Ablerex 3 MS series User Manual page 33

6.2.1. Troubleshooting
Check Items
Output Short Circuit
Overload(>120%)
Battery voltage is abnormal
INVERTER Voltage ERROR
The Fan on the rear panel is out of order
Environmental Temperature is out of windows(
Over 40 degree C)
BUS Voltage abnormal
The feedback signal to CPU is abnormal.
6.2.2.Fault Status Analysis
When the Fault LED lights up, you may know which part of the UPS is out of order by
Pushing the Test Switch in front.
Utility Inverter
0 0
0 0
0 0
0 1
0 1
0 1
p.s. A code composed by Utility, Inverter, Battery Low and Overload LEDs may indicate the possible
fault conditions by pushing the Test Switch button in front.
Trouble-shooting
Check if the output end of the UPS is in short
circuit.
Reduce the output load to 3000VA/2100W
1.
2.
Refer to fig.6-4, Check U8, U9, Q29, Q30, Q31,
Q32¡C
1.Check to see if the connection to the fan is
2.Connect 12Vdc t o the Fan(red line to positive)
3.Otherwise, please check the related circuit as
Improve the ventilation and reduce the temperature
of the environment.
The PFC control IC U2 or the Booster control IC
U7 may be abnormal.
1.Check if the connection between the control
2.Check if pin1 of U1(HA17393) of the driver
Battery Low Overload
0 1
1 0
1 1
0 0
0 1
1 0
If the battery voltage is under 78V, replace
the batteries¡C
Remove the battery, and check the charge
voltage. if the voltage is over 115V, the
charger circuit is out of order. Refer to fig6.1,
please check U12¡B U13¡B VR1 and other device
nearby.
Properly done.
to check if the fan is normal.
fig 6-2.
Board and the driver board is properly done.
board is sending out a square wave of Utility
frequency.
Symptom
Short Circuit
Inverter Over-current
Battery Voltage Abnormal
Inverter Voltage Abnormal
Heatsink Overheat
DC Bus Fault
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