Table 3-2. Electrical System Troubleshooting

TM 5-6640-213-14

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

1. NO POWER TO LABORATORY ELECTRICAL SYSTEM (PILOT LAMP DOES

NOT LIGHT WHEN MAIN POWER SWITCH (ON PUSHBUTTON) IS DE-

PRESSED).

Check for generator malfunction, due to power cable not properly

Step 1.

connected.

a. Check generator and correct.

b. Make sure that power cable is connected properly.

Step 2.

Check for tripped CB1 circuit breaker.

Locate and correct cause of overcurrent. Close CB1 circuit

breaker.

Step 3,

Check for missing or blown F1 fuse.

Locate and correct cause of overcurrent, if fuse is blown.

Replace fuse F1.

2. NO POWER TO LABORATORY ELECTRICAL SYSTEM (PILOT LAMP

DOES NOT LIGHT WHEN MAIN POWER SWITCH IS DEPRESSED).

Step 1.

Check for defective relay K1, or timer.

Repair or replace relay K1 or timer.

NOTE

In an emergency, a defective timer may

be temporarily bypassed by moving the

pointer counterclockwise to the zero

position. Repair or replace defective

timer as soon as possible.

Step 2.

Check for defective switch S1 or S2.

Repair or replace S1 or S2, or both.