Fujitsu AU G18LVLB Series Service Instruction page 65
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Also See for AU G18LVLB Series:
- Design & technical manual (253 pages) ,
- Service instruction (70 pages) ,
- Service instruction (122 pages)
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Trouble shooting 21
INDOOR UNIT Error Method:
Drain pump Error
Detective Actuators:
Indoor Unit Controller PCB Circuit
Float Switch
Forecast of Cause : 1. Float switch failure 2. Shorted connector/wire 3. Controller PCB failure
4. Drain pump failure 5. Hose clogging
Check Point 1 : Check Float Switch
Check operation of float switch. (any blocking by dust, etc.)
Remove Float switch and check ON/OFF switching operation
by using a meter.
>>If Float switch is abnormal, replace it.
OK
Check Point 2 : Check Connector and Wire
Check loose contact of CN9 and shorted wire (pinched wire).
>>Replace Float switch if the wire is abnormal
OK
Check Point 3 : Check Drain Hose
Check Drain Hose .
>>If there is Hose clogging. Please clear the clog.
OK
Check Point 4 : Check Controller PCB
If Check Point 1 ~ 3 do not improve the symptom, change
Controller PCB and execute the check operation again.
Indicate or Display:
Indoor Unit : Operation lamp: 5 time Flash,
Timer lamp: 3 time Flash
Economy lamp : Continuous flash.
ERROR CODE : [E : 53]
Detective details:
When Float switch is ON for more than 3 minutes.
ON
02-26
Outdoor unit :
PUMP
LOW
POWER
DOWN
NOISE
ERROR
(L1)
(L2)
(L3)
(L4)
MODE
5
15
2
OFF
PEAK
CUT
(L5)
(L6)
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Table of Contents
Troubleshooting
