Lennox XC17 Series Unit Information page 58

PRESSURE
Y1 DEMAND
SWITCH (S4)
COMPRESSOR
CONTACTOR
DE−ENERGIZED
OPEN
COMPRESSOR
ANTI−SHORT
CYCLE TIMER
BEGINS
INCREMENT
5−STRIKE
COUNTER
LED ALERT
CODE / OR
MODERATE
ALERT 412
DISPLAYED
ANTI−SHORT
CYCLE TIMER
COMPRESSOR
CONTACTOR
ENERGIZED
PRESSURE
SWITCH (S4)
SERVICE
2
REQUIRED
WAITING FOR
PRESSURE
OPEN
SWITCH TO
CLOSE
XC17
HIGH
CLOSED
HIGH
PRESSURE
OPEN
SWITCH (S4)
1
If 5−strike counter has four or less strikes when Y1 demand
is terminated or satisfied, the strike counter will reset to zero.
In a icomfort Toucht thermostat enabled setup, the
thermostat will terminate demand when the compressor
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 either cycling power off to the air
conditioner control's (A175) R terminal, or placing a jumper
on the field test pins (E33) between 1 to 2 seconds.
REACHES 5
WITHIN A SINGLE
1
Y1 DEMAND
SWITCH (S4)
ENDS
HIGH
CLOSED
CLOSED
Figure 34. High Pressure Switch (S4) Sequence of Operation
COMPRESSOR
CONTACTOR
ENERGIZED
CLOSED
5−STRIKE
COUNTER
HIGH
PRESSURE
LOCKOUT
LED ALERT
CODE / OR
SERVICE
CRITICAL
REQUIRED
ALERT 413
CLEARED
LED ALERT
CODE / OR
MODERATE
ALERT 412
DISPLAYED
Page 58
2
NORMAL
OPERATION