TM 5-4610-223-12
Table 4-2. Troubleshooting - Continued
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
WATER PURIFICATION UNIT-Cont
24. AIR RELEASE VALVE WILL NOT OPERATE.
Step 1.
Check for clogged air lines.
Remove and clean the air line.
Step 2.
Check for cracked valve housing.
Replace the air release valve (para 4-106).
Step 3.
Check for defective diaphragm or diaphragm spring.
Replace the air release valve (para 4-106).
Step 4.
Check for inoperative, three-way release valve.
Replace the air release valve (para 4-106).
25. RAW WATER SIGHTGLASS FAILS TO SHOW WATER.
Step 1.
Check for restricted inlet port.
Remove sightglass and clean the port.
Step 2.
Check for air locked in sightglass.
Loosen the sightglass while unit is operating (refer to para 4-95).
PERSONNEL HEATER
26. HUNTER HEATER DELIVERS LITTLE OR NO HEAT.
Step 1.
Check for a defective thermostat.
Replace the thermostat (para 4-41).
Step 2.
Check for a defective circuit breaker.
Replace the circuit breaker (para 4-51).
Step 3.
Check for defective fuel pump.
Replace the fuel pump (para 4-38).
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