High Pressure Protection Control In Cooling Operation - Daikin Sky Air R-407C Service Manual

Overview of the cooling mode functions
2.7

High Pressure Protection Control in Cooling Operation

1
Applicable units
Purpose
2
Method
3
4
5
2–34
R(Y)P71-250B
The purpose of the high pressure protection is to prevent a shutdown due to an error.
The thermostat turns OFF immediately before HPS activation according to the outdoor heat exchanger
temperature (Tc).
Outd. unit
heat exchanger
temp. (Tc)
Thermostat control
HPS retry
6th time: E3-error
Max.
The temp. shifts:
Thermostat OFF
+1˚C for each therm. OFF operation
after 90 s
-1˚C for each HPS activation
continuously
Min.
ESIE02–01
Part 2 – Functional Description