Samsung AJ007JNADCH User manual

AIR CONDITIONER CONTENTS
MULTI AIR CONDITIONER
3. Disassembly and Reassembly
4. Troubleshooting
5. PCB Diagram and Parts List
6. Wiring Diagram
7. Schematic Diagram
8. Reference Sheet
INDOOR UNIT
AJ007/009/012/018/024JNADCH
AJ009/012/018JNNDCH
AJ009/012/018JNLDCH
OUTDOOR UNIT
AJ020MCS3CH
AJ024MCS4CH
AJ030MCS4CH
1. Precautions

G
Contents
11. Precautions 1-1
1-1 Installing the air conditioner 1-1
1-2 Power supply and circuit breaker 1-1
1-3 During operation 1-2
1-4 Disposing of the unit 1-2
1-5 Others 1-2
12. Product Spe 2-1
2-1 The Feature of Product 2-1
2-2 Product S cations 2-2
2-3 The Comparative of Product 2-14
2-4 Accessory and Option Speci cations 2-22
3. Disassembly and Reassembly 3-1
3-1 Outdoor Unit 3-2
4. Trouble shooting 4-1
4-1 Display Error and Check Method 4-1
4-2 Setting and indoor unit address and installation option
4-3 Setting Option Setup Method
4-10
4-4 Items to be checked rst
Setting to Cool or Heat only mode, checking and Cool/Heat modes operation test
Fault Diagnosis by Symptom
4-11
4-27
4-5 4-35
4-6 4-36
PCB Inspection4-7 4-47
5. PCB Diagram and Parts list 5-1
5-1 Indoor Unit 5-1
5-2 Outdoor Unit 5-10
6. Wiring Diagram 6-1
6-1 Indoor Unit 6-1
6-2 Outdoor Unit 6-8
1
7. Schematic Diagram 7-1
7-1 Indoor Unit 7-1
7-2 Outdoor Unit 7-7
8. Reference Sheet 8-1
8-1 Selecting Area for Installation 8-1
8-2 Connecting Up and Purging the Circuit 8-3
8-3 8-4
8-4 Refrigerant Adjustment 8-5
8-5 Flare Nut Fixing Torque 8-5
8-6 Pump down Procedure 8-6
8-7 Index of Model Name 8-8
8-8 Refrigerant Cycle Diagram 8-13
8-9 Pressure & Capacity mark 8-16
8-10 The abbreviated technology word 8-16
8-11 Q&A for Non-trouble 8-17
8-12 Common sense of refrigeration 8-20

Samsung Electronics 1-1
1. Precautions
1-1 Installing the air conditioner
Users should not install the air conditioner by themselves.
Ask the dealer or authorized company to install the air conditioner except the
window-type air conditioner in U.S.A and Canada.
If you don’t install the air conditioner properly, it may cause a re, a water leak-
age or an electric shock.
You must install the air conditioner according to the national wiring regulations
and safety regulations.
Install the indoor unit higher than 8.2 ft from the oor to avoid the injury caused
by the operation of the fan. (except the window-type air conditioner)
The manufacturer is not responsible for any accidents or injury caused by an
incorrect installation.
When installing the built-in type air conditioner, keep all electric cables such as
the power cable and the connection cord in pipes, ducts, or cable channels to
protect them from the danger of impact or any other incidents.
More than 2 indoor units should be installed when you use Free Joint Multi air
conditioner.
AJ020MCS3CH
- **018/024** indoor units cannot be connected.
AJ024MCS4CH
- AJ024JNADCH indoor units cannot be connected.
1-2 Power supply and circuit breaker
If the power cord of the air conditioner is damaged, it must be replaced by the
manufacturer or a qualied person in order to avoid a hazard.
The air conditioner must be plugged into an independent circuit if applicable or
connect the power cable to the auxiliary circuit breaker.
An all pole disconnection from the power supply must be incorporated in
the xed wiring with a contact opening of > 0.12 inch.
Do not extend an electric cord to the air conditioner.
The air conditioner must be plugged in after you complete the installation.
suoregnad
Avoid Dangerous Contact
No Tapping and No Extension Cords

1-2 Samsung Electronics
1-4 Disposing of the unit
O Before throwing out the air conditioner, remove the batteries from the remote control.
O When you dispose of the air conditioner, consult your dealer. If pipes are removed incorrectly, refrigerant may blow out and cause
air pollution. When it contacts with your skin, it can cause skin injury.
O The package of the air conditioner should be recycled or disposed of properly for environmental reasons.
1-5 Others
O Never store or load the air conditioner upside down or sideways to prevent the damage to the compressor.
O Young children or infirm persons should be always supervised when they use the air conditioner.
O Max current is measured according to IEC standard for safety.
O Current is measured according to ISO standard for energy efficiency.
O When installing, make sure there is no leakage. When recovering the refrigerant, ground the compressor first before removingthe
connection pipe. If the refrigerant pipe is not properly connected and the compressor works with the service valve open, the pipe
inhales the air and it makes the pressure inside of the refrigerant cycle abnormally high. It may cause explosion and injury.
O Pump Down Procedure (When removing the product)
- Turn on the air conditioner and select Cool mode to run the compressor for 3 minutes.
- Release the valve caps on High and Low pressure side.
- Use L wrench to close the valve on the high pressure side.
- Approximately 2 minutes after, close the valve on the low pressure side.
- Stop operation of the air conditioner.- Disconnect the pipes.
1-3 During operation
O  Do not repair the air conditioner at your discretion.
It is recommended to contact a service center directly.
O Never spill any kind of liquid on the air conditioner.
If this happens, turn off the air conditioner and contact an authorized service cen-
ter.
O Do not insert anything between the airflow blades to prevent damage of the inner
fan and consequent injury. Keep children away from the air conditioner.
O Do not place any obstacles in front of the air conditioner.
O Do not spray any kind of liquid into the indoor unit. If this happens, turn off the air
conditioner and contact a service center.
O Make sure that the air conditioner is well ventilated at all times:
Do not place a cloth or other materials over it.
O Remove the batteries if you don’t use the remote control for a long time. (If appli-
cable)
O Use the remote control within 7 meters from the indoor unit. (If applicable)
No children Nearby

Samsung Electronics 2-1
2. Product Specications
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'HYHORSPHQW0RGHO
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