Check code
Location
of
detection
Description
System
status
Check code detection
condition(s)
Check items (locations)
Main
remote
controller
Outdoor 7-segment display
Check
code
Sub-code
F08 F08 –
I/F TO sensor
trouble
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 trouble in outdoor
P.C. board (I/F).
F10 – –
Indoor
unit
Indoor TA
sensor trouble
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 trouble in indoor
P.C. board.
F11 – –
Indoor
unit
Indoor TF
sensor trouble
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 trouble in indoor
P.C. board.
F12 F12
I/F
TS1/TS2
sensor trouble
All stop Sensor resistance is infinity
or zero (open/short circuit).
• Check connection of TS1/
TS2 sensor connector
• Check resistance
characteristics of TS1/TS2
sensor.
• Check for trouble
F13 F13
01: Compressor 1 side
02: Compressor 2 side
IPDU TH sensor
trouble
All stop Sensor resistance is infinity
or zero (open/short circuit).
• Trouble in IPM built-in
temperature sensor
Replace A3-IPDU P.C.
board.
F15 F15 –
I/F Outdoor
temperature
sensor wiring
trouble (TE1,
TL1)
All stop
During compressor
operation in HEAT mode,
TL1 continuously provides
temperature reading higher
than indicated by TL1 by at
least specified margin for 3
minutes or more.
•
Check installation of
TE1 and TL1 sensors.
• Check resistance
characteristics of TE1 and TL1
sensors.
• Check for outdoor P.C.
board (I/F) trouble.
F16 F16 –
I/F Outdoor
pressure
sensor wiring
trouble
(PD, PS)
All stop
Readings of high-
pressure PD sensor and
low-pressure PS sensor
are switched.
Output voltages of both
sensors are zero.
• Check connection of high-
pressure PD sensor connector.
•
•
Check connection of low-
pressure PS sensor connector.
Check for defect in pressure
sensors PD and PS.
• Check for trouble in outdoor
P.C. board (I/F).
• Check for deficiency in
compressive output of
compressor.
F23 F23 –
I/F
PS sensor
trouble
All stop
Output voltage of
PS sensor is zero.
• Check for connection trouble
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 trouble in 4-way
valve.
• Check for trouble in outdoor
P.C. board (I/F).
• Check for trouble in SV4 circuit.
F24 F24 –
I/F
PD sensor
trouble
All stop
Output voltage of PD
sensor is zero (sensor
open-circuited).
Pd > 4.15MPa despite
compressor having been
turned off.
• Check connection of PD
sensor connector.
• Check for trouble in PD
sensor.
• Check for trouble in outdoor
P.C. board (I/F).
01: TS1 sersor trouble
02: TS2 sersor trouble
− 151 −
Indoor unit
TOA sensor
trouble
Stop of
corresponding
unit
Sensor resistance is infinity
or zero (open/short circuit).
F17
• Check connection of TOA
sensor connector.
• Check resistance
characteristics of TOA sensor.
• Check for trouble in outdoor
I/F P.C. board.
Indoor unit
TRA sensor
trouble
Stop of
corresponding
unit
Sensor resistance is infinity
or zero (open/short circuit).
F18
• Check connection of TRA
sensor connector.
• Check resistance
characteristics of TRA sensor.
• Check for trouble in outdoor
I/F P.C. board.
–
–
–
–
To Next Page
Loading...
