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 TM 55-1905-219-14-8
4-5. GENERAL (Continued).
Table 4-13. Milk Dispenser Troubleshooting (Continued).
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
7. Relay burns out.
Step 1.
Incorrect voltage.
Power source must be 110 vac.
Step 2.
Compressor short-cycling.
See Compressor Troubles (see malfunctions 1 thru 6).
Step 3.
Incorrect relay.
Replace.
8. Head pressure too high.
Step 1.
Air passage at air duct panel restricted.
Remove restriction.
Step 2.
Restriction, air or noncondensable gases in refrigeration system.
Evacuate and recharge.
9. Head pressure too low.
Step 1.
Dispenser location too cold.
Move unit to warmer location.
Step 2.
Leak in refrigeration system.
Detect and seal.
Step 3.
Insufficient refrigerant charge.
Add refrigerant.
4-55
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