Vanguard UPS S2 User Manual download pdf (Page 12)

Operating Procedures UPS-S2

APPENDIX A

UPS-S2 Troubleshooting Guide

Item Symptom Possible Problem Solution

1 No output. 1. Power Switch is not on.

2. Voltage selection

AC/DC in is the wrong

position

3. Variac is not set.

4. Output fuse is blown

1. Check Power switch.

2. Check voltage selection

switch.

3. Turn Variac to increase

voltage.

4. Check output fuse.

2 Operating voltage is

120Vac. Cannot get

output voltage above

120Vac

Output voltage range

switch is probably in

“LOW RANGE”

Set range switch to “HIGH

RANGE”

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Vanguard UPS S2 User Manual Page 12