Ablerex 3 MS series User Manual page 30

5.7 Quick trouble shooting
INVERTER
fault
1.replace Q6, Q7,
U6, U7
2.Check R83 R104,
D12 and D13
if the UPS still fails to work. Please refer to the
detail trouble shooting guide
UPS MALFUNCTION
AC fuse is burnt
Q1 short
YES
Q6,Q7
short
DC fuse is burnt
Q10, Q12, Q15,
Q17, Q19, Q21 short
or low resistance
30
YES
NO
NO
YES
NO
PFC fault
1. Replace Q1, U3
2. check BD1, D11
and R42
Booster fault.
3. Replace Q10, Q12,
Q15, Q17, Q19,
Q21, R111, R123,
R134, R143, 148,
R154, U9 and/or F1.
4. CHECK D31-D34
and T2.