UPS KR Series
(
1~3KVA
)
User’s Manual
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22
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Troubleshooting
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Overview
In the case of device failure, first of all, find out any obvious damage and try to
determine what causes the failure: device problem or external environment
(such as temperature, humidity and load). Always check these external factors
before coming to the conclusion of UPS system damage.
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Troubleshooting
Only some simple troubleshooting suggestions are provided here. If the
diagnosis result is not certain or the information given here is not sufficient for
problem-solving, please turn to your local office or distributor for repair.
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Buzzer gives long buzzing, trouble light is on, UPS is powered through
bypass, and inverter fails.
Possible causes:(1) Output overload or short circuit results in UPS automatic
shutdown protection.
(2) Driving or power tube malfunction.
(3) Master control board failure.
(4) UPS Over-temperature protection
2
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UPS works properly when power supply is O.K., but it fails to function
during power failure.
Possible causes: (1) Battery failure.
(2) Battery charger malfunction: failing to charge battery
when power supply is O.K.
(3) Poor contact between battery connecting wires or
connecting terminals.
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Intermittent buzzing of the buzzer when UPS input is normal.
Possible causes: Abnormal input voltage that exceeds the UPS' allowable
input voltage range of power supply.
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UPS works well when computer is in operation. After power failure, UPS
works properly and the computer breaks down.
Summary of Contents for KR 3000L
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