MULTI TYPE

Main
remote
controller
Check code
Outdoor 7-segment display
Check
code
Sub-code
AI-NET central
control
remote
controller
F08 F08 – 1b
F10 – – 0C
F11 – –
F12 F12 – A2
F13
F13
01: Compressor 1
side
02: Compressor 2
side
03: Compressor 3
side
43
F15 F15 – 18
F16 F16 – 43
F22 F22 –
F23 F23 – 43
F24 F24 – 43
Location
of
detection
I/F
Indoor
unit
Indoor
unit
I/F
IPDU
I/F
I/F
I/F
I/F
I/F
Description
TO sensor
error
Indoor TA
sensor error
Indoor TF
sensor error
TS1 sensor
error
TH sensor
error
Outdoor
temperature
sensor wiring
error (TE1,
TL)
Outdoor
pressure
sensor wiring
error (Pd, Ps)
TD3 sensor
error
Ps sensor
error
Pd sensor
error
System
status
All stop
Stop of
corresponding
unit
Stop of
corresponding
unit
All stop
All stop
All stop
All stop
All stop
All stop
All stop
Error detection
condition(s)
Sensor resistance is infinity
or zero (open/short circuit).
Sensor resistance is infinity
or zero (open/short circuit).
Sensor resistance is infinity
or zero (open/short circuit).
Sensor resistance is infinity
or zero (open/short circuit).
Sensor resistance is infinity
or zero (open/short circuit).
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.
Readings of high-pressure
Pd sensor and lowpressure
Ps sensor are
switched.
Output voltages of both
sensors are zero.
Sensor resistance is infinity
or zero. (open/short circuit)
Output voltage of Ps
sensor is zero.
Output voltage of Pd
sensor is zero (sensor
open-circuited).
Pd > 4.15MPa despite
compressor having been
turned off.
Check items (locations)
• Check connection of TO
sensor connector.
• Check resistance
characteristics of TO sensor.
• Check for defect in outdoor
P.C. board (I/F).
• Check connection of TA
sensor connector and wiring.
• Check resistance
characteristics of TA sensor.
• Check for defect in indoor P.C.
board.
• Check connection of TF
sensor connector and wiring.
• Check resistance
characteristics of TF sensor.
• Check for defect in indoor P.C.
board.
• Check connection of TS1
sensor connector.
• Check resistance
characteristics of TS1 sensor.
• Check for defect in outdoor
P.C. board (I/F).
• Defect in IGBT built-in
temperature sensor
➝ Replace A3-IPDU P.C.
board.
• Check installation of TE1 and
TL sensors.
• Check resistance
characteristics of TE1 and TL
sensors.
• Check for outdoor P.C. board
(I/F) error.
• 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.
• Check connection of TD3
sensor connector.
• Check resistance
characteristics of TD3 sensor.
• Check for defect in outdoor
P.C. board (I/F).
• 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.
• Check connection of Pd
sensor connector.
• Check for defect in Pd sensor.
• Check for defect in outdoor
P.C. board (I/F).
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