UPS-Teknik KR1000 Manuel d'utilisateur télécharger pdf (Page 28)

UPS KR Series 1~3KVA User’s Manual

7 Troubleshooting

1 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.

2 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.

1 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 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.

3 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.

4 UPS works well when computer is in operation. After power failure, UPS

works properly and the computer breaks down.

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UPS-Teknik KR1000 Manuel d'utilisateur Page 28