Trouble Check Result Cause Remedy
Compressor won’t run
(Fan run).
• Thermostat setting.
• RESISTANCE
between Terminal
and the
Compressor Body.
• RESISTANCE
between Terminals.
• Overload Protector.
• Capacitor
Compressor.
• Thermostat.
• Main Control
Switch.
• Higher than room
temp.
• Shorted.
• Shorted.
• Infinity between
Terminals.
• OHM Meter doesn’t
deflect.
• No click heard.
• No contacts at
Position Shown.
• Winding Coil touched to the
compressor shell.
• Rear Shorted or Burnt out.
• Overload Protector defect.
• Capacitor defect.
• Thermostat defect.
• Main Control Switch defect.
• Set it lower.
• Replace Compressor.
• Replace Compressor.
• Replace Overload
Protector.
• Replace Capacitor
Compressor.
• Replace Thermostat.
• Replace Main Control
Switch.
Air Swing won’t run.
• Air Swing Switch.
• Resistance between
wires.
• OFF position.
• No contact at
position.
• OHM Meter doesn’t
deflect.
• Open circuit.
• Shorted or open circuit.
• Set it ON.
• Replace Air Swing Switch.
• Replace Air Swing Motor.
Insufficient cooling or
heating.
• Thermostat Setting.
• Ventilation door
open.
• Air filter dirty.
• Location of
installation.
• Evaporator /
Condenser Coil
obstructed.
• Unit capacity for the
room too small.
• Temp difference
and running current.
• Higher or lower than
room temp.
• Open.
• Clogged or dirty.
• Sunlight hitting
outdoor side at
cooling.
• Obstacles.
• Clogged or dirty.
• Not satisfied.
• REFER TO
PERFORMANCE
EVALUATION.
• Reduces capacity.
• Restricted air circulation.
• Restricted Heat Exchanger.
• Restricted Heat Exchanger.
• Restricted air circulation.
• Leakage of refrigerant or
refrigeration system is
blocked.
• Set it lower or higher.
• Close Vent. door.
• Clean or replace Air Filter.
• Consider building an
AWNING.
• Remove obstacles or
reinstall unit.
• Clean the coils.
• Replace the unit with
bigger one.
• Locate repair leak.
• Flush refrigeration cycle.
Noise.
• Source of Noise • Vibration.
• Intermittent Noise.
• Faulty installation.
• Fan hitting objects.
• Refrigerant tubing touching
each other.
• Reinstall unit or Reinforce
the installation.
• Adjust Fan position or
remove foreign materials.
• About 1/2” Clearance
needed.
Water dripping inside
room.
• Unit installation.
• Drain Tray-
Styrofoam pieces
blocking drain
channel.
• Tilted to inside room.
• Clogged.
• Restricted run off.
• Clogged or blocked.
• Tilt unit to outside slightly.
• Remove the foreign
materials.
Frozen Evaporator
• Thermostat setting.
• Air filter /
Evaporator.
• Temp. difference
and running current.
• Set too low for
ambient conditions.
• Clogged or Dirty.
• REFER TO
PERFORMANCE
EVALUATION.
• Outdoor temp. low (Night
time).
• Restricted air circulation.
• Leakage of refrigerant or
refrigeration system is
blocked.
• Set the Main Control Knob
to Fan to melt ice and set
the Temp. Control to higher
temperature.
• Clean Air filter /
Evaporator.
• Locate and repair leak.
• Flush refrigeration cycle.
No heating (Fan and
Compressor run).
• Reversing valve coil.
• Reversing valve.
• Infinity between coil.
• Resistance between
reversing valve coil.
• Replace reversing valve
coil.
• Replace reversing valve.
Frozen Condenser
• Outdoor ambient
temp.
• Heating operation at
low outdoor ambient
temp.
• Outdoor ambient temp. is
low.
• Set Main Control Switch to
Fan to melt ice.
8
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