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

Chapter Five: Trouble Shooting Guide For MS2K

5.1. 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. 5.1
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
D10(1N4148) Of MS-D9910-x are defective.
1. Refer to fig5.1. Please check those items of
MS-D9910-x Boards are defective:
2. The transformer T4 is open.
3. . C94 is 11-13V?
4. D48, and Relay K1
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