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5 SERVICING
5.1 Fuse Replacement
There are no serviceable components in these PSU's other than to replace the fuses – see Fig. 5.1. These fuses must be replaced
only with those stated in the specification. If a fault occurs the PSU should be returned to the nearest ABB Service Centre, or
returned to the factory for repair.
Note. Suitable fuses may be obtained
from ABB with the following part numbers:
F1..............0231555 (400 mA cartridge)
F2 & F3....0231577 (250 mA 1500 A
F4.............0231599 1 A (F.B.) 250 V
6
hbc cartridge)
Replace fuse(s)
6
230 V
8
T1
115 V
10
L
F2 F3
Replace cover, connect to mains power source
4
and switch on.
Fig. 5.1 Changing Fuses
1
Remove the four screws and lift
2
off the cover.
3
F1
TB2
TB1
F4
D
+
–
C
N
E
AUX 10V
B
Switch off and disconnect
the mains supply
+
–
E
X
A
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