– 48 –
Check code
Location
of
detection
Description
System status
Error detection
condition(s)
Check items (locations)
Note:
Do not set outdoor
addresses manually.
I/F
—
Duplicated
follower outdoor
address
All stop
There is duplication in
outdoor addresses set
manually.
E25
E25
• Backup setting is being
used for outdoor units.
• Check power supply to
outdoor unit. (Is power
turned on?)
• Check connection of tie
cables between outdoor
units for bad contact or
broken wire.
• Check communication
connectors on outdoor
P.C. boards.
• Check for defect in outdoor
P.C. board (I/F).
I/F
Address of
outdoor unit
from which
signal is not
received
normally
Dropping out of
outdoor unit
All stop
Outdoor unit initially
communicating normally fails
to return signal for specified
length of time.
E26
E26
• Check check code
displayed on outdoor
follower unit.
<Convenient functions>
If SW04 is pressed and held
for at least 1 second while
[E28] is displayed on the 7-
segmentdisplay of outdoor
header unit, the fan of the
outdoor unit that has been
shut down due to an error
comes on.
If SW04 and SW05 are
pressed simultaneously, the
fans of normal outdoor units
come on.
To stop the fan or fans,
press SW05 on its own.
I/F
Detected
outdoor unit No.
Outdoor
follower unit
error
All stop
Outdoor header unit receives
error code from outdoor
follower unit.
E28
E28
• 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.
I/F
SMMS-i
(Series 4)
Symbol O
signifies site of
IPDU error.
IPDU
communication
error
All stop
Communication is disrupted
between IPDUs (P.C.
boards) in inverter box.
E31
E31
• Check connection of TCJ
sensor connector and
wiring.
• Check resistance
characteristics of TCJ
sensor.
• Check for defect in indoor
P.C. board.
Indoor
unit
—
Indoor TCJ
sensor error
Stop of
corresponding unit
Sensor resistance is infinity
or zero (open / short circuit).
F01
—
• Check connection of TC2
sensor connector and
wiring.
• Check resistance
characteristics of TC2
sensor.
• Check for defect in indoor
P.C. board.
Indoor
unit
—
Indoor TC2
sensor error
Stop of
corresponding unit
Sensor resistance is infinity
or zero (open / short circuit).
F02
—
Main
remote
controller
Outdoor 7-segment display
Check
code
Sub-code
A3-IPDU Fan
IPDU
1 2 3
O
O
O
O
O
O
O
O
01
02
03
04
05
06
07
08
09
0A
0B
0C
0D
0E
0F
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
Indoor unit (including Hot Water Module)
