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Constant Fan
In Constant Fan mode, the Zoneline operates in
High Fan mode regardless of fan setting.
This feature allows the fan to operate even when
the Zoneline is set in the OFF position. This
will allow continuous air circulation in the room
even if the Zoneline is turned off. This function is
available as a selectable option through the use
of an Auxiliary Set button mode. The selection of
this function will override the CDC provision.
Fan Operation
Both fan motors are variable speed DC fan
motors with RPM feedback and regulation control.
Any time a fan is energized, the control checks
that the fan reaches the target RPM speed +/-
150 RPMs. If the target cannot be met, the fan
motor will shut down for 15 minutes, and will
set a fault code. It will reattempt to run every
15 minutes. If the fan motor reaches the proper
RPM, the fault code will clear. If the fault does
not clear, the fault code will be stored in memory
and the Zoneline will function as follows:
• For detected indoor fan failures, the Zoneline
will cease all operation until the next try to
energize the fan.
• For detected outdoor fan failures, the
Zoneline will revert to Stage 3 heating if it is
trying to run in Stage 1 or Stage 2 heating.
The Zoneline will then run the indoor fan only
if it is trying to run in Cooling Mode.
