Unit Control; Integral Control Concept; Control Principle Diagram - Gree GRS-CQ8.0Pd/NaEK Service Manual

Unit Control

1 Integral Control Concept

1.1 Control Principle Diagram

1. The environment temperature is detected by the sensor installed at fins of the finned heat
exchanger, which is mainly used to control the initialization steps of the fan and the electrostatic
expansion valve and also limit the maximum running frequency of the compressor. When this sensor
fails, the main board will detect it and deliver this error message to the controller and then the unit will fail
to start up or shut down.
2. The defrosting temperature is detected by the sensor installed at the defrosting pipes of the
finned heat exchanger, which is mainly used to control defrosting. When this sensor fails at the heating
Unit Control
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