119
E09
–
–
Remote
controller
Duplicated
master remote
controller
Stop of
corresponding
unit
In two remote controller
configuration (including
wireless), both controllers are
set up as master. (Header
indoor unit is shut down with
alarm, while follower indoor
units continue operating.)
Check remote controller
settings.
Check remote controller
P.C. boards.
E10
–
–
Indoor
unit
Indoor inter-
MCU
communication
error
Stop of
corresponding
unit
Communication cannot be
established / maintained
upon turning on of power or
during communication.
Check for trouble in indoor
P.C. board.
E12
E12
–
I/F
Automatic
address starting
trouble
All stop
Indoor automatic address
setting is started while
automatic address setting for
equipment in other refrigerant
line is in progress.
Perform automatic address
setting again after
disconnecting
communication cable to
that refrigerant line.
E15
E15
–
I/F
Indoor unit not
found during
automatic
address setting
All stop
Indoor unit cannot be
detected after indoor
automatic address setting is
started.
Check connection of
indoor-outdoor
communication line.
Check for trouble in indoor
power supply system.
Check for noise from other
devices.
Check for power failure.
Check for trouble in indoor
P.C. board.
E16
E16
00:
Overloading
01-:
No. of units
connected
I/F
Too many
indoor units
connected
All stop
Combined capacity of
indoor units exceeds
130 % of combined
capacity of outdoor units.
Note:
If this code comes up
after backup setting for
outdoor unit failure is
performed, perform “No
overloading detected”
setting.
<“No overloading detected”
setting method>
Turn on SW09 / Bit 2 on I/F
P.C. board of outdoor unit.
More than 13 indoor units
are connected.
Check capacities of indoor
units connected.
Check combined HP
capacities of indoor units.
Check HP capacity
settings of outdoor units.
Check No. of indoor units
connected.
Check for trouble in outdoor
P.C. board (I/F).
E18
–
–
Indoor
unit
Trouble in
communication
between indoor
header and
follower units
Stop of
corresponding
unit
Periodic communication
between indoor header and
follower units cannot be
maintained.
Check remote controller
wiring.
Check indoor power supply
wiring.
Check P.C. boards of
indoor units.
E20
E20
01:
Connection of
outdoor unit
from other line
02:
Connection of
indoor unit from
other line
I/F
Connection to
other line found
during
automatic
address setting
All stop
Equipment from other line is
found to have been
connected when indoor
automatic address setting is
in progress.
Disconnect inter-line tie
cable in accordance with
automatic address setting
method explained in
“Address setting” section.
1
3
E
1
3
E
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.
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
O
Fan IPDU
02
O
03
O
O
04
O
05
O
O
06
O
O
07
O
O
O
Check code
01
1
(Upper)
2
(Lower)
A3-
IPDU
Circle (O): Troubled IPDU
108
A10-1510.indb 108
A10-1510.indb 108
2016/04/08 17:21:07
2016/04/08 17:21:07
