5
Use and Maintenance
KR-RM Series(1
～
3kVA) UPS
User Manual
26
All rights reserved ©Xiamen Kehua Hengsheng Co., Ltd.
Phenomenon
Possible reasons
recover automatically
When starting UPS, the display and
output
are
normal.
But
when
connecting with load, it will stop
outputting immediately.
UPS is serious over-load or the output circuit is
short-circuit. It should reduce load to the proper capacity
or find the short-circuit reason. The common reason is
that the output changeover socket is short-circuit or when
UPS damages, the input is short-circuit.
It doesn't follow the startup sequence that "high power
device
→
small power device" to start load. Restart
UPS. When UPS works steadily, start the high power
device first, and start the smaller power successively.
When starting UPS, it works normally.
After some time, UPS will shut down
automatically.
As batteries has not been charged in time and UPS works
in the battery status(mains powers off or it doesn't
connect with mains), UPS takes the battery under-voltage
protection.
Warning: when UPS takes the battery under-voltage
protection, switch off all switches in time. When the
mains works normally again, restart UPS to fully
charge battery. If the battery in the under-voltage
status for a long time, it will affect the working life.
When starting UPS, it works normally.
When mains grid powers down, UPS
has no output.
Batteries have not connected with UPS or batteries has
damaged seriously.
5.7 Troubleshooting
5.7.1 Overview
When there has a fault, find the obvious damage first and determine whether the fault is made by
system or external environment(e.g. temperature, humidity and load). Check the external factors
every time before judging the UPS is damaged.
5.7.2 Troubleshooting
As shown in Table5-2, it only includes some easy fault diagnosis. If the solution isn't clear or the
obtained information isn't enough to solve problems, contact the local office or distributor for details.
Summary of Contents for KR-RM Series
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