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Test Run
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6. Meaning of Alarm Messages
Possible cause of malfunction
Alarm
Message
Activation of
protective
device
Protective device in outdoor unit
is activated.
Compressor therminal protector is activated.
Power supply voltage is unusual. (The voltage is more than 260 V or less
than 160 V between L1 and L2 phase.)
P02
Incorrect discharge temperature. (Comp. No. 1) P03
High pressure switch is activated. P04
Negtive (defective) phase. P05
Compressor running failure resulting from missing phase in the
compressor wiring, etc. (Start failure not caused by IPM or no gas.)
P16
Incorrect discharge temperature. (Comp. No. 2) P17
Compressor 3 discharge temp. failure P18
Outdoor unit fan motor is unusual. P22
Overcurrent at time of compressor runs more than 80Hz (DCCT
secondary current or ACCT primary current is detected at a time other
than when IPM has tripped.)
P26
IPM trip (IPM current or temperature) H31
Inverter for compressor is unusual. (DC compressor does not operate.) P29
Thermistor fault Indoor thermistor is either open
or damaged.
Indoor coil temp. sensor (E1) <<F01>>
Indoor coil temp. sensor (E2) <<F02>>
Indoor coil temp. sensor (E3) <<F03>>
Indoor suction air (room) temp. sensor (TA) <<F10>>
Indoor discharge air temp. sensor (BL) <<F11>>
Outdoor thermistor is either
open or damaged.
Comp. No. 1 discharge gas temp. sensor (DISCH1) F04
Comp. No. 2 discharge gas temp. sensor (DISCH2) F05
Outdoor No. 1 coil gas temp. sensor (EXG1) F06
Outdoor No. 1 coil liquid temp. sensor (EXL1) F07
Outdoor air temp. sensor (AIR TEMP) F08
Compressor intake port temperature sensor (RDT) F12
High pressure sensor. Negative (defective) N phase.
F16
Low-pressure sensor failure F17
Compressor 3 discharge temp. sensor failure (DISCH3) F22
Outdoor No. 2 coil gas temp. sensor (EXG2) F23
Outdoor No. 2 coil liquid temp. sensor (EXL2) F24
EEP ROM on indoor unit PCB failure F29
Protective
device for
compressor is
activated
Protective device for
compressor No.1 is activated.
EEP ROM on the main or sub outdoor unit PCB has failed. F31
Current is not detected when comp. No. 1 is ON. H03
Discharge gas temperature of the comp. No. 1 is not detected.
Temp. sensor is not seated at the sensor holder.
H05
Protective device for
compressor No.2 is activated
Overload current is detected. H11
Lock current is detected. H12
Current is not detected when comp. No.2 is ON. H13
Discharge gas temperture of comp. No.2 is not detected. H15
Protective device for
compressor No.3 is activated.
Compressor No.3 current trouble (overcurrent) H21
Compressor No.3 current trouble (locked) H22
Compressor No.3 CT sensor disconnected or short circuit H23
Compressor No.3 discharge temp. sensor disconnected H25
Low pressure switch is activated. H06
Low oil level. H07
Oil sensor fault.
(Disconnection, etc.)
Comp. No.1 oil sensor H08
Comp. No.2 oil sensor H27
Oil sensor (connection) failure H28
Continued
