TM 9-4120-408-14
Table 5-1. Direct Support Troubleshooting Table.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1. High Pressure Warning Light on Control Module is Lit.
2. Low Pressure Warning Light on Control Nodule Is Lit.
Step 1. Check refrigerant charge.
Step 2. Inspect liquid line receiver for damaged or missing fusible plug (paragraph 5-13).
Step 3. Inspect condenser assembly for leaks and damaged liquid/moisture indicator (paragraphs 5-10, 5-
Step 6. Inspect evaporator assembly for leaks or damage (paragraphs 5-24, 5-25, 5-26, and 5-27).
Replace damaged or leaking components (paragraphs 5-24, 5-25, 5-26, and 5-27).
3. Condenser Vane Axial Fans Do Not Operate.
Replace defective condenser vane axial fan cut out switch (S3 or S4) (paragraph 5-10).
4. Insufficient Cooling.
Step 1. Check refrigerant charge.
Step 2. Check for blocked air flow in condenser assembly.
Remove obstructions.
5-3