– 66 –
F08
F08
—
I/F
TO sensor error
All stop
Sensor resistance is infinity
or zero (open / short circuit).
• Check connection of TO sensor
connector.
• Check resistance characteristics of
TO sensor.
• Check for defect in outdoor P.C.
board (I/F).
Check code
Location
of
detection
Description
System status
Error detection
condition(s)
Check items (locations)
F10
—
—
Indoor unit Indoor TA sensor
error
Stop of
corresponding unit
Sensor resistance is infinity
or zero (open / short circuit).
• Check connection of TA sensor
connector and wiring.
• Check resistance characteristics of
TA sensor.
• Check for defect in indoor P.C.
board.
F11
—
—
Indoor unit Indoor TF sensor
error
Stop of
corresponding unit
Sensor resistance is infinity
or zero (open / short circuit).
• Check connection of TF sensor
connector and wiring.
• Check resistance characteristics of
TF sensor.
• Check for defect in indoor P.C.
board.
F12
F12
—
I/F
TS1 sensor error
All stop
Sensor resistance is infinity
or zero (open / short circuit).
• Check connection of TS1 sensor
connector.
• Check resistance characteristics of
TS1 sensor.
• Check for defect in outdoor P.C.
board (I/F).
F15
F15
—
I/F
Outdoor
temperature
sensor wiring
error (TE1, TL)
All stop
During compressor operation
in HEAT mode, TE1
continuously provides
temperature reading higher
than indicated by TL by at
least specified margin for 3
minutes or more.
• Check installation of TE1 and TL
sensors.
• Check resistance characteristics of
TE1 and TL sensors.
• Check for outdoor P.C. board (I/F)
error.
F16
F16
—
I/F
Outdoor pressure
sensor wiring
error (Pd, Ps)
All stop
Readings of high-pressure
Pd sensor and lowpressure
Ps sensor are switched.
Output voltages of both
sensors are zero.
• Check connection of highpressure
Pd sensor connector.
• Check connection of lowpressure
Ps sensor connector.
• Check for defect in pressure
sensors Pd and Ps.
• Check for error in outdoor P.C.
board (I/F).
• Check for deficiency in compressive
output of compressor.
F22
F22
—
I/F
TD3 sensor error
All stop
Sensor resistance is infinity
or zero. (open / short circuit)
• Check connection of TD3 sensor
connector.
• Check resistance characteristics of
TD3 sensor.
• Check for defect in outdoor P.C.
board (I/F).
F23
F23
—
I/F
Ps sensor error
All stop
Output voltage of Ps sensor is
zero.
• Check for connection error involving
Ps sensor and Pd sensor
connectors.
• Check connection of Ps sensor
connector.
• Check for defect in Ps sensor.
• Check for deficiency in compressive
output of compressor.
• Check for defect in 4-way valve.
• Check for defect in outdoor P.C.
board (I/F).
• Check for defect in SV4 circuit.
F24
F24
—
I/F
Pd sensor error
All stop
Output voltage of Pd sensor is
zero (sensor open-circuited).
Pd > 4.15 MPa despite
compressor having been
turned off.
• Check connection of Pd sensor
connector.
• Check for defect in Pd sensor.
• Check for defect in outdoor P.C.
board (I/F).
F29
—
—
Indoor unit Other indoor error Stop of
corresponding unit
Indoor P.C. board does not
operate normally.
• Check for defect in indoor P.C.
board (faulty EEPROM)
F31
F31
—
I/F
Outdoor EEPROM
error
All stop *1
Outdoor P.C. board (I/F) does
not operate normally.
• Check power supply voltage.
• Check power supply noise.
• Check for defect in outdoor P.C.
board (I/F).
H01
H01
01: Compressor
1 side
02: Compressor
2 side
03: Compressor
3 side
IPDU
Compressor
breakdown
All stop
Inverter current detection
circuit detects overcurrent and
shuts system down.
*1 Total shutdown in case of header unit
Continued operation in case of follower unit
• Check power supply voltage.
(380-415V ± 10 %).
• Check for defect in compressor.
• Check for possible cause of
abnormal overloading.
• Check for defect in outdoor P.C.
board (A3-IPDU).
F13
—
01: Compressor
1 side
02: Compressor
2 side
03: Compressor
3 side
IPDU
TH sensor error
All stop
Sensor resistance is infinity
or zero (open / short circuit).
• Defect in IGBT built-in temperature
sensor
→
Replace A3-IPDU P.C.
board.
Outdoor 7-segment display
Check
code
Sub-code
Main
remote
controller
