Service Manual
Chapter 7 - Troubleshooting
Fuse Check List
7 - 12
3x3 UPS Troubleshooting
Issue 2 - November 2001
7.7 - Fuse Check List
Prior to any fault diagnosis, a serviceability check of the fuses is recommended. Failure of a fuse
can give an indication of a defective power device or component.
1.
Using the list shown in Table 7Ć3 check each fuse for serviceability.
2.
Determine the serviceability of any related component or PCB and repair or replace as
required.
3.
Replace the fuse with a serviceable item.
4.
Continue with any required fault diagnosis.
Table 7-3
Fuses
Fuse
Value
Function
Location
F1
32A
Battery Bank 1
F2
32A
Battery Bank 2
Batte F e F o t S itch Pa el
F3
32A
Battery Bank 3
Battery Fuses Front Switch Panel
F4
32A
Battery Bank 4
F1
125A
Primary DC bus +ve
U
P
S ti
S
Fi
7 5
F4
125A
Primary DC bus ćve
Upper Power Section See Figure 7Ć5
F2
125A
Secondary DC bus +ve
U
P
S ti
S
Fi
7 5
F3
125A
Secondary DC bus ćve
Upper Power Section See Figure 7Ć5
F1
1A
DC+ Input
A ilia DC DC Co e te PCB
F2
1A
DCć Input
Auxiliary DCĆDC Converter PCB
F1
10A
Input Phase R
F2
10A
Input Phase S
F3
10A
Input Phase T
Battery Charger PCB
F4
10A
B
y
g
F5
10A
Battery ć
F1
1A
Cooling Fan Protection
Fan PCB