Electronic Control System
600 Series
(Prior to #1810000)
3-17
#3756270 - Revision B - January, 2006
Figure 3-37. Evaporator Temp, Compartment Air Temp. and Sealed System Pressure vs. Temp. set-point
During Normal Cycle of Operation
Using Temperatures To Troubleshoot Sealed System
To give the 600 Series a true “Sealed System”, the compressor process stub is soldered shut at the factory after the
sealed system is charged. Troubleshooting the sealed system is possible without a process valve because of the
600 Series Electronic Control System. Since the evaporator temperature, compartment air temperature and sealed
system pressure fluctuate harmoniously around the set-point during normal cycle of operation, troubleshooting the
sealed system is accomplished by observing the evaporator temperature reading in Diagnostic Mode.
Following is a chart illustrating how evaporator temperature and compartment air temperature fluctuate harmoniously
around the set-point during normal cycle of operation. Using temperatures to diagnose sealed system problems will
be detailed in the TROUBLESHOOTING GUIDE.
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