9–5
62-11640
9.4
REFRIGERATION / TEMPERATURE CONTROL
Indication/Trouble
Possible Causes
Action / Reference
9.4.1
Unit Will Not Cool
Compressor malfunction
Compressor contactor defective
Check
Compressor defective
Refrigeration system
A defrost cycle did not terminate. Check DTT
Abnormal pressure
Check system for noncondensibles
9.4.2
Unit Runs But Has Insufficient Cooling
Compressor
Compressor internal damage
Refrigeration system
Abnormal pressure
Expansion valve malfunction
No or restricted evaporator airflow
Suction Modulation Valve malfunction
Check system for noncondensibles
Check economizer
Check refrigerant charge
Check condenser coil
Engine
Check Air Filter
Check Engine Rack Position sensor calibration
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
Temperature sensor malfunction
Check system for noncondensibles
Compressor
Defective
9.4.4
Unit Will Not Terminate Cooling
Unit fails to stop cooling
Temperature sensor malfunction
Incorrect temperature scale, check whether microproces-
sor is set for °C or °F
Check
Incorrect DC Charging Current limit
Low Battery Voltage
Supply air temperature limit is too low
Содержание Vector 8500
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