Control Specification
SiUS041501E
41
Function and Control
3.6
Freeze-up Protection Control
During cooling operation, the signal sent from the indoor unit determines the frequency upper limit
and prevents freezing of the indoor heat exchanger. (The signal from the indoor unit is divided into
zones.)
The operating frequency limitation is judged with the indoor heat exchanger temperature.
3.7
Heating Peak-cut Control
During heating operation, the indoor heat exchanger temperature determines the frequency upper
limit to prevent abnormal high pressure.
The operating frequency limitation is judged with the indoor heat exchanger temperature.
(R21660)
Reset zone
Indoor heat exchanger
thermistor temperature
Up zone
Keep zone
Dropping zone
Stop zone
13˚C (55.4˚F)
(Reference)
7˚C (44.6˚F)
5˚C (41.0˚F)
3˚C (37.4˚F)
0˚C (32.0˚F)
09/12 class
RXN18NMVJU
RX18NMVJU
24 class
(°C)
(°F)
(°C)
(°F)
A
59
138.2 60
140.0
B
55
131.0 54
129.2
C
52
125.6 51
123.8
D
50
122.0 49
120.2
E
45
113.0 44
111.2
Zone
Control
Stop zone
When the temperature reaches the stop zone, the compressor stops.
Dropping zone
The upper limit of frequency decreases.
Keep zone
The upper limit of frequency is kept.
Up zone
The upper limit of frequency increases.
Reset zone
The upper limit of frequency is canceled.
Indoor heat exchanger
thermistor temperature
Stop zone
Dropping zone
Keep zone
Up zone
Reset zone
(R14665)
D
C
B
A
E
Summary of Contents for FTKN09NMVJU
Page 12: ...SiUS041501E 1 List of Functions Part 1 List of Functions 1 Functions 2...
Page 59: ...SiUS041501E Remote Controller 48 Part 5 Remote Controller 1 Cooling Only 49 2 Heat Pump 51...
Page 65: ...SiUS041501E Service Diagnosis 54 5 13 Power Module Check 100...
Page 132: ...Revision History Month Year Version Revised contents 03 2015 SiUS041501E First edition...