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MCH3U-27PHH2
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131 pages
Manual
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65
Remark:
Use a multimeter to
test the DC
voltage between black p
in and
white pin of signal w
ire The normal
value should be around
5V.
Use a multimeter to
test the DC
voltage between black p
in and red
pin of signal wire. The no
rmal
value
should be around 12
V.
64
66
Table of Contents
Main Page
Table of Contents
1
Indoor Unit Combination
4
Dimension of Outdoor Unit
6
Refrigerant Cycle Diagram
7
Installation Details
10
Wrench Torque Sheet for Installation
10
Connecting the Cables
10
Pipe Length and the Elevation
10
First-Time Installation
11
Adding Refrigerant after Long-Term System Operation
12
Procedure When Servicing the Indoor Unit Refrigeration Circuit
12
Evacuation after Servicing the Outdoor Unit Refrigeration Circuit
14
Electronic Function
15
Abbreviation
15
Electric Control Working Environment
15
Main Protection
15
Control and Functions
17
Heating Mode
18
Wiring Diagrams
23
Troubleshooting
33
Safety
33
Indoor Unit Error Display
34
Outdoor Unit Display
37
Diagnosis and Solution
42
Trouble Criterion of Main Parts
91
Disassembly Instructions
103
MCH2U-18PHH2 (WCA30 Metal Plate)
103
MCH3U-27PHH2 (WD30 Metal Plate)
110
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