Section IV. TROUBLESHOOTING PROCEDURES
4-8. TROUBLESHOOTING TABLE. Proper troubleshooting procedures require that preliminary checks
be accomplishd, all connections be tight and secure, and safeguards be utilized to prevent excess
ammonia vapor from entering the working area.
4-9. SCOPE. This manual cannot list all the possible malfunctions or every possible test, inspection,
or corrective action. If a malfunction is not listed or is not corrected by the listed corrective actions,
notify your supervisor.
Table 4-3. Direct Support Troubleshooting
TEST OR INSPECTION
DRIVE RUNNING AT UNCONTROLLED SPEED.
Rotate potentiometer left and right
Replace potentiometer (see paragraph 4-11).
START CIRCUIT NOT ENERGIZED.
No voltage on feed switch leads.
(a) Replace printer switch (see paragraph 4-15).
(b) Adjust time delay (see paragraph 4-19).
No voltage on main switch leads.
Replace main switch leads (see paragraph 4-14).
Test wiring harness.
Refer to next higher level of maintenance for repair.
Replace defective fuseholder (sea paragraph 4-10).
Step 1. Observe ammonia bubbles in Supply.
Refer to next higher level of maintenance for pump replacement.
Step 2. Observe plastic lines show condensation.
Remove condensation (see paragraph 4-13).