Midea MWF-07CM, MWF-09CM, MWF-12CM, MWF-16CM, MWF-18CM Service Manual

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Website: www.mideaaircon.com

Service manual

CAUTION

- BEFORE SERVICING THE UNIT, READ THE SAFETY

- PRECAUTIONS IN THIS MANUAL.

- ONLY FOR AUTHORIZED SERVICE PERSONNEL.

MODELS: MWF-07CM MWF-09CM MWF-12CM MWF-16CM MWF-18CM MWF-21CM MWF-24CM

GD Midea Refrigerant Equipment Co. Ltd Service manual for E1 Window

CONTENTS

1. PREFACE

1.1 SAFET PRECAUTIONS.................................................................................................................1

1.2 INSULATION RESISTANCE TEST................................................................................................1

1.3 FEATURES.....................................................................................................................................2

1.4 CONTROL LOCATIONS................................................................................................................2

1.5 OUTSIDE DIMENSIONS................................................................................................................2

2. INSTALLATION

2.1 SELECT THE BEST LOCATION...................................................................................................3

2.2 CHECK OF INSTALLATION..........................................................................................................3

2.3 HOW TO DRAIN.............................................................................................................................3

2.4 HOW TO INSTALL.........................................................................................................................4

3. TROUBLESHOOTING

3.1 PIPING SSTEM..............................................................................................................................7

3.2 TROUBLESHOOTING GUIDE.......................................................................................................8

4. WIRING DIAGRAM................................................................................................................................10

5. EXPLODED VIEW .................................................................................................................................14

6. SPARE PARTS LIST…..........................................................................................................................14

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 is charged at the factor. Be sure to read the safety precautions prior to servicing the unit.

1.1 SAFET 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 b the short circuit.

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

1.2 INSULATION RESISTANCE TEST

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 ROTAR SWITCH or POWER SWITCH.

4. The value should be over 1MΩ.

GD Midea Refrigerant Equipment Co. Ltd Service manual for E1 Window

1.3 FEATURES

Designed for HEAT PUMP. Powerful cooling & heating. Slide-in and slide-out chassis for the simple installation and service. Side air-intake, side cooled-air discharge. Washable one-touch filter and easy removed

panel. Super compact design. Reliable and efficient rotary compressor is equipped. Unique Quiet Design. Fresh air switch.

1.4 DIAGRAM PANEL AUTO LOUVER When the switch is on, the louver motor will operate and begin auto louver function. When the switch is off, the louver motor will stop. THERMOSTAT Set the temperature desired. SELECTOR Select the operation function in COOL, HEAT or FAN ONLY with HIGH, MID or LOW fan speed. TEST RUN Turn the knob to this position to operate the unit in FORCED COOLING. Under this mode, the unit will operate in cooling immediately. WAIT THREE MINUTES BEFORE RESTARTING To protect the compressor, please do NOT restart the unit in COOLING or HEATING mode in three minutes.

1.5 OUTSIDE DIMENSIONS

Model A

(mm) B (mm) C (mm)

MWF-07CM MWF-09CM

346 450 535

MWF-12CM 380 600 560 MWF-16CM MWF-18CM

430 660 687

MWF-21CM MWF-24CM

430 660 770

GD Midea Refrigerant Equipment Co. Ltd Service manual for E1 Window

2 INSTALLATION

2.1 SELECT THE BEST LOCATION

1. To avoid vibration and noise, make sure the unit is installed securely and firml.

2. Install the unit where the sunlight does not shine directly on the unit. If the unit receives direct sunlight, build an awning to shade the cabinet.

3. There should be no obstacle, such as a fence or wall, within 50cm from the back of the ambient because it will prevent heat radiation of the condenser.

4. Restriction of outside air will greatly reduce the cooling and heating efficiency of the air

conditioner.

5. Install the unit on a slight angle so that an condensate formed will not enter the room

(about 10mm or 1/4 bubble with level).

6. Install the unit with its bottom portion 75~150cm above the floor level.

7. The power cord must be connected to an independent circuit. The yellow/green wire must

be grounded.

2.2 CHECK OF INSTALLATION

The setting conditions must be checked prior to initial starting. The under mentioned items are especially important checking points when the installation is finished.

1. Grounding wire (yellow/Green) is provided in the power cord. The wire must be grounded.

2. Ensure that the unit is connected to a suitably rated and dedicated circuit.

3. To avoid vibration or noise, make sure the air conditioner is installed securely.

4. Avoid placing furniture of draperies in front of the air inlet and outlet.

2.3 HOW TO DRAIN

The base pan ma overflow due to high humidity. To drain the excess water, remove the drain cap from the bottom of the unit (if fitted) and attach a drain hose (not supplied).

1. Take the drain pan which is packed with the unit.

2. Remove the rubber plug from the bottom of the base pan (if fitted).

3. Install the drain pan over the area of the cabinet where you removed the plug, and secure with 2 screws provided.

GD Midea Refrigerant Equipment Co. Ltd Service manual for E1 Window

4. Connect the drain hose to the outlet located at the bottom of the drain pan. You can purchase the drain hose or tubing locally to satisfy our particular needs (Drain hose is n o t s u p p li e d).

2.4 HOW TO INSTALL

2.4.1 Installation of the housing

Step 1

Remove the air conditioner from it's packaging, remove fixing screws and slide the air conditioner out of it's housing (Refer to Installation Steps).

Step 2

Prepare the hole in the wall so that the bottom of the housing is well supported, the top has minimum clearance and the air inlet louvers have clearance as shown below in options A and B. Holes from the outside through to the cavity should be sealed. The housing should slope down towards the rear b about 5mm to allow water formed during operation to drain.

Step 3

Install the housing into the wall and secure. Ensure the foam seals are not damaged. Flash, seal or fill gaps around the inside and outside to provide satisfactory appearance and protection against the weather, insects and rodents.

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Midea MWF-07CM, MWF-09CM, MWF-12CM, MWF-16CM, MWF-18CM Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual