Control Specification
SiUS042113E
62
Part 4 Functions and Control
Details
1.
Determine command frequency
Command frequency is determined in the following order of priority.
(1) Limiting defrost control time
(2) Forced cooling
(3) Indoor frequency command
2.
Determine upper limit frequency
The minimum value is set as an upper limit frequency among the frequency upper limits of the
following functions:
Compressor protection, input current, discharge pipe temperature, heating peak-cut, freeze-up
protection, defrost control.
3.
Determine lower limit frequency
The maximum value is set as an lower limit frequency among the frequency lower limits of the
following functions:
Four way valve operation compensation, draft prevention, pressure difference upkeep.
4.
Determine prohibited frequency
There is a certain prohibited frequency such as a power supply frequency.
Initial Frequency
When starting the compressor, the frequency is initialized according to the
D value of the indoor
unit.
D signal: Indoor frequency command
The difference between the room thermistor temperature and the target temperature is taken as the
D value and is used for
D signal of frequency command.
D signal for cooling
OFF = Thermostat OFF
D signal for heating
OFF = Thermostat OFF
Temperature
difference
D
signal
Temperature
difference
D
signal
Temperature
difference
D
signal
–2.0°C (–3.6°F)
OFF
0°C (0°F)
4
2.0°C (3.6°F)
8
–1.5°C (–2.7°F)
1
0.5°C (0.9°F)
5
2.5°C (4.5°F)
9
–1.0°C (–1.8°F)
2
1.0°C (1.8°F)
6
—
—
–0.5°C (–0.9°F)
3
1.5°C (2.7°F)
7
—
—
Temperature
difference
D
signal
Temperature
difference
D
signal
Temperature
difference
D
signal
–2.0°C (–3.6°F)
OFF
0°C (0°F)
4
2.0°C (3.6°F)
8
–1.5°C (–2.7°F)
1
0.5°C (0.9°F)
5
2.5°C (4.5°F)
9
–1.0°C (–1.8°F)
2
1.0°C (1.8°F)
6
3.0°C (5.4°F)
10
–0.5°C (–0.9°F)
3
1.5°C (2.7°F)
7
3.5°C (6.3°F)
11
Содержание FTXM-V Series
Страница 13: ...SiUS042113E Part 1 General Information 9 1 Applicable Models 10 2 Functions 11 Part 1 General Information...
Страница 16: ...SiUS042113E 12 Part 2 Specifications 1 Specifications 13 Part 2 Specifications...
Страница 96: ...Troubleshooting SiUS042113E 92 Part 6 Service Diagnosis Reference Check No 01 Refer to P 134...
Страница 147: ...SiUS042113E Check Part 6 Service Diagnosis 143 09 12 class 18 24 class 1 2 3 4 Multimeter R24538 1 2 3 4 Multimeter...
Страница 150: ...Check SiUS042113E 146 Part 6 Service Diagnosis 18 24 class R24539 DC DC W V U...
Страница 165: ...SiUS042113E Piping Diagrams Part 8 Appendix 161 1 2 Outdoor Unit RXM09 12VVJU RXM18VVJU 3D131979 3D132216...
Страница 166: ...Piping Diagrams SiUS042113E 162 Part 8 Appendix RXM24VVJU 3D132217...
Страница 171: ...SiUS042113E Operation Limit Part 8 Appendix 167 3 Operation Limit RXM09 12 18 24VVJU 3D133582A...
