Ablerex 3 MS series - 4.2. Fault LED Lights and No Output

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4.2. Fault LED Lights up and No Output
4.2.1. Troubleshooting
FIG. 4.2
Check Items Trouble-shooting
Output Short Circuit Check if the output end of the UPS is in short
circuit.
Overload(>120%) Reduce the output load.
MS1K/MS1KR: 1000VA/700W
Battery voltage is abnormal
1. If the battery voltage is under 28.8V, replace the batteries。
2. Remove the battery, check the charge voltage. If the voltage
is over 43V, the charger circuit is out of order. Refer to fig4.1,
please check U14、U10、VR1 and other device nearby.
INVERTER Voltage ERROR
Refer to fig.4-4, Check U7、U8、Q13、Q14 。
The Fan on the rear panel is out of
order
1. Check to see if the connection to the fan is
Properly done.