36
3.Check if the U7 SG3525 is out of order.
4.Check if the Booster Transformer T2
、
T3 is open.
5.After replace the defective devices. To make sure the other parts of the
UPS is OK. Disconnect the logic board from driver board.
Cut off the Utility. Provide 96Vdc to CN5(+) and CN6(-) by a DC
Power Supply, connect CN4 to the main switch. Push on the main
switch and to see if DC POWER of UPS, i.e. VDD(18-16V),
VCC(12V) and +/-5V is normal.
6.5 No LEDs and No Output
FIG. 6.5
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...
