Service manual

General Functionality ESIE04-01

2–22 Part 2 – Functional Description

1.17 Preheating Operation Control

Applicable units RZQ71

Outline After the compressor has been turned off, the preheating operation will be activated in order to avoid

refrigerant from dissolving in the compressor oil.

Trigger conditions

Starting conditions &

P or

P T2 (Discharge pipe temperature) < 20°C

P Ta (Outside temperature) < 20°C

P Power supply ON to First operation

P 60 minutes or more elapsed after compressor stop

Ending conditions or

P T2 (Discharge pipe temperature) > 23°C

P Ta (Outside temperature) > 23°C

P Thermostat ON confirmation

RZQ - Final.book Page 22 Monday, September 20, 2004 11:24 AM