Below is a detailed introduction to common UPS faults and their solutions.

1. When the mains power is available, UPS will issue a power outage alarm.

Possible reasons:

1) The mains power input circuit breaker tripped.

2) Poor contact of input communication line.

3) The input voltage of the mains power is too high, too low, or the frequency is abnormal.

4) UPS input air switch or switch is damaged or the fuse is blown.

5) UPS internal power detection circuit failure.

Handling method:

1) Check if the input is empty.

2) Check the input circuit.

3) If the mains power is abnormal, it can be left untreated or the generator can be started for power supply.

4) Replace damaged circuit breakers, switches, or fuses.

5) Check the UPS mains power detection circuit.

2. When the mains power is normal, the UPS output is normal. After the mains power is cut off, the load also loses power.

Possible reasons:

1) Due to the frequent low voltage of the mains power, the battery is in an undervoltage state.

2) The UPS charger is damaged and the battery cannot be charged.

3) The battery is aging and damaged.

4) Load overload, UPS bypass output.

5) The load has not received UPS output.

6) The battery pack of the long delay model is not connected or has poor contact.

7) The UPS inverter has not started (the UPS panel control switch is not turned on), and the load is powered by the mains bypass.

8) Inverter damaged, UPS bypass output.

Handling method:

1) A. Fully charge the battery when the mains voltage is normal.

B. Start the generator to charge the battery.

C. Add a voltage regulator to the UPS input terminal.

2) Check the charger.

3) Replace the battery.

4) Reduce the load.

5) Connect the load to the output of the UPS.

6) Check if the battery pack is connected correctly and securely.

7) Start the inverter to supply power to the load (turn on the panel control switch).

8) Check the inverter.

3. UPS cannot start

Possible reasons

1) The battery is left unused for a long time and has low voltage.　

2) The input AC and DC power lines are not connected properly.　

3) UPS internal startup circuit failure.　

4) UPS internal power circuit failure or power short circuit.