SiBE28-804
Frequency Regulating Functions
Functional Description
77
Heating
High outdoor ambient (overload conditions):
In heating overload conditions, the outdoor fan speed will be adapted to secure the differential
pressure between high and low pressure.
RZQ100~140C7, RZQS125·140C7V1B
RZQ71C7, RZQ71·100C7V1B
Only the fan speed will be adapted in heating overload conditions.
No adjustments to the compressor frequency will be made.
4.12 Oil Recovery Operation
Outline
When the compressor operates for a certain period of time at low frequency, the oil level in the
compressor may become low due to incomplete oil return.To prevent damage to the
compressor and in worst case avoid compressor lock, an oil recovery operation will be
conducted.
Details
During the oil recovery operation, the operation frequency of the compressor will be increased
for a time period of 5 minutes.Oil recovery operation is only executed in cooling mode.In heating
mode, oil return to the compressor is guaranteed by the defrost operation.
Normal operation
Outdoor unit fan
–1 step/30 sec
Outdoor unit fan
+1 step/30 sec
•Hp-Lp < 0.39MPa
•Hp > 3.43MPa
OR
OR
•LP<0.12MP
•&
•OR
•OR
•&
•&
•HP < 2.75MPa
•Hp-Lp > 0.69MPa
•HP < 3.24 MPa
•Outdoor unit fan = 8 step
•Hp < 3.24MPa
•Outdoor unit fan = 8 step
•Hp-Lp > 0.59MPa
•Hp < 3.33MPa
•Hp-Lp > 1.08MPa
Normal operation
Outdoor unit fan
–1 step/30 sec
Outdoor unit fan
+1 step/30 sec
•Hp-Lp < 0.39MPa
•Hp > 3.14MPa
OR
OR
•LP<0.12MP
•&
•OR
•OR
•&
•Hp-Lp > 1.08MPa
•&
•HP < 2.45MPa
•Hp-Lp > 0.69MPa
•Hp < 2.94MPa
•Outdoor unit fan = 8 step
•Hp-Lp > 0.59MPa
•Hp < 3.04MPa
&
•Hp < 2.94MPa
•Outdoor unit fan = 8 step
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 ...