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AB Industrietechnik srl – Via Julius Durst, 70 – 39042 BRESSANONE (BZ) Italy – Tel: +39 0472/830626 – [email protected] – www.industrietechnik.it
During operation, the ON or OFF icons indicate the status of the heat exchanger:
Icon status
Indication
ON icon is on
Heat recovery in progress (bypass damper closed)
OFF icon is displayed
Heat exchanger in frost protection mode
(ON icon is on; OFF icon is off)
alternating with
(ON icon is off, OFF icon is on).
(The
icon is flashing to indicate
free heating or cooling in progress).
Partial heat recovery because the modulating bypass damper is regu
-
lated based on the current cooling/heating request during free cooling or
free heating conditions (bypass damper partially open)
OFF icon is on
No heat recovery because of free cooling and/or heating (bypass
damper completely open) or in case of frost protection alarm of the heat
exchanger (if
186
=1)
By Modbus, it is also possible to see the status of the heat exchanger (see the Modbus variables table
“41. Modbus (for AHU-
xMxSx1 models)” page 137
).