Table of Contents
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TABLE OF CONTENTS
1.
Safety Precautions ............................................. 3
2.
Specifications ..................................................... 5
2.1
CU-2E18SBU ............................................... 5
3.
Dimensions ......................................................... 8
4.
Refrigeration Cycle Diagram ............................. 9
5.
Block Diagram .................................................. 10
6.
Wiring Connection Diagram ............................ 11
7.
Electronic Circuit Diagram .............................. 12
8.
Printed Circuit Board ....................................... 13
8.1
Main Printed Circuit Board ......................... 13
8.2
Noise Filter Printed Circuit Board ............... 14
8.3
Display Printed Circuit Board ..................... 14
9.
Installation Information .................................... 15
9.1
Check Points .............................................. 15
10.
Installation Instruction ..................................... 16
10.1
Unit ............................................................. 16
10.2
Cutting and Flaring the Piping .................... 16
10.3
Select the Best Location ............................. 17
10.4
Install the Outdoor Unit ............................... 18
10.5
Connect the Piping ..................................... 18
10.6
Evacuation of the Equipment ..................... 19
10.7
Connect the Cable to the Outdoor Unit ...... 20
10.8
Heat Insulation ............................................ 20
11.
Operation Control ............................................. 21
11.1
Cooling Operation ....................................... 21
11.2
Heating Operation ...................................... 22
12.
Simultaneous Operation Control .................... 23
13.
Protection Control ............................................ 24
13.1
Freeze Prevention Control (Cool) ............... 24
13.2
Dew Prevention Control (Cool) ................... 24
13.3
Protection 1 (Cool) ...................................... 24
13.4
Protection 2 (Cool) ...................................... 24
13.5
Cooling Overload Control (Cool) ................ 25
13.6
Heating Overload Control (Heat) ................ 25
13.7
13.8
Deice Control .............................................. 26
13.9
Control) ....................................................... 26
13.10
30 seconds Force Operation ...................... 26
13.11
Total Current Control .................................. 26
13.12
Control ........................................................ 26
13.13
detection control 1) ..................................... 27
13.14
detection control 2) ..................................... 27
13.15
Valve Close Detection Control ................... 27
PAGE
13.16
Compressor Discharge High Pressure
Protection Control .......................................27
14.
Servicing Mode .................................................28
14.1
CU-2E18SBU .............................................28
15.
Troubleshooting Guide ....................................30
15.1
Self Diagnosis Function ..............................30
16.
16.1
Outdoor Unit Removal Procedure ..............33
17.
Technical Data ..................................................36
17.1
Cool Mode Performance Data ....................36
17.2
Heat Mode Performance Data ....................38
18.
Service Data ......................................................40
18.1
Operation Characteristics ...........................40
19.
Exploded View and Replacement Parts
List .....................................................................44
2
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