9−4
62-11389
9.3 GENERATOR
Indication/Trouble
Possible Causes Action/Refer-
ence Section
No voltage with engine running
Damaged harness Check
GENCON damaged Check
Open or short in stator windings Check
Low voltage
Low engine speed Correct
Excessive load Check
High resistance connections - connections
warm or hot
Clean and
Tighten
Fluctuating voltage
Fluctuating speed 9.5
Irregular speed of engine 9.5
Loose terminal or load connections Tighten
High voltage Excessive engine speed 9.5
Overheating
Generator overloaded Check
Clogged ventilation openings Clean
Insufficient circulation Check Fan
Unbalanced load Balance
Mechanical Noise Loose laminations 8.9.9
9.4 REFRIGERATION / TEMPERATURE CONTROL
Indication/Trouble Possible Causes Action/Refer-
ence Section
9.4.1 Unit Will Not Cool
Compressor malfunction
Compressor contactor or relay defective Check
Compressor defective 8.7.1
Refrigeration system
A defrost cycle did not terminate. Check DTT 8.9.10
Abnormal pressure 9.4.8
Check system for noncondensibles 8.6.2
9.4.2 Unit Runs But Has Insufficient Cooling
Compressor
Compressor internal damage 8.7.1
Unloader malfunction 8.7.6
Refrigeration system
Abnormal pressure 9.4.8
Unloader malfunction 8.7.6
Expansion valve malfunction 9.4.11
No or restricted evaporator airflow 9.4.10
Suction Modulation Valve malfunction 8.8.5
Check system for noncondensibles 8.6.2
9.4.3 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 9.4.8
Temperature sensor malfunction 8.9.10
Check system for noncondensibles 8.6.2
Compressor Defective 8.7.1
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