90
Is SW09 bit 1 of master outdoor
interface PC board off (*1)?
Reset the power source and
execute automatic address.
Id [8F ] detected
Check interface PC board.
Turn off SW09 bit 1 on interface PC
board of master outdoor unit.
It is normal.
Restart the operation.
No
No
Yes
Yes
Yes
Check code Operation cause
[8F] 1. Address set-up of outdoor unit was duplicated
Server outdoor address incorrect 2. Interface PC board error
( *1) SW09 bit 1 on interface PC board of the master
outdoor unit is for outdoor address setting.
OFF = Automatic addressing (factory set).
ON = Manual addressing.
Troubleshooting
Diagnostic procedure for check code
Check code Operation cause
[93]
Indoor TC1 sensor short circuit alarm Indoor heat exchanger TC1 sensor error
Check connection of TC1 sensor (TC1 sensor: CN20), disconnection of circuit, and characteristics of sensor
resistance value.
If the sensor is normal, replace indoor PC board.
Check code Operation cause
[94]
Indoor TC2 sensor short circuit alarm Indoor heat exchanger TC2 sensor error
Check connection of TC2 sensor (TC2 sensor: CN05), disconnection of circuit, and characteristics of sensor
resistance value.
If the sensor is normal, replace indoor PC board.
14
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