29
English
User’s Manual IUPS-401-Series
6. Troubleshooting
Failure:
Although the computer is connected and switched on,
the IUPS shows neither function nor alarm
Possible cause:
Wrong installation
Possible countermeasure:
1. Disconnect mains
2. Check the whole installation according
to the instruction
Failure:
None of the LEDs is on
Possible cause:
1. No mains voltage
2. UPS is switched off
3. Fuse is defect
4. No UPS function
Possible countermeasure:
1. Check mains voltage
2. Switch on UPS at the (front panel) button
3. Call service staff
Failure:
Permanent sound, LED red
Possible cause:
Overload at the UPS output
Possible countermeasure:
Reduce load
Failure:
PC system crash after mains power failure
Possible cause:
1. Battery capacity too low
2. Battery defect
Possible countermeasure:
1. Charge IUPS for at least 8 hours
2. Have battery replaced by service staff
