Y1 DEMAND
OPEN
DISCHARGE
SENSOR (RT28)
IS AT OR
BELOW 225ºF
NO
Figure 34. High Discharge Temperature (RT28) Sensor Sequence of Operation
XC21
DISCHARGE
CLOSED
SENSOR
(RT28)*
PRESSURE
OPEN
SWITCH (S4)
COMPRESSOR
1
CONTACTOR
If 5−strike counter has four or less strikes when Y1 demand
DE−ENERGIZED
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
COMPRESSOR
alarm is not active, the 5−strike counter will reset.
ANTI−SHORT
CYCLE TIMER
2
Lockouts can be reset by either cycling power off to the air
BEGINS
conditioner control's (A175) R terminal, or placing a jumper
on the field test pins (E33) between 1 to 2 seconds.
INCREMENT
5−STRIKE
1
COUNTER
LED ALERT
CODE / OR
MODERATE
ALERT 414
DISPLAYED
ANTI−SHORT
CYCLE TIMER
ENDS
YES
COMPRESSOR
CONTACTOR
ENERGIZED
WAITING FOR
TEMPERATURE
DROP TO OR
BELOW 225ºF
*
COMPRESSOR
CONTACTOR
ENERGIZED
HIGH
CLOSED
5−STRIKE
COUNTER
REACHES 5
WITHIN A SINGLE
Y1 DEMAND
DISCHARGE
SENSOR (RT28)
LOCKOUT
LED ALERT
CODE / OR
CRITICAL
ALERT 415
CLEARED
LED ALERT
CODE / OR
MODERATE
ALERT 414
CLEARED
Page 58
If temperature is at or above 279ºF.
SERVICE
2
REQUIRED
NORMAL
OPERATION