Panasonic CW-C180EE / CW-C240EE / CW-A180EE Service Manual ▷ View online
6 Air Conditioner Performance Evaluation
6.1. Cooling.
Intake & Discharge Air
Temperature Difference
Current Drain
Determination
Remedy
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8°C and over (14.4°F)
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As specified.
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Nothing wrong.
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None.
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8°C and over (14.4°F)
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Higher than specified.
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Nothing wrong, outdoor
temperature is too high, heat
radiation is not efficient.
temperature is too high, heat
radiation is not efficient.
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Improve heat radiation.
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Under 8°C (14.4°F)
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Higher than specified.
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Something is preventing heat
radiation.
radiation.
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Excessive amount of
refrigerant.
refrigerant.
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Improve heat radiation.
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Under 8°C (14.4°F)
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Lower than specified.
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Leakage of refrigerant or
refrigerant system is blocked.
refrigerant system is blocked.
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Locate and repair leak.
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Flush refrigeration cycle.
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Under 8°C (14.4°F)
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Higher than specified by 50%.
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Compressor defect or
compressor capacitor defect.
compressor capacitor defect.
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Replace the compressor or
compressor capacitor.
compressor capacitor.
Note: Room air humidity is relatively higher, the temperature difference will be smaller.
6.2. Heating.
Intake & Discharge Air
Temperature Difference
Current Drain
Determination
Remedy
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14°C and over (25.2°F)
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As specified.
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Nothing wrong.
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None.
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14°C and over (25.2°F)
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Higher than specified.
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Nothing wrong, outdoor
temperature is high.
temperature is high.
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Something is preventing heat
radiation at indoor heat
exchanger.
radiation at indoor heat
exchanger.
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None.
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Clean air filter.
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Under 14°C (25.2°F)
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Lower than specified.
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Nothing wrong, outdoor
temperature is low.
temperature is low.
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Something is preventing heat
radiation at outdoor heat
exchanger.
radiation at outdoor heat
exchanger.
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Leakage of refrigerant.
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Refrigerant system is blocked.
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None.
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Improve heat radiation at
outdoor heat exchanger.
outdoor heat exchanger.
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Locate and repair leak.
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Flush refrigeration cycle.
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Under 14°C (25.2°F)
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Higher than specified by 50%.
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Compressor defect.
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Compressor capacitor defect
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Replace the compressor.
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Replace the compressor
capacitor.
capacitor.
Note: Room air humidity is relatively higher, the temperature difference will be smaller.
7 Troubleshooting Guide
Warning: Disconnect unit from electrical power supply before making any electrical checks.
Trouble
Check
Result
Cause
Remedy
Fan Motor and
Compressor won’t run.
Compressor won’t run.
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Supply Voltage
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Fuse Box or Circuit
Breaker.
Breaker.
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Power cord or
Wiring Harness.
Wiring Harness.
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Thermostat Setting.
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Less than 10% by
Rated.
Rated.
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Open Contacts.
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Pulled loose or
Shorted.
Shorted.
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Higher than room
temp.
temp.
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Temporary or Permanent?
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Customer Restarted unit
immediately without waiting
3 minutes.
immediately without waiting
3 minutes.
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Consult ELECTRICIAN, If
permanent.
permanent.
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Repair Open Circuit.
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WAIT FOR 3 MINUTES.
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Repair or Replace it.
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Set it LOWER.
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.
9
CW-C180EE / CW-C240EE / CW-A180EE
Trouble
Check
Result
Cause
Remedy
Compressor won’t run
(Fan run).
(Fan 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.
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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Air Swing Switch.
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Resistance between
wires.
wires.
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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 ON.
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Replace Air Swing Switch.
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Replace Air Swing Motor.
Insufficient cooling or
heating.
heating.
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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.
room too small.
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Temp difference
and running current.
and running current.
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Higher or lower than
room temp.
room temp.
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Open.
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Clogged or dirty.
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Sunlight hitting
outdoor side at
cooling.
outdoor side at
cooling.
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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 or higher.
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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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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.
Water dripping inside
room.
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.
No heating (Fan and
Compressor run).
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
temp.
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Heating operation at
low outdoor ambient
temp.
low outdoor ambient
temp.
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Outdoor ambient temp. is
low.
low.
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Set Main Control Switch to
Fan to melt ice.
Fan to melt ice.
10
CW-C180EE / CW-C240EE / CW-A180EE
8.1.1. Parts Identification.
8.1.1.1. Vertical Airflow Direction Vane.
Airflow direction adjustment Up-and-Down.
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The vertical airflow direction vane is
controlled by positioning the vane to
discharge the air upwards, downwards
or straight out.
controlled by positioning the vane to
discharge the air upwards, downwards
or straight out.
8.1.1.2. Ventilation Lever.
When the slide lever is in the:
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“OPEN” position, the ventilation door
opens to allow air, smoke or odours to be
expelled from the room.
opens to allow air, smoke or odours to be
expelled from the room.
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“CLOSE” position, the ventilation door is
closed and the air will be circulated inside
the room and conditioned.
closed and the air will be circulated inside
the room and conditioned.
8.1.1.3. Recommended.
Use the air conditioner under the following conditions:
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Operating temperature range.
Indoor side
Outdoor side
D.B.T.
W.B.T.
D.B.T.
W.B.T.
Maximum
Temperature
Temperature
32°C
23°C
43°C
26°C
Minimum
Temperature
Temperature
21°C
15°C
21°C
15°C
D.B.T.: Dry Bulb Temperature
W.B.T.: Wet Bulb Temperature
Note: Humidity may exceed 90%.
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−
−
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Continuous operation at over 90% high humidity may
create condensation and result in water drops on the
intake and outlet vanes.
create condensation and result in water drops on the
intake and outlet vanes.
8 Operating Instructions
8.1. CW-C180EE & CW-C240EE (Cooling only).
11
CW-C180EE / CW-C240EE / CW-A180EE
8.1.2. How to Operate.
(1) Open the Control Panel Cover.
Fig. 1
(2) Power Supply
Switch off the breaker and set the Main Control Knob to the
OFF position before plugging the power plug into an
electrical outlet.
OFF position before plugging the power plug into an
electrical outlet.
Fig. 2
(3) Main Control Knob
Set the Main Control Knob to either LOW COOL or HIGH
COOL as desired, FAN setting operates the fan only.
COOL as desired, FAN setting operates the fan only.
Caution: If the Main Control Knob is turned off or
changed to a fan setting from a cooling operation
setting, WAIT at least 3 minutes before resetting to
cooling operation.
changed to a fan setting from a cooling operation
setting, WAIT at least 3 minutes before resetting to
cooling operation.
Fig. 3
(4) Thermostat Control Knob
Turn the Thermostat Control Knob as shown in Fig. 4.
Usually “6” ~ “7” is the recommended setting position.
Usually “6” ~ “7” is the recommended setting position.
Note: When the Thermostat Control Knob is set to “10”,
moisture may freeze onto the evaporator fins and prevent
effective cooling. If this happens, turn the Main Control
Knob to HIGH FAN, and the Thermostat Control Knob
counterclockwise. This will quickly defrost the evaporator
fins so that normal cooling can be resumed.
moisture may freeze onto the evaporator fins and prevent
effective cooling. If this happens, turn the Main Control
Knob to HIGH FAN, and the Thermostat Control Knob
counterclockwise. This will quickly defrost the evaporator
fins so that normal cooling can be resumed.
Fig.4
(5) Air Swing Switch
(Airflow direction adjustment side-to-side)
To obtain a fixed airflow direction, set the Air Swing Switch
to “ON” for the vanes to swing from side to side until the
desired flow direction is reached, then switch it to “OFF”.
to “ON” for the vanes to swing from side to side until the
desired flow direction is reached, then switch it to “OFF”.
For continuous side-to-side air circulation, set the Air Swing
Switch to “ON”.
Switch to “ON”.
Fig. 5
12
CW-C180EE / CW-C240EE / CW-A180EE
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