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Trouble
Check
Result
Cause
Remedy
Fan Motor won’t run
(Compressor run).
(Compressor run).
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Objects around
Fan.
Fan.
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RESISTANCE
between Wires.
between Wires.
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Capacitor Fan
Motor.
Motor.
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Main Control
Switch.
Switch.
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Locked Fan.
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Shorted / Open
circuit.
circuit.
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OHM Meter doesn’t
Deflect.
Deflect.
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No contacts at
Position Shown.
Position Shown.
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Fan Hitting Cowling or
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Foreign Materials.
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Frozen Bearings.
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Shorted or Burned out.
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Capacitor Defect.
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Main Control Switch defect.
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Adjust Fan position setting
screw.
screw.
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Remove Foreign Materials.
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Replace Fan Motor.
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Replace Fan Motor.
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Replace Capacitor Fan.
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Replace Main Control
Switch.
Switch.
Compressor won’t run (Fan
run).
run).
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Thermostat setting.
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RESISTANCE
between Terminal
and the
Compressor Body.
between Terminal
and the
Compressor Body.
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RESISTANCE
between Terminals.
between Terminals.
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Overload Protector.
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Capacitor
Compressor.
Compressor.
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Thermostat.
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Main Control
Switch.
Switch.
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Higher than room
temp.
temp.
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Shorted.
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Shorted.
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Infinity between
Terminals.
Terminals.
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OHM Meter doesn’t
deflect.
deflect.
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No click heard.
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No contacts at
Position Shown.
Position Shown.
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Winding Coil touched to
the compressor shell.
the compressor shell.
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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.
Protector.
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Replace Capacitor
Compressor.
Compressor.
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Replace Thermostat.
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Replace Main Control
Switch.
Switch.
Air Swing won’t run.
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Main Control
Switch.
Switch.
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Air Swing Switch.
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Resistance
between wires.
between wires.
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High or Low Fan
setting.
setting.
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OFF position.
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No contact at
position.
position.
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OHM Meter doesn’t
deflect.
deflect.
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Open circuit.
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Shorted or open circuit.
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Set it High or Low Cool.
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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.
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Thermostat Setting.
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Ventilation door
open.
open.
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Air filter dirty.
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Location of
installation.
installation.
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Evaporator /
Condenser Coil
obstructed.
Condenser Coil
obstructed.
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Unit capacity for
the room too small.
the room too small.
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Temp difference
and running
current.
and running
current.
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Higher than room
temp.
temp.
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Open.
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Clogged or dirty.
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Sunlight hitting
outdoor side.
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.
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.
refrigeration system is
blocked.
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Set it lower.
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Close Vent. door.
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Clean or replace Air Filter.
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Consider building an
AWNING.
AWNING.
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Remove obstacles or
reinstall unit.
reinstall unit.
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Clean the coils.
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Replace the unit with
bigger one.
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.
each other.
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Fan splashing Drain Water.
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Reinstall unit or Reinforce
the installation.
the installation.
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Adjust Fan position or
remove foreign materials.
remove foreign materials.
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About 1/2” Clearance
needed.
needed.
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Normal occurrence.
Water dripping inside room.
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Unit installation.
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Drain Tray-
Styrofoam pieces
blocking drain
channel.
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.
materials.
Frozen Evaporator
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Thermostat setting.
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Air filter /
Evaporator.
Evaporator.
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Temp. difference
and running
current.
and running
current.
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Set too low for
ambient conditions.
ambient conditions.
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Clogged or Dirty.
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REFER TO
PERFORMANCE
EVALUATION.
PERFORMANCE
EVALUATION.
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Outdoor temp. low (Night
time).
time).
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Restricted air circulation.
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Leakage of refrigerant or
refrigeration system is
blocked.
refrigeration system is
blocked.
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Set the Main Control Knob
to Fan to melt ice and set
the Temp. Control to
higher temperature.
to Fan to melt ice and set
the Temp. Control to
higher temperature.
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Clean Air filter /
Evaporator.
Evaporator.
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Locate and repair leak.
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Flush refrigeration cycle.
5
CW-C71YE / CW-C91YE
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