Panasonic Urban Multi MX1R Series, Service Manual, Page: 156 / 643

PACD011001C2
Troubleshooting Urban Multi “MX1, ME1 Series” Using R-22 135
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1. Operation Flowcharts ..........................................................................137
1.1 Indoor Unit Operation Flowchart ..........................................................137
1.2 Outdoor Unit Operation Flowchart........................................................142
2. Troubleshooting by Remote Controller ...............................................146
2.1 The INSPECTION / TEST Button.........................................................146
2.2 Self-diagnosis by Wired Remote Controller .........................................147
2.3 Self-diagnosis by Wireless Remote Controller .....................................148
2.4 Operation of The Remote Controller’s Inspection /
Test Operation Button ..........................................................................151
2.5 Remote Controller Service Mode .........................................................152
2.6 Remote Controller Self-Diagnosis Function
(Display of Malfunction Code) ..............................................................154
3. Troubleshooting ..................................................................................156
3.1 Indoor Unit: Error of External Protection Device ..................................156
3.2 Indoor Unit: PC Board Defect...............................................................157
3.3 Indoor Unit: Malfunction of Drain Level Control System (33H).............158
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