62-11637 9–4
9.3 REFRIGERATION / TEMPERATURE CONTROL
Excessive charging rate (evi-
denced by need for frequent filling
or constant high charging amper-
age)
Regulator faulty 8.10.5
Alternator noisy
Alternator belt loose/broken/misaligned 8.5.15
Loose pulley 8.10.5
Worn bearings 8.10.5
Indication/Trouble Possible Causes Action / Reference
9.3.1 Unit Will Not Cool
Compressor malfunction
Compressor drive defective 8.6.1
Compressor defective 8.8.1
Refrigeration system
A defrost cycle did not terminate. Check DTT 8.10.7
Abnormal pressure 9.3.9
Solenoid valve malfunction 8.9.5 / 8.9.6
Clutch failure 8.6.4
9.3.2 Unit Runs But Has Insufficient Cooling
Compressor
Compressor internal damage 8.8.1
Unloader malfunction 8.8.6
Refrigeration system
Abnormal pressure 9.3.9
Unloader malfunction 8.8.6
Expansion valve malfunction 9.3.13
No or restricted evaporator airflow 9.3.12
Suction Modulation Valve malfunction 8.9.8
Check system for noncondensibles 8.7.2
Clutch failure 8.6.4
9.3.3 System Will Not Pump Down
Valve malfunction
SV2 or SV4 not closing 8.9.6
Check valve not closing 8.9.10
Liquid line service valve defective Replace
Compressor Compressor internal damage 8.8.1
9.3.4 Unit Operates Long Or Continuously In Cooling
Refrigerated Compartment
Hot Load Allow time to pull
down
Defective or insufficient refrigerated compartment insula-
tion or air leak
Correct
Refrigeration system
Abnormal pressure 9.3.9
Temperature sensor malfunction 8.10.7
Check system for noncondensibles 8.7.2
Compressor Compressor internal damage 8.8.1
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