SRC Service Manual
Revision 02
Aug 2007
8. Cycling Operation
8.1 SRC-125 to 200
The compressor is turned OFF when the coolant temperature in the tank reaches 1
o
C, and ON when it
reaches 2
o
C. The temperature is read by a thermostat, and the settings are not adjustable.
0
1
2
3
Temperature (deg C)
Coolant Temperature
Compressor
ON
ON
OFF
OFF
0
1
2
3
Temperature (deg C)
Coolant Temperature
Compressor
ON
ON
OFF
OFF
8.2 SRC-250 to 1000
Cycling operation on the SRC-250 to 1000 is controlled by the microprocessor in line with the following
Factory Parameters. (Note: Factory Parameters are locked and should NOT be adjusted.)
Parameter Units Min Max Default
C1 Coolant Temperature Setting
o
C -9.9 70.0 1.0
C2 Coolant Temperature Differential
o
C 0.0 30.0 1.0
C3 Compressor OFF Time Delay sec 0 600 1
C4 Immediate Compressor OFF Temp
o
C -9.9 15.0 0.5
C5 Software Version - d.t.1 d.t.1 d.t.1
C6 Compressor ON Time Delay sec 0 900 60
The compressor is turned ON when the Coolant Temperature (B5) reaches 2
o
C.
(Coolant Temperature Setting: C1 + Coolant Temperature Differential: C2)
0
1
2
3
Temperature (deg C)
B5: Coolant Temperature
Compressor
ON
ON
OFF
OFF
0
1
2
3
Temperature (deg C)
B5: Coolant Temperature
Compressor
ON
ON
OFF
OFF
C1: Coolant Temperature Setting
C2: Coolant Temperature Differential
C3
C3
C1: Coolant Temperature Setting
C2: Coolant Temperature Differential
C3
C3
The compressor is turned OFF 1 second (Compressor OFF Time Delay: C3) after the
Coolant Temperature (B5) reaches1
o
C (Coolant Temperature Setting: C1).
(Continued on following page…)
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