Air Conditioner Performance Evaluation; Troubleshooting Guide - Panasonic CW-C180ES Service Manual

5 Air Conditioner Performance Evaluation

5.1. Cooling.
Intake & Discharge Air
Temperature Difference
• 8°C and over (14.4°F)
• 8°C and over (14.4°F)
• Under 8°C (14.4°F)
• Under 8°C (14.4°F)
• Under 8°C (14.4°F)
Note: Room air humidity is relatively higher, the temperature difference will be smaller.
5.2. Heating.
Intake & Discharge Air
Temperature Difference
• 14°C and over (25.2°F)
• 14°C and over (25.2°F)
• Under 14°C (25.2°F)
• Under 14°C (25.2°F)
Note: Room air humidity is relatively higher, the temperature difference will be smaller.

6 Troubleshooting Guide

Warning: Disconnect unit from electrical power supply before making any electrical checks.
Trouble
• Supply Voltage
Fan Motor and
Compressor won't run.
• Fuse Box or Circuit
• Power cord or
• Thermostat Setting.
• Objects around
Fan Motor won't run
(Compressor run).
• RESISTANCE
• Capacitor Fan
• Main Control
Current Drain
• As specified.
• Higher than specified.
• Higher than specified.
• Lower than specified.
• Higher than specified by
50%.
Current Drain
• As specified.
• Higher than specified.
• Lower than specified.
• Higher than specified by
50%.
Check
• Less than 10% by
Rated.
• Open Contacts.
Breaker.
• Pulled loose or
Wiring Harness. Shorted.
• Higher than room
temp.
• Locked Fan.
Fan.
• Shorted / Open
circuit.
between Wires.
• OHM Meter doesn't
Deflect.
Motor.
• No contacts at
Position Shown.
Switch.
Determination
• Nothing wrong.
• Nothing wrong, outdoor
temperature is too high, heat
radiation is not efficient.
• Something is preventing heat
radiation.
• Leakage of refrigerant or
refrigerant system is blocked.
• Compressor defect or
compressor capacitor defect.
Determination
• Nothing wrong.
• Nothing wrong, outdoor
temperature is high.
• Something is preventing heat
radiation at indoor heat
exchanger.
• Nothing wrong, outdoor
temperature is low.
• Something is preventing heat
radiation at outdoor heat
exchanger.
• Leakage of refrigerant.
• Refrigerant system is blocked.
• Compressor defect.
• Compressor capacitor defect
Result Cause
• Temporary or Permanent?
• 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.
7
CW-C180ES / CW-C240ES / CW-A180ES / CW-A240ES / CW-SC180ES
Remedy
• None.
• Improve heat radiation.
• Excessive amount of refrigerant.
• Improve heat radiation.
• Locate and repair leak.
• Flush refrigeration cycle.
• Replace the compressor or
compressor capacitor.
Remedy
• None.
• None.
• Clean air filter.
• None.
• Improve heat radiation at
outdoor heat exchanger.
• Locate and repair leak.
• Flush refrigeration cycle.
• Replace the compressor.
• Replace the compressor
capacitor.
Remedy
• Consult ELECTRICIAN, If
permanent.
• Repair Open Circuit.
• WAIT FOR 3 MINUTES.
• Repair or Replace it.
• Set it LOWER.
• Adjust Fan position setting
screw.
• Remove Foreign Materials.
• Replace Fan Motor.
• Replace Fan Motor.
• Replace Capacitor Fan.
• Replace Main Control
Switch.