R&D – SERVICE MANUAL DT0488
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3.1.2 UPS-20-30KVA
Refer to Fig.6/7 UPS 20-30kVA LEFT/RIGHT SIDE electronic parts LAYOUT
TAB.3
Fuse Value Protection
of
Location
F1-F3 100A
690V
Positive Battery Input
Positive DC BUS
Right side Heatsink
UPS 20-30kVA
F2-F4 100A
690V
Negative Battery Input
Negative DC BUS
Left side Heatsink
UPS 20-30kVA
If you find one or more fuses blown, you have to check firstly
ALL the POWER semiconductors on the UPS