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506586−01 10/10
Y1 DEMAND
COMPRESSOR
CONTACTOR
ENERGIZED
INITIAL TRIP
SWITCH IS
IGNORED FOR
90 SECONDS
W OUTPUT
ACTIVE)
COMPRESSOR
CONTACTOR
DE−ENERGIZED
COMPRESSOR
ANTI−SHORT
CYCLE TIMER
BEGINS
INCREMENT
5−STRIKE
COUNTER
1
LED ALERT
CODE / OR
MODERATE
ALERT 418
DISPLAYED
ANTI−SHORT
CYCLE TIMER
ENDS
W OUTPUT
HARDWARE
FAULT
LOCKOUT
WAITING FOR
W OUTPUT TO
DEACTIVATE
5−STRIKE
COUNTER
REACHES 5
WITHIN A SINGLE
Y1 DEMAND
LED ALERT
CODE / OR
MODERATE
ALERT 418
DISPLAYED
LED ALERT
CODE / OR
CRITICAL
ALERT 419
DISPLAYED
SERVICE
REQUIRED
2
YES
W OUTPUT
ACTIVE)
NO
COMPRESSOR
ANTI−SHORT
CYCLE TIMER
BEGINS
YES
LED ALERT
CODE / OR
MODERATE
ALERT 418
CLEARED
ANTI−SHORT
CYCLE TIMER
ENDS
W OUTPUT
ACTIVE)
NORMAL
OPERATION
LED ALERT
CODE / OR
MODERATE
ALERT 418
CLEARED
NO
YES
NO
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 Touch
®
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 heat pump control’s (A175) R terminal, or placing
a jumper on the field test pins (E33) between 1 to 2 seconds.
Figure 30. W Input Fault or Miswire