Trouble
Check
Result
Cause
Remedy
Compressor won’t run
(Fan run).
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Temperature
setting.
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RESISTANCE
between Terminal
and the
Compressor Body.
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RESISTANCE
between Terminals.
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Overload Protector.
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Capacitor
Compressor.
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Thermostat.
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Main Control
Switch.
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Higher than room
temp.
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Shorted.
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Shorted.
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Infinity between
Terminals.
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OHM Meter doesn’t
deflect.
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No click heard.
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No contacts at
Position Shown.
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Winding Coil touched to
the compressor shell.
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Rear Shorted or Burnt out.
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Rear Shorted or Burnt out.
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Overload Protector defect.
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Capacitor defect.
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Thermostat defect.
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Main Control Switch defect.
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Set it lower.
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Replace Compressor.
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Replace Compressor.
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Replace Overload
Protector.
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Replace Capacitor
Compressor.
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Replace Thermostat.
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Replace Main Control
Switch.
Air Swing won’t run.
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Air Swing Switch.
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Resistance
between wires.
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OFF position.
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No contact at
position.
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OHM Meter doesn’t
deflect.
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Open circuit.
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Shorted or open circuit.
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Set it ON.
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Replace Air Swing Switch.
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Replace Air Swing Motor.
Insufficient cooling or
heating.
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Temperarute
Setting.
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Ventilation door
open.
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Air filter dirty.
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Location of
installation.
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Evaporator /
Condenser Coil
obstructed.
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Unit capacity for
the room too small.
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Temperature
difference and
running current.
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Higher than room
temperature
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Open.
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Clogged or dirty.
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Sunlight hitting
outdoor side.
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Obstacles.
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Clogged or dirty.
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Not satisfied.
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REFER TO
PERFORMANCE
EVALUATION.
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Reduces capacity.
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Restricted air circulation.
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Restricted Heat Exchanger.
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Restricted Heat Exchanger.
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Restricted air circulation.
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Leakage of refrigerant or
refrigeration system is
blocked.
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Set it lower.
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Close Ventilation door.
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Clean or replace Air Filter.
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Consider building an
AWNING.
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Remove obstacles or
reinstall unit.
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Clean the coils.
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Replace the unit with
bigger one.
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Locate repair leak.
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Flush refrigeration cycle.
Noise.
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Source of Noise
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Vibration.
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Intermittent Noise.
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Faulty installation.
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Fan hitting objects.
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Refrigerant tubing touching
each other.
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Fan splashing Drain Water
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Reinstall unit or Reinforce
the installation.
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Adjust Fan position or
remove foreign materials.
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About 1/2” Clearance
needed.
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Remove drain plug and
mount a drain pan to
remove the water.
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Set the Drain outlet
downward, so that the
Drain water can run off
Water dripping inside
room.
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Unit installation.
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Drain Tray-
Styrofoam pieces
blocking drain
channel.
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Tilted to inside room.
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Clogged.
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Restricted run off.
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Clogged or blocked.
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Tilt unit to outside slightly.
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Remove the foreign
materials.
Frozen Evaporator
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Temperature
setting.
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Air filter /
Evaporator.
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Temperature
difference and
running current.
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Set too low for
ambient conditions.
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Clogged or Dirty.
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REFER TO
PERFORMANCE
EVALUATION.
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Outdoor temperature low
(Night time).
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Restricted air circulation.
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Leakage of refrigerant or
refrigeration system is
blocked.
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Set the Main Control Knob
to Fan to melt ice and set
the Temperature control to
higher temperature.
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Clean Air filter /
Evaporator.
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Locate and repair leak.
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Flush refrigeration cycle.
No
heating
(Fan
and
Compressor run).
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Reversing
valve
coil.
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Reversing valve.
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Infinity between coil.
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Resistance
between
reversing valve coil.
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Replace
reversing
valve
coil.
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Replace reversing valve.
Frozen Condenser
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Outdoor
ambient
temperature
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Heating operation at
low outdoor ambient
temperature
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Outdoor
ambient
temperature is low.
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Set Main Control Switch to
Fan to melt ice.
7
CW-A90VE / CW-A120VE
