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 TM 5-4110-234-14
TO 40R7-5-7-1
Table 4-3. MODEL F10000RG-2 TROUBLESHOOTING (cont.)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
6. UNIT RUNS CONTINUOUSLY
Step 1.
Check for loose compressor drive belt.
Adjust or replace (para 4-45).
Step 2.
Check whether fans are operating.
Adjust drive belt or replace (para 4-44).
Step 3.
Check for defective relay.
Replace relay (para 4-33).
Step 4.
Check whether compressor service valves are stuck open or leaking.
Report to direct support maintenance.
Step 5.
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 6.
Check for defective expansion valve.
Report to direct support maintenance.
Step 7.
Check if thermostat set too low.
Reset thermostat (fig. 4-3).
Step 8.
Check for excessive leakage of cooled air from enclosure.
Keep enclosure closed. Check gaskets.
7. UNIT WILL NOT DEFROST
Step 1.
Check if hot gas line shut off valve is closed.
Open valve.
Step 2.
Check for defective defrost timer.
Replace timer (para 4-32).
Step 3.
Check for broken or leaking refrigerant line.
Notify direct support maintenance.
Step 4.
Check for defective defrost relay.
Repair or replace (para 4-33).
Step 5.
Possible clogged refrigerant strainer.
Report to direct support maintenance.
4-27
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