Lennox EL16XP1 Series Unit Information page 21

TEST PINS (P1)
LOW AMBIENT
THERMOSTAT PINS
(P3)
DEFROST TERMINATION
PIN SETTINGS (P1)
SENSOR CONNECTION
(COIL AND AMBIENT
SENSORS)
(P4)
DIAGNOSTIC LEDS
(DS1 AND DS2)
DELAY PINS
(P5)
24V TERMINAL STRIP
REVERSING VALVE
CONNECTIONS
(O OUT)
(P2)
Demand Defrost
PRESSURE
Control (A108)
SWITCH CIRCUIT
CONNECTIONS
Note - Component locations vary by board manufacturer.
FIGURE 12. Demand Defrost Control (A108)
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