Freeze Prevention Function - Daikin FCQ35B7V1 Service Manual

Functional concept
1.10

Freeze Prevention Function

1
Purpose
2
Freeze Prevention
start conditions
3
Freeze Prevention
stop conditions
4
Parameters
5
2–14
In order to avoid formation of ice on the indoor unit heat exchanger in cooling and dry mode, the
system automatically starts up a freeze prevention cycle when a number of specific conditions are
fulfilled.
Freeze prevention start decided by the indoor unit (factory setting):
Indoor coil temperature ≤ -1°C for 40 minutes accumulated
OR
Indoor coil temperature < A°C for 1 minute continuous
&
Compressor is running for minimum 8 minutes since
operation start or end of previous freeze up cycle.
Freeze prevention stop decided by the indoor unit (factory setting):
Indoor coil temperature > 7°C for 10 minutes continuous
FAQ
A -1°C
FHQ All except FAQ & FHQ
-3°C
Part 2 – Functional Description
ESIE05-04
-5°C