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ESIE05-03
Outdoor Unit Functional Concept
Part 2 – Functional Description
2–57
3
2
4
5
1
3.3.11 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 10 minutes.Oil recovery operation is only executed in cooling mode.In heating mode, oil
return to the compressor is guaranteed by the defrost operation.
Example
Trigger conditions for 71-class:
P
Compressor frequency
≤
63 Hz for 10 minutes continuously.
When the above conditions are fulfilled, a calculation of the oil discharge amount will be executed
according to the below formula:
P
Oil discharge amount = inverter frequency (Hz) x D x
∆
time
(D = constant value depending on outdoor unit type).
When the result of the above calculation is lower than a reference value programmed in the unit's
memory, the oil recovery operation will be started:
P
The compressor will operate at a frequency above 63Hz for 10 minutes continuously.
ESIE05-03.book Page 57 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...