Ablerex 3 MS series - Chapter 6: Trouble Shooting Guide For MS3 K; 6.1. Utility Normal, UPS on Battery

31
Chapter Six: Trouble Shooting Guide For MS3K
6.1. Utility is Normal, but UPS on Battery Mode
FIG. 6.1
Check Items Trouble-shooting
Utility Voltage is out of windows(<80Vac or
>140Vac for 120Vac system or <160Vac or
>280Vac for 230Vac system)
Your Utility quality is too bad. You are
recommended to install an AVR in front of the
UPS.
Input AC fuse is broken. Replace a new fuse with same rating one.
Input Power Cord is loose in connection. Please re-connect the loose Input Power Cord
properly back to its position.
Input detecting circuit is out of order. Please check whether the U5(LM324) or
D13(1N4148) Of MSCD0xx are defective.
Over-voltage Trip-off circuit is out of order. 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