Filter
Top Products
Possible cause of malfunction
Thermistor
fault
Protective
device for
compressor is
activated
Indoor thermistor is either open
or damaged.
Outdoor thermistor is either
open or damaged.
Low oil level.
Oil sensor fault.
Indoor coil temp. sensor (E1)
Indoor coil temp. sensor (E2)
Indoor coil temp. sensor (E3)
Indoor suction air (room) temp. sensor (TA)
Indoor discharge air temp. sensor (BL)
Comp. No. 1 discharge gas temp. sens
or (DISCH1)
Comp. No. 2 discharge gas temp. sensor (DISCH2)
Outdoor No. 1 coil gas temp. sensor
(EXG1)
Outdoor No. 1 coil liquid temp. sensor
(EXL1)
Outdoor air temp. sensor (AIR TEMP)
Outdoor No. 2 coil gas temp. sensor (EXG2)
Outdoor No. 2 coil liquid temp. sensor (EXL2)
Current is not detected when comp. No. 1 is ON.
Overload current is detected.
Lock current is detected.
Current is
not detected when comp. No. 2 is ON.
Low pressure switch is activated.
EEP ROM on indoor unit PCB failure
Alarm
message
<<F01>>
<<F02>>
<<F03>>
<<F10>>
<<F11>>
F04
F05
F06
F07
F08
F12
F16
F17
F22
F23
F24
F29
F31
H03
H05
H15
H21
H22
H23
H25
H11
H12
H13
H06
H07
H08
H27
H28
(Disconnection, etc.)
High pressure sensor. Negative (defective) N phase.
EEP ROM on the main or sub outdoor unit PCB has failed.
Discharge gas temperature of the comp. No. 1 is not detected.
Temp. s
ensor is not seated at the sensor holder.
Discharge gas temperature of comp. No. 2 is not detected.
Protective device in outdoor unit
is activated.
P02
P03
P04
P05
P14
P17
P18
P22
P26
H31
P16
P29
Compressor thermal 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.)
Incorrect discharge temperature. (Comp. No. 1)
High pressure switch i
s activated.
Negative (defective) phase.
Incorrect discharge temperature. (Comp. No. 2)
Activation of
protective
device
Outdoor unit fan motor is unusual.
Inverter for compressor is unusual. (DC compressor does not
operate.)
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.)
Compressor running failure resulting from missing phase i
n the
compressor wiring, etc. (Start failure not caused by IPM or no gas.)
IPM trip (IPM current or temperature)
Compressor intake port temperature sensor (RDT)
Continued
Protective device for compressor
No. 3 is activated.
Protective device for compressor
No. 2 is activated.
Protective device for compressor
No. 1 is activated.
Low-pressure sensor failure
Compressor 3 discharge temp. sensor failure (DISCH3)
Compressor No. 3 current trouble (overcurrent)
Compressor No. 3 current trouble (locked)
Compressor No. 3 CT sensor disconnected or short circuit
Compressor No. 3 discharge temp. s
ensor disconnected
Oil sensor (connection) failure
Comp. No. 1 oil sensor
Comp. No. 2 oil sensor
O
2
sensor (detects low oxygen level) activated
Compressor 3 discharge temp. failure
Protective device in indoor unit
is activated.
<<P01>>
<<P09>>
<<P10>>
Thermal protector in indoor unit fan motor is activated.
Improper wiring connections of ceiling panel.
Float switch is activated.
P12
Operation of protective function of fan inverter.
83
07-007 W-2WAY_II_NA 1/23/07 6:09 PM Page 83