Manutenzione straordinaria - AMS-PPS8
78
HS-RC-C5E-AM-PPS_01.fm
00/0411
8.8 AMS-PPS8: module replacement
Passive Power Supply
Vista frontale
Status: – Main switch open (OFF)
Material: – Module AMS-PPS8I
(see Tab. 9.3 - CPU, power supplies
and power modules a pag. 93)
Equipment: – T-shaped 5-mm Allen wrench, length
250 mm
Preliminary procedures / notes
– Before replacing the module after diagnosing a non-functioning, we recommend
to check the efficiency status of the fuse (see Operating procedure (fuse status
check only) and Fuse fault symptoms and consequences).
Operating procedure (fuse status check only)
a. Lift the lower door covering the
cables and unscrew the fuse
carrier plug.
b. Check the fuse (F30) efficiency
status.
c. The fuse (F30) is of type:
– 30A, 600V, fast, 10.3 x 38 mm
Fuse fault symptoms and consequences
a. The fuse (F30) triggering cuts off the recovery resistance from the Bus-DC
causing the consequent overvoltage on the bus as well as error 7200, 7225, etc.
b. Such error can be caused also by the resistance connection interrupation or in
case of resistance fault (value equal to 14.96 ohm).
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