Panasonic CW-C70YE Service Manual page 5

Trouble
Fan Motor won't run
(Compressor run).
Compressor won't run (Fan
run).
Air Swing won't run.
Insufficient cooling.
Noise.
Water dripping inside room.
Frozen Evaporator
Check
• Objects around • Locked Fan.
Fan.
• Shorted / Open
• RESISTANCE
circuit.
between Wires.
• OHM Meter doesn't
• Capacitor Fan
Deflect.
Motor.
• No contacts at
• Main Control
Position Shown.
Switch.
• Thermostat setting. • Higher than room
temp.
• RESISTANCE
• Shorted.
between Terminal
and the
• Shorted.
Compressor Body.
• Infinity between
• RESISTANCE
Terminals.
between Terminals.
• OHM Meter doesn't
• Overload Protector.
deflect.
• Capacitor
• No click heard.
Compressor.
• No contacts at
• Thermostat.
Position Shown.
• Main Control
Switch.
• Main Control • High or Low Fan
Switch. setting.
• Air Swing Switch. • OFF position.
• Resistance • No contact at
between wires. position.
• OHM Meter doesn't
deflect.
• Thermostat Setting. • Higher than room
temp.
• Ventilation door
• Open.
open.
• Air filter dirty. • Clogged or dirty.
• Location of • Sunlight hitting
installation. outdoor side.
• Evaporator / • Obstacles.
Condenser Coil
• Clogged or dirty.
obstructed.
• Not satisfied.
• Unit capacity for
• REFER TO
the room too small.
PERFORMANCE
• Temp difference
EVALUATION.
and running
current.
• Source of Noise • Vibration.
• Intermittent Noise.
• Unit installation. • Tilted to inside room.
• Drain Tray- • Clogged.
Styrofoam pieces
blocking drain
channel.
• Thermostat setting. • Set too low for
ambient conditions.
• Air filter /
• Clogged or Dirty.
Evaporator.
• Temp. difference • REFER TO
and running PERFORMANCE
current. EVALUATION.
Result Cause
• Fan Hitting Cowling or
• Foreign Materials.
• Frozen Bearings.
• Shorted or Burned out.
• Capacitor Defect.
• Main Control Switch defect.
• Winding Coil touched to
the compressor shell.
• Rear Shorted or Burnt out.
• Overload Protector defect.
• Capacitor defect.
• Thermostat defect.
• Main Control Switch defect.
• Open circuit.
• Shorted or open circuit.
• Reduces capacity.
• Restricted air circulation.
• Restricted Heat Exchanger.
• Restricted Heat Exchanger.
• Restricted air circulation.
• Leakage of refrigerant or
refrigeration system is
blocked.
• Faulty installation.
• Fan hitting objects.
• Refrigerant tubing touching
each other.
• Fan splashing Drain Water.
• Restricted run off.
• Clogged or blocked.
• Outdoor temp. low (Night
time).
• Restricted air circulation.
• Leakage of refrigerant or
refrigeration system is
blocked.
5
CW-C70YE / CW-C90YE
Remedy
• Adjust Fan position setting
screw.
• Remove Foreign Materials.
• Replace Fan Motor.
• Replace Fan Motor.
• Replace Capacitor Fan.
• Replace Main Control
Switch.
• Set it lower.
• Replace Compressor.
• Replace Compressor.
• Replace Overload
Protector.
• Replace Capacitor
Compressor.
• Replace Thermostat.
• Replace Main Control
Switch.
• Set it High or Low Cool.
• Set it ON.
• Replace Air Swing Switch.
• Replace Air Swing Motor.
• Set it lower.
• 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.
• Reinstall unit or Reinforce
the installation.
• Adjust Fan position or
remove foreign materials.
• About 1/2" Clearance
needed.
• Normal occurrence.
• Tilt unit to outside slightly.
• Remove the foreign
materials.
• 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.