Panasonic Urban Multi MX1R Series Service Manual

PACD011001C2Table of Contents ix3.11 Indoor Unit: Malfunction of Thermistor (R1T) for Air Inlet.....................5083.12 Indoor Unit: Malfunction of Thermostat Sensorin Remote Controller ............................................................................5093.13 Outdoor Unit: Actuation of Safety Device.............................................5103.14 Outdoor Unit: PC Board Defect ............................................................5113.15 Outdoor Unit: Actuation of High Pressure Switch.................................5123.16 Outdoor Unit: Actuation of Low Pressure Switch .................................5133.17 Outdoor Unit: Malfunction of Moving Part ofElectronic Expansion Valve (Y1E)........................................................5143.18 Outdoor Unit: Abnormal Discharge Pipe Temperature.........................5153.19 Outdoor Unit: Malfunction of Thermistor (R1T) for Outdoor Air............5163.20 Outdoor Unit: Malfunction of Discharge Pipe Thermistor (R3T)...........5173.21 Outdoor Unit: Malfunction of Thermistor (R4T) for Suction Pipe..........5183.22 Outdoor Unit: Malfunction of Thermistor (R2T) for Heat Exchanger ....5193.23 Outdoor Unit: Malfunction of Discharge Pipe Pressure Sensor ...........5203.24 Outdoor Unit: Malfunction of Suction Pipe Pressure Sensor................5213.25 Low Pressure Drop Due to Refrigerant Shortage orElectronic Expansion Valve Failure......................................................5223.26 Negative Phase, Open Phase ..............................................................5233.27 Malfunction of Transmission Between Indoor Units .............................5243.28 Malfunction of TransmissionBetween Remote Controller and Indoor Unit........................................5253.29 Malfunction of Transmission Between Outdoor Units ..........................5263.30 Malfunction of TransmissionBetween Master and Slave Remote Controllers ..................................5273.31 Malfunction of TransmissionBetween Indoor and Outdoor Units in the Same System.....................5283.32 Excessive Number of Indoor Units .......................................................5293.33 Address Duplication of Central Remote Controller...............................5303.34 Refrigerant System not Set, Incompatible Wiring/Piping......................5313.35 Malfunction of System, Refrigerant System Address Undefined..........5324. Failure Diagnosis for Inverter System .................................................5334.1 Points of Diagnosis...............................................................................5334.2 How to Use The Monitor Switch on The Inverter PC Board .................5345. Troubleshooting (Inverter)...................................................................5355.1 Outdoor Unit: Malfunction of Inverter RadiatingFin Temperature Rise...........................................................................5355.2 Outdoor Unit: Inverter Instantaneous Over-Current .............................5365.3 Outdoor Unit: Inverter Thermostat Sensor, Compressor Overload ......5375.4 Outdoor Unit: Inverter Stall Prevention, Compressor Lock ..................5385.5 Outdoor Unit: Malfunction of TransmissionBetween Inverter and Control PC Board ..............................................5395.6 Power Supply Insufficient or Instantaneous Failure .............................5405.7 Outdoor Unit: Inverter Over-Ripple Protection .....................................5415.8 Outdoor Unit: Malfunction of Inverter RadiatingFin Temperature Rise Sensor ..............................................................5426. Troubleshooting (OP: Central Remote Controller) ..............................5436.1 Malfunction of TransmissionBetween Central Remote Controller and Indoor Unit ...........................5436.2 PC Board Defect ..................................................................................5446.3 Malfunction of TransmissionBetween Optional Controllers for Centralised Control..........................545