Panasonic U-72MF2U9 Service Manual page 212

8. Self-Diagnosis Function Table and
Contents of Alarm Display
Remote control display
E09
E12
E14
E15
E16
E18
E20
E24
E25
E26
E27
E29
E30
E31
1
F01
F02
F03
F04
F05
2
F06
F07
F08
F10
F11
F12
3
F14
F16
F17
F23
F24
F29
4
F31
H01
H03
H05
H06
5
H07
H08
H11
H13
H15
H21
6
H27
H31
L01
L02
L03
L04
7
L05
L06
L07
L08
L09
8
L10
L11
L13
L17
P01
P03
9
Two or more remote controllers are set as main on R1-R2 link.
Auto Address failed to start.
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.
No response from sub outdoor unit.
The outdoor unit address is duplicating.
The number of responding outdoor units does not match with the setting on the main outdoor unit.
Improper wiring between main and sub outdoor units.
No response from main outdoor unit.
The outdoor unit is having error in sending serial communication signal on main-sub communication line.
Error in communication inside outdoor unit control box.
E1 thermistor on liquid side of indoor heat exchanger has failure. (E1)
Indoor unit set as single split. (E2)
E3 thermistor on gas side of indoor heat exchanger has failure. (E3)
DISCH1 thermistor at the discharge of 1st compressor reading is abnormal.
DISCH2 thermistor at the discharge of 2nd compressor reading is abnormal.
EXG1 thermistor at the gas side of 1st heat exchanger of the outdoor unit has failure. (EXG1)
EXL1 thermistor at the liquid side of 1st heat exchanger of the outdoor unit has failure. (EXL1)
TO thermistor for outdoor ambient air temperature has failure. (TO)
TA thermistor for intake air temperature (room temperature) of the indoor unit has failure. (TA)
BL thermistor for supply air temperature of the indoor unit has failure. (BL)
SCT thermistor at the suction refrigerant of compressors has failure. (SCT)
SCG thermistor at the outlet of subcooling heat exchanger in outdoor unit has failure. (SCG)
High pressure sensor of the outdoor unit has failure. (HPS)
Low pressure sensor of the outdoor unit has failure. (LPS)
EXG2 thermistor at the gas side of 2nd heat exchanger of the outdoor unit has failure. (EXG2)
EXL2 thermistor at the liquid side of 2nd heat exchanger of the outdoor unit has failure. (EXL2)
EEPROM on indoor unit PCB has failure.
EEPROM on outdoor unit PCB has failure.
Overcurrent in 1st compressor.
Current sensor for the 1st compressor is disconnected or shorted.
DISCH1 thermistor at the discharge of 1st compressor is disconnected, shorted or misplaced. (DISCH1)
Low pressure is too low.
Low on oil or the oil recovery circuit has restriction.
OIL1 thermistor for the oil of 1st compressor has failure. (OIL1)
Overcurrent in 2nd compressor.
Current sensor for the 2nd compressor is disconnected or shorted.
DISCH2 thermistor at the discharge of 2nd compressor is disconnected, shorted or misplaced. (DISCH2)
HIC for 2nd compressor has failure. Overcurrent or overheat of HIC.
OIL2 thermistor for the oil of 2nd compressor has failure. (OIL2)
HIC for 1st compressor has failure. Overcurrent or overheat of HIC.
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.
Two or more indoor units are set as 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.
Incorrect wiring of remote group control wiring (in case of shared solenoid valve kit)
Indoor unit model does not match with outdoor unit.
Model mismatch between outdoor units in one refrigerant circuit.
Indoor fan motor activated thermal protector.
1st compressor discharge temperature too high.
Alarm contents
6 - 18
3WAY VRF SYSTEM
Test Run