Table 3-1. Direct Support Troubleshooting - continued
TEST OR INSPECTION
ROWPU ASSEMBLY - continued
PANEL LAMP FAILS TO LIGHT.
High voltages in this equipment can cause serious injury or death. When
applying power during a test, take proper measures to ensure personal safety.
Never work on electrical equipment unless there is another person nearby who is
familiar with the operation and hazards of the equipment and who is competent in
administering first aid
Perform lamp test by pushing light switch S11 momentarily to the "all up" position.
If all lamps, except panel lamp, illuminate, go to step 4.
Check if 208 VAC, three phase power is supplied by power source.
If 208 VAC, 3 phase power is not supplied by power source, refer to power source manual.
Disconnect power cable at power input jack, J1 (Model WPES1 and WPES-3) or J10 (Model WPES-2) and
check for 208 VAC between pins A-B, A-C, and B-C on cable.
If power is not measured in all three tests, replace power cable assembly. Refer to paragraph 3-23.
Remove guard, globe and fixture from panel light assembly (para 2-86) and check for 115 VAC at terminals
removed from fixture.
If 115 VAC is measured, replace light fixture Refer to paragraph 345.
Perform a point-to-point continuity test of light circuit from J1/J10(C) to DS10 and from DS10 to J1/J10(N).
If light switch, S11 is open (In ON position), replace S11. Refer to paragraph 345.
If cable assembly, W52 is open, repair It Refer to paragraph or 3-23.
If circuit breaker CB9 Is open (CB9 ON) replace it Refer to paragraph 3-49.
If continuity is not measured through wiring, tighten loose connections or replace defective wire