[8F] Server Outdoor Address Incorrect; [93] Indoor Tc1 Sensor Short Circuit Alarm; [94] Indoor Tc2 Sensor Short Circuit Alarm - Toshiba HFCR407C Service Manual

Check code
[8F]
Server outdoor address incorrect
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.
Check code
[93]
Indoor TC1 sensor short circuit alarm
14
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
[94]
Indoor TC2 sensor short circuit 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 PC board.
Troubleshooting
Diagnostic procedure for check code
No
Yes
Yes
No
Yes
Operation cause
1. Address set-up of outdoor unit was duplicated
2. Interface PC board error
Turn off SW09 bit 1 on interface PC
board of master outdoor unit.
It is normal.
Restart the operation.
( *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.
Operation cause
Indoor heat exchanger TC1 sensor error
Operation cause
Indoor heat exchanger TC2 sensor error
90