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
P26
P26
01: Compressor 1 side
02: Compressor 2 side
IPDU
IPM
short-
circuit protection
trouble
All stop
Overcurrent is momentarily
detected during startup of
compressor.
•
•
Check connector
connection and wiring on
A3-IPDU P.C. board.
Check for
trouble
in
compressor (layer short-
circuit).
Check for
trouble
in
outdoor P.C. board
(A3-IPDU).
P29
P29
01: Compressor 1 side
02: Compressor 2 side
IPDU
Compressor
position
detection circuit
trouble
All stop
Position detection is not
going on normally.
• Check wiring and
connector connection.
• Check for compressor
layer short-circuit.
• Check for
trouble
in A3-
IPDU P.C. board.
–
P31
–
Indoor
unit
Other indoor
trouble
(group follower
unit
trouble
)
Stop of
corresponding
unit
There is
trouble
in other
indoor unit in group,
resulting in detection of
E07/L07/L03/L08.
• Check indoor P.C. board.
•
Check fan motor.
•
Check for
trouble
in fan
IPDU
P.
C. board.
• Check fan motor.
• Check connection of fan
motor connector.
• Check for
trouble
in fan IPDU
P.
C. board.
•
Check fan motor.
•
Check for
trouble
in fan
IPDU
P.
C. board.
• Check fan motor.
• Check connection of fan
motor connector.
Check for
trouble
in fan
IPDU
P.C. board.
•
•
Check power voltage of
the main power supply.
•
Check for defect in fan IPDU
•
Check connection of fan
IPDU P.C. board.
(Sub code:
1
0)
Fan IPDU over current
protection circuit
Flow of current equal to or
greater than the specified
value is detected during
startup of the fan.
(Sub code:
1
1)
Fan IPDU position
detection circuit Position
detection is not going on
normally.
(Sub code:
1
3)
Gusty wind, an obstruction,
or another external factor
Speed estimation is not
going on normally.
(Sub code:
1
4)
Fan IPDU over current
protection circuit
Flow of current equal to or
greater than the specified
value is detected during
operation of the fan.
(Sub code:
1
C)
Higher temperature than
the specified value is
detected during operation
of the fan.
(Sub code:
1
D)
The resistance value of
the sensor is infinite or
zero (open or short circuit).
(Sub code:
1
E)
Fan IPDU DC voltage
protection circuit
The DC voltage higher or
lower than the specified
value is detected.
All stop
All stop
All stop
All stop
All stop
All stop
All stop
IPDU
Outdoor fan
IPDU
trouble
1
0:Element short circuit
1
1:Position detection circuit
trouble
1
3:Motor lock
trouble
1
4:Motor current
trouble
1
C:
TH sensor
temperature
trouble
1
D:
TH sensor
short
circuit/release
trouble
1
E:Vdc voltage
trouble
P22
P22
Check fan motor.
Check for
trouble
in fan
IPDU
P.
C. boar
d
Check for
trouble
in
fan
IPDU P.C. board.
P.C. board.
•
•
•
•
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