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
T
e
m
p
er
at
u
re (
d
eg
C
)
Coolant Temperature
Compressor
ON
ON
OFF
OFF
0
1
2
3
T
e
m
p
er
at
u
re (
d
eg
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
Te
m
p
e
ra
tur
e
(
d
e
g
C)
B5: Coolant Temperature
Compressor
ON
ON
OFF
OFF
0
1
2
3
Te
m
p
e
ra
tur
e
(
d
e
g
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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