MR33 Series (75K-600K) Modular UPS
User Manual
6 Maintenance and Troubleshooting
All rights reserved ©Kehua Hengsheng Co., Ltd.
101
A new battery should be with the same capacity, model, and manufacturer as the replaced one.
The battery with different capacity, different type and different manufacturer battery is strictly
forbidden to use together.
Dangerous voltage may exist in the battery terminal and grounding terminal, before touching,
please measure if there is dangerous high voltage, which is to avoid endanger human safety. It is
strictly forbidden to touch the two wiring pillars or the bare end of battery.
6.4 Troubleshooting
6.4.1 Common Abnormal Phenomena Diagnosis
If the UPS works abnormally after start, please refer to Table6-1 to find possible reason. Meanwhile,
check whether the fault is caused by external environment, such as temperature, humidity is not
accordance with the requirement or overload.
Table6-1only includes some simple diagnosis. If the diagnosis is not clear, or not sufficient to solve
the problem, please contact with local agency or dealer to deal with.
Table6-1
Troubleshooting
NO Abnormal phenomena
Possible reason
1
Mains normal, but UPS
works in battery inverting
status, the buzzer beeps
intermittently.
Each connection point, socket of grid circuit is not so good,
which causes the AC power supply input blocked.
2
After installation, close
breaker or power supply
switch, the fuse will fuse
or trip off.
The three-phase input wire is wrongly connected, such as
neutral wire and ground wire or live wire and grounding (case)
is wrongly connected or the three-phase output wire is wrongly
connected.
3
After startup, the UPS
outputs 220V AC power,
but the UPS works in
bypass status.
1.
The load it too large and exceed the rated output capacity of
the UPS. It needs to reduce load or select a UPS with larger
output capacity.
2.
If it is temporary bypass caused by the impact of load
startup, and it can recover to normal automatically, that is
normal.
Summary of Contents for MR33 Series
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