Panasonic CW-C180EF-W Service Manual

Contents

CW-C180EF-W, CW-C180EF-M & CW-SC180EFCW-C240EFItem Pressure(MPa)Temperature(°C)Pressure(MPa)Temperature(°C)A 2.09 ~ 2.19 64 ~ 83 2.23 ~ 2.30 72 ~ 88B 1.94 ~ 2.04 38 ~ 48 2.01 ~ 2.16 35 ~ 45C 0.54 ~ 0.63 8 ~ 12.5 0.52 ~ 0.56 6.5 ~ 10.5D 0.48 ~ 0.54 5.5 ~ 13.5 0.50 ~ 0.54 4 ~ 12Note: Indoor temperature at 27°C (DB), 19°C (WB) and Outdoor at35°C (DB), 24°C (WB) for Cooling.4 Refrigeration Cycle Diagram5 Air Conditioner Performance EvaluationIntake & Discharge AirTemperature DifferenceCurrent Drain Determination Remedy• 8°C and over (14.4°F) • As specified. • Nothing wrong. • None.• 8°C and over (14.4°F) • Higher than specified. • Nothing wrong, outdoortemperature is too high, heatradiation is not efficient.• Improve heat radiation.• Under 8°C (14.4°F) • Higher than specified. • Something is preventing heatradiation.• Excessive amount of refrigerant.• Improve heat radiation.• Under 8°C (14.4°F) • Lower than specified. • Leakage of refrigerant orrefrigerant system is blocked.• Locate and repair leak.• Flush refrigeration cycle.• Under 8°C (14.4°F) • Higher than specified by50%.• Compressor defect orcompressor capacitor defect.• Replace the compressor orcompressor capacitor.Note: Room air humidity is relatively higher, the temperature difference will be smaller.6 Troubleshooting GuideWarning: Disconnect unit from electrical power supply before making any electrical checks.Trouble Check Result Cause RemedyFan Motor andCompressor won’t run.• Supply Voltage• Fuse Box or CircuitBreaker.• Power cord orWiring Harness.• Thermostat Setting.• Less than 10% byRated.• Open Contacts.• Pulled loose orShorted.• Higher than roomtemp.• Temporary or Permanent?• Customer Restarted unitimmediately without waiting3 minutes.• Consult ELECTRICIAN, Ifpermanent.• Repair Open Circuit.• WAIT FOR 3 MINUTES.• Repair or Replace it.• Set it LOWER.Fan Motor won’t run(Compressor run).• Objects aroundFan.• RESISTANCEbetween Wires.• Capacitor FanMotor.• Main ControlSwitch.• Locked Fan.• Shorted / Opencircuit.• OHM Meter doesn’tDeflect.• No contacts atPosition Shown.• Fan Hitting Cowling or• Foreign Materials.• Frozen Bearings.• Shorted or Burned out.• Capacitor Defect.• Main Control Switch defect.• Adjust Fan position settingscrew.• Remove Foreign Materials.• Replace Fan Motor.• Replace Fan Motor.• Replace Capacitor Fan.• Replace Main ControlSwitch.Compressor won’t run(Fan run).• Thermostat setting.• RESISTANCEbetween Terminaland theCompressor Body.• RESISTANCEbetween Terminals.• Overload Protector.• CapacitorCompressor.• Thermostat.• Main ControlSwitch.• Higher than roomtemp.• Shorted.• Shorted.• Infinity betweenTerminals.• OHM Meter doesn’tdeflect.• No click heard.• No contacts atPosition Shown.• Winding Coil touched to thecompressor shell.• Rear Shorted or Burnt out.• Overload Protector defect.• Capacitor defect.• Thermostat defect.• Main Control Switch defect.• Set it lower.• Replace Compressor.• Replace Compressor.• Replace OverloadProtector.• Replace CapacitorCompressor.• Replace Thermostat.• Replace Main ControlSwitch.6CW-C180EF-W / CW-C240EF / CW-C180EF-M / CW-SC180EF