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
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 trouble in
outdoor P.C. board (I/F,
A3-IPDU or Fan IPDU).
• Check for external noise.
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 trouble in indoor
P.C. board.
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 trouble 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 trouble 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 trouble 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 trouble 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 trouble in outdoor
P.C. board (I/F).
F07 F07
I/F
TL1
sensor trouble
All stop Sensor resistance is infinity
or zero (open/short circuit).
•
Check connection of TL1
sensor connector.
•
Check resistance
characteristics of TL1
sensor.
• Check for trouble in outdoor
P.C. board (I/F).
01: TL1 sensor trouble
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
80
1 2 1
01 ○
02 ○
03 ○ ○
08 ○
09 ○ ○
0A ○ ○
0B ○ ○ ○
A3-IPDU Fan-IPDU
− 150−
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