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ESIE05-03
General Functionality
Part 2 – Functional Description
2–19
3
2
4
5
1
1.14
Defrost Operation
Outline
When the unit is operating in heating mode, a defrost operation will be conducted in order to avoid ice
formation on the outdoor unit heat exchanger.
Defrost starting
conditions
Defrost will start when the following conditions have been realized:
Areas
Defrost upper limit A
P
Integrated compressor running time is 25 minutes or more since
the completion of the previous defrost operation.
&
OR
P
Defrost upper limit time A is met.
P
Low pressure saturated temperature (Te) is within the
defrost requesting area. (RZQ71)
P
Outdoor unit heat exchanger area temperature (Tb) is
within the defrost requesting area.
Defrost prohibiting area
Defrost permitting area
Evaporating temperature Te (°C)
or
Outdoor unit heat exchanger temperature Tb (°C)
When slightly quick defrost
starting is set
Factory setting
When slightly slow defrost
starting is set
When slightly quick defrost
starting is set
Defrost requesting area
When slightly quick defrost
starting is set
Factory setting
Outdoor
Temp. TA °C
When quick
defrost starting is
set 16(26)-3-03
Factory setting
16(26)-3-01
When slow
defrost starting is
set 16(26)-3-02
Outdoor temperature > -5°C
40 minutes
A hours
6 hours
Outdoor temperature
≤
-5°C
40 minutes
6 hours
8 hours
A hours
RZQ71
3 hours
RZQ100~140
2 hours
ESIE05-03.book Page 19 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...