10
SC-CF & SC-MP Service Manual
Jumper Positions
Certain parameters can be modified by changing the position of jumpers
on the board.
Jumper 1: Current Limiting Option
Jumper 1 is used to limit amount of current drawn when the 2 pumps are on.
Position 1 (HC):
System turns heater off when the two pumps are on
at high speed.
Position 2 (LC)*:
System turns heater on when one pump is on at high
speed. The "Heater" icon flashes on display indicating
that more heat is requested, but heater is not allowed
to start.
Jumper 2: Temperature Unit
Jumper 2 is used to select the temperature unit.
Position 1:
Temperature will be displayed in Fahrenheit degrees.
Position 2:
Temperature will be displayed in Celsius degrees.
Jumper 3: Pumps
Position 1:
Single-pump.
Position 2:
Dual-pump (or blower).
To access jumpers, first remove SC-CF or SC-MP power box cover.
In some cases, jumper functions may differ from the following. Please check wiring
diagram on power pack box cover to verify specific functions for your pack.
2• To change a setting, simply pull cover
off and replace in desired position.
1• Jumpers are located in the lower
right section of the board.
Position 2
Position 1
Jumpers
*Mandatory for 120 VAC systems
Summary of Contents for SC-CF
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