ESIE05-03
Outdoor Unit Functional Concept
Part 2 – Functional Description
2–45
3
2
4
5
1
3.3.2
General Frequency Control
Outline
After the "Starting frequency control" function has been terminated, the ideal compressor frequency
will be determined by the "General frequency control".
General
The compressor operation frequency is controlled in order to keep a constant evaporation temperature
in cooling and a constant condensing temperature in heating.
The frequency can be changed every 20 seconds.The maximum frequency change = 2 steps/change.
(= max 6 steps/min)
During abnormal situations (e.g. inverter current protection) the change per step is also =
2 steps/change, but the 20 seconds interval may be decreased, so a quicker change is possible.
Note
When other control functions are activated (e.g. discharge pipe control), they can change the
compressor frequency using other inputs than the ones normally being used by the "General
frequency control" function.
Cooling
In cooling, the target operation frequency will be determined by the indoor
∆
t and the evaporating
temperature.
∆
t cool = Remote controller set temperature - Indoor return air temperature.
Depending on the cooling load, the target evaporating temperature (Te) will be a value between 2°C
≤
Te
≤
20°C.
Heating
In heating, the target operation frequency will be determined by the indoor
∆
t and the condensing
temperature.
∆
t heat = Indoor return air temperature - Remote controller set temperature.
Depending on the heating load, the target condensing temperature (Tc) will be a value between 42°C
≤
Tc
≤
51°C.
ESIE05-03.book Page 45 Wednesday, April 6, 2005 4:09 PM
Summary of Contents for RZQ100B7W1B
Page 1: ...Service Manual ESIE05 03 RZQ71 125B8V3B RZQ100 140B7W1B Sky Air Inverter R 410A B series...
Page 2: ......
Page 10: ...ESIE05 03 viii Table of Contents 3 1 4 5...
Page 24: ...ESIE05 03 1 2 Part 1 System Outline 3 1 1 5...
Page 32: ...General Outline Outdoor Units ESIE05 03 1 10 Part 1 System Outline 3 1 1 4 5...
Page 42: ...Specifications ESIE05 03 1 20 Part 1 System Outline 3 1 1 4 5...
Page 56: ...Functional Diagrams ESIE05 03 1 34 Part 1 System Outline 3 1 1 4 5...
Page 58: ...ESIE05 03 1 36 Part 1 System Outline...
Page 70: ...Wiring Diagrams ESIE05 03 1 48 Part 1 System Outline 3 1 1 4 5...
Page 84: ...PCB Layout ESIE05 03 1 62 Part 1 System Outline 3 1 1 4 5...
Page 86: ...ESIE05 03 2 2 Part 2 Functional Description 3 1 2 5...
Page 110: ...General Functionality ESIE05 03 2 26 Part 2 Functional Description 3 1 2 4 5...
Page 150: ...ESIE05 03 3 2 Part 3 Troubleshooting 3 1 3 5...
Page 188: ...Troubleshooting ESIE05 03 3 40 Part 3 Troubleshooting 3 1 3 4 5...
Page 264: ...Additional Checks for Troubleshooting ESIE05 03 3 116 Part 3 Troubleshooting 3 1 3 4 5...
Page 266: ...ESIE05 03 4 2 Part 4 Commissioning and Test Run 3 1 4 5...
Page 306: ...ESIE05 03 5 2 Part 5 Disassembly and Maintenance 3 1 5...