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Chapter Five: Trouble Shooting Guide For MS2K
5.1. Utility is Normal, but UPS on Battery Mode
FIG. 5.1
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
D10(1N4148) Of MS-D9910-x are defective.
Over-voltage Trip-off circuit is out of order.
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
Summary of Contents for 3 MS series
Page 7: ...7 1 2 3 4 5 6 7 8 9 Pin 6 RS232 Rx Pin 9 RS232 Tx Pin 7 Ground...
Page 24: ...24 5 2 Fault LED Lights up and No Output FIG 5 2...
Page 32: ...32 6 2 Fault LED Lights up and No Output FIG 6 2...
Page 39: ...39 Appendix a 1 Wiring Diagram a 1 1 For MS 1K...
Page 41: ...41 a 1 3 For MS3K...
Page 42: ...42 a 2 Placements a 2 1 For MS1K 220V...
Page 43: ...43 a 2 2 For MS2K 220V a 2 3 For MS3K...
Page 44: ...44 a 2 3 For MS3K 220V...
Page 45: ...45 a 2 4 For MS1K 120V...
Page 46: ...46 a 2 5 For MS2K 120V...