Service manual

6.3.1 Quick Start

Before any detail check of UPS, please check the components listed in the following table. This

action could help you find problem quickly and make following debug procedures go smoothly.

Related Circuit Block Components to be checked Component Type Fail condition

BAT FUSE 1K/3K:F1/F2; 2K:F1 Fuse Open

I/P FUSE (on PSDR) F3, Fuse Open

2K/3K:D16, D17, REC02

1K:D10, D11, REC1

Diode Short or open

PFC converter

2K/3K:Q09, 1K:Q14 IGBT C-E short or open

2K/3K:Q04, Q05, Q06, Q07

1K:Q4, Q6, Q10Q11

MOSFET D-S short or open

Push-Pull Booster

2K/3K:D05, D06, D07, D08

1K:D12, D13, D14, D15

Power Diode Short or open

Inverter

2K/3K:Q13, Q14, Q15, Q16

1K:Q12, Q13

IGBT C-E short or open

Q2 MOSFET D-S short or open

Charger module

D10, D11, D12, D13, D15

Power Diode Short or open

Q201 MOSFET D-S short or open

SPS module

D202, D203 Power Diode Short or open

If the fuse is open, replacing fuse only DOES NOT mean you have solved the problem. In

most case, open of fuse is caused by other failure of components; therefore, before restart

that UPS, you must find the real failure components and replace them!