Panasonic U-72MF2U9 Installation Instructions Manual page 58

Wired remote
control display
Indoor thermistor is either open or damaged.
<<F01>>
<<F02>>
<<F03>>
<<F10>>
<<F11>>
Outdoor thermistor is either open or damaged.
F04
F05
F06
F07
F08
F12
F14
F16
F17
F23
F24
Protective device in indoor unit is activated.
<<P01>>
<<P09>>
<<P10>>
<<P12>>
P14
Protective device in outdoor unit is activated.
P03
P04
P05
P15
P16
P17
P19
P22
P26
P29
Indoor unit communication error of group control
<P31>
wiring.
EEPROM on indoor unit PCB failure
F29
EEPROM on outdoor unit PCB failure
F31
Protective device for compressor No. 1 is
H01
activated.
H03
H05
Protective device for compressor No. 2 is
H11
activated.
H13
H15
H06
Oil sensor fault. (Disconnection, etc.)
H08
H27
Detected contents
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)
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)
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)
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)
Indoor fan motor activated thermal protector.
Connection to the panel of indoor unit is not good.
Float switch of drain pan safety is activated.
Indoor fan inverter protection control is activated.
Input detected at EXCT terminal on indoor PCB for refrigerant detector.
1st compressor discharge temperature too high.
Protection device activated. High pressure switch (63PH, 63PH1 or
63PH2) or compressor thermal protector (49C1 / 49C2).
Open phase in power input is detected at HIC for 1st compressor.
Open phase in power input is detected at HIC for 2nd compressor.
Overcurrent of 1st compressor on the secondary side of inverter circuit,
or inverter failed to syncronize with rotation.
2nd compressor discharge temperature too high.
Inverter for 2nd compressor failed to start or failed to syncronize with
rotation.
Fan motor or inverter drive of outdoor unit has failure.
Overcurrent of 2nd compressor on the secondary side of inverter circuit,
or inverter failed to syncronize with rotation.
Inverter for 1st compressor failed to start or failed to syncronize with
rotation.
Other indoor unit in group control has an alarm.
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)
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)
Low pressure is too low.
OIL1 thermistor for the oil of 1st compressor has failure. (OIL1)
OIL2 thermistor for the oil of 2nd compressor has failure. (OIL2)
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