ESIE15-13B Function Details
Function and Control 55
For RZQG71 the bottom plate heater and free cooling cannot be combined as there is no X28A
terminal present on the outdoor unit PCB.
Outdoor unit setting 2-53-xx
The customer will have the choice to select 2 parameters to control the activation of the free
cooling.
Use Mode 2 -53 - (STD: 01: function OFF)
With X and Y to be chosen:
X: Increase free cooling start point above thermo on
Y: Temperature difference between indoor and outdoor ambient temperature to start the free
cooling
It is important to make setting 26-7-02 in case of the use of free cooling. This to guarantee that
the free cooling will start up before the outdoor unit.
When the cooling capacity of the free cooling should not be enough then the outdoor unit will
kick in when thermo on.
Control logic of the compressor with setting 26-2-03/04
X6A
X77A
X28A
X800M
KRP58M51
Main PCB OU
Signal:
0V or 230V
Bottom plate
heater
-01 -02 -03 -04 -05 -06 -07
XOFF024024
Y OFF 5 5 5 10 10 10
ON
DT-rs-2
-2.5
-1 0 1 2
OFF
Compressor
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