56
9
TROUBLESHOOTING
1. Cautions on troubleshooting
(1) Before troubleshooting, check the followings:
1
Check the power supply voltage.
2
Check the indoor/outdoor connecting wire for mis-wiring.
(2) Take care the followings during servicing.
1
Before servicing the air conditioner, be sure to first turn off the remote controller to stop the main unit, and then turn
off the breaker.
2
When removing the electronic control P.C. board, hold the edge of the board with care NOT to apply stress on the
components.
3
When connecting or disconnecting the connectors, hold the housing of the connector. DO NOT pull the lead wires.
Operation lamp
2. Trouble display
Blinking frequency of operation lamp shows the details of trouble in case trouble happens while indoor and
outdoor units.
Mis-wiring
1
blinking
2
blinking
Indoor-outdoor
signal error
Wiring between the indoor and
outdoor is coming off.
Difference of wiring polarity
between the indoor and outdoor.
Trouble of the outdoor deicer
P.C. board.
Check the wiring out between the indoor and
outdoor.
Check the deicer P.C.board out.
Trouble of the Indoor controller
board.
Exchange the Indoor controller board.
Indoor coil thermistor
Mis-connecting of the Indoor coil
thermistor.
Reinsert the connector (CN21).
Trouble of the Indoor coil
thermistor.
Trouble of the Indoor controller
board.
Exchange the Indoor controller board.
Check the resistance value of the thermistor.
Room temperature
thermistor
Mis-connecting of the room
temperature thermistor.
Reinsert the connector (CN20).
Trouble of the room temperature
thermistor.
Trouble of the Indoor controller
board.
Exchange the Indoor controller board.
Check the resistance value of the thermistor.
Drain sensor
Mis-connecting of the indoor drain
sensor
Reinsert the connector (CN31).
Trouble of the indoor drain sensor
Trouble of the Indoor controller
board.
Exchange the Indoor controller board.
Check the resistance value of the thermistor.
Phenomenon
Blinking
frequency
Cause
Countermeasure
(1) Incase of being indicated irregularity on the self diagnoses.
To be continued on the next page.
OC280-B-2.qxp 03.5.23 2:55 PM Page 56
Содержание SL Series
Страница 73: ...OC280 B 3 qxp 03 5 23 1 07 PM Page 73 ...