Daikin RZQG71L9V1 Service Manual page 69

ESIE15-13C
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
Compressor
Function and Control
Main PCB OU
X6A
X77A
X28A
Bottom plate
heater 0V or 230V
-01 -02
X OFF 0
Y OFF 5
ON
OFF
-2.5
KRP58M51
X800M
Signal:
-03 -04 -05
2 4 0
5 5 10
-2 -1 0 1 2
Function Details
-06 -07
2 4
10 10
DT-rs
55