Panasonic U-4LE2E5 Service Manual & Test Run Service Manual page 172

7. Self-Diagnosis Function Table and Contents of Alarm Display
Remote control display
E14
E15
E16
E18
E20
E31
F01
F02
F03
F04
F06
F07
F08
F10
F11
F12
F14
F16
F17
F29
F31
H01
H02
H03
H05
H06
H31
L01
L02
L03
L04
L05
L06
L07
L08
L09
L10
L13
L17
L18
P01
P03
P04
P05
P09
P10
P11
P12
7
P14
P16
P20
P22
P29
P31
Two or more indoor units are set as main, in the group controlled indoor units.
Fewer indoor units are found in Auto Addressing than the setting on outdoor PCB.
More indoor units are found in Auto Addressing than the setting on outdoor PCB.
No response from sub indoor to the main indoor unit in group control wiring.
No indoor unit responded in Auto Addressing.
Error in communication inside outdoor unit control box.
Indoor unit heat exchanger liquid temperature sensor has failure. (E1)
Indoor unit heat exchanger temperature sensor has failure. (E2)
Indoor unit heat exchanger gas temperature sensor has failure. (E3)
Compressor discharge temperature sensor has failure. (DISCH)
Outdoor unit heat exchanger gas temperature sensor has failure. (EXG)
Outdoor unit heat exchanger liquid temperature sensor has failure. (EXL)
Outdoor temperature sensor has failure. (TO)
Indoor suction air (room) temperature sensor has failure. (TA)
Indoor discharge air temperature sensor has failure. (BL)
Compressor inlet temperature sensor has failure. (SCT)
Subcooling heat exchanger temperature sensor has failure. (SCG)
High pressure sensor has failure. (HPS)
Low pressure sensor has failure. (LPS)
EEPROM on indoor unit PCB has failure.
EEPROM on outdoor unit PCB has failure.
Compressor primary current is overcurrent.
PFC is overcurrent or VDC is overvoltage. (Single phase only)
Compressor current sensor is disconnected or shorted.
Compressor discharge temperature sensor is disconnected, shorted or misplaced. (DISCH)
Low pressure sensor value is too low.
Compressor HIC has failure. HIC is overcurrent or overheat. VDC is undervoltage or overvoltage.
Indoor unit address setting has error. (No main indoor unit in group control.)
Indoor unit model does not match with the outdoor unit model. (Multi-split/mini-split)
Two or more indoor units are set as main in group control.
Duplicate system address setting on outdoor units.
Two or more indoor units are set as priority indoor unit (priority indoor unit).
Two or more indoor units are set as priority indoor unit (non-priority indoor unit).
Group control wiring is detected for indoor unit set as individual control.
Indoor unit address is not set.
Capacity setting of indoor unit is not correct.
Capacity setting of outdoor unit is not correct.
Indoor unit model does not match with outdoor unit.
Model mismatch between outdoor units.
4-way valve has failure.
Thermal protector for Indoor unit fan motor is activated.
Compressor discharge temperature is too high.
High pressure swich is activated.
AC power supply has abnormal.
Connection to the panel of indoor unit is not good.
Float switch of drain pan safety is activated.
Drain pump failure or locked rotor.
Indoor unit fan inverter protection control is activated.
O sensor has activated.
2
Compressor secondary current is overcurrent.
Too high load in refrigerant circuit.
Outdoor unit fan motor has failure.
Compressor start failure. Compressor is missing phase or reverse phase.
Other indoor unit in group control has an alarm.
Alarm contents
7 - 18
Mini VRF SYSTEM
Test Run