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SiUS121827E Control Specification
Part 4 Functions and Control 111
4.7 Freeze-up Protection Control
4.7.1 Freeze-up Protection Control (Except FDMQ Series)
Applicable
Models
FTXR09/12/18TVJUW(S)
CTXG09/12/18QVJUW(S)
CTXS07LVJU
FTXS09/12/15/18/24LVJU
FDXS09/12LVJU
CDXS15/18/24LVJU
FVXS09/12/15/18NVJU
FFQ09/12/15/18Q2VJU
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 is divided into
zones.
Details The operating frequency limitation is judged with the indoor heat exchanger temperature.
R4003451
Reset zone
Up zone
Keep zone
Dropping zone
Stop zone
13°C (55.4°F)
9.5°C (49.1°F)
5.5°C (41.9°F)
0°C (32°F)
7.5°C (45.5°F)
(Reference)
Indoor heat exchanger
temperature (R2T)
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