Troubleshooting Guide - Panasonic CW-C51LE Service Manual

Troubleshooting Guide

Warning : Disconnect unit from electrical power supply before making any electrical checks. Discharge the capacitor before checking it.
Check
Trouble
1. Supply Voltage.
Fan Motor and
Compressor 2. Fuse box or Circuit
won't run. Breaker.
3. Power cord or wiring
harness.
4. Thermostat setting.
1. Objects around fan.
Fan Motor
won't run
2. Resistance between
wires.
3. Capacitor Fan Motor.
4. Main Control Switch.
Compressor 1. Thermostat setting.
won't run (Fan 2. resistance between
terminal and the
motor runs).
compressor body.
3. Resistance between
terminals.
4. Overload Protector (OLP).
5. Capacitor Compressor.
6. Thermostat.
7. Main Control Switch.
Insufficient 1. Thermostat setting.
Cooling 2. Air filter dirty.
3. Location of installation.
4. Evaporator/Condensor coil
obstructed.
5. Unit capacity to small
or room to big.
6. Temperature and
current difference.
Noise 1. Source of noise.
Water Dripping 1. Unit installation.
2. Drain Tray-styrofoam
pieces blocking drain
channel.
1. Thermostat setting.
Frozen Evapo-
rator
2. Air filter/ Evaporator.
3. Temperature and
current difference.
Result
Less than 10% by rated.
Open Contacts.
Pulled loose or shorted.
Higher than room temperature.
Locked fan.
Shorted/Open circuit.
Ohm Meter doesn't deflect.
No contacts at position
shown.
Higher than room temperature.
Shorted.
Shorted.
Infinity between terminals.
Ohm Meter doesn't deflect.
No click around position.
No contacts at position shown.
Higher than room temperature.
Clogged or dirty.
Sunlight hitting outdoor
side obstacles.
Clogged or dirty.
Not satisfied.
Refer performance
evaluation.
Vibration.
Intermitten noise.
Tilted to inside the room.
Clogged.
Set too low for ambient
conditions.
Clogged or dirty.
Refer performance
evaluation.
- 5 -
Cause
Costumer restarted unit
immidiatelly without waiting 3
minutes.
Fan hitting cowling of
foreign materials.
Frozen Bearings.
Shorted or burned out.
Capacitor defect.
Main control switch defect.
Winding coil touch to the body
Rare shorted or burn
out.
Overl o ad Protector (OLP) broken.
Capacitor defect.
Thermostat defect.
Main control switch defect.
Restricted air circulation.
Restricted heat exchanger.
Restricted heat exchanger.
Restricted air circulation.
Leakage of refrigerant or
refrigerant systems is blocked.
Faulty installation.
Fan hitting object.
Refrigerant tubing touching
each other.
Fan splash drain water.
Restricted run off.
Clogged or blocked.
Outdoor temperature low
(Night time).
Restricted air circulation.
Leakage of refrigerant or
refrigerant systems is blocked.
Remedy
Consult to an electician.
Repair open circuit.
Wait for 3 minute.
Repair or replace it.
Set it to lower.
Adjust fan position setting.
Remove foreign materials.
Replace wires.
Replace capacitor fan motor.
Replace main control switch.
Set it to lower.
Replace compressor.
Replace compressor terminals.
Repl a ce Overl o ad Protector.
Replace capacitor compressor.
Replace thermostat.
Replace main control switch.
Set it to lower.
Clean or replace air filter.
Consider to build an awning.
Remove obstacle or reinstall
unit.
Clean by steam cleaner.
Replace the unit with bigger
capacity.
Locate and repair leak.
Flush refrigeration cycle.
Reinstall unit or rein-
force the installation.
Adjust fan position or remove
foreign materials.
About 1/2" Clearance.
Set the drain outlet
downward, so that the
drain water can run off.
Tilt unit to out side slightly.
remove the foreign materials.
Set main control switch to fan
to melt the ice, and set the
temperature control to higher
temperature.
Clean air filter/Evaporator.
Locate and repair the leakage
Flush refrigeration Cycle.