Fujitsu AS*9LSACW Service Instructions Manual page 50

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?
(3) Check if each connector is inserted securely.
[Checking Flow Chart]
Is AC input voltage from AC outlet normal ?
Is AC voltage between VA 1 normal?
Is DC voltage between terminal of C5 normal?
Is DC voltage between terminals of C7 and C12
Is DC voltage between terminal 1 & 2 of IC6 normal?
Is DC voltage between terminals of C9
Is DC voltage between terminals 3 & 4 of IC7 normal?
YES
YES
YES
YES
YES
YES
YES (Pulse wave of DC5Vp-p)
Controller PCB defective
(AC220/230V)
(AC220/230V)
(AC220/230V)
(C7:DC20V)
(C12:DC13.5 1V)
(DC12 14V)
(DC15V)
07-01
NO
Input power supply failure
NO
Switching power circuit
(F1, VA1 defective)
NO
Switching power circuit
(F2, D1, R1 defective)
NO
Switching power circuit
(IC2, T1 or IC3 defective)
NO
Terminal board temperature
fuse is blown or CN1 is loose
NO
IC4 defective
NO
IC7 defective