Overview of the cooling mode functions ESIE02–01
2–34 Part 2 – Functional Description
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2.7 High Pressure Protection Control in Cooling Operation
Applicable units R(Y)P71-250B
Purpose The purpose of the high pressure protection is to prevent a shutdown due to an error.
Method 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
Thermostat OFF
after 90 s
continuously
Max.
Min.
The temp. shifts:
+1˚C for each therm. OFF operation
-1˚C for each HPS activation
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