KR-RM Series(1
～
3kVA) UPS
User Manual
5
Use and Maintenance
All rights reserved ©Xiamen Kehua Hengsheng Co., Ltd.
27
Table5-2
UPS fault phenomenon and its possible reason
Fault phenomenon
Possible reason
Buzzer long beeps, the fault
indicator is on, UPS works in the
bypass status and the inverter is
fault.
1)
The output load is overload or short-circuit, UPS will shut
down automatically.
2)
Drive or power tube fault.
3)
Main control board fault.
4)
UPS over-temperature protection
Usually, UPS works normally.
When powering off, UPS can't
work.
1)
Battery fault.
2)
Battery charger fault. Usually, it can't charge battery.
3)
Battery wire doesn't connect well or the terminals aren't
firmly connected.
The input is normal, but the
buzzer still beeps intermittently.
The input voltage is abnormal, which is beyond the UPS
allowable range of the mains input voltage, and the input
frequency is abnormal.
When the load is computer,
everything works normally. But
when powering off, the computer
halts.
The grounding is unreliable for the floating voltage between
the neutral wire and the grounding wire is too high.
Indicators on the panel are all off.
The wiring for the display board is unreliable or fault.
If UPS failure, short press "
" button. It can view the UPS failure prompting on the LCD, which is
good for finding the fault source quickly.
The meaning of fault symbol is as shown in Table5-3.
Summary of Contents for KR-RM Series
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