Panasonic Urban Multi MX1R Series Service Manual page 4

PACD011001C2
4. Failure Diagnosis for Inverter System .................................................192
5. Troubleshooting (Inverter)...................................................................194
Table of Contents
3.4 Indoor Unit: Fan Motor (M1F) Lock, Overload......................................159
3.5 Indoor Unit: Malfunction of Swing Flap Motor (M1S)............................160
3.6 Indoor Unit: Malfunction of Moving Part of
Electronic Expansion Valve (Y1E)........................................................161
3.7 Indoor Unit: Drain Level above Limit ....................................................162
3.8 Indoor Unit: Malfunction of Capacity Determination Device .................163
3.9 Indoor Unit: Malfunction of Thermistor (R2T) for Liquid Pipe ...............164
3.10 Indoor Unit: Malfunction of Thermistor (R3T) for Gas Pipes ................165
3.11 Indoor Unit: Malfunction of Thermistor (R1T) for Air Inlet.....................166
3.12 Indoor Unit: Malfunction of Thermostat Sensor
in Remote Controller ............................................................................167
3.13 Outdoor Unit: Actuation of Safety Device.............................................168
3.14 Outdoor Unit: PC Board Defect ............................................................169
3.15 Outdoor Unit: Actuation of High Pressure Switch.................................170
3.16 Outdoor Unit: Actuation of Low Pressure Switch .................................171
3.17 Outdoor Unit: Malfunction of Moving Part of
Electronic Expansion Valve (Y1E)........................................................172
3.18 Outdoor Unit: Abnormal Discharge Pipe Temperature.........................173
3.19 Outdoor Unit: Malfunction of Thermistor (R1T) for Outdoor Air............174
3.20 Outdoor Unit: Malfunction of Discharge Pipe Thermistor (R3T)...........175
3.21 Outdoor Unit: Malfunction of Thermistor (R4T) for Suction Pipe..........176
3.22 Outdoor Unit: Malfunction of Thermistor (R2T) for Heat Exchanger ....177
3.23 Outdoor Unit: Malfunction of Discharge Pipe Pressure Sensor ...........178
3.24 Outdoor Unit: Malfunction of Suction Pipe Pressure Sensor................179
3.25 Outdoor Unit: Malfunction of Oil Temperature Thermistor (R5T) .........180
3.26 Low Pressure Drop Due to Refrigerant Shortage or
Electronic Expansion Valve Failure......................................................181
3.27 Negative Phase, Open Phase ..............................................................182
3.28 Malfunction of Transmission between Indoor Units..............................183
3.29 Malfunction of Transmission
between Remote Controller and Indoor Unit ........................................184
3.30 Malfunction of Transmission between Outdoor Units...........................185
3.31 Malfunction of Transmission
between Master and Slave Remote Controllers...................................186
3.32 Malfunction of Transmission
between Indoor and Outdoor Units in the Same System .....................187
3.33 Excessive Number of Indoor Units .......................................................188
3.34 Address Duplication of Central Remote Controller...............................189
3.35 Refrigerant System not set, Incompatible Wiring/Piping ......................190
3.36 Malfunction of System, Refrigerant System Address Undefined..........191
4.1 Points of Diagnosis...............................................................................192
4.2 How to use the Monitor Switch on the Inverter PC Board ....................193
5.1 Outdoor Unit: Malfunction of Inverter Radiating
Fin Temperature Rise...........................................................................194
5.2 Outdoor Unit: Inverter Instantaneous Over-Current .............................195
5.3 Outdoor Unit: Inverter Thermostat Sensor, Compressor Overload ......196
5.4 Outdoor Unit: Inverter Stall Prevention, Compressor Lock ..................197
5.5 Outdoor Unit: Malfunction of Transmission
between Inverter and Control PC Board ..............................................198
5.6 Power Supply Insufficient or Instantaneous Failure .............................199
iii