Freeze-Up Protection Control - Daikin 2MXS-W Series Service Manual

Control Specification
4.7

Freeze-up Protection Control

4.7.1 Freeze-up Protection Control (Except CDMQ, FDMQ Series)
Applicable CTXS07WVJU9
Models FTXS09/12/15/18/24WVJU9
FTXR09/12/18WVJUW(S)9
FVXS09/12/15/18WVJU9
FFQ09/12/15/18W2VJU9
Outline During cooling operation, the signal sent from the indoor unit determines the frequency upper limit
and prevents freezing of the indoor heat exchanger. The signals from the indoor unit are divided
into zones.
Details
The operating frequency limitation is judged with the indoor heat exchanger temperature.
A
B
C
D
E
104
(Reference)
E
Reset zone
D
Up zone
C
Keep zone
B
Dropping zone
A
Stop zone
2/3/4MXS
°C °F °C
0 32 0
3 37.4 5.5
5 41 7.5
7 44.6 9.5
13 55.4 13
Indoor heat exchanger
temperature (R2T)
5MXS 2/3MXL(H)
°F °C
32 0
41.9 3
45.5 5
49.1 7
55.4 13
SiUS122226E
R4003891
4MXL(H)
°F °C °F
32 0 32
37.4 5.5 41.9
41 7.5 45.5
44.6 9.5 49.1
55.4 13 55.4
Part 4 Functions and Control