80
3. Trouble shooting
(1) In case of being indicated irregularity on the self diagnoses
No
Phenomenon
Cause
Countermeasure
29
Remote controller interface
signal error
Mis-wiring of the Interface
P.C.board.
Reinsert the wiring connector of the Interface
P.C.board.
Trouble of the Interface P.C.board. Exchange the Interface P.C.board.
Trouble of the Indoor P.C.board.
Exchange the Indoor P.C.board.
28
Mis-wiring
Wiring between the indoor and
outdoor is coming off.
Check the wiring out between the indoor and out-
door.
Difference of wiring polarity
between the indoor and outdoor.
Indoor-outdoor
signal error
Trouble of the outdoor deicer
P.C.board.
Check the deicer P.C.board out.
Trouble of the Indoor P.C.board.
Exchange the Indoor P.C.board.
27
Indoor coil thermistor
Mis-connecting of the Indoor coil
thermistor.
Reinsert the connector (CN112).
Trouble of the Indoor coil
thermistor.
Room temperature
thermistor
Trouble of the Indoor P.C.board.
Check the resistance value of the thermistor.
Mis-connecting of the room
temperature thermistor.
Exchange the Indoor P.C.board.
Reinsert the connector (CN113).
Trouble of the room temperature
thermistor.
Trouble of the Indoor P.C.board.
Exchange the Indoor P.C.board.
Check the resistance value of the thermistor.
26
Outdoor thermistor
Mis-connecting of the Outdoor
thermistor.
Reinsert the connector (CN661).
Trouble of the Outdoor thermistor.
Trouble of the deicer P.C.board.
Check the resistance value of the thermistor.
Exchange the deicer P.C.board.
OC281-B-3.qxp 04.2.10 2:23 PM Page 80