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36
Check of outdoor thermistor
Measure
resistance
between CN 662
3 and 4.
No
Yes
Replace the
thermistor.
Measure
resistance
between CN 662
1 and 2.
Connect CN662.
Turn ON the power
supply and press
the EMERGENCY
OPERATION
switch.
Does the resistance
of thermistor have
the characteristics
on page 38?
No
Yes
Does the unit operate
10 minutes or more?
Replace the outdoor
electronic control P.C.
board.
Ok W1.
W1. It is thought defective contact of the connector.
Turn OFF the
power supply.
Discharge temperature
thermistor(RT62)
Ambient temperature
thermistor(RT63)
w Disconnect the connectors CN662 from the outdoor electronic control P.C. board.
(Check the characteristics of each thermistor.)
H
Check of LEV (Expansion valve)
G
With remote controller set toward the indoor unit, press
the OPERATE/ STOP(ON/ OFF) button and confirm
one beep tone.
LEV operates in full-opening
direction.
Is LEV coil properly fixed to
the body?
Ok
Do you hear LEV "click,
click·······"?
Do you touch LEV and feel
it vibrate?
Does the resistance of LEV coil
have the characteristics?
No
Yes
Yes
Yes
No
LEV (CN724)
WHT–RED
RED–ORN
YLW–BRN
BRN–BLU
Resistance
30.3 " ~ 37.0 "
Characteristics of LEV coil
No
Properly fix LEV coil to
the body.
Replace the outdoor
electronic control P.C. board.
NOTE : After check of LEV, do the undermentioned operations.
1. Turn OFF the power supply of the unit and turn ON again.
2. Press the RESET button on the remote controller.
Replace the
LEV coil.
1 During pressing the OPERATION SELECT button
and the TOO COOL button on the remote controller,
press the RESET button.
2 First, release the RESET button.
(After 3 seconds, confirm all displays of the remote
controller.)
3 Then release the OPERATION SELECT button.
1 During pressing the OPERATION SELECT
button and the TOO COOL button on the
remote controller, press RESET button.
2 First, release the RESET button.
(After 3 seconds, confirm all displays of the
remote controller.)
3 Then release the OPERATION SELECT button.
AMPM
CLOCK
˚F
AMPM
When OPERATION INDICATOR lamp flashes 6-time.
Thermistors in the outdoor unit are abnormal.
When OPERATION INDICATOR lamp flashes 10-time.
Cooling doesn’t operate.
OB311--2.qxp 04.1.13 10:01 AM Page 36