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

Chapter Four: Trouble Shooting Guide For MS1K
4.1.

Utility is Normal, but UPS on Battery Mode

Check Items
Utility Voltage is out of windows(<80Vac or
>140Vac for 120Vac system;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. 4.1
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
D1(1N4148) Of MS-D9917-x are defective.
1.Refer to fig4.1. Please check those items of
MS-D9917-x Boards are defective:
2. The transformer T3 is open.
3. C69 is 11-13V?
4. D34, and Relay K1
15
the U1(LM324) or