Daikin LX10F10A, Service Manual

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2-25
004 F401
・
F405
・
F407
・
F409
Alarm
Logic
and
Possible
Causes
F401 Multiple sensor (SS,DSS,RS) failure in chilled mode
F405 Multiple sensor (HPT,DCHS1,DCHS2) failure
F407 Multiple sensor (HPT,LPT) failure
F409 Multiple sensor (LPT,DCHS1,DCHS2) failure
Trouble
Shooting
The unit cannot perform backup operation and cannot be controlled.
Replace each abnormal sensor.
Controller
Action
F401, F405, F407, F409 Unit stop
005 F701
・
E701
Alarm
Logic
F701
① Abnormal power voltage is detected within 2 seconds after power on. ( ≧ 530V or ≦ 300V)
② One of R, S or T phase missing after power on (S phase is missing in case F701 is generated
also.)
E701
③ Abnormal power voltage is detected during operation. ( ≧ 530V or ≦ 300V)
④ One of R, S or T phase missing during operation (S phase is missing in case F701 is
generated also.)
Possible
Causes
Power voltage remains more than upper limit ( ≧ 530V) or lower than lower limit ( ≦ 300V).
One of R,S,T phase missing
Trouble
Shooting
①、③ Power check
1. Check if the actual power supply remains in allowable
range (300V 〜 530V).
1. Supply power voltage within
allowable range Electrical parts
may have damages.
②、④ Check R,S,T phase missing
2.1 Check if there is missing phase in the primary side
(Power side) of circuit breaker
2.2 Check if there is broken wire (open) in the secondary
side of circuit breaker
＊ Between C/B 〜 X63A (PT/CT board)
＊ Between C/B 〜 Tr1 〜 X30A (I/O board)
2.1 Repair or replace if there is a
problem in power plug or cable
Provide specified power supply if
there is missing phase in power
supply
2.2 Repair if there is broken wire
(open) in the secondary side of
circuit breaker
Controller
Action
F701 Unit stop
E701 Restart after 3 minutes standby × 9 times retry
Retry after 4 hours standby