Control Specification
SiUS071735EB
37
Functions and Control
2.6 Freeze-up Protection Control
Outline
During cooling operation, the signal sent from the indoor unit determines the frequency upper limit
and prevents the indoor heat exchanger from freezing.
Details
When the freeze-up protection control starts, the compressor stops, the airflow rate is fixed to L tap,
and the drain pump turns ON. Conditions for starting and ending are as below.
Starting conditions
The freeze-up protection control starts when any of the following conditions is satisfied.
The indoor heat exchanger temperature remains at
A
or lower for 1 minute.
The accumulated time that the indoor heat exchanger temperature remains at
B
or lower
reaches 40 minutes.
Accumulated timer clearing condition
The indoor heat exchanger temperature remains at
C
or higher for 20 minutes.
Ending condition
The indoor heat exchanger temperature remains at
D
or higher for 10 minutes.
(°C)
(°F)
A
–5
23.0
B
–1
30.2
C
4
39.2
D
7
44.6
D
A
B
C
Indoor heat
exchanger
temperature
The control starts.
The control starts.
The control ends
and the accumulated timer is cleared.
The accumulated timer is cleared.
Summary of Contents for FDMQ09RVJU
Page 12: ...SiUS071735EB 1 List of Functions Part 1 List of Functions 1 Functions 2 ...
Page 14: ...SiUS071735EB 3 Specifications Part 2 Specifications 1 Specifications 4 ...
Page 125: ...SiUS071735EB Check Service Diagnosis 114 15 18 24 class R25105 1 2 3 4 Multimeter ...
Page 127: ...SiUS071735EB Check Service Diagnosis 116 15 18 24 class R20704 W V U DC_P1 DC_N1 ...
