– 64 –
Main
remote
control
Check code
E31
E31
I/F
IPDU
communication
trouble
All stop
Communication is disrupted
between IPDUs (P.C.
boards) in inverter box.
• Check wiring and connectors
involved in communication
between IPDU-I/F P.C. board for
bad contact or broken wire.
• Check for defect in outdoor P.C.
board (I/F, A3-IPDU or Fan IPDU).
• Check for external noise.
80
Communication
trouble between
MCU and Sub
MCU
All stop
Communication between MCU and
Sub MCU stopped.
• Operation of power supply reset
(OFF for 60 seconds or more)
• Outdoor I/F PC board trouble
check
F02
—
—
Indoor
unit
Indoor TC2
sensor trouble
Stop of
corresponding
unit
Sensor resistance is infinity or zero
(open/short circuit).
• Check connection of TC2 sensor
connector and wiring.
• Check resistance characteristics
of TC2 sensor.
• Check for defect in indoor P.C.
board.
F03
—
—
Indoor
unit
Indoor TC1
sensor trouble
Stop of
corresponding
unit
Sensor resistance is infinity or zero
(open/short circuit).
• Check connection of TC1 sensor
connector and wiring.
• Check resistance characteristics
of TC1 sensor.
• Check for defect in indoor P.C.
board.
F04
F04
—
I/F
TD1 sensor
trouble
All stop
Sensor resistance is infinity or zero
(open/short circuit).
• Check connection of TD1 sensor
connector.
• Check resistance characteristics
of TD1 sensor.
• Check for defect in outdoor P.C.
board (I/F).
F05
F05
—
I/F
TD2 sensor
trouble
All stop
Sensor resistance is infinity or zero
(open/short circuit).
• Check connection of TD2 sensor
connector.
• Check resistance characteristics
of TD2 sensor.
• Check for defect in outdoor P.C.
board (I/F).
F06
F06
01: TE1 sensor trouble
02: TE2 sensor trouble
I/F
TE1/TE2
sensor trouble
All stop
Sensor resistance is infinity or zero
(open/short circuit).
• Check connection of TE1/TE2
sensor connectors.
• Check resistance characteristics
of TE1/TE2 sensors.
• Check for defect in outdoor P.C.
board (I/F).
F07
F07
01: TL1 sensor trouble
02: TL2 sensor trouble
03: TL3 sensor trouble
I/F
TL1 sensor
trouble
All stop
Sensor resistance is infinity or zero
(open/short circuit).
• Check connection of TL1/TL2/TL3
sensor connector.
• Check resistance characteristics
of TL1/TL2/TL3 sensor.
• Check for defect in outdoor P.C.
board (I/F).
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).
F09
F09
I/F
01: TG1 sensor trouble
02: TG2 sensor trouble
TG1/TG2
sensor trouble
All stop
Sensor resistance is infinity or zero
(open/short circuit).
• Check connection of TG1/TG2
(open/short circuit).
• Check resistance characteristics
of TG1/TG2 sensors.
• 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.
F01
—
—
Indoor
unit
Indoor TCJ
sensor trouble
Stop of
corresponding
unit
Sensor resistance is infinity or zero
(open/short circuit).
• Check connection of TCJ sensor
connector and wiring.
• Check resistance characteristics
of TCJ sensor.
• Check for defect in indoor P.C.
board.
Outdoor 7-segment display
Check
code
Sub-code
Location
of
detection
Description
System status
Trouble detection
condition(s)
Check items (locations)
Circle (O): Faulty IPDU
Sub-
code
A3-
IPDU
Fan-
IPDU
1
01
02
03
04
05
06
07
08
09
0A
0B
0C
0D
0E
0F
11
12
13
18
19
1A
1B
O
O
O
O
O
O
O
O
O
O
O
O
2
O
O
O
O
O
O
O
O
O
O
O
O
3
O
O
O
O
O
O
O
O
1
O
O
O
O
O
O
O
O
O
O
O
O
2
O
O
O
O
O
O
O
