Table 4-3. MODEL F10000RG-2 TROUBLESHOOTING

TM 5-4110-234-14

TO 40R7-5-7-1

Table 4-3. MODEL F10000RG-2 TROUBLESHOOTING (cont.)

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

Step 9.

Check for defective starter relay.

Replace relay (para 4-33).

Step 10.

Check for choke out of adjustment.

Adjust per paragraph 4-3.

Step 11.

Check for defective magneto ignition.

Repair or replace (para 4-69).

Step 12.

Check for defective starter solenoid.

Replace (para 4-70).

Step 13.

Check for defective starting motor.

Replace (para 4-70).

Step 14.

Check for defective ON-OFF switch.

Replace (para 4-27).

Step 15.

Check for defective high pressure cutout switch.

Replace (para 4-35).

Step 16.

Check for engine defects.

Repair or replace defective parts or notify higher level maintenance, as necessary (para

4-59).

2. INSUFFICIENT COOLING

Step 1.

Check for closed receiver valves.

Open receiver valves.

Step 2.

Check evaporator air intake and outlet screens to make sure they are not obstructed.

Remove obstruction.

Step 3.

Check evaporator fan for defects. See paragraph 4-41.

Replace defective fan.

Step 4.

Check evaporator and condenser coil for dirt or any obstruction that would block air flow.

Clean coils.

Step 5.

Check thermostat for defects.

Replace defective thermostat (para 4-36).

Step 6.

With unit operating in cooling cycle check the refrigerant sight glass.

If center indicator is pink or if numerous bubbles appear contact direct support

maintenance.

Step 7.

Check whether compressor is operating.

Report problems to direct support maintenance.

Step 8.

Check for clogged filter-drier. Feel filter-drier for temperature difference. Discharge end will either

feel cooler than input end if clogged, or may be sweaty or frosty.

Report to direct support maintenance.

3. EXCESSIVELY NOISY OPERATION

Step 1.

Check for low oil level in compressor. Oil not visible in compressor crankcase sight glass.

Report to direct support maintenance.

Step 2.

Check for defective compressor.

Report to direct support maintenance.

Step 3.

Check evaporator fan for looseness, vibration or interference. See para 4-41.

Tighten setscrews. Look for bent or broken blades that would cause an out-of-balance

condition. Replace defective fan as necessary.

Step 4.

Check condenser fan for looseness, vibration or interference. See para 4-42.

Tighten setscrews. Look for bent or broken blades that would cause an out-of-balance

condition. Replace defective fan as necessary.

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