Lennox EL23XCV Series Manual page 57

PRESSURE
Y1 DEMAND
SWITCH (S4)
CONTACTOR
DE-ENERGIZED
OPEN
ANTI-SHORT
CYCLE TIMER
BEGINS
INCREMENT
5-STRIKE
COUNTER
LED ALERT
CODE / OR
MODERATE
ALERT 412
DISPLAYED
ANTI-SHORT
CYCLE TIMER
PRESSURE
SWITCH (S4)
SERVICE
2
REQUIRED
WAITING FOR
PRESSURE
OPEN
SWITCH TO
CLOSE
FIGURE 29. High Pressure Switch (S4) Sequence of Operation (All Versions)
HIGH
CLOSED
HIGH
PRESSURE
OPEN
SWITCH (S4)
1. The thermostat will terminate demand when the contactor is
de-energized. If demand is satisfied when alarm is not active, the
5-strike counter will reset.
2. Lockouts can be reset by cycling power off to the outdoor control's
(A175) R terminal.
WITHIN A SINGLE
1
ENDS
HIGH
CLOSED
CLOSED
TOP CAP
SWITCH (S173)
CLOSED
5-STRIKE
COUNTER
REACHES 5
Y1 DEMAND
HIGH
PRESSURE
SWITCH (S4)
LOCKOUT
LED ALERT
CODE / OR
CRITICAL
ALERT 413
CLEARED
LED ALERT
CODE / OR
MODERATE
ALERT 412
DISPLAYED
Page 57
CONTACTOR
CLOSED
ENERGIZED
SERVICE
2
REQUIRED
NORMAL
OPERATION