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