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24V TERMINAL STRIP
CONNECTIONS
DIAGNOSTIC LEDS
HIGH PRESSURE SWITCH
TEST PINS
FIELD SELECT
TIMING PINS
REVERSING VALVE
DEFROST THERMOSTAT
LOW PRESSURE SWITCH
COMPRESSOR DELAY PINS
S4
S87
SERVICE LIGHT CONNECTIONS
Figure 1. Defrost Control (100269-05)
Test Mode
The TEST mode is activated by removing the jumper on
the defrost termination pins (30, 60 or 90) and placing the
jumper on the TEST pins after 24VAC is applied to the
control. The low pressure input is ignored in TEST mode.
IMPORTANT
The TEST pins are ignored and the TEST function is
locked out:
S If the jumper is applied on the TEST pin before
24VAC is applied to the control.
S If there is a jumper on the 30 or 60 minute defrost ter
mination pins.
Bypass-Anti-Short Cycle Delay
The Y1 input must be active ON, the high pressure switch
must be closed or a jumper must be installed on the high
pressure terminals of the control.
Initiate a Forced Defrost
The Y1 input must be active ON, the high pressure switch
must be closed or a jumper must be installed on the high
pressure terminals of the control, the defrost thermostat
must be closed or a jumper must be placed across the DF
terminals on the control and the O terminals must not have
24VAC (no power to reversing valve) before control will
enter into a force defrost.
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