1. Open front cover on ATCCS UPS Storage Box and
remove cable W41 plug P1 (1) from UPS jack AC OUT.
2. Remove cable W41 plug P2 (2) from UPS Power
Extension Box A16 jack J4 (3).
3. Measure resistance between pins of plugs P1 (1) and
P2 (2) of cable W41 as follows:
P1 pin H to P2 socket A
P1 pin N to P2 socket B
P1 pin G to P2 socket C
4. Does multimeter read 0 ohms for each measurement?
1. Replace cable W41
2. Verify no faults found.