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Repair Section

(3) Overflow of drain water

Symptom

Possible Cause

Remedy

Checking Area Cause

Stops

immediately

after

starting

Control

panel

display

normally.

1. Fan on-off relay on the

relay board.

Open circuit or insufficient

contact.

Replace relay board.

2. Fan HI/LO change relay

on the relay board.

Open circuit or insufficient

contact.

Replace relay board.

3. Fan motor insulation

resistance.

Insulation failure on fan

motor.

Replace fan motor.

4. Compressor relay. Open circuit or insufficient

contact.

Replace compressor relay.

5. Compressor relay on the

relay board.

Open circuit or insufficient

contact.

Replace relay board.

6. Compressor insulation

resistance.

Insulation failure on

compressor.

Replace compressor.

Stops after

running a

while

Control

panel

display

normally.

1. Temperature of fan motor

(abnormally high).

Operation of safety device

(IOLF) due to fan motor

malfunction.

Replace fan motor.

2. Temperature of

compressor (abnormally

high).

Operation of safety device

(IOLC) due to compressor

malfunction.

Replace compressor.

3. Refrigerant leakage. Insufficient refrigerant or gas

leakage.

Repair and charge

refrigerant.

4. Dirt on evaporator or

condenser.

Insufficient cooling of

evaporator or condenser.

Clean evaporator or

condenser.

5. Duct connection state. Improper connection. Repair duct connection.

Symptom

Possible Cause

Remedy

Checking Area Cause

Overflow from the unit.

1. Drain pan. Cracks in drain pan. Check and repair.

2. Water level in drain pan. Clogged drain hose. Check and replace.

3. Drain hole. Reversed air flow from drain

hole.

Insert a trap on discharge

drain hose.

4. Clogged air filter. Reversed air flow from drain

hole due to the excessive

negative pressure inside of

the unit.

Clean air filter.

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Movincool Office Pro 12 / Office Pro 18 / Office Pro 24 Manuale di Servizio Pagina 38

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