Forced Thermostat Off - Daikin SkyAir Service Manual

SiBE28-804
1.8

Forced Thermostat OFF

The unit will perform the forced thermostat off function in following conditions:
"Freeze Prevention Function". Refer to P49.
Functional Description
Condition 1 (cooling)
Thermostat off due to freeze-up prevention.
Based on the judgment to prevent the indoor heat exchanger from freezing, the thermostat is
forcedly turned OFF.
Indoor unit
heat exchanger
temperature
(Te)
7ºC
4ºC
-1ºC
-3ºC
*1 FHQ Only
Condition 2 (heating)
Thermostat off due to high outdoor temperature.
RZQ71~140C7, RZQS71~140C7
When the outside temperature is > 32°CDB in heating mode, the unit will conduct a
forced thermostat off operation to protect the system.
Freeze prevention control
Reset after a continuous 10 minutes and cumulative
timer cleared after a continuous 10 minutes
Cumulative timer cleared after a continuous 20 minutes
The thermostat turns OFF after a cumulative 40
minutes
The thermostat turns OFF after a continuous 1 minute
after 8 minutes from startup (*1)
General Functionality
43