MPK-12EEN2 - Air-conditioner MIDEA - Free user manual and instructions

USER MANUAL MPK-12EEN2 MIDEA

Room Air conditioner

Service manual

CAUTION

• BEFORE SERVICING THE UNIT, READ THE SAFETY
• PRECAUTIONS IN THIS MANUAL.
• ONLY FOR AUTHORIZED SERVICE PERSONNEL.

MODELS:	MPK-09CEN2	MPK-09CRN2	MPK-09EEN2	MPK-09ERN2
	MPK-10CEN2	MPK-10CRN2	MPK-10EEN2	MPK-10ERN2
	MPK-12CEN2	MPK-12CRN2	MPK-12EEN2	MPK-12ERN2
	MPK-08CE	MPK-08CR	MPK-08EE	MPK-08ER
	MPK-09CE	MPK-09CR	MPK-09EE	MPK-09ER
	MPK-10CE	MPK-10CR	MPK-10EE	MPK-10ER

CONTENTS

1. PREFACE

1.1 SAFETY PRECAUTIONS....1
1.2 INSULATION RESISTANCE TEST....1
1.3 FEATURES....1
1.4 CONTROL LOCATIONS....2

2. TROUBLE SHOOTING GUIDE

2.1 REFRIGERATION CYCLE DIAGRAM....3
2.2 ELECTRIC FUNCTION....3
2.3 TROUBLE SHOOTING GUIDE....5

3. WIRING DIAGRAM

3.1 WIRING DIAGRAM FOR COOLING ONLY MODELS....8
3.2 WIRING DIAGRAM FOR COOLING AND HEATING MODELS....8
3.3 ELECTRICAL CONTROL SCHEME....9
3.4 MAIN CONTROL BOARD SCHEME....10
3.5 DISPLAY BOARD SCHEME....11
4. HOW TO DISASSEMBLE THE UNIT....12
5. EXPLODED VIEWS....19
6. SPARE PARTS LIST....19
7. SPECIFICATIONS....19

1. PREFACE

This SERVICE MANUAL provides various servicing information, including the mechanical and electrical parts, etc. This room air conditioner was manufactured and assembled under a strict quality control system.

The refrigerant was charged at the factory. Be sure to read the safety precautions prior to servicing the unit.

1.1 SAFETY PRECAUTIONS

1. When servicing the unit, set the POWER SWITCH to OFF and unplug the power cord.
2. Inspect the service cord for damage or wear.

If a short circuit is found, replace all parts which have been overheated or damaged by the short circuit.

1. After servicing the unit, make an insulation resistance test to protect the customer from being exposed to shock hazards.

1. Unplug the power cord and connect a jumper lead between the two (2) live pins.
2. The grounding conductor (yellow/green) is to be open.
3. Measure the resistance value with an ohm meter between the jumped lead and each exposed metallic part on the equipment at all the positions (except OFF) of the ROTARY SWITCH or POWER SWITCH.
4. The value should be over 1MΩ.

1.3 FEATURES

Water full alarm

Anti-icing function at cooling mode.

Restart relay protection for the compressor.

Temperature sensor err self-diagnose.

24 hours on/off mode time setting.

Both temperature mode display

Separate motor for indoor and outdoor system.

Multiple uses: dehumidifying and cloth drying.

Low temperature Drying operation.

There are four casters on the bottom for easy movement.

Only one exhaust pipe, which makes the A/C easier to use.

1.4 CONTROL LOCATIONS

For cooling only with electric heater models:

Control panel interface with icons and a display panel showing various function buttons and symbols

For cooling only models:

Diagram of a control panel with labeled buttons and display screen, showing various function icons and symbols.

SET TEMPERATURE(°C/F ) AUTO COOL DRY HEAT FAN HIGH MED LOW TEMP MODE ON/OFF TIMER ON FAN SPEED TIMER OFF RESET LOCK

Remote receiver.

Timer ON button. Push this button to set the

Remote-controlled or gentle-touch keys for easy and comfortable use.

Compressors of famous brands are adopted for reliability and low noise.

The heating system uses PTC electrical heater and will not be affected by ambient temperature, which saves energy.

Suitable for local cooling and heating.

Condenser shower and large volume tank design.

Timer OFF button. Push this button to set the Timer Off time.

Timer ON/OFF lamp.

°F Fahrenheit temperature display. When Fahrenheit temperature display mode is selected.

°C Celsius temperature display. When Celsius temperature display mode is selected.

Temperature setting up. Push this button to set temperature setting up.

Temperature setting down. Push this button to set temperature setting down.

Cooling operation lamp.

Drying operation lamp.

Fan only operation lamp.

Electric heating operation lamp.

Mode setting button. Push this button to select the operation mode: Cool, Dry, Fan only and Heat

Fan speed setting button. Push this button to select fan speed: High, Med and Low.

Power button. Push this button to start the unit.

Water full alarm lamp

Power lamp

Remote controller:

LCD display.

Mode button: Select the operation mode, AUTO, COOL, DRY, HEAT (cooling only with electric heater models only) and FAN.

Fan speed button: Select the Fan speed, AUTO, LOW, MED, HIGH.

ON/OFF button: Press this button to operation the unit, again to stop.

Temperature setting up button: Press this button to increase temperature setting or adjust the TIMER in a

clockwise direction.

Temperature setting down button: Press this button to decrease temperature setting or adjust the TIMER in a counter-clockwise direction.

Timer on button: Push this button to set the ON timer.

Timer off button: Push this button to set the OFF timer.

Lock button: Press this button to lock all button except this button.

Reset button: Press this button to reset all settings to factory settings.

2 TROUBLESHOOTING GUIDE

2.1 REFRIGERATION CYCLE DIAGRAM

graph LR
    A["HEAT EXCHANGE (EVAPORATOR)"] --> B["LICID SIDE VALVE"]
    B --> C["CAPILLARY TUBE"]
    C --> D["HEAT EXCHANGE (CONDENSER)"]
    D --> E["COMPRESSOR"]
    E --> F["GAS SIDE VALVE"]
    F --> A
    style A fill:#f9f,stroke:#333
    style D fill:#f9f,stroke:#333
    style E fill:#ccf,stroke:#333

2.2 ELECTRICAL FUNCTION

2.2.1 Electric Control working environment

2.2.1.1 Input voltage: 187\~264V for 50Hz models and 97\~127V for 60Hz models;

2.2.1.2 Input power frequency: 50Hz or 60Hz;

2.2.1.3 Ambient temperature: -7^ +43^ for cooling only with electric heater models and 10^ +43^ for cooling only models;

2.2.1.4 Indoor fan normal working amp is less than 1A;

2.2.1.5 Outdoor fan. Normal working amp is less than 1.5A;

2.2.1.6 Compressor: single-phase power supply. Its normal working amp is less than 10A;

2.2.2 Proper symbols and their meanings:

TA: Indoor ambient temperature

TC: Indoor evaporator temperature

TS: Setting temperature through the remote controller

2.2.3 Systematic functions

Remote receiving (Optional)

LED displaying and alarm

On or off Timer

Protection for the compressor

Water full alarm

Anti-icing function at cooling mode.

Temperature sensor err self-diagnose.

Both temperature mode display

2.2.4 Protection

2.2.4.1 The compressor functions protection with a delay of three minutes.

2.2.4.2 Sensor protection at open or short circuit.

2.2.4.3 Evaporator anti-icing protection at cooling mode.

2.2.4.4 Water full alarm

There are two water position switches used in the unit. One detects the water depth in the chassis and the other detects the water in the tank.

2.2.4.4.1 Water full alarm will be on when the unit is standing by or operating.

2.2.4.4.2 When the water adds up to the first position on the chassis, the pump will be activated. If the water drops down through the position, the pump will be on and stop after 2 minutes.

2.2.4.4.3 When the water adds up to the position on the tank, the compressor, outdoor fan motor, electric heater and pump will stop operation. And the LED will display "P1" while the water full lamp flashes at 2Hz.

2.2.4.4.4 When the water adds up to the second position on the chassis and the switch has been on for 10 seconds, the whole unit will stop operation. The LED will display "P2" and the water full lamp will flash at 5Hz. After you have clear the problem, you should unplug the unit and plug again. Then the unit will be ready to operate.

2.2.4.4.5 When the unit is standing by, if the unit displays "P1", the pump will not operate. After the problem is cleared, the unit will be ready to operate. But if you push the power button, the unit will shut the "P1" display and shut down.

2.2.5 Fan-only Mode Function Requirement

2.2.5.1 The compressor and outdoor fan are OFF at Fan-only mode.

2.2.5.2 The speed of indoor fan can be optionally

chosen as High/Mid/Low.

2.2.6 Cooling Mode Function Requirement

2.2.6.1 The speed of indoor fan can be optionally selected as High/Mid/Low.

2.2.6.2 The compressor operate as:

°C room temperature (TA) Compressor ON TS+1 TS Compressor OFF Temp up Temp down

2.2.7 Drying mode

2.2.7.1 When the unit starts to operate in Drying mode, the compressor will start while the room temperature is over 13^ C. After the compressor started, the compressor will operate as:

°C room temperature (TA) 15°C 13°C Compressor and outdoor fan ON Compressor and outdoor fan OFF Temp up Temp down

2.2.7.2 The indoor fan will operate with high speed. The outdoor fan will operate with compressor.

2.2.8 Heating mode

2.2.8.1 The speed of indoor fan can be optionally chosen as High/Mid/Low.

2.2.8.2 Electric heater operate as :

°C room temperature (TA) Electric heater OFF TS+1 TS Electric heater ON Tempup Temp down

2.2.9 Temperature display

2.2.9.1 The setting temperature will be displayed in Cooling and Heating mode. The room temperature will be displayed in Drying and Fan only mode.

2.2.9.2 The setting temperature range is from 17^ C to 30^ C or 62^ F to 88^ F. The display temperature range is from 10^ C to 35^ C or 48^ F to 98^ F. If the room temperature is lower than 10^ C or 48^ F, the display will be 10^ C or

48^

2.2.10 Timer Function
2.2.10.1 The maximum length of Timer is 24 hours and the minimum is 0.5 hours.
2.2.10.2 TIMER ON function: first turn OFF the unit, the unit will be automatically ON at the set time.
2.2.10.3 TIMER OFF function: first turn ON the unit, the unit will be automatically OFF at the set time.
2.2.10.4 TIMER ON/OFF function (ON TIMER is earlier than OFF TIMER): first turn OFF the unit, it will be automatically ON at set time,

and later be OFF at the set time.

2.2.10.5 TIMER OFF/ON function (OFF TIMER is earlier than ON TIMER): first turn ON the unit, it will be automatically OFF at set time, and later be ON at the set time.
2.2.10.6 Timer function execution is applicable upon one operation only.
2.2.10.7 Timer precision is less than 15 minutes.
2.2.11 Auto restart function In case of a sudden power failure, this function automatically sets the unit to previous settings before the power failure when power returns.

2.3 TROUBLESHOOTING GUIDE

In general, possible trouble is classified in three kinds. One is called Starting Failure which is caused from an electrical defect, another is ineffective Air Conditioning caused by a defect in the refrigeration circuit and improper application, and the other is called the Structure Damage.

ROOM AIRCONDITIONER VOLTAGE LIMITS:

NAMEPLATE RATING	MINIMUM	MAXIMUM
220~240V	196V	253V
115V	103V	122V

PROBLEM	POSSIBLE CAUSE	REMEDY
No power display on panel or any one of the buttons failure.	Power failure	Check the power supplier if the power supplier is supplied to the unit. Check the power cord and correct if damaged.
	Transformer (Discharge transformer before testing)	Check resistance between the two input/output lines on transformer. Replace the transformer if either of the input/output is open or the transformer is damaged.
	Display board or main PCB failure	Check the voltage on display board. Replace the display board if it is +5V else replace the main PCB.
Remote control failure.	Battery failure	Check the voltage of battery. Replace batteries if the voltage is lower than 2.3V.
Fan motor runs intermittently	Cycles on overload.	Check voltage. Call an electrician if not within limits.
		Test capacitor.Replace if not within +/-10% of manufacture's rating.
		Check bearings. Replace the motor if the blower wheel cannot rotate freely.
		Pay attention to any change from high speed to low speed.Replace the motor if the speed does not change.
Compressor stops instantly after startup.	RefrigerantCompressor	The amount of the refrigerant is too much, making the compressor load too big. Recycle and recharge the refrigerant after checking for the reason.The compressor is blocked inside. Replace after checking for the reason.
Fan motor will not run.	No power	Check voltage at electrical outlet. Correct if none.
	Water alarm	Check and correct if water alarm happens.
	Power supply cord	Check voltage at the power cord terminal on Main PCB. Replace the power cord if none.
	Transformer (Discharge transformer before testing)	Check resistance between the two input/output lines on transformer. Replace the transformer if either of the input/output is open or the transformer is damaged.
	Wire disconnected or connection loose	Connect wire. Refer to wiring diagram for terminal identification. Repair or replace loose terminal.
	Main PCB failure	Select fan speed and Check the voltage on main PCB. Replace the main PCB if no voltage in anyone.
	Capacitor (Discharge capacitor before testing)	Test capacitor. Replace if not within +/-10% of manufacture's rating. Replace if shorted, open or damaged.
	Will not rotate	Fan blower hitting scroll. Realign assembly. Check fan motor bearings. Replace the motor if motor shaft do not rotate.
Fan motor noise.	Fan blower	Replace the fan blower if cracked, out of balance, or partially missing.
	Loose screws	Tighten them.
	Worn bearings	Replace the motor if knocking sounds continue when running or loose, or the motor hums or noise appears to be internal while running.
Compressor will not run while fan motor runs.	Voltage	Check voltage. Call Supply Authority if not within limits.
	Wiring	Check the wire connections, if loose, repair or replace the terminal. If wires are off, refer to wiring diagram for identification, and replace. Check wire locations. If not per wiring diagram, correct.
	Main PCB failure	Check voltage of main PCB. Replace the main PCB if open.
	Capacitor (Discharge capacitor before testing)	Check the capacitor. Replace if not within +/-10% of manufacturers rating. Replace if shorted, open, or damaged.
	Room temp sensor	Check the temperature setting if not at the coolest (in cooling mode) or the warmest (in heating mode). Set it if not.
	Compressor	Check the compressor for open circuit or ground. If open or grounded, replace the compressor.
Excessive noise.	Copper tubing	Remove the cabinet and carefully rearrange tubing not to contact cabinet, compressor, shroud and barrier.
Water full alarm	Water tank full	Check and pour if the water tank is full.
	Water depth sensor if failure	Check and replace if failure.
	Water pump failure	Check and replace if the pump if failure.
	Water depth is over load in chassis	Check and drainage the water in the chassis by open the drainage hose on the chassis.
	Water depth sensing structure	Check and replace or realign if the structure is failure.
Cooling or heating feels not good	Air filter	Clean or replace if restricted.
	Air discharge pipe	Realign and assemble if the installation of the air discharging pipe failure. Replace if damaged.
	Unit undersized	Determine if the unit is properly sized for the area to be cooled or heated.
	Condenser and Evaporator	Clean or replace if restricted.
	Water shower failure	Check the structure of water showering system and clean if blocked.
	Fan motor	Check the fan capacitor and replace if not within +/-10% of manufactures rating.
	Air flow	Clean or remove if any barrier is found to block the inlet/outlet wind flow of the unit.
	Less refrigerant	Check the tubes for reasons of leakage. Recycle the refrigerant, correct the leakage points and recharge.
	Capillary tube	Regulate the flow if capillary tube and make the evaporating temperature appropriate if the evaporator is frosted. Replace if blocked. Repair joint if leaking.
	Compressor	The inlet and outlet valve of the compressor is damaged, making the low pressure connected with the high pressure. The refrigerating system can not produce high pressure and low pressure. Replace the compressor after checking for the reason.
	Heat sources	Reduce if too many.
No cooling or heating.	No power	Check the voltage. Call an electrician if no within the limit.
	Wiring	Check the terminals. Repair and correct if loose.
	Temperature setting	Check and adjust the temperature setting.
	Mode setting	Check and adjust the mode setting.
	Compressor	Check and replace if the compressor, the over-load protector or wiring is broken.
	Electric heater failure	Check and replace if the heater is damaged.
	Over heat fuse failure	Check and replace if the fuse is damaged.
	Main PCB	Check the voltage of main PCB. Replace the main PCB when the unit failure in heating mode.
The unit starts and stops frequently.	Power supply	The input power supply voltage is too low. Call an electrician if not within limits.
	Main PCB	Check and replace the main PCB if the compressor relay on PCB is shorted or damaged.
	Room temperature	When the room temperature is too high, the compressor will protect.

3 WIRING DIAGRAM

3.1 FOR COOLING ONLY MODELS:

MPK-09CEN2	MPK-09CRN2	MPK-08CE	MPK-08CR
MPK-10CEN2	MPK-10CRN2	MPK-09CE	MPK-09CR
MPK-12CEN2	MPK-12CRN2	MPK-10CE	MPK-10CR

AMIENT TEMP. SHIOR H. Z. THIP. SHIOR BLACK BLACK FAN CAPACITOR BLACK TAXTURE MOTOR2 BLTF PUMP MOTOR BLTF BLTF PUMP CAPACITOR BLACK BLACK BLTF BLTF BLTF BLTF BLTF BLTF BLTF BLTF BLTF BLTF BLTF BLTF BLTF BLTF BLTF BLTF BLTF BLTF BLTF BLTF BLTF BLTF BLTF BLTF BLTF BLTF BLTF BLTF BLTF BLTF BLTF BLTF BLTF BLTF

3.2 FOR COOLING AND HEATING MODELS:

MPK-09EEN2	MPK-09ERN2	MPK-08EE	MPK-08ER
MPK-10EEN2	MPK-10ERN2	MPK-09EE	MPK-09ER
MPK-12EEN2	MPK-12ERN2	MPK-10EE	MPK-10ER

graph TD
    A["AMBIENT TEMP. SENSOR I H.E. TEMP. SENSOR"] -->|2| B["BLACK BLACK"]
    A -->|2| C["CH4"]
    D["THERMOSTAT"] --> E["FAN CAPACITOR"]
    E --> F["DOWN-FAN MOTOR"]
    F --> G["PUMP MOTOR"]
    G --> H["BROWN"]
    I["THERMAL FUSE"] --> J["BLUE"]
    J --> K["CN7"]
    K --> L["CN2"]
    L --> M["P6"]
    N["CONTROL BOARD"] --> O["RYS"]
    O --> P["RED"]
    P --> Q["P7"]
    Q --> R["RYS"]
    R --> S["RED"]
    S --> T["CN3"]
    U["BLE"] --> V["BROWN BLACK CAPACITOR"]
    V --> W["BLUE COMP 2"]
    W --> X["YS0 GREEN"]
    X --> Y["PUM-H"]
    Y --> Z["BLACK"]
    Z --> AA["YS0"]
    AB["UP-FAN MOTOR"] --> AC["FAN CAPACITOR"]
    AC --> AD["BLACK BLACK"]
    AC --> AE["YS0"]
    AF["DISPLAY BOARD"] --> AG["CN8"]
    AG --> AH["CN5"]
    AH --> AI["GREEN SWITCH"]
    AI --> AJ["PUMP SWITCH"]
    AJ --> AK["WHITE SWITCH"]
    AL["BLUE"] --> AM["BLUE WHITE"]
    AM --> AN["BRIN13 Black CAPACITOR"]

3.3 ELECTRICAL CONTROL SCHEME:

机型 CE-KCD30/Y1-K电路原理图图纸[控制V1.0 2004.5.6] SCH 日期 2004.05.06 版本号 V1.0 张次 1 / 1 设计 卢慧奇 标准 鲍默生 美的空调事业部 威创科技有限公司 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180

3.4 MAIN CONTROL BOARD SCHEME:

CAUTION ZR1 C5 RIVER N OUT FAN PUMF LDO MLD R1 R2 R3 R4 R5 R6 R7 R8 R9 R10 R11 R12 R13 R14 R15 R16 R17 R18 R19 R20 R21 R22 R23 R24 R25 R26 R27 R28 R29 R30 R31 R32 R33 R34 R35 R36 R37 R38 R39 R40 R41 R42 R43 R44 R45 R46 R47 R48 R49 R50 R51 R52 R53 R54 R55 R56 R57 R58 R59 R60 R61 R62 R63 R64 R65 R66 R67 R68 R69 R70 R71 R72 R73 R74 R75 R76 R77 R78 R79 R80 R81 R82 R83 R84 R85 R86 R87 R88 R89 R90 R91 R92 R93 R94 R95 R96 R97 R98 R99 CAUTION

3.5 DISPLAY BOARD SCHEME:

Color-coded printed circuit board with various components and traces (no readable text or symbols)

4 HOW TO DISASSEMBLE THE UNIT

4.1 Prepare the unit.

Unplug the power cord and disconnect the Air pipe from rear of the unit.

White portable air conditioner unit with ventilation grille and ventilation duct (no visible text or labels)

Move the unit to a replace where water can be poured. Remove the rubber plug from back of the unit and drainage the water in from the unit.

Diagram of a mechanical assembly with a red circle highlighting a component, no visible text or symbols

Remove the water tank from the unit and pour the water in the tank.

Close-up of a white electronic device with a small rectangular component inserted, placed on a textured surface (no visible text or symbols)

4.2 Remove the screws which fixed the rear panel.

Close-up of a white air conditioner unit with visible cooling fins and ventilation grille (no text or symbols)

Illustration of a blue and brown industrial air conditioner unit with orange panel panels and control panel (no text or symbols)

Close-up of a mechanical component with a threaded rod inserted, showing internal structure and mounting holes (no text or symbols visible)

Close-up of a hand opening a white panel on a white rack, with no visible text or symbols.

Remember to disassemble the inlet grille.

Close-up of a white air conditioner unit with visible cooling fins and ventilation slots (no text or symbols)

Take care to the indoor temperature sensor attached on the rear board. And be care to the power cord which got through the rear panel.

Close-up of a white electronic device with a black cable and a red circle highlighting a component (no visible text or symbols)

4.3 To disassemble the display board assembly, just push the clasp and release the assembly.

Close-up of network cables and connectors in a server room (no visible text or symbols)

Close-up of a remote control panel with visible ports and wiring (no text or symbols)

Now it is easy to replace the display board. Take care to release the connector which connected to the display board.

Interior view of an electronic device showing exposed wiring and components, with red circles highlighting specific areas (no text or symbols visible)

4.4 To disassemble the front panel. Remove the screws fixing the front panel.

Screws fix the front panel from side of the unit.

Close-up of a white industrial cooling unit with copper heating elements and blue insulation (no visible text or symbols)

Screws on front bottom of the unit.

3D rendered interior view of a vehicle or game engine with multiple colored buttons and control panels (no visible text or symbols)

Screw locates on top of tank box.

Close-up of a mechanical component with a red circle highlighting a small feature, no visible text or symbols

Screw locates on bottom of chassis.

Close-up of a white electronic device with a red circle highlighting a small component, no visible text or symbols.

Be care to release the connectors which connect to the display board.

Interior view of an open electronic device with exposed wiring and components (no visible text or symbols)

4.5 To replace the Main Control board.

Remove the screws fixing the enclosure cover.

Close-up of a metallic industrial machine with two red-circled annotations pointing to a small component (no visible text or symbols)

Take care of the wiring diagram on the cover. The wiring diagram is important for reference when wiring.

Close-up of a mechanical component with a yellow circular component and a printed label showing technical diagrams.

Pay attention to the wires in the enclosure.

Electrical equipment setup with motor, wires, and a blue cylindrical component (no visible text or symbols)

Close-up of electrical wiring with multicolored wires and connectors (no visible text or symbols)

Electronic circuit board with various components and wires, no visible text or symbols

1 2 3 4 5 6 7 8 9 10

1: Terminate to display board
2: Terminate to condenser fan motor
3: Out-put of transformer
4: Terminate to evaporator fan motor
5: Terminate to compressor
6: Terminates (N) to condenser fan motor, electric heater, pump, power cord, compressor capacitor
7: Terminate to electric heater
8: Terminate (L) to power cord
9: Terminate (L) to pump
10: Terminate to input of transformer Take care to the grounding wires if need to disconnect.

Close-up of electronic components including wires and a probe, no visible text or symbols

4.7 To replace the evaporator fan motor or electric heater

To disassemble the air-out frame. Remove the screws fixing the air-out frame. Lift the frame up then pull the frame forward.

Close-up of a metallic mechanical component with two red-circled features and a central hole (no visible text or symbols)

Close-up of a black cylindrical device with two red-circled points, possibly indicating inspection or damage (no visible text or symbols)

Remove the screws fixing the fan shell box.

Close-up of a mechanical component with red circles highlighting two areas of interest (no visible text or symbols)

Close-up of a white electronic device with wires and a red circle highlighting a small component (no visible text or symbols)

Remove the fan motor, fan scroll and blower wheel from the unit.

Industrial fan with blue filter and metal casing, no visible text or symbols

Take care to the wires for electric heater.

Close-up of a kitchen appliance with a red circle highlighting a small object, no visible text or symbols

Slide the electric heater bracket up and remove the parts from the unit.

Black rectangular device with circular vent and internal striped pattern, placed on a white surface with wires and a small circular component (no visible text or symbols)

Interior view of a refrigerator with cooling fins and wiring, no visible text or symbols

Now, it is easy to replace the electric heater and/or heat protector attached with the heater.

4.8 To replace the condenser fan motor Remove the screws fixing the evaporator

Close-up of a mechanical component with copper coil and a red circle highlighting a small feature (no visible text or symbols)

Remove the screws fixing the condenser fan motor bracket.

Close-up of a mechanical component with red circles highlighting four circular features (no text or symbols visible)

Then remove the bracket with condenser fan motor and blower wheel from the unit.

Close-up of a white electronic device with copper wires and a metallic panel, no visible text or symbols

Close-up of a white plastic electronic component with visible internal structure and wiring (no text or symbols)

4.9 To repair the refrigerant system or replace the compressor

Disconnect the water pipe below.

Close-up of a white plastic mechanical component with a hand adjusting it, showing internal structure and wiring (no visible text or symbols)

Remove the screws fixing the condenser fan scroll.

Close-up of a mechanical component with two red-circled features (no visible text or symbols)

Close-up of a mechanical component with two red-circled annotations highlighting features (no readable text or symbols)

Close-up of a mechanical component with a red circle highlighting a small feature, no visible text or symbols.

Close-up of a mechanical component with two red-circled features and a small golden object on the surface (no visible text or symbols)

Close-up of a white mechanical component with a red circle highlighting a small feature, no visible text or symbols.

Remove the water pipe from the cover.

Close-up of a mechanical component with a red circle highlighting a specific area (no visible text or symbols)

Then, remove the condenser fan scroll.

Interior view of a white industrial machine with visible internal components and wiring (no text or symbols)

Now, it is easy to repair the refrigerant system.

Interior view of an appliance showing coiled heating pipes, a white electrical box, and wiring (no visible text or symbols)

4.10 To repair the water disposal system or replace the water depth switch or the pump.

Remove the screws fixing the supporting board.

Close-up of a metallic structural component with two red-circled features, no visible text or symbols.

Remove the screw fixing the pump clamp.

Close-up of a mechanical component with a red circle highlighting a small feature, no visible text or symbols.

Now, remove the pump and replace.

Close-up of a mechanical component with a black square base and a black cable inserted, no visible text or symbols.

Remove the screw fixing the water switch which controls the water in tank.

Close-up of a mechanical component with a red circle highlighting a small feature (no visible text or symbols)

Press the clamp fixing the water switches which control the water in the chassis.

Then remove the screws fixing the switches and replace. Pay attention to the holes. Don't install into wrong holes.

Close-up of a mechanical device with blue connectors and wiring, circled in red (no visible text or symbols)

Close-up of a mechanical device with blue connectors and yellow wires, no visible text or symbols

Press downward here

5 Exploded view (See attached files)

6 Spare parts list (See attached files)

7 Specification (See attached files)