Troubleshooting Guide - Panasonic CW-C180BN Service Manual

CW-C180BN

TROUBLESHOOTING GUIDE

WARNING: DISCONNECT UNIT FROM ELECTRICAL POWER SUPPLY BEFORE MAKING ANY ELECTRICAL
CHECKS.
DISCHARGE THE CAPACITOR BEFORE CHECKING IT.
TROUBLE
Fan Motor and 1. Supply Voltage.
Compressor 2. Fuse Box or Circuit Breaker.
won't run.
3. Power cord or Wiring Harness.
4. Thermostat Setting.
Fan Motor 1. Objects around Fan.
won't run
2. RESISTANCE between Wires.
3. Capacitor Fan Motor.
4. Main Control Switch.
Compressor 1. Thermostat Setting.
won't run 2. RESISTANCE between
(Fan runs) Terminal and the
Compressor Body.
3. RESISTANCE between
Terminals.
4. Overload Protector.
5. Capacitor Compressor.
6. Thermostat.
7. Main Control Switch.
Insufficient 1. Thermostat Setting.
cooling or 2. Ventilation Door open.
heating 3. Air Filter dirty.
4. Location of installation.
5. Evaporator/Condenser
Coil obstructed.
6. Unit capacity for the room too
small.
7. Temp difference and
Running Current.
Noise 1. Source of Noise.
No heating 1. Reversing Valve Coil.
(Fan and 2. Reversing Valve.
Compressor run.)
Water dripping 1. Unit Installation.
inside room 2. Drain Tray-STYROFOAM
Pieces blocking Drain
Channel.
Frozen 1. Thermostat Setting
Evaporator
2. Air Filter/Evaporator.
3. Temp. difference and
Running Current.
Frozen 1. Outdoor ambient
Condenser temp.
CHECK
Less than - 10% by Rated.
Open Contacts.
Pulled loose or Shorted.
Higher than ROOM TEMP.
Locked Fan.
Shorted/Open circuit.
OHM Meter doesn't Deflect.
No contacts at Position Shown.
Higher than ROOM TEMP.
Shorted.
Shorted.
Infinity between Terminals.
OHM Meter doesn't deflect.
No CLICK around position.
No contacts at Position shown.
Higher or lower than ROOM TEMP.
Open.
Clogged or Dirty.
Sunlight hitting outdoor side
at cooling.
Obstacles.
Clogged or Dirty.
Not Satisfied.
REFER PERFORMANCE
EVALUATION.
Vibration.
Intermittent Noise.
Infinity between Coil.
Resistance between Reversing
Valve Coil.
Tilted to inside room.
Clogged.
Set too low for ambient
conditions.
Clogged or Dirty.
REFER PERFORMANCE
EVALUATION.
Heating Operation at Low
outdoor ambient temp.
RESULT CAUSE
Customer Restarted unit
immediately without
waiting 3 minutes
Fan Hitting Cowling or
Foreign Materials.
Frozen Bearings.
Shorted or Burned out.
Capacitor Defect.
Main Control Switch defect.
Winding Coil touched to the
Body.
Rear Shorted or Burnt out.
Overload protector defect.
Capacitor defect.
Thermostat defect.
Main Control Switch defect.
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.
Outdoor ambient temp.
is Low.
– 10 –
REMEDY
Consult ELECTRICIAN.
Repair Open Circuit.
WAIT FOR 3 MINUTES.
Repair or Replace it.
Set it LOWER.
Adjust Fan Position set 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 Comp.
Replace Thermostat.
Replace Main Control Switch.
Set it lower or higher.
Close Vent door.
Clean or Replace Air Filter.
Consider building an AWNING.
Remove obstacles or
reinstall unit.
Clean by steam cleaner.
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.
Consider Attaching the Drain
Pan and pull plug in bottom
pan. (REFER INSTALLATION
INSTRUCTIONS)
Replace Reversing Valve coil.
Replace Reversing Valve.
Tilt unit to outside slightly.
Remove the foreign materials.
(REFER OPERATING
INSTRUCTIONS)
Set Main Control Switch to
Fan to melt ICE and Set the Temp.
control to higher temperature
Clean Air Filter/Evaporator.
Locate repair leak.
Flush refrigeration cycle.
Set Main Control Switch
to Fan to melt ICE.