MasterCella compact - Temperature regulator Carel - Free user manual and instructions

Product Type	Temperature regulator for refrigeration units
Brand	Carel
Model	MasterCella compact
Power supply	230 Vac, +10% -15%, 50/60 Hz
Power consumption	7 VA
Dimensions (L x H x D)	190 x 160 x 65 mm
Protection rating	IP65
Enclosure material	Self-extinguishing plastic (UL94-V0)
Mounting type	Panel or wall mount
Operating temperature range	0 to 50 °C
Operating relative humidity	20 to 80% RH (non-condensing)
Inputs	2 configurable digital inputs (dry contact), 2 NTC probes (10 kΩ at 25 °C)
Relay outputs	Compressor, defrost, fans, light/aux, alarm
Display	2.5 digits, LED indicators
Main functions	Compressor management, defrost (electric or hot gas), fans, alarms, continuous cycle, light
Cleaning	Use only neutral detergents and water
Safety	Installation by qualified personnel, disconnect before any intervention
Insulation class	Class II
Compliance	EN 60730-1

Frequently Asked Questions - MasterCella compact Carel

How to set the setpoint (desired temperature)?

Press the SET key for 1 second to display the value, then use the ▲ or ▼ keys to adjust, and press SET again to confirm.

How to perform a manual defrost?

Press the ▼ key for more than 5 seconds to force a defrost cycle, provided that the defrost probe temperature is lower than the programmed defrost end temperature.

How to disable the audible alarm?

Press the ① key to disable the buzzer and reset the alarm relay. The alarm code remains displayed until the cause disappears.

What does the flashing display E0 mean?

It is a regulation probe error. Check the cable and probe compatibility (NTC Carel 10 kΩ at 25 °C). Measure the probe resistance when disconnected.

How to configure the digital inputs?

Set parameters A4 (for ID1) and A5 (for ID2) according to the desired function: alarm, defrost enable, door contact, etc. (0 to 7).

What is the procedure to modify the configuration parameters?

Press the PRG and SET keys simultaneously for 10 seconds, enter the password 22, then navigate with the keys and confirm with SET. To save, press PRG.

How to install the controller on panel?

Drill a hole of 182x153 mm, remove the cover, separate the parts, insert the gasket, fix with the supplied screws (max 20 mm), then reconnect the terminal block and close.

What does the flashing of the LEDs mean?

The LEDs flash in case of delay, alarm or open door. Refer to the alarm table (section 5) to identify the problem.

How to clean the instrument?

Use only neutral detergents and water. Avoid solvents or aggressive products. Do not immerse the device.

What are the recommended installation conditions?

Avoid places with rapid temperature changes, humidity >80%, continuous water jets, or strong magnetic interference. Separate the probe cables from power cables.

USER MANUAL MasterCella compact Carel

Simple gray oval shape with a vertical line inside, no text or symbols present.

AVVERTENZE IMPORTANTI

PRIMA DI INSTALLARE O INTERVENIRE SULL'APPARECCHIO, LEGGERE ATTENTAMENTE E SEGUIRE LE ISTRUZIONI CONTENUTE IN QUESTO MANUALE.

CAREL Master Cells compact SET i h MasterCella d e l c a b

Fig. 1.2.1

We wish to save you time and money!

We can assure you that a thorough reading of this manual will guarantee correct installation and safe use of the product described.

GB

IMPORTANT

BEFORE INSTALLING OR OPERATING ON THE DEVICE, CAREFULLY READ THE INSTRUCTIONS IN THIS MANUAL.

This instrument has been designed to operate without risks only if:

• installation, operation and maintenance are performed according to the instructions of this manual;
  • environmental conditions and supply voltage fall within the values indicated here below.

Any different use or changes which have not been previously authorised by the manufacturer, are considered improper.

Responsibility for injures or damage caused by improper use will fall exclusively on the user.

Warning: voltage is present in some electrical components of this instrument, thus all the service or maintenance operations must be performed by expert and skilled personnel only, aware of the necessary precautions to be taken.

Before accessing the internal parts, disconnect the power supply.

Disposing of the parts of the controller

The controller is made from metal parts and plastic parts.

All these parts should be disposed of according to local standards on waste disposal.

Cleaning the controller

Only use neutral detergents and water.

Contents

Introduction 23

1. Installation and connections 23

1.1 General warnings – installation and connection environments 23
1.2 Panel installation 24
1.3 Wall-mounted installation 25
1.4 Electrical connections 26

2. Function and description of the buttons 27

3. Operation 28

3.1 Display 28
3.3 Manual defrost 28
3.4 Silencing the buzzer 28
3.5 Light ON/OFF 28

3.2 Set Point (required temperature value) 28

3.6 Continuous cycle 28

4. Parameters 29

4.1 First level - frequent parameters 29
4.2 Second level - configuration parameters 29
4.3 Modifying and saving the parameters 29
4.3.1 Modifying 29
4.3.2 Saving 29
4.4 Configuring the digital inputs 30
4.4.1 Duty setting selection (parameters c4 and A6) 30
4.5 Table of the parameters 31

5. Alarms, signals and troubleshooting 33

6. Technical specifications 34

6.1 General characteristics 34
6.2 Electrical specifications 34
6.2.1 Inputs 34
6.2.2 Outputs 34
6.3 Mechanical characteristics 35
6.4 Dimensions 35

Introduction

MasterCella is a control for static or ventilated refrigerated units. It manages all devices: compressors, fans, defrost, alarms and lights. The enclosure is IP65 and cable connection is extremely easy thanks to an easily removable front cover. MasterCella belongs to a range of controls able to meet customer requests.

Thanks to the chosen case, the MasterCell can be both panel-mounted and wall-mounted.

1. Installation and connections

1.1 General warnings – installation and connection environments

The following conditions represent the correct installation:

1. avoid installing the instrument in environments featuring: wide and rapid fluctuations in ambient temperature, relative humidity over 80%, exposure to direct jets of pressurised water, high levels of electromagnetic and/or radio-frequency interference (e.g. transmitting antennae);
2. use cable terminals that are suitable for the terminals being used. Loosen each screw and insert the cable ends, then tighten the screws. Once this operation has been completed, lightly tug the cables to check that they are sufficiently tight;
3. separate as much as possible the probe and digital input cables from cables carrying inductive loads and power cables, to avoid any electromagnetic disturbance. Never lay power cables and probe cables in the same channels (including those for the electrical cables). Do not install the probe cables in the immediate vicinity of power devices (contactors, thermal overload switches or the like);
4. reduce the path of the sensor cables as much as possible and avoid laying spiral paths around power devices. To extend the probe cables, use cables with a minimum cross-section of at least 0.5mm ^4 ;
5. the cables to be connected to the contacts of the controller must be resistant to the maximum operating temperature, determined by summing the maximum ambient temperature envisaged to the heat produced by the controller equal to 20^ C;
6. a 50mAT, 250Vac slow-blow fuse must be fitted upstream of the power supply to the controller;
7. protect the power supply to the loads connected to the controller (compressor, defrost, fan, etc..) using suitable devices (thermal-magnetic overload switch/switches), rated according to the corresponding loads connected.

Advertency. Safety information.

Before any servicing on the card disconnect power supply from the card in order to safeguard the personnel against injury and the card itself against damages.

Electrical damage on electronic components usually occurs because of electrostatic discharges caused by the operator.

Therefore, when handling these components, you must refer to the following:

• before using any electronic component or card, touch a grounding (it is not sufficient not to touch, because a 10000V discharge, a very easy voltage value to reach with static electricity, produces an electric arc of about 1cm);
• t he components must be kept inside their original package as long as possible. If necessary, take the main board from a package and put it into an antistatic package without touching the back of the board with your hands;
• absolutely avoid non-antistatic plastic bags or sponge and polystyrene;
• do not hand in the card directly to other among operators (to avoid any electrostatic induction and discharges).

Retro / Rear CAREL MasterCella Guarnizione Gasket MasterCella Frontale / Front

Fig. 1.1.1

1.2 Panel installation

In reference to Fig. 1.2.1 and the corresponding parts:

1. Make a hole in the panel with the following dimensions: 182x153mm.
2. Unscrew the two frontal screws (Fig. 1.2.1, a, b) and take out the central door (part c).
3. Unscrew the two screws (parts d, e) that keep the lower and frontal cover of the MasterCella connected and separate the two parts.
4. Insert the panel gasket in the front panel, on top of the internal gasket.
5. Make two holes in the back part (Fig. 1.3.1 in the perforated part - parts f, g).
6. Join the back part and the front, with the panel in between, and fix the whole unit with the two screws (dimensions: 4x20*mm) that are contained in the kit.

* max length 20 mm.

Warning: the two upper fastening teeth (part h) must be removed from the front panel before inserting the unit in the panel. Make the hole on the upper (part i) or lower part (part l) of the rear for the passage of the cables. The step of the thread can vary from PG9 (diameter 16mm) to PG21 (diameter 29mm).

A drill or miller should be used to assist the drilling operation. Connect the wires to the terminal block. Retighten the screws (parts d, e), then close the door (part c).

CARE1 Master Cella compact SET i h MasterCella d e l a b c

Fig. 1.2.1

1.3 Wall-mounted installation

With reference to Fig. 1.3.1:

1. Unscrew the two frontal screws (Fig. 1.1.1, parts a, b) and remove the central door (part c).
2. Unscrew the two screws (parts d, e) that keep the lower and frontal cover of the MasterCella connected and separate the two parts.
3. Once having decided where to pass the cable duct or the cables (from above or from below) and having made the proper holes (in the part drilled in advance - parts i, l) for cablepresses and pipepresses, make three holes (parts m, n, o) both in the MasterCella and in the wall itself.
4. Insert the wall-nugs, contained in the kit, into the holes made in the wall and then fix the back part of the MasterCella with the three screws (parts m, n, o) and the relevant O-Rings to the wall itself.
5. Fix the cablepresses or pipepresses before mounting the frontal part of the datalogger.
6. Mount the frontal part, being careful with the positioning of the upper teeth (part h) and the proper fixing of the two screws (parts d, e) (do not press excessively in order to avoid plastic deformation).
7. After connecting the cables to the terminal block, shut the door (part c).

parte superiore upper part 120 100 parte posteriore back side m n f g o i parte inferiore lower part

Fig. 1.3.1

1.4 Electrical connections

See in fig. 1.4.1, the diagrams of the electrical connections

graph LR
    A["1"] --> B["2"]
    B --> C["3"]
    C --> D["4"]
    D --> E["5"]
    E --> F["6"]
    F --> G["7"]
    G --> H["8"]
    H --> I["9"]
    I --> J["10"]
    J --> K["11"]
    K --> L["15"]
    L --> M["16"]
    M --> N["17"]
    N --> O["18"]
    O --> P["19"]
    P --> Q["20"]
    Q --> R["21"]

    S["Sonda ambiente Room probe"] --> T["non connesso not connected"]
    U["ID1"] --> V["ID2"] --> W["RS-485"]
    X["Input digitali programmabili Programmable digital inputs"] --> Y["Compressor Compressor"]
    Z["N Allarme Alarm"] --> AA["FUSE 50mA T 250 Vac +10%-15%"]
    AB["N F"] --> AC["230 Vac +10%-15%"]

graph LR
    A["1"] --> B["Sonda ambiente Room probe"]
    B --> C["Sonda sbrinam. Defrost probe"]
    C --> D["ID1"]
    C --> E["ID2"]
    C --> F["RS-485"]
    D --> G["Input digitali programmabili Programmable digital inputs"]
    E --> G
    F --> G
    G --> H["10 11"]
    H --> I["Compressor Compressor"]
    I --> J["Sbrin. Vent. Defr. Fan"]
    J --> K["Luce (AUX) Light (AUX)"]
    K --> L["12 13 14"]
    L --> M["15 16"]
    M --> N["17 18 19"]
    N --> O["20 21"]
    O --> P["FUSE 50mA T 250 Vac"]
    P --> Q["N Allarme Alarm"]
    Q --> R["N F 230 Vac +10%-15%"]

Fig. 1.4.1

2. Function and description of the buttons

The function buttons feature an easy to use format. In particular, buttons no. 1, 5, 6 (Fig. 2.1) can have more functions, as following described.

① Silences the buzzer, while the alarm code remains as long as the alarm condition remains:
- if pressed when turning On the instrument: allows to restore the default parameters (see section "Alarms, signalling and troubleshooting");
- if pressed for more than 5 seconds: allows access to the frequent parameters selection menu (F);
- if pressed for more than 5 seconds together with the SET button: a llows access to the configuration menu through password 22 (see section "Second level: configuration parameters");

① ② ③ prg SET 4 5 6

Fig. 2.1

② if pressed for more than 5 seconds: activates/deactivates a continuous cycle, that is the forced activation of the compressor for a period to be selected (see parameter "cc");

③ allows the switching On/Off of the refrigerating unit.

Warning: when the controller is OFF, all outputs, with the exception of the light output and the light button, will be deactivated whereas the On/Off led will be flashing. It is necessary to select the c2 parameter to ensure that, between one switching Off and the following switching On, the minimum time the compressor is Off is maintained. The ON/OFF button can be deactivated: it is sufficient to select one digital input as remote ON/OFF (see "Configuring the digital inputs").

④ selects the Set Point (see "Set Point");

displays the value of the selected parameter (see Modifying and saving the parameters);

- if pressed for more than 5 seconds together with the prg button: allows access to the configuration menu through password 22 (see "Second level: configuration parameters");

⑤ decreases the data value on the display during selection of Set Point and/or parameters;

- if pressed for more than 5 seconds: it forces a manual defrosting cycle;

⑥ activates/deactivates the lights of the cold room (or any other aux. output connected to the 4th relay); increases the displayed value during selection of Set Point and/or parameters.

LED indicators

cooling ON fan evaporator activated

defrosting in progress lights ON

"continuous cycle" functioning unit deactivated (OFF unit)

If a LED flashes, refer to the section "Alarms, signalling and troubleshooting".

3. Operation

3.1 Display

During normal functioning the display shows the value read by the ambient probe. In case of alarm the temperature values will flash alternately with the connected alarm code. When the controller is deactivated (OFF unit) the On/Off led flashes while the display shows the temperature read by the probe.

3.2 Set Point (operating temperature)

1. Press for one second the button to visualise the Set Point value;
2. after some seconds, the selected value will flash;
3. either increase or decrease the Set Point value by pressing the buttons and;
4. press the button to confirm the newly set value.

3.3 Manual defrost

Press the button for more than 5 seconds to force a defrosting cycle which will be activated only if the conditions are favourable (for example, the defrost probe should be lower than the selected defrost end temperature. For further information see the technical manual).

3.4 Silencing the buzzer

Pressing the button, besides silencing the buzzer, the alarm relay is reset, while the alarm code remains displayed until the cause of the alarm has been removed.

3.5 Light On/Off

Press the button to activate/deactivate the lights or any other auxiliary output.

3.6 Continuous cycle

To activate the 'continuous cycle' functioning press the button for at least 5 seconds (compressor activated for the time selected with the cc, parameter = duration of continuous cycle).

So as to deactivate the continuous cycle functioning, press the button again for 5 seconds.

4. Parameters

The parameters have been organised into two levels.

4.1 First level: frequent parameters (F)

They are indicated with F in the table and the password is not necessary to gain access to them. To modify them operate as follows:

1. press the button for about 5 seconds (in case of alarm, first silence the buzzer);
2. the display shows the code of the first parameter to be modified.
   To modify the parameters see the Modifying and saving the parameters section.

4.2 Second level: configuration parameters (C)

They are indicated with C in the table and it is necessary to insert the password for any modification, as indicated here below:

1. press simultaneously the and buttons for about 5 seconds;
2. the display shows 00;

3. press the or button until 22 (password) is displayed;

4. confirm by pressing button;

5. the display shows the code of the first parameter to be modified.

To modify the parameters see the following section, Modifying and saving the parameters.

4.3 Modifying and saving the parameters

4.3.1 Modifying

After having entered the configuration level, to modify a parameter operate as follows:

a. press and/or until the parameter to be modified is displayed (refer to the parameters table);
b. press the button to visualise the value associated to the parameter;
c. modify its value by pressing the 🎨 and/or 🎨” buttons until the desired value is displayed;
d. press the button to tempor ____arily confirm the newly set value and to go back to the param. code display;
e. repeat all operations from the point "press and/or " to modify other parameters values. Per memorizzare passare a "Saving".

4.3.2 Saving

To store the new set values of the parameters:

1. Press the button to store definitively all the new set values and exit the procedure.

2. It is possible to exit without modifying parameters: do not press any button for at least 60 seconds (TIME OUT exit).

3. If the button is not pressed after modifying operations, all the effected variations will be lost, and the starting values will be restored.

4.4 Configuring the digital inputs

Digital inputs ID1 and ID2 can take on different functioning modes according to the value given to the parameter A4 (relative to ID1 input), and to A5 (relative to ID2). The main functions are.

ValueA4 / A5	Meaning	Function
0	I	nput non active
1	I	mmediate external alarm Open Contact = alarm active
2	E	xternal alarm with delay Open contact = alarm active. Delay: see parameter A7
3	E	nabling of defrost Open contact = defrost not enabled
4	S	tart of defrost Defrost is activated when the contact closes.
5	D	oor switch Open contact = open door. When the door is openthe compressor, the evaporator fans and the displaystart to flash; the light is activated and the temperaturealarms are deactivated.After an interval of time that can be selected (d8), thebuzzer begins to sound and the controller start thenormal operation (fan on and compressor on at theoccurance)
6	Remote On-Off		Closed contact = ON. This causes the deactivation ofthe button on the frontal part of the instrument.Whenthe control is off, the temperature is displayed, theprotections of the compressor are kept, the LIGHTbutton keeps working.
7	C	urtain switch Contact close = curtain down.With r4=3.0 (value(pre-programmed) the Set Point is increased of3 degrees with respect to the used value with opencurtain. If the auxiliary output is used for lightsmanagement, the curtain down switches automaticallyoff the lights while the curtain up switches it on.

4.4.1 Duty setting selection (parameters c4 and A6)

If the control probe alarm (E0 flashing) is activated, the parameter c4 allows the compressor to function:

• c4=value between 1 and 99: sets the compressor On-time (expressed in minutes), followed by a fixed Off-time equal to 15 min;
• c4=0: compressor always Off;
• c4=100: compressor always On.

If an external alarm (IA or dA flashing) is activated on the digital input (A4=1; A4=2), the parameter A6 allows the compressor to function:

• A6= value between 1 and 99: sets the compressor On-time (expressed in minutes), followed by a fixed Off-time equal to 15 min;
• A6=0: compressor always Off;
• A6=100: compressor always On.

4.5 Table of the parameters

Parameter Type Min Max U.M. Def

PAPASSWORD C 00 +199 - 22
/	P	ROBE PARAMETERS
/C	Ambient probe calibration F -20	+20 °C/°F	0.0
/2	Measurement stability		C 1	15 - 4
/3	Probe reading speed		C 1	15 - 8
/4	Probes average (see installation manual)		C	0	100	-
/5	°C /°F (0=°C, 1=°F)		C	0	1	flag
/6	Enabling of decimal point (0=yes, 1=no)		C	0	1	flag
r	CONTROL PARAMETERS
rd	Control differential (hysteresis)		F	0.1	+19.9	°C/°F
r1	Minimum set allowed		C	-50	r2	°C/°F
r2	Maximum set allowed		C	r1	+199	°C/°F
r3	Enabling of Ed alarm defrost interrupted because max.duration has been reached, param. DP; (0=no, 1=yes)		C	0	1	flag
r4	Automatic Set Point variation during night functioning (that iswhen the curtain switch is closed, with either A4 or A5=7)		C	0	+20	°C/°F
r5	Enabling of min./max. temp. monitoring (0=no, 1=yes)		C	0	1	flag
rt	Actual interval in max./min. temperature reading		F	0	199	hours
rH	Maximum temperature read in the rt interval		F	-	-	°C/°F
rL	Minimum temperature read in the rt interval		F	-	-	°C/°F
c COMPRESSOR PARAMETERS
c0	Compressor start-up delay after unit start-up		C	0	15	min
c1	Minimum interval between two compressor start-up		C	0	15	min
c2	Minimum compressor off-time		C	0	15	min
c3	Minimum compressor on-time		C	0	15	min
c4	Relay safety (0=OFF, 100=ON). See Duty setting		C	0	100	min
cc	Duration of continuous cycle		C	0	15	hours
c6	Alarm cut-out after continuous cycle		C	0	15	hours
d	DEFROST PARAMETERS
d0	Type of defrost (0=heat.,1=hot gas, 2=water/res. time,3=gas time)		C	0	3	flag
dl	Interval between two defrost phases		F	0	199	hours
dt	End defrost temperature set		F	-50	+199	°C/°F
dP	Maximum duration of defrost or real duration for d0=2 or 3		F	1	199	min
d4	Defrost on unit start-up (0=no,1=yes)		C	0	1	flag
d5	Defrost delay after unit start-up or digital input (A4 or A5 =4)		C	0	199	min
d6	Display override during defrost (0=no,1=yes)		C	0	1	flag
dd	Dripping time after defrost		F	0	15	min
d8	Duration of alarm cut-out after defrost and,if A4 or A5=5, after door opening		F	0	15	hours
d9	Defrost has priority over compressor protection (0=no,1=yes)		C	0	1	flag
d/	Defrost temperature probe reading		F	-	-	°C/°F
dC	Time basis (0=hours/min,1=min/s) only for dl and dP		C	0	1	flag
A	ALARM PARAMETERS
A0	Alarm and fan differential		C	0.1	+20	°C/°F
AL	Low temperature alarm (indicates the max. alloweddeviation from the set-point). AL=0 disabled lowtemperature alarm		F	0	+199	°C/°F

A A LARM PARAMETERS

AH High temperature alarm (indicates the max. allowed F 0 +199 °C/°F 0 deviation from the Set Point). AH=0 disabled high temperature alarm
Ad Temperature alarm delay C 0 199 min 120
A4 Digital input n.1 configuration C 0 7 - 0
A5	Digital input n.2 configuration	C 0 7 - 0
A6	Cut-out of compressor by external alarm:0=OFF,100=ON. Enabled if either A4 or A5 is 1 or 2.See Duty setting and digital input	C	0	100	min	0
A7	Delay in registration of the input “delayed alarm”(A4 or A5=2)	C	0	199	min	0
F	FAN PARAMETERS
F0	Management of fans: 0=always activated except on specific phases (see parameters F2, F3, and Fd)1=controlled by a thermostat according to the difference between ambient temp. and evaporator temperature2=controlled by a thermostat according to the evaporator temperature	C	0	2	flag	0
F1	Fans ON Set-Point: F0=1 fans activated if evap. T. < (ambient T - F1-A0) and OFF if evap. T. > (ambient T. - F1)F0=2 fans ON if evap. T. < (F1-A0); and OFF with evap. T. > F1	F	-50	199	°C/°F	5
F2	Stop fans when compressor is Off (0=no,1=yes). Active if F0=0	C	0	1	flag	1
F3	Stop fans during defrost (0=no,1=yes).Active for any value of F0	C	0	1	flag	1
Fd	Stop after dripping. Active for any value of F0	F	0	15	min	1
H	OTHER SETTINGS
H0 Address within network		C 0 15	- 1
H1 Selection of relay 4 functioning:0=auxiliary output1=alarm: normally de-energised relay2=alarm: normally energised relay		C 0 1 flag 0
H2	0=buttons inhibited; 2=buttons & IR inhibited; 3=IR inhibited	C	0	3	flag	1
H3	Code to enable remote programming	C	00	199	-	00
H4 1=disabled buzzer		C 0 1 flag 0

Warning:

1. for parameters indicated with a grey-shaded background, it is recommended to check before installing if the default values are suitable for the required use.
2. for the set times to become operative, the instrument must be switched OFF and ON again.
3. on MTCA models the following values have to be assigned to the next parameters:
4. r3: must be 0
5. d0: 2 or 3 (default: d0= 2)
6. dt: irrilevant
7. dl: 0.

For a more detailed information on parameters, please refer to the IR32 refrigeration manual (+030220170).

5. Alarms, signalling and troubleshooting

In the following table you can find the most frequent causes for any operation anomaly and some suggested explanations and /or solutions to it.

Display Cause Check
Flashing LED	Actuator set delay	Insertion of the relative function is delayed for a period while awaiting an external signal or while held up by another process still in progress.
Temperature flashing door open	Door switch broken or	Close the door or check the door switch.
Temperature flashing and longer than d8 parameter buzzer ON	Door open for a period of time	Check the door status and the value of the parameter d8
Flashing E0	Control probe error	Probe not compatible with the equipment; probe cable interrupted or short circuit. Faulty sensor: disconnect the probe from the instrument and measure the resistance (NTC: 0°C=27KΩ).
Flashing E1	Evaporator probe error	Probe not compatible with the equipment; probe cable interrupted or short circuit. Faulty sensor: disconnect the probe from the instrument and measure the resistance (NTC: 0°C=27KΩ).
Flashing IA	Alarm from digital input	Check Multi-function inputs and parameters A4 and A5.
Flashing dA	Delayed alarm from digital input	Check Multi-function inputs and parameters A4, A5 and A7.
Flashing LO	Low temperature alarm (temp. lower than SET - AL - A0)	Check param.s AL, Ad and A0. The alarm will cease as soon as the temp. returns within the limits selected.
Flashing HI	High temperature alarm (temp higher than SET + AH + A0)	Check param.s AH, Ad and A0. The alarm will cease as soon as the temp. returns within the limits selected.
EA, EB, EE	Data acquisition error. RESET procedure (for mod. MTCA* see point 3 of the Warning chapter 4.5)	In order to restore normal working conditions, reset the default value of the param.s, using this procedure:• turn off the control;• pressing the button and, keeping it pressed, turn on the controller;• the display shows “-c-”; release the PRG button;• after a few seconds, the instrument enters the RESET procedure and allows the modification of parameters;• should EE persist, press the button until the the message disappears. If the error persists, it is necessary to replace the instrument.Any modification made before the reset procedure will be lost
Flashing Ed	Defrost end by timeout	• Check parameters dt, dP and d4.• Check if the defrost was done.• if neces. inhibit the Ed alarm through the r3 par.
Flashing dF	Defrosting in progress	This is not an alarm signal, but it indic. that the instr. is carrying out a defrost. Appears only if par. d6=0.

6. Technical specifications

6.1 General characteristics

operating conditions 0÷50°C, 20÷80% r.H.

storage conditions -30÷70°C, 20÷80% r.H.

environmental pollution normal

period of stress across the insulating parts long

PTI of the insulating materials 250V

Class of insulation Class II

immunity against voltage surges Category 1

index of protection IP65

parameter modification from keypad, from remote control

software class and structure Class A

display 2 and a half digits

category of resistance to fire and heat category D

number of automatic operating cycles 100.000

type of action-disconnection 1B

signal lights ON, compressor, continuous cycle, defrost, fan, light

6.2 Electrical specifications

power supply	230Vac, +10% -15%, 50/60Hz
rated consumption	7VA
terminal block	screw terminals for cables, cross-section: max 1.5mm^2 and min 0.5mm^2

Serial connection using MTCSER0000 serial board to Carel RS485 supervisory systems

6.2.1 Inputs

type	2 free, not optically-isolated digital contacts (configurable)
	• cold room temperature probe (Carel NTC 10kΩ at 25°C)
	• defrost temperature probe (Carel NTC 10kΩ at 25°C)
measurement (control) interval	-50T50 (-50÷50°C, -58÷+122°F)
precision	±1°C
resolution	0.1°C (0.1°F) between -19.9 and 19.9
	1°C (1 °F) in the rest of the field

6.2.2 Outputs

If the outputs supply loads other than those described in the table, contact the manufacturer Carel.

model	MTCA000100	MTCD000100	MTCD200100
relay outputs	all with 1B type action, according to ECC EN 60730-1
compressor	SPST relay, 8(2)A / 250Vac		SPST relay, 10(10)A / 250Vac
defrost	not available	SPST relay, 10(4)A / 250Vac
fans	not available	SPST relay, 4(2)A / 250Vac
light/aux output	SPST relay, 4(4)A / 250Vac
alarm output	SPDT relay, 2(2)A / 250Vac

6.3 Mechanical characteristics

mounting panel or wall

containers plastic self-extinguishing (according to UL94-V0)

dimensions (mm) 190x160x65

probe response time in still air (s) 70s

6.4 Dimensions (mm):

CAREL Master Cella compact SET MasterCella 190

65 160

Fig. 6.4.1

Dima di foratura Drilling template 182 x 153 mm

Fig. 6.4.2

Carel reserves the right to modify the features of its products without prior notice.

F

INSTRUCTIONS IMPORTANTES

AVANT D'INSTALLER OU D'INTERVENIR SUR L'APPAREIL, LIRE ATTENTIVEMENT ET SUIVRE LES INSTRUCTIONS CONTENUES DANS CE MANUEL.

Master Cella compact SET i h MasterCella d e l a b c

Fig. 1.2.1

1.3 Installation murale

3.5 Allumage/Extinction lumière

A P ARAMETRES D'ALARME

ANWEISUNGEN LESEN UND AUFBEWAHREN READ AND SAVE THESE INSTRUCTIONS

CAREL Master Cella compact i h SET MasterCella d e l a b

Abb. 1.2.1

1.3 Wandmontage

Detrás / Rear Junta Gasket CAREL MasterCella MasterCella Frontal / Front

Fig. 1.1.1

CAREL Master Cella compact SET i h MasterCella d e l c a b

Fig. 1.2.1

① ② ③ prg SET ④ 5 6

Fig. 2.1

CAREL Master Cella compact 200 SET MasterCella 190

65 160

Fig. 6.4.1

Medida de corte Drilling template 182 x 153 mm

Fig. 6.4.2