MovinCool Climate Pro 18 Service Manual - Manual (Page 60)

Repair Section
60
Troubleshooting of Insufficient Cooling or Heating - Table 1
Condition
Check Area Possible Cause Remedy Insufficient Cooling
or Heating
Air volume
normal
Compressor
operates.
Usage conditions
(high/low temperature) Operates near minimum or
maximum of operation
range. Review the installation
place.
Dirt in the indoor or outdoor
heat exchanger Insufficient heat exchange Clean the heat
exchangers.
Frost in the refrigeration
system Clogging at the frost section Service the refrigeration
system.
No temperature difference
between indoor and outdoor
heat exchangers Insufficient refrigerant Check the leaking part,
then repair and charge
the correct amount of
refrigerant.
Compressor
does not
operate.
Voltage Low voltage Repair the power supply.
Compressor relay on the
relay board Open circuit or insufficient
contact surface area Replace the relay board.
Capacitor for compressor
motor Capacitor malfunction Replace the capacitor.
Compressor coil resistance
(0 ohm or
∞ ohm)
Short or open circuit Replace the compressor.
(In case of short, check
the compressor relay.)
Abnormal
air volume
No air
Fan on-off relay on the relay
board Open circuit or insufficient
contact surface area Replace the relay board.
Coil resistance of indoor or
outdoor fan motor
(0 ohm or
∞ ohm)
Short or open circuit Replace the fan motor.
Insufficient
air volume
Air filter Clogged air filter Clean the air filter.
Indoor or outdoor heat
exchanger Clogged indoor or outdoor
heat exchanger Clean the indoor or
outdoor heat exchanger.
Crushed fins Repair or replace the
heat exchanger.
Duct connection state Improper connection Repair duct connection.
Indoor or outdoor fan motor Abnormal rotation Replace the fan motor.
Fan speed change relay on the
relay board Open circuit or insufficient
contact surface area Replace the relay board.