Way Alarm Codes - Panasonic U-8MF2E8 Service Manual

4. 3WAY Alarm Codes

With types 8HP and 10HP, the INV compressor is compressor 1.
With types 12HP, 14HP and 16HP, the INV compressor is compressor 1, and the constant-speed
compressors (AC1) are compressors 2.
Alarm code
E06 Outdoor unit failed to receive serial communication signals from indoor unit.
E12 Automatic address setting start is prohibited.
E15 Automatic address setting alarm (too few units)
E16 Automatic address setting alarm (too many units)
E20 No indoor units at automatic address setting.
E24 Outdoor unit failed to receive communications from another outdoor unit.
E25 Outdoor unit address setting failure (duplication)
E26 Mismatch in outdoor unit quantity
E29 Outdoor unit failed to receive communication from outdoor unit (main)
E31 Communication error between the microcomputers
F04 Compressor 1 discharge temperature sensor trouble
F05 Compressor 2 discharge temperature sensor trouble
F06 Gas temperature sensor trouble at outdoor heat exchanger 1 (In)
F07 Liquid temperature sensor trouble at outdoor heat exchanger 1 (Out)
F08 Outdoor air temperature sensor trouble
F12 Compressor intake temperature sensor trouble (SCT)
F14 Temp. sensor at refrigerant gas outlet of dual-tube (SCG)
F16 High pressure sensor failure. High pressure trouble.
F17 Low-pressure sensor trouble
F23 Gas temperature sensor trouble at outdoor heat exchanger 2 (In)
F24 Liquid temperature sensor trouble at outdoor heat exchanger 2 (Out)
F31 Outdoor unit non-volatile memory (EEPROM) trouble
H01 Compressor 1 current trouble
H11 Constant speed compressor 2 overcurrent alarm
H12 Constant speed compressor 2 lock current alarm
H03 Compressor 1 CT sensor disconnected or short-circuit
H05 Compressor 1 discharge temperature sensor disconnected
H06 Low-pressure switch activated
H08 Compressor 1 oil detection sensor (connection) trouble
H13 Compressor 2 CT sensor disconnected or short-circuit
H15 Compressor 2 discharge temperature sensor disconnected
H27 Compressor 2 oil detection sensor (connection) trouble
H31 HIC trouble alarm
L04 Outdoor system address duplication
L10 Outdoor unit capacity not set
L11 Incorrect wiring of remote group control wiring (in case of shared solenoid valve kit)
L17 Outdoor unit model mismatch
P02 Compressor thermal protector is activated. (trip only and no alarm)
P03 Compressor 1 discharge temperature trouble
P04 High-pressure switch activated
P05 Reverse phase (or missing phase) detected
P14 O sensor (detects low oxygen level) activated
2
P16 Compressor 1 (INV) overcurrent
P17 Compressor 2 discharge temperature trouble
P22 Fan motor trouble
P29 Inverter compressor missing phase or lock alarm
Blinking Inspection Display on the remote
controller
Alarm meaning
CHECK blinking (1)
CHECK blinking (2)
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3WAY SYSTEM
Trouble Diagnosis
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