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CU-4KS31NBU Owner's Manual - Page 1
TECHNICAL & SERVICE MANUAL
OUTDOOR UNIT : CU-3KS19NBU CU-4KS24NBU CU-4KS31NBU
DC INVERTER MULTI-SYSTEM AIR CONDITIONER
Capacity at 230V 19,700 BTU/h 25,400 BTU/h 30,600 BTU/h
Outdoor Model No. SM700877 REFERENCE NO.
Pay special attention when servicing the unit. CU-3KS19NBU CU-4KS24NBU CU-4KS31NBU
Product Code No. 1 852 361 24 1 852 361 25 1 852 361 26
CU-3KS19NBU CU-4KS24NBU
< ...
CU-4KS31NBU Owner's Manual - Page 76
... elsewhere. Sequence
CU-3KS19NBU MV0 MV1 MV2
CU-4KS24NBU CU-4KS31NBU
MV0 MV1 MV2 MV3
Check the illumination of the electric expansion valve. Model No.
Labels are applied to the valve body and coil, corresponding to the connector colors, to check it is turned ON, the needle will changed.)
76
Replace the controller. Replace the coil.
*1
Open...
CU-4KS31NBU Owner's Manual - Page 86
APPENDIX A INSTALLATION INSTRUCTIONS CU-3KS19NBU CU-4KS24NBU CU-4KS31NBU
(852-6-4190-581-00-1)
A-1
CU-4KS31NBU Owner's Manual - Page 87
...MKS12NB4U CS-KS18NB4UW
Outdoor Unit CU-3KS19NBU CU-4KS24NBU CU-4KS31NBU
Power Source: 60 Hz, single-phase, 230 / 208 VAC
1. Optional Copper Tubing Kit 1-4. Diagram of Outdoor Unit 2-6. INSTALLATION PROCESS 16 3-1. Flaring Procedure with Unit 1-3. Tubing Connections 3-6. Recommended Wire Length and Diameter 5-3. For Outdoor Unit
INSTALLATION INSTRUCTIONS Split System Air Conditioner...
CU-4KS31NBU Owner's Manual - Page 88
... and strong enough to support or hold the unit's weight. SPECIAL PRECAUTIONS
WARNING When Wiring
ELECTRICAL SHOCK CAN CAUSE SEVERE PERSONAL INJURY OR DEATH. It may be responsible for improper installation or maintenance service, including failure to help for a special problem, contact our sales/service outlet or your certified dealer for additional instructions. Please Read Before Starting...
CU-4KS31NBU Owner's Manual - Page 90
...
Q'ty
Parts
4
Reducer (1/2" 3/8")
Figure
Q'ty
CU-4KS24NBU 1
CU-4KS31NBU 2
Packed in Table 2.
Insulated staples or clamps for field wiring. Knife or wire stripper
9. Foamed polyethylene insulation for refrigerant tubing as required to install the air conditioning system. Wiring Instructions for deburring) 16. CAUTION
Check local electrical codes and regulations...
CU-4KS31NBU Owner's Manual - Page 92
...or connecting wires used for television, radio, telephone, security system, or intercom.
CU-4KS24NBU
82
150 (L1+L2+L3+L4)
200 (L1+L2+L3+L4)
50
0.22
CU-4KS31NBU
100...
150 (L1+L2+L3+L4)
230 (L1+L2+L3+L4)
50
0.22
* If total tubing length becomes 150 to 200 ft. (Max.) or 150 to the Technical & Service Manual...
CU-4KS31NBU Owner's Manual - Page 108
... diameter differ from locality to be done tightly and in Table 6.
Power Line Length (ft.) Max. Table 6
Model
AWG
CU-3KS19NBU CU-4KS24NBU CU-4KS31NBU
Max. Wiring Instructions
5-1. Table 6 shows maximum wire lengths for any moving parts of the unit as a result of (A), (B), and (C) in accordance with a power supply disconnect and circuit breaker for the meaning of such...
CU-4KS31NBU Owner's Manual - Page 109
... unit to the outdoor unit (size of wire and wiring method, etc.).
Each wire must be grounded.
For the installation of a grounding device, please observe local electrical codes.
Grounding is necessary, especially for antenna... electricity and electrical noise caused by national or local codes. CAUTION
Always comply with CU-4KS24NBU, CU-4KS31NBU
L1 Power supply L2 Single-phase 230/208VAC ...
CU-3KS19NBU/CU-4KS24NBU/CU-4KS31NBU - Installation Manual - Page 2
...the Outdoor Unit 2-5. GENERAL 4 1-1. Finishing the Installation
4. Wiring Instructions for Installation
2. Model No. General Precautions on Wiring 5-2. NOTE External diameter of Outdoor Unit 2-6. Indoor Unit CS-MKS7NKU CS-MKS9NKU CS-MKS12NKU CS-MKS18NKU CS-MKS24NKU CS-MKS9NB4U CS-MKS12NB4U CS-KS18NB4UW
Outdoor Unit CU-3KS19NBU CU-4KS24NBU CU-4KS31NBU
Power Source: 60 Hz...
CU-3KS19NBU/CU-4KS24NBU/CU-4KS31NBU - Installation Manual - Page 3
...
‡ :KHQSHUIRUPLQJpiping work do not mix air except for improper installation or maintenance service, including failure to follow the instructions in this instruction booklet before beginning.
Follow each installation or repair step exactly as this document. SPECIAL PRECAUTIONS
WARNING When Wiring
ELECTRICAL SHOCK CAN CAUSE SEVERE PERSONAL INJURY OR DEATH. CAUTION
Keep the fire...
CU-3KS19NBU/CU-4KS24NBU/CU-4KS31NBU - Installation Manual - Page 5
... staples or clamps for field wiring. Standard screwdriver
7. Type of instructions for inter-unit cable and tube
ABCD
4 each tube to the appropriate lengths 1' to 1'4" (30 cm to 40 cm) to precise length of tubing. Cut each Cushion rubber
Reducer (3/8" 1/2")
CU-3KS19NBU 1
Figure
Q'ty
Parts
4
Reducer (1/2" 3/8")
Figure
Q'ty
CU-4KS24NBU 1
CU-4KS31NBU 2
Packed in Table...
CU-3KS19NBU/CU-4KS24NBU/CU-4KS31NBU - Installation Manual - Page 7
...) by 0.22 oz./ft. CU-4KS24NBU
82
150 (L1+L2+L3+L4)
200 (L1+L2+L3+L4)
50
0.22
CU-4KS31NBU
100
150 (L1+L2+L3+L4)
230 (L1+L2+L3+L4)
50
0.22
* If total tubing length becomes 150 to 200 ft. (Max.) or 150 to the Technical & Service Manual.
6 Allowable Tubing Length Per...
CU-3KS19NBU/CU-4KS24NBU/CU-4KS31NBU - Installation Manual - Page 23
... moving parts of the fan.
(6) Unauthorized changes in the internal wiring can ...wiring connection must be very dangerous. Table 6
Model
AWG
CU-3KS19NBU CU-4KS24NBU CU-4KS31NBU
Max. Power Line Length (ft.) Max. Carefully observe these regulations when carrying out the installation.
Wrong wiring may cause the unit to misoperate or become damaged.
(5) Do not allow wiring to your local codes...
CU-3KS19NBU/CU-4KS24NBU/CU-4KS31NBU - Installation Manual - Page 24
...wire and wiring method, etc.).
Each wire must be grounded.
For the installation of a grounding device, please observe local electrical codes.
Grounding is necessary, especially for antenna, signal, or power lines of television, radio, stereo, telephone, security system, or intercom any moving part...connect power wires correctly match- CAUTION
Always comply with CU-4KS24NBU, CU-4KS31NBU
...
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