ARMY TM 9-6115-604-12
NAVY NAVFAC P 8 633-12
Repair . Repair consists of replacing lamps and panel lights. Refer to steps b and d.
Install . See Figure 4-76.
(1) Install panel light (3) and secure with lockwasher and locking nut from rear panel.
(2) Install lamp (4) and covering hood.
(3) Connect wires and discard tags.
(4) Set MAINTENANCE LOCKOUT switch S100 to OPERATE.
4-131. PANEL LIGHTS SWITCH S1 (13, FIGURE 2-1). PANEL LIGHTS switch S1 Is used to turn panel lights on and
Dangerous voltage levels may be present at components located within cabinet C.
Observe all applicable safety precautions as outlined In Chapter 1, Section III, of
(1) Disconnect and tag lead from terminal 3.
(2) Using a multimeter set to RX1 scale with PANEL LIGHTS switch S1 In ON position, test for continuity across
terminals 2 and 3 Meter should Indicate zero ohm.
(3) Place PANEL LIGHTS switch S1 in OFF position and test for isolation with the multimeter probes across
terminals 2 and 3. Meter should read infinity.
(4) Connect lead to terminal 3 and discard tag.
(5) Replace PANEL LIGHTS switch S1 if it fails any of the continuity tests in steps (2) and (3), above.
b.` Remove. See Figure 4-75.
(1) Set MAINTENANCE LOCKOUT switch S100 to MAINTENANCE.
(2) Tag and disconnect wiring from PANEL LIGHTS switch S1 (10).
(3) Remove locking nut and lockwasher to release PANEL LIGHTS switch Si (10) for rear panel removal.
Install. See Figure 4-75.
(1) Install replacement PANEL LIGHTS switch S1 (10) from rear of cabinet C door and oriented such that the
ON position is upward Check with multimeter set to RX1 scale to meet test condition in step a, above.
(2) Connect wires and discard tags.
(3) Set MAINTENANCE LOCKOUT switch S100 to OPERATE.
4-132. MAINTENANCE LOCKOUT SWITCH S100 (1, Figure 2-1). MAINTENANCE LOCKOUT switch S100 is used to
disconnect AC and DC voltage from generator set circuits. Unless specified otherwise, the switch is to be set to
MAINTENANCE whenever the generator set is not being operated or is being maintained.
(1) Tag and disconnect wiring from rear of MAINTENANCE LOCKOUT switch S100 (1).
(2) Remove four mounting screws at front of cabinet C door and remove MAINTENANCE LOCKOUT switch
S100 from the rear.
Test. Test for continuity using a multimeter set to RX1 scale. The MAINTENANCE LOCKOUT switch S100 is
rated 225 amperes, 240 V ac, nonautomatic trip.