Alarm Code #310, #311, #312, #313
Model CPE52, 53, 14, 15, 15V, 16
Failure Disconnection (#310) or Short circuit (#311) of Supply air temperature sensor (TSUP),
Disconnection (#312) or Short circuit (#313) of Return air temperature sensor (TRET)
Countermeasure
<< Cause –(3) >>
Defective PCB – C board
< Check > ( Refer to Page F-1, 2, 3 )
Check the voltage between the following check pins on PCB-C board.
< Action >
Out of Range: Replace PCB-C board
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