135
Set up address again.
(Refer to “8-4-3. Address setup
procedure”.)
No corresponding indoor unit
during automatic address
1. Communication line connection error between indoor and
outdoor
2. Indoor power system error
3. Noise from surrounding devices
4. Power failure
5. Indoor P.C. board error
Correct
communication line.
Correct connection of connector.
Correct connection of connector.
Correct power wire.
Set up address again after
resetting power supply.
Eliminate noise.
Are two remote
controls set up as two
header remote
controls?
Check code
Check code name
Cause
Duplicated hearder remote control
Setup of header remote control is duplicated.
Set up one control as the header and the
other follower.
(Remote control address connector)
Check remote control P.C. board.
Failure ➝ Replace
Check code
Check code name
Cause
Communication error between
indoor MCUs
Indoor P.C. board error.
Is there any trouble on
power line?
Check indoor control P.C. board.
Failure ➝ Replace
Check power voltage. Improve the
line condition. Eliminate noise, etc.
Check code
Check code name
Cause
Automatic address start error
1. Starting automatic addressing of indoor units during
automatic addressing in another refrigerant line.
(Sub-code: 01)
2. Starting automatic addressing of outdoor units during
automatic addressing of indoor units (Sub-code: 02)
Sub-code: 01: Communication between indoor and outdoor 02: Communication between outdoor units
Are U1, U2, U3, and
U4 connectors
connected?
Disconnect connector connection
of U1, U2, U3, and U4.
Turn on power of outdoor unit
again.
Is communication line
between indoor and
outdoor normal?
Check code
Check code name Cause
Is connection
of CN40 connector on
indoor P.C. board
correct?
Is
connection of
CN01connector on I/F P.C. board
of header outdoor unit
correct?
Is there any connection
error of power wire?
Did a power failure
occur?
Is there no noise source?
Set up address again after resetting
power supply.
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