Check code
Location
of
detection
Description
System
status
Trouble
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 defect 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 defect 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 defect in indoor P.C.
board.
F12 F12
I/F
TS1/TS3
sensor
trouble
All stop
Sensor resistance is infinity
or zero (open/short circuit).
•
Check connection of TS1/
TS3 sensor connector
• Check resistance
characteristics of TS1
/TS3
sensor.
• Check
for defect
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).
• Defect in
IPM
built-in
temperature sensor
Replace A3-IPDU P.C.
board.
F15 F15
–
I/F
Outdoor
temperature
sensor wiring
trouble
(T
E
1,
TL
1
)
All stop
During compressor
operation in HEAT mode,
T
L
1 continuously provides
temperature reading higher
than indicated by TL
1
by at
least specified margin for 3
minutes or more.
• Check installation of
T
E
1 and TL
1
sensors.
• Check resistance
characteristics of TE1 and TL
1
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 error 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 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
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 defect in Pd sensor.
• Check for defect in outdoor
P.C. board (I/F).
• Check connection of TG1/TG2
sensor connectors.
• Check resistance characteristics
of TG1/TG2 sensors.
• Check for defect in outdoor P.C.
board (I/F).
Sensor resistance is infinity
or zero (open/short circuit).
All stop
TG
1
/
TG2
sensor
trouble
I/F
F0
9
F0
9
01:
TG1
se
n
sor
trouble
02:
TG2
se
n
sor
trouble
01:
TS1
se
n
sor
trouble
0
3
:
TS3
se
n
sor
trouble
−
67
−
AMP Air Conditioning
www.ampair.co.uk | [email protected]
