KR series
（
6
-
10kVA
）
user
’s manual
- 39 -
5. Replace the used battery with new ones that are of same capacity same type and
same manufacturer. It is strictly prohibit to use the battery with different capacity,
type and manufacturers.
6. Dangerous voltage may exist between battery terminal and the ground. Test
before touching. Don’t touch two poles of the battery.
6.4 Fault diagnosis
6.4.1 FAQ
If the UPS fails to work properly after starting, please refer to the following table
6.4-1 to find the reason. Meantime, check if it is caused by external environment,
such as temperature, humidity are out of range or overload.
Table 6.4-1 just includes some simple fault diagnosis, if the diagnosis answer is not
very clear or the information is not enough to solve the problem, please contact
with Kehua local agency or distributor to deal with the matter.
Abnormal situation
Possible cause
[problem1] Utility is normal, UPS is
in the battery inversion status and the
buzzer alarm intermittently
Unstable AC power input as a result of poor contact of the
junction points, sockets or other connection parts of the electric
network feeder circuit connected to the UPS.
[problem 2] After UPS is installed,
close the breaker or power switch, the
fuse burn or tripping.
UPS three input wire connect incorrectly, for example, the connection of neutral
line or live line and earth line is reversed. Or three output wire is connect wrong.
[problem 3] After UPS start, the
output is 220/230VAC, but the UPS is
still working in the bypass status.
（
1
）
The load connected to the UPS is too heavy, which exceeds UPS output
rate capacity. It have to reduce the load or choose the UPS with higher capacity.
（
2
）
If it is a temporary bypass caused by the load start-up impact, and it can be
self-recovery, it treat as normal.
[problem 4] The output is normal after
UPS start, but when carry the load,
UPS stop output immediately
（
1
）
The load is too heavy to UPS or output short circuit. Reduce the load to an
adequate amount or check the cause of short circuit.
（
2
）
Start the load without following the starting up order: high power
equipment→small power equipment, it need to restart UPS. When UPS run
normally, start the load in the order of high power equipment→small power
equipment
