Forced Thermostat Off - Daikin FCQ35B7V1 Service Manual

ESIE05-04
1.9

Forced Thermostat OFF

Outline The unit will perform the forced thermostat off function in following conditions:
Condition 1 Thermostat off due to freeze-up prevention.
(cooling)
Prevent the indoor unit heat exchanger from freezing in cooling operation when one of the below
conditions is applicable:
Condition 2 Thermostat off due to high outdoor temperature.
(heating)
When the outside temperature is > 30°CDB in heating mode, the unit will conduct a forced thermostat
off operation to protect the system.
Reference "Freeze Prevention Function". Refer to page 2-14.
Part 2 – Functional Description
Indoor unit heat exchanger temperature < -5°C for 1 minute continuously.
Indoor unit heat exchanger temperature < -1°C for 40 minutes accumulated.
Functional concept
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