TM 9-4120-395-14&P
Table 5-1. Direct Support Troubleshooting - Continued.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
4.
Disconnect input power before performing internal electrical troubleshooting.
Voltages used can be deadly.
Step 1. Check airflow out of conditioned air outlet. If airflow volume is low:
Step 2. Check adjustment of fresh air damper. See para 4-21.
Adjust properly.
Replace if defective.
Step 4. Test reversing valve. See para 5-19.
Replace defective components.
Step 6. Check refrigerant charge in air conditioner. See para 5-11.
5.
REDUCED COOLING CAPACITY.
Step 1. Check airflow out of conditioned air outlet. If airflow is low:
a.
b.
c.
Step 2. Check setting of fresh air damper. See para 4-21.
Adjust fresh air damper.
Step 3. Check refrigerant charge of the air conditioner. See para 5-11.
If pressure is low, charge the system. See para 5-10.
5-3