Fujitsu AG * V12LAC Series, Service Instruction

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When does not operate at all (Operation Lamp and Timer Lamp do not light up)
[Check Point]
(1) Is the input power voltage from the exclusive circuit AC outlet normal?
(2) Is the AC plug inserted to the AC outlet securely and not loose?
(4) Check if each connector is inserted securely.
[Checking Flow Chart]
YES (AC220/230V)
YES (AC220/230V)
YES (AC208/230V)
( L1, L2, D1 defective )
( IC8, T1, IC15, IC19 defective )
YES (DC5V)
YES (DC5Vp-p, Pulse wave of 50 or 60Hz)
Controller PCB defective
NO
NO
NO
NO
NO
NO
NO
( F1, VA1 defective )
07-01
(3) Does not connected cable do wrong wiring?
YES (DC260 400V)
Is AC input voltage between terminal 1-2 normal ? Fault of an input power supply.
Is AC voltage between 4pin of TM1 and TM5 normal? Temp fuse defective
Is AC voltage between VA1 normal? Switching power circuit
Switching power circuit
Switching power circuit
Is DC voltage between terminals of C9 normal?
Is DC voltage between terminals of C12 normal?
Is DC voltage between terminals of C14 normal? IC2 defective
Is DC voltage between terminal 3 & 4 of IC26 normal? IC26 defective
(The power supply is not supplied to an outdoor unit
terminal board.)
(The connection mistake of an outdoor unit terminal board.)
(Outdoor unit F202 open)
YES (DC15V)
NO
Is DC voltage between terminals of C17 normal?
IC20 defective
YES (C7:DC20, C12:DC13.5V 1V)