SiUS071735EA
Control Specification
Functions and Control
36
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.
z
The indoor heat exchanger temperature remains at
A
or lower for 1 minute.
z
The accumulated time that the indoor heat exchanger temperature remains at
B
or lower
reaches 40 minutes.
Accumulated timer clearing condition
z
The indoor heat exchanger temperature remains at
C
or higher for 20 minutes.
Ending condition
z
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 FDMQ-R Series
Page 12: ...SiUS071735EA 1 List of Functions Part 1 List of Functions 1 Functions 2...
Page 14: ...SiUS071735EA 3 Specifications Part 2 Specifications 1 Specifications 4...
Page 120: ...Check SiUS071735EA 109 Service Diagnosis 15 18 24 class R25105 1 2 3 4 Multimeter...
Page 122: ...Check SiUS071735EA 111 Service Diagnosis 15 18 24 class R20704 W V U DC_P1 DC_N1...
Page 140: ...Piping Diagrams SiUS071735EA 129 Appendix RX24RMVJU A 3D092249A...
