Service manual

75
14
Troubleshooting
Diagnostic Procedure for Check Code
Check code Operation cause
[93]
TC1 sensor error
Indoor TC1 sensor alarm
Check connection of TC1 sensor (TC1 sensor: CN20), disconnection of circuit, and
characteristics of sensor resistance value.
If the sensor is normal, replace indoor P.C. board.
Check code Operation cause
[94]
TC2 sensor error
Indoor TC2 sensor alarm
Check connection of TC2 sensor (TC2 sensor: CN05), disconnection of circuit, and
characteristics of sensor resistance value.
If the sensor is normal, replace indoor P.C. board.
Is SW09 bit 1 of master
outdoor interface
P.C. board off (*1)?
No
Yes
No
Yes
Yes
Turn off SW09 bit 1 on interface
P.C. board of master outdoor unit.
It is normal.
Restart the operation.
Reset the power source and
execute automatic address.
Id [8F ] detected
Check interface P.C. board.
Check code Operation cause
[8F] 1. Address setup of outdoor unit was duplicated
Duplicated terminal outdoor 2. Interface P.C. board error
addresses
( *1) SW09 bit 1 on interface P.C. board of the
master outdoor unit is for outdoor address
setting.
OFF = Automatic addressing (factory set).
ON = Manual addressing.