DEFROST CIRCUIT BOARDS
Defrost Control Circuit Switch (“ON/OFF”)
shuts off all power to the defrost branch cir-
cuit.
Branch On – Green LED – indicates that
there is 120VAC to the system branch circuit.
If the switch is off, the light will turn off.
Defrost – Yellow LED – indicates the system
is in defrost. This light will turn off if the
defrost has been terminated due to time or
temperature, and if the branch is in drip cycle.
EPR Solenoid – Green LED – indicates the
suction stop solenoid is energized, which
means the valve is open.
Liquid Branch Solenoid – Green LED –
indicates the liquid branch solenoid is ener-
gized. It will turn off when the thermostat no
longer calls for refrigeration.
HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 • Printed in USA
ELECTRICAL Revised August 1, 1996
4 - 22
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