MovinCool Office Pro W20 Service Manual - Manual (Page 43)

Repair Section
43
Condition
Check Area Possible Cause Remedy
Insufficient Cooling
Air volume
normal
Compressor
operates.
1. Usage conditions
(high temperature).
Operation near usage limits. Review the installation
place.
2. Dirt in evaporator. Insufficient heat exchange. Clean fins.
3. Frost in refrigeration cycle. Clogging at the frost section. Replace clogged section.
4. No temperature difference
between evaporator and
condenser.
Insufficient refrigerant. Check the leaking part,
then repair and charge
refrigerant.
5. Water system (water line,
condenser, water regulating
valve)
Water system is clogged with
accumulated sediment.
Clean the water system
to remove accumulated
sediment.
(See page 52 and 53.)
6. Water source. Insufficient water flow. Adjust flow of the
supplied water source.
(See page 52.)
Compressor
does not
operate.
1. Compressor coil resistance.
(0 ohm or
∞ ohm)
Short or open circuit. Replace compressor.
(In case of short, check
the compressor relay.)
2. Compressor relay on the
relay board.
Open circuit or insufficient
contact.
Replace relay board.
3. Capacitor for compressor
motor.
Capacitor malfunction. Replace capacitor.
4. Voltage. Low voltage. Repair power.
Insufficient
air volume
No air.
1. Coil resistance of fan motor.
(0 ohm or
∞ ohm)
Short or open circuit. Replace fan motor.
2. Fan on-off relay on the relay
board.
Open circuit or insufficient
contact.
Replace relay board.
3. Fan HI/LO change relay on
the relay board.
Open circuit or insufficient
contact.
Replace relay board.
Insufficient
air volume.
1. Air filter. Clogged air filter. Clean air filter.
2. Evaporator. Clogged evaporator or
crushed fins.
Repair and clean fins or
replace it.
3. Duct connection state. Improper connection. Repair duct connection.
4. Fan motor. Insufficient rotation. Replace motor.