02-31
Detective Actuators:
Detective details:
Forecast of Cause :
Indoor unit Controller PCB Circuit
Limit switch
Damper
When limit switch were not able to detect the close though the damper close.
(Upper air flow)
When limit switch were not able to detect the open though the damper open.
(Upper & Lower air flow)
1. Limit switch failure 2. Shorted connector/ wire 3. Damper faulure
4. Controller PCB failure
Check Point 2 :
Check Point 2 : Check Connector (CN18) / Wire
Check Point 1 : Check Limit switch
Check Point 4 : Replace Controller PCB
OK
OK
OK
OK
Check operation of limit switch. (any blocking by dust, etc.)
Remove Limit switch and check ON/OFF switching operation by using a meter.
>>If Limit switch is detective, replace it.
Check loose contact of CN18 /shorted wire (pinched wire).
>>Replace Limit switch if the wire is abnormal
Check Point 2 :
Check Point 3 : Check Damper
OK
OK
>>Replace Damper if the damper is abnormal
If Check Point 1 3 do not improve the symptom, change Controller PCB.
Check the obstruction of damper movement.
Check the damper movement.
Trouble shooting 16
INDOOR UNIT Error Method:
Damper(OPEN/CLOSE) Detection
Limit Switch Error
Indicate or Display:
Indoor Unit
Outdoor Unit
Operation lamp : 5 time Flash
ERROR CODE : [E : 57]
Timer lamp
: 7 time Flash
: Light ON
: Light OFF
n : n time blinking
Monitor
A
B
C
D
E
F
5
15
