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 defect in outdoor
P.C. board (I/F).
F06
F06
01:
TE1 sensor
trouble
I/F
TE1
sensor
trouble
All stop
Sensor resistance is infinity
or zero (open/short circuit).
•
•
Check connection of TE1
sensor connector.
Check resistance
characteristics of TE1
sensor.
• Check for
trouble
in outdoor
P.
C. board (I/F).
F07
F07
I/F
TL
1/TL3
sensor
trouble
All stop
Sensor resistance is infinity
or zero (open/short circuit).
•
•
Check connection of TL1/
TL3 sensor connector.
Check resistance
characteristics of
TL1/TL3
sensor.
• Check for
trouble
in outdoor
P.
C. board (I/F).
0
1:
TL1
sensor
trouble
03: TL3
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
80 : Communication
trouble
between
MCU and Sub MCU
1
2
1
01
○
02
○
03
○
○
08
○
09
○
○
0A
○
○
0B
○
○
○
A3-IPDU
Fan
IPDU
Circle (O):
Troubled
IPDU
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