Utility Is Normal, Butups On Battery Mode - Ablerex 3 MS series User Manual

Chapter Six: Trouble Shooting Guide For MS3K
6.1. Utility is Normal, but UPS on Battery Mode
Check Items
Utility Voltage is out of windows(<80Vac or
>140Vac for 120Vac system or <160Vac or
>280Vac for 230Vac system)
Input AC fuse is broken.
Input Power Cord is loose in connection.
Input detecting circuit is out of order.
Over-voltage Trip-off circuit is out of order.
FIG. 6.1
Trouble-shooting
Your Utility quality is too bad. You are
recommended to install an AVR in front of the
UPS.
Replace a new fuse with same rating one.
Please re-connect the loose Input Power Cord
properly back to its position.
Please check whether the U5(LM324) or
D13(1N4148) Of MSCD0xx are defective.
1.Refer to fig 6.1. Please check those items of
MSCD0xx Board are defective:
2.The transformer T4 is open.
3.C104 is 11-15V?
4.Check D53, and Relay K1
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