE" - Outdoor address undefined “ar” - Missing of R phase raz" || “87

Outdoor Unit Interface segment CHECK code |

*: No display on the remote controller

Note: To retrieve fault codes, ensure rotary switches 1, 2 and 3 on the Outdoor Interface PCB (MCC-1343-01) are all set to 1 (factory default setting).

TOSHIBA Troubleshooting

GB Check | Detected | Check code Cause Problem detection Check item code | position name condition 04 interface |Inverter Inverter serial | Serial signal from inverter | Outdoor PC. board (Interface, INV) error. communication | signal was interrupted. + Check communication connector (CN600) alarm between outdoor interface and INV PC. boards. High level 1000ppm refrigerant + Check integrity of refrigeration pipework refrigerant detected in compressor detected if housing RBC-RD2-PE is fitted 08 | Interface |Four-way valve | 4 way valve Abnormal refrigeration cycle | (Check all Outdoor Units) circuit data detected during + Check 4 way valve body error. heating operation. + Check 4 way valve coil and connection. + Check resistance characteristics of TS and TE sensors + Check output voltage characteristics of Pd and Ps pressure sensors. + Check fixed speed compressor power supply wiring and magnetic switch error. 0b |Indoor | Indoor drain Float switch +Float switch operates + Check connection of float switch connector overflow alarm continuously for 2 minutes. | (CN10). +Float switch circuit + Check drain pump operation. disconnected or connector | +Check drain pump circuit. was out of place. + Check blockage of water drain pipe. + Check indoor PC. board error. OC |indoor |Indoor TA sensor | Indoortemp. | Sensor resistance value + Check connection and wiring of TA alarm sensor (TA) was infinity or zero connector (CNO4). (Open, Short). + Check characteristics of TA sensor resistance value. + Check indoor PC. board error. 11 [indoor | Indoor fan motor | Indoor fan motor | Status that detection value _ | +Check connection and wiring of fan alarm circuit of motor speed was out of | connector (CNO7, CNI8). target was detected + Check running condenser error for continuously. indoor fan. + Check fan motor error. + Check indoor PC. board error. + Check effect of outside air process (OA). 12 [indoor |Otherindoor | Indoor PC. board | Indoor PC. board did not | +Check power source voltage. error (EEPROM/ operate correctly. + Check noise of peripheral equipment. Peripheral circuit) + Check power source transformer output voltage (DC12V). 14 Inverter G-Tr short uit | Inverter Instantaneous over-current + Check power source wi . protective system | over-current was detected when inverter | Check connection of connector on error protective circuit | compressor was activated. erter PC. board. + Check reactor connection. + Check AC fuse disconnection. + Check cause of abnormal overload operation. + Check inverter compressor error and rare short. +IGBT conductive check. + Check shortage of capacitor capacity. + Check outdoor PC. board (INV) error.

TOSHIBA Troubleshooting

Check | Detected | Check code Cause Problem detection Check item code | position name condition 17 |inverter | Current detection | Inverter current | Current flows over the set | + Check wiring of current detection circuit circuit system detection circuit | value when inverter system. alarm compressor stop was + Check outdoor PC. board (INV) error. detected. 18 [interface |TEI sensor Outdoor heat | Sensor resistance value was | +Check connection of TE sensor alarm exchanger infinity or zero (Open, Short) | connector. sensor (TE) {automatic back-up operation| + Check characteristics of TEI sensor after judgment). resistance value.

+ Check outdoor PC. board (Interface) error.

1C |interface |Extension IC, | Outdoor interface| Outdoor PC. board + Check power source voltage. EEPROM alarm | PC. board circuit | (Interface) did not + Check power source noise. operate correctly. + Check outdoor PC. board (Interface) error. 1d | Outdoor | Compressor Inverter Over-current was detected |+ Check inverter compressor lock. alarm compressor several seconds after + Check power source voltage system circuit inverter compressor was (AC380 to 415V + 10%). adtivated. + Check wiring of inverter compressor system and miss-phase. + Check connection of connecter on inverter RC. board. + Conductive check for crank case heater. Activation error check by liquid stagnation in compressor). + Check outdoor RC. board [INV) error. 1F | Outdoor | Compressor Inverter current | After inverter frequency + Check power source voltage break down detection circuit | reduced by current release, (AC380 to 415V + 10%). over-current was detected + Check cause of abnormal overload and stopped. operation. + Check current sensor detection circuit system.

Check outdoor RC. board (INV] error.

TOSHIBA Troubleshooting

Check | Detected | Check code Cause Problem detection Check item code | position name condition 21 | Outdoor |+Inverterhigh- | Inverter high High-pressure SW or IOL + Check inverter high-pressure SW error. pressure SW | pressure SW operated. + Check IOL operation and case temp. up. system alarm | system circuit + High-pressure Pd {Check cause of overload operation.) > 2.5MPaG: + Check service valve full open. [21] is displayed + Check connection of outdoor fan connector. + High-pressure Pd + Check outdoor fan motor, running < 2.5MPaG: condenser error. [ES] is displayed + Check blockage of outdoor PMV. 1) Refrigerant reducing circuit (PMVI, PMV2).

2) Cooling bypass circuit (PMV3). 3) Liquid line stopping check valve {Cooling only model).

+ Check blockage of outdoor/indoor heat exchanger.

+ Short-circuit status between outdoor discharge air and suction air.

+ Check Pd pressure sensor error.

+ Check blockage of hot gas bypass SV2 d it.

+ Check outdoor RC. board Interface) error.

+ Check open valve status of indoor PMV.

+ Check miswiring of communication line between indoor and outdoor.

22 interface |High-pressure | High pressure | Pd sensor detected + Check Pd pressure sensor error. protective up protection by _ | 3.3MPaG or more. + Check service valve full open. operation high-pressure + Check cause of overload operation. Pd sensor + Check connection of outdoor fan connector. detection value + Check outdoor fan motor, running condenser error.

+ Check blockage of outdoor PMV. 1) Refrigerant reducing circuit (PMVI, PMV2). 2) Liquid line stopping check valve {Cooling only model). + Check blockage of outdoor/indoor heat exchanger. + Short-circuit status between outdoor discharge air and suction air. + Check blockage of hot gas bypass SV2 circuit. + Check outdoor RC. board Interface) error. + Check indoor side fan system error (cause of air volume down). + Check open valve status of indoor PMV. + Check miswiring of communication line between indoor and outdoor.

TOSHIBA Troubleshooting

Check | Detected | Check code Cause Problem detection Check item code | position name condition 89 |interface | Indoor capacity | Total connected | Total capacity of indoor units | + Check indoor unit connection capacity. over capacity of was 135% more than total | + Check indoor unit HP capacity. indoor units capacity of outdoor units. + Check outdoor HP setup. greater than + Check outdoor RC. board (INV) error. outdoor units 8C | Interface | Outdoor unit Heat mode Operation mode of the system | +If outdoor unit back-up operation is being back-up operation] selection during | changed to HEAT during set-up heating operation is not available. prevented set-up operation setup of outdoor unit 8d | interface | Reduction of No. | No. of connected | No. of connected outdoor | + Check connection of communication of connected outdoor units | units was judged to be less connector. outdoors communication _ | than No.of units stored in + Check communication line between memory of EEPROM. outdoor units. INOTE] + Check power source OFF (power source Hthis code is displayed when | breaker) of outdoor unit. back-up operation of outdoor | + Check outdoor RC. board [Interface) error. error was performed, set + Check outdoor back-up setup. Alarm clear”. 8E | interface | Excessive No. No. of connected | No. of outdoor units + Check connected No. of outdoor units of connected outdoor units | exceeded 5. (Max. 5 units per 1 system). outdoors communication + Check communication line between outdoor units. + Check outdoor PC. board (Interface) error. 8F |interface | Constant-speed | Duplication of | Address No. offixed-speed | Check address switch setup of fixed-speed outdoor address | manual address | outdoor unit was duplicated | outdoor. duplication switch setup of | when address setup of + Check outdoor PC. board (Interface) error. fixed-specd outdoor unit was performed outdoor manually. 93 Indoor Indoor TC1 Indoor gas + Sensor resistance value was | + Check connection of TC1 sensor sensor alarm pipe temp. infinity or zero (Open, Short). | connector (CN12). sensor (TC1) + Check characteristics of TC1 sensor resistance value. + Check indoor RC. board error. 94 Indoor Indoor TC2 Indoor liquid + Sensor resistance value was | + Check connection of TC2 sensor sensor alarm pipe temp. infinity or zero (Open, Short). | connector (CNOS). sensor (TC2) + Check characteristics of TC2 sensor resistance value. + Check indoor RC. board error.

Problem detection condition

Communication alarm between indoor and outdoor

Inter-unit wire between indoor and outdoor {PQ control line)

+ There was no inverter outdoor unit.

+ Check power source of indoor unit. {is power turned on?)

+ Check power source of outdoor unit. {is power turned on?)

+ Check connection and disconnection of communication line (PQ) between indoor and outdoor.

+ Check connection of communication connector (CN24) of indoor RC. board.

+ Check connection of communication

connecter of outdoor PC. board.

Check indoor PC. board error.

Check outdoor RC. board (Interface) error.

+ Check inverter outdoor setup (Presence of setup/duplication] when check code [UII-9ILS] is displayed at outdoor.

Disagreement detected between indoor and outdoor address

Inter-unit wire between indoor and outdoor {PQ control line)

+ No of connected indoor units exceeded 40.

Connected to other outdoor system or central management remote controller.

+ Check No. of indoor units connected to outdoor.

+ Check connection and miswiring of communication line (PQ) between indoor and outdoor.

+ Check connection of central management remote controller wiring.

(Check connection and miswiring of communication line (X).) + Check outdoor RC. board (Interface) error.

BUS communication alarm (1)

Central management system communication circuit

Communication of central management system was interrupted.

+ Check communication line (XY) at outdoor side or indoor side. + Check connector (CN15) on indoor PC. board. + Check indoor power source wiring and voltage. Check central management controller and indoor power source system. {Check whether one side is not tumed on.) Check peripheral noise. Check indoor PC. board error. Check power failure. (Problems may be caused by central management side by power failure. The returns to normal status by resetting power source.)

BUS communication alarm (2)

Central management address setup

Addresses duplicated.

+ Check communication line (XY] at outdoor side or indoor side.

+ When grouping operation is performed, check communication line of indoor unit.

When connecting XY communication line

to indoor unit (No.2 to No.1é), check

code [98] is displayed.

+ Network address duplication check.

+ Indoor PC. board error check.

+ Check No. of connected central management controllers. {f multiple units are connected, correct to 1 unit.)

+ Check central management controller.

TOSHIBA Troubleshooting

Check | Detected Check code Cause Problem detection Check item code | position name condition 99 Remote Indoor remote Indoor remote Serial between indoor PC. * Check remote controller wire (ABC). controller | controller controller board and remote controller + Check disconnection and connector communication | communication | was interrupted. contact error. alarm circuit + Check remote controller error.

+ Check indoor PC. board error. + Check duplication of indoor unit No.1. {When grouping operation is set up.)

9A [indoor [Indoor miswiring/ | Miswiring or Change of detection + Check miswiring of indoor unit for which misconnection | misconnection | value of indoor unit temp. alarm is displayed. of indoor unit sensor or pressure sensor + Check blockage in pipe of indoor unit for ‘after operation has started. which alarm is displayed. + Judgement time: + Check refrigerant shortage. Approx. 15 minutes [NOTE] fer activation. When checking miswiring, follow the steps + Cooling: when changed below: value of TCI is 5°C or less. 1) Check miswiring after stopping outdoor

unit for 20 minutes or more. Microprocessor is locked so that miswiring check function does not operate forcibly for 2 minutes and 30 seconds after power has been turned on.

2) Check miswiring under the following conditions:

In cooling Room temp. : 18 to 32°C Outside temp. : 15 to 43°C

3) When grouping operation over other outdoor system is performed, miswiring check function cannot be used.

9F [indoor |Indoor PMV Refrigerant Refrigerant did not flow in + Check indoor PMV open valve status. blockage circulation indoor unit. + Check characteristics of TC1, TC2, and TA volume shortage _ | + Compared with TA temp., sensor resistant value. TCI and TC2 temp. are + Check indoor pressure sensor error. continuously below 4°C for | + Check indoor PMV connector and wiring. 60 minutes. + Check breakage and blockage of pipe. + Check operation status of outdoor compressor.

{When outdoor fan operates and compressor stops, error is shown on indoor side. In this case, check outdoor side.)

AO Interface | TD1 sensor Discharge temp. Sensor resistance value is + Check connection of TD1 sensor connector.

alarm sensor (TDI) infinity or zero (Open, Short). | + Check characteristics of TDI sensor resistance value.

+ Check outdoor PC. board (Interface) error.

AT Interface | TD2 sensor Discharge temp. Sensor resistance value is + Check connection of TD2 sensor connector.

alarm sensor (TD2) infinity or zero (Open, Short). | + Check characteristics of TD2 sensor resistance value.

+ Check outdoor PC. board (Interface) error.

A2 Interface |TS1 sensor Suction temp. Sensor resistance value is + Check connection of TS1 sensor connector.

alarm sensor (TSI) infinity or zero (Open, Short). | + Check characteristics of TS1 sensor resistance value.

+ Check outdoor PC. board (Interface) error.

A3 Interface | TS2 sensor Suction temp. Sensor resistance value is + Check connection of TS2 sensor connector.

alarm sensor (TS2) infinity or zero (Open, Short). | + Check characteristics of TS2 sensor resistance value.

+ Check outdoor PC. board (Interface) error.

GB TOSHIBA Troubleshooting

Check | Detected | Check code Cause Problem detection Check item code | position name condition A6 |interface |Discharge temp. | Discharge temp. | Protective stop was repeated | Check outdoor service valve is TDI alarm MDI) protective | for more than three times (Gas side, Liquid side) full open. operation when discharge temp. TD + Check blockage of outdoor PMV. ‘exceeded 130°C. 1) Refrigerant reduction circuit (PMV1, PMV2). 2) Cooling bypass circuit (PMV3). 3) Liquid line stopping check valve (cooling only model). + Check characteristics of TD1 sensor resistance value. + Check 4 way vale error. AT [interface |TS condition Suction temp. Protective stop when status + Check refrigerant shortage. gas leak protective suction temp. TS is above + Check outdoor service valve (Gas side, detection operation the critical temp. continues Liquid side) full open. SI, TS2) for 10 minutes and was + Check blockage of outdoor PMV. repeated for three times or more. _ 1) Refrigerant reducing circuit <TS alarm critical temp.> (PMVI, PMV2). In cooling: 60°C or more. 2) Liquid line stopping check valve (cooling only model). + Check characteristics of TS1, TS2 resistance value. + Check 4 way vale error. AB Interface | TE2 sensor Outdoor heat Sensor resistance value is + Check connection of TE2 sensor connector. alarm exchanger infinity or zero (Open, Short}. | + Check characteristics of TE2 sensor sensor (TE2) resistance value. + Check outdoor PC. board Interface) error. AA | interface | Pd sensor High-pressure | Pd sensor output voltage is + Check connection of P sensor connector. alarm Pd sensor zero (Sensor open). + Check Pd sensor error. + Check outdoor PC. board [Interface) error. A5 [interface |Misconnection of | Miswiring of + High-pressure Pd sensor and | + Check connection of high-pressure Pd pressure sensor | pressure sensor Low-pressure Ps sensor sensor connector. (Pd, Ps) were exchanged. + Check connection of low-pressure Ps + Output voltage of both sensor connector. sensors are zero. + Check pressure sensor Pd and Ps error. + Check outdoor PC. board [Interface] error. + Check miswiring of fixed-speed compressor terminal. {inverse operation of fixed-speed scroll compressor) + Check compressor function error.

TOSHIBA Troubleshooting

Check | Detected | Check code Cause Problem detection Check item code | position name condition AE [interface |Detection ofTD1 | Discharge temp. | Protective stop when discharge | + Check refrigerant shortage. condition gas increased when |temp. TD1 detected 10°C or | Check blockage of outdoor PMV. leak small capacity of _ |more when inverter 1) Refrigerant reduction circuit indoor operates | compressor operated at low (PMVI, PMV2). (Di) frequency and was repeated 2) Cooling bypass circuit (PMV3). three times. 3) Liquid line stopping check valve (cooling only model). + Check characteristics of TD sensor resistance value. + Check blockage of indoor filter. + Check blockage of pipe. AF [interface |Phase order Phase order error was + Check phase order of outdoor power alarm phase order of | detected when power was source wiring. outdoor unit turned on. + Check outdoor PC. board (Interface) error. b2 Interface | TD3 sensor Discharge temp. Sensor resistance value is + Check connection of TD3 sensor connector. alarm sensor (TD3) infinity or zero (Open, Short). | + Check characteristics of TD3 sensor resistance value. + Check outdoor PC. board (Interface) error. b3 |interface |TD4 sensor Discharge temp. | Sensor resistance value is + Check conn of TD4 sensor connector. alarm sensor (TD4) infinity or zero (Open, Short). | + Check characteristics of TDA sensor resistance value. + Check outdoor PC. board (Interface) error. b4 interface |Ps sensor Low-pressure +Ps sensor output voltage + Misconnection of connector between Pd alarm Ps sensor was 2810. sensor and Ps sensor. +Ps pressure detected + Check connection of Ps sensor connector. continuously 0.95MPaG or + Check Ps sensor error. more during operation. + Check compressor function error. + Check 4 way vahe error. + Check outdoor PC. board (Interface) error. b5 |indoor |indooroutside | Alarm display +By voltage value Vemg to + When outside equipment is connected to input alarm by outside input | be input in outside alarm connector (CN21) input terminal. 1) Check outside equipment error. (Vemg <3.75V was detected | 2) Check indoor PC. board error. or 60 seconds.) + When outside equipment is not connected 40 connector (CN21): 1) Check indoor RC. board. bé |indoor |indooroutside | Display of +By voltage value Vemg to + When outside equipment is connected to interlock outside interlock | be input in outside alarm connector (CN21) input input terminal. 1) Check outside equipment error. (Vemg <1.25V was detected | 2) Check indoor PC. board error. or 60 seconds.) + When outside equipment is not connected 40 connector (CN21): 1) Check indoor RC. board. b9 |indoor |indoorpressure | Indoor pressure | Indoor pressure sensor + Check connection and wiring of indoor sensor alarm sensor output was zero. pressure sensor connector (CNO7). {After judgement, operation | + Check indoor pressure sensor error. transits to automatic back-up | + Check indoor PC. board error. operation.)

TOSHIBA Check of Density Limit

The room in which an air conditioning unit is to be installed requires a design such that, should there be a refrigerant leak, the density of the gas will not exceed a set limit.

The refrigerant R407C which is used in the system is safe, without the toxicity or combustibility of ammonia. However, since it's an asphyxiant it poses the risk of suffocation if its density should rise excessively.

Suffocation from leakage of R407C is almost non-existent. With the recent increase in the number of high density buildings, however, the installation of multi air conditioner systems is on the increase because of the need for effective use of floor space, individual control, energy conservation by curtailing heat and carrying power etc. Most importantly, the multi air conditioner system is able to replenish a large amount of refrigerant compared with conventional individual air conditioners.

If a single unit of the multi air conditioner system is to be installed in a small room, select a suitable model and installation procedure so that if the refrigerant accidentally leaks out, its density does not reach the limit - and in the event of an emergency, measures can be taken before injury occurs.

In a room where the density may exceed the limit, create an opening with adjacent rooms, or install mechanical ventilation combined with a gas leak detection device.

The density is: Total amount of refrigerant (kg) Min. volume of the Indoor Unit installed room (m°) < Density limit (kg/m°) The density limit of R407C which is used in multi air conditioners is 0.15kg/m°. Note 1:

If there are 2 or more refrigerating systems in a single refrigerating device, the amounts of refrigerant should be as charged in each independent device.

e.g., charged amount (10kg) —) G: 8. charged amount (15kç)

Room À | Room B | Room C | Room D] Room E { Room F Indoor Unit

For the amount of charge in this example: The possible amount of leaked refrigerant ga: rooms À, [B] and C is 10kg. The possible amount of leaked refrigerant gas in rooms D, E and F is 15kg.

TOSHIBA Troubleshooting

Note 2: The standards for minimum room volume are as follows. (1) No partition (shaded portion).

(2) When there is an effective opening with the adjacent room for ventilation of leaking refrigerant gas (i.e. an opening without a door, or an opening 0.15% or larger than the respective floor spaces at the top or bottom of the door).

Outdoor Unit efrigerant tubing

Re 27 AL Indoor Unit

(3) If an Indoor Unit is installed in each partitioned room and the refrigerant piping is interconnected, the smallest room becomes the object. But when a mechanical ventilation is installed interlocked with a gas leakage detector in the smallest room where the density limit is exceeded, the volume of the next smallest room becomes the object.

/ Refrigerant piping

Mechanical ventilation device - Gas leak detector

Note 3: H + + se : Range below the

The minimum indoor floor space | |_ density limit of

compared with the amount of refrigerant 0.15kg/m°

: . | _(countermeasures

is roughly as shown: . 8 Rat ncedod)

{When the ceiling is 2.7m high) ci co] £ = Ranger above the 5 density limit of 3 0.15kg/m < {countermeasures _L_ £ needed)

—+ Total amount of refrigerant kg

TOSHIBA Environmental

Precaution for Refrigerant Leakage

This air conditioning system contains HFC R407C refrigerant gas. We recommend that the installer should compare the total amount of refrigerant contained in the system with the air volume of each of the rooms in which an indoor unit has been installed. This practice is of particular importance when installing a system with a large refrigerant volume. Using these

À figures, calculate the worst case refrigerant density (using the total refrigerant charge) in the unlikely event of a leak. If the resultant density level exceeds that of the standard, then either a ventilation system or alarm system, or both, must be installed. The above procedure must be completed in accordance with local, national and international standards, codes of practice and statutory requirements.

To minimise the chances of environmental damage and to ensure the efficient operation of ÂÀ the unit, it is recommended to have the air conditioner periodically checked and serviced by a qualified engineer.

À Please dispose of the air conditioner unit in an environmentally responsible manner. Recycling is the preferred disposal method.

À When disposing of an air conditioner system, contact either the manufacturer, your local environmental control authority or a local waste disposal company for advice.

VAN Ensure all packaging material is either recycled or disposed of in accordance with local regulations.

À The refrigerant gas within the unit should only be removed by an authorised company.

WARNING: Discharge of refrigerant to atmosphere is illegal and may lead to prosecution.

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Benaming Controle code

Benaming Controle code