Lennox XP17-024-230-01 Installation And Service Procedure page 56

Y1 DEMAND
COMPRESSOR
CONTACTOR
ENERGIZED
YES
COMPRESSOR
CONTACTOR
DE-ENERGIZED
W OUTPUT
ACTIVE)
NO
COMPRESSOR
ANTI-SHORT
CYCLE TIMER
BEGINS
INCREMENT
5-STRIKE
1
COUNTER
LED ALERT
CODE / OR
MODERATE
ALERT 418
DISPLAYED
ANTI-SHORT
CYCLE TIMER
ENDS
LED ALERT
CODE / OR
MODERATE
ALERT 418
CLEARED
XP17
W OUTPUT
ACTIVE)
COMPRESSOR
ANTI-SHORT
YES
CYCLE TIMER
BEGINS
5-STRIKE
COUNTER
REACHES 5
WITHIN A SINGLE
Y1 DEMAND
W OUTPUT
HARDWARE
FAULT
LOCKOUT
LED ALERT
CODE / OR
CRITICAL
ALERT 419
DISPLAYED
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 iComfortt-enabled thermostat 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 heat pump control's (A175)
R terminal, or placing a jumper on the field test pins (E33) between 1 to 2 seconds.
Figure 33. W Input Fault or Miswire Sequence of Operation
INITIAL TRIP
SWITCH IS
IGNORED FOR
90 SECONDS
NO
LED ALERT
CODE / OR
MODERATE
ALERT 418
DISPLAYED
ANTI-SHORT
CYCLE TIMER
ENDS
W OUTPUT
ACTIVE)
YES
WAITING FOR
W OUTPUT TO
DEACTIVATE
SERVICE
2
REQUIRED
Page 56
NORMAL
OPERATION
LED ALERT
CODE / OR
MODERATE
NO
ALERT 418
CLEARED