IBC AHU 800, Installation & Operating Manual

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Mode Call From Activity
humidification the AHU will activate the dehumidifier as required.
Cold Air Sentry Return air
temperature
sensor
Cold Air Sentry mode monitors the return air
temperature into the air handling appliance.
If the internal return air temperature sensor detects a
return air temperature below 41 °F, the air handling
appliance will energize the fan, the pump contacts, and
the TT (boiler) contacts to create a call for heat. When
the return air temperature increases to 46 °F or more
the air handling appliance will turn off the fan, TT
(boiler) contacts, and pump contacts.
If the internal return air temperature sensor detects a
return air temperature below 35 °F, the air handling
appliance will turn off the fan, and continue to energize
TT (boiler) contacts and pump contacts.
4.2 Status indicators
The appliance displays four LED indicators, each representing an operating status.
POWER (Green background) FAULT (Red
background)
HEAT (Green
background)
COOL (Green
background)
State LED(s) Description
Standby FAULT HEAT COOL LEDs blink on and off
Heating HEAT LED displays a steady state.
Cooling COOL LED displays a steady state.
Fan only
(G) HEAT COOL Short synchronized flashing.
Warning FAULT LED flashes on. The appliance will
continue to operate; however,
certain operations may not function
correctly.
Fault FAULT LED displays a steady state. The
appliance will not service heat or
cooling calls.
Connected
to app FAULT HEAT COOL Each LED blinks on and off twice
repeatedly.
Table 13 Status indicators
60
Section: Operation