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SiBE28-804
Frequency Regulating Functions
Functional Description
65
4.3
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
≤
54°C.
Summary of Contents for FHQ100BUV1B x 2
Page 13: ...SiBE28 804 2 ...
Page 19: ...Model Name and Power Supply SiBE28 804 8 General Information ...
Page 29: ...Specifications SiBE28 804 18 Specifications ...
Page 33: ...Wired Remote Controller SiBE28 804 22 Remote Controller 1 2 Installation ...
Page 34: ...SiBE28 804 Wired Remote Controller Remote Controller 23 ...
Page 93: ...Outdoor Unit Fan Speed Control SiBE28 804 82 Functional Description ...
Page 131: ...Test Run and Operation Data SiBE28 804 120 Test Operation ...
Page 251: ...Troubleshooting by Remote Controller Display LED Display SiBE28 804 240 Troubleshooting ...
Page 277: ...PCB Layout SiBE28 804 266 Appendix ...
Page 297: ...RZQ100 140C7 RZQS125 140C7V1B SiBE28 804 286 Removal Procedure ...
Page 311: ...SiBE28 804 iv Index ...