|
| |
ARMY TM 9-4120-381-14
NAVY EE-000-CA-MMA-010/7053-AC
AIR FORCE TO 35E9-136-31
Table 5-1. Direct Support Troubleshooting - Continued
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
6. LOW DISCHARGE PRESSURE.
Step 1. Suction service valve partially closed.
Backseat (counterclockwise) suction service valve (para 5-34).
Step 2. Leaky compressor suction valves.
Remove cylinder head, examine valves and valve seats (para 5-47), replace if necessary.
Step 3. Worn piston rings.
a.
Check connecting rods pistons, and rings (para 5-49), replace if necessary.
b.
Check rods, pistons, and cylinder tolerances (para 5-49).
c.
If any cylinder bore is out of tolerance (para 5-49), replace compressor (para 5-46).
7. FLOODING.
Step 1. Improperly set primary expansion valve.
Adjust primary expansion valve (para 5-38).
Step 2. Improperly set liquid quench expansion valve.
Adjust liquid quench expansion valve (para 5-36).
Step 3. Improperly set hot gas bypass valve
Adjust hot gas bypass valve (para 5-37).
Step 4. Evaporator circulator fan failure.
a.
Check fan belt tension (para 4-69).
b.
Check evaporator motor (para 4-70).
c.
Check evaporator motor fan pulleys (para 4-72 and 4-73).
d.
Check evaporator circulator fan (para 4-71).
8. LOW SUCTION PRESSURE.
Step 1. Insufficient refrigerant in system.
Add refrigerant (para 5-17).
Step 2. Evaporator circulator fan failure.
a.
Check fan belt tension (para 4-69).
b.
Check evaporator motor (para 4-70).
c.
Check evaporator motor and fan pulleys (para 4-72 and 4-73).
d.
Check evaporator circulator fan (para 4-71).
5-4
|
