Samsung AQV18VBA Series User manual

Refer to the service manual in the GSPN(see the rear cover) for the more information.
AIR CONDITIONER CONTENTS
AQV18AAN, AQV24AAN
SPLIT-TYPE AIR CONDITIONER
INDOOR UNIT OUTDOOR UNIT
Basic : AQV18VBA
AQV24VBA
Model : AQV18AA Series
AQV24AA Series
Model Code : AQV18AAN AQV18AAX
AQV24AAN AQV24AAX
1. Precautions
2. Product Specifications
3. Disassembly and Reassembly
4. Troubleshooting
5. Exploded Views and Parts List
6. PCB Diagram and Parts List
7. Wiring Diagram
8. Schematic Diagram
9. Reference Sheet
AQV18AAX, AQV24AAX

Operating Instructions and Installation
Samsung Electronics 1
Contents
11. Precautions ........................................................................................................................................ 1-1
1-1 Precautions for the Service ............................................................................................................. 1-1
1-2 Precautions for the Static Electricity and PL ................................................................................ 1-1
1-3 Precautions for the Safety ............................................................................................................... 1-2
12. Product Specifications ............................................................................................................... 2-1
2-1 The Feature of Product .................................................................................................................... 2-1
2-1-1 The Feature of Product ........................................................................................................... 2-1
2-1-2 Modified items compared with Basic model ..................................................................... 2-2
2-1-3 New components to be applied .......................................................................................... 2-3
2-1-4. Characteristic of display ........................................................................................................ 2-4
2-2 The Comparative Specifications of Product ................................................................................ 2-5
2-3 Accessory and Option Specifications ........................................................................................... 2-6
2-3-1 Accessories ............................................................................................................................... 2-6
2-3-2 Filter ........................................................................................................................................... 2-8
13. Disassembly and Reassembly .............................................................................................. 3-1
3-1 Indoor Unit ......................................................................................................................................... 3-2
3-2 Outdoor Unit ..................................................................................................................................... 3-6
14. Troubleshooting ............................................................................................................................ 4-1
4-1 Setting Option Setup Method ....................................................................................................... 4-1
4-2 Display Error and Check Method .................................................................................................. 4-4
4-2-1 Display Error mode ................................................................................................................. 4-4
4-3 Fault Diagnosis by Symptom ........................................................................................................ 4-6
4-3-1 Communication error When / / / is diplayed ........ 4-6
4-3-2 Indoor Temperature Sensor ErrorWhen is diplayed ....................................... 4-7
4-3-3 Indoor Heat Exchanger Temperature Sensor ErrorWhen is diplayed ......... 4-8
4-3-4 Indoor Fan Motor Speed Detecting ErrorWhen is diplayed ......................... 4-9
4-3-5 MPI errorWhen is diplayed ................................................................................. 4-10
4-3-6 Outdoor temperature sensor errorWhen is diplayed .................................... 4-11
4-3-7 Coil temperature sensor errorWhen is diplayed ............................................. 4-12
4-3-8 Discharge temperature sensor errorWhen is diplayed ................................. 4-13
4-3-9 Discharge over temperature sensor errorWhen is diplayed ........................ 4-14
4-3-10 The Outdoor unit Fan errorWhen is diplayed ............................................... 4-15
4-3-11 Compressor start errorWhen is diplayed ....................................................... 4-16
4-3-12 I_Trip errorWhen is diplayed ............................................................................ 4-17
4-3-13 O.C.(Over Current) errorWhen is diplayed ..................................................... 4-18
4-3-14 DC-Link Voltage under/over error ..................................................................................... 4-19
4-3-15 Comp Rotation errorWhen is diplayed .......................................................... 4-20

Operating Instructions and Installation
2 Samsung Electronics
Contents
4-3-16 Total current Sensor errorWhen is diplayed .................................................. 4-20
4-3-17 DC-Link voltage sensor errorWhen is diplayed ............................................ 4-21
4-3-18 OTP error When is diplayed .............................................................................. 4-22
4-3-19 AC Line Zero Cross Signal out errorWhen is diplayed ................................. 4-22
4-3-20 Operation condition secession error ...................................................................................... 4-23
4-3-21 capacity miss match error When is diplayed .................................................... 4-23
4-4 PCB Inspection Method .................................................................................................................. 4-24
4-4-1 Pre-inspection Notices ............................................................................................................................. 4-24
4-4-2 Inspection Procedure ............................................................................................................................... 4-24
4-4-3 Indoor Detailed Inspection Procedure ............................................................................................. 4-24
4-4-4 Outdoor Detailed Inspection Procedure ........................................................................................ 4-25
4-5 Main Part Inspection Method ........................................................................................................ 4-26
15. Exploded Views and Parts List ............................................................................................. 5-1
5-1 Indoor Unit ......................................................................................................................................... 5-1
5-2 Outdoor Unit ..................................................................................................................................... 5-3
16. PCB Diagram and Parts List ................................................................................................... 6-1
6-1. Block Diagram .................................................................................................................................. 6-1
6-1-1. Indoor MAIN PCB ...................................................................................................................................... 6-1
6-1-2. Indoor MODULE PCB ............................................................................................................................... 6-2
6-1-3. Indoor DISPLAY PCB ................................................................................................................................ 6-2
6-1-4. Outdoor MAIN PCB .................................................................................................................................. 6-3
6-1-5. Outdoor EMI PCB ...................................................................................................................................... 6-4
6-2. Electrical Parts List ........................................................................................................................... 6-5
17. Wiring Diagram .............................................................................................................................. 7-1
18. Schematic Diagram ...................................................................................................................... 8-1
8-1.PCB Circuit Description .................................................................................................................... 8-1
8-1-1.Indoor Unit .................................................................................................................................................... 8-1
8-1-2.Display ............................................................................................................................................................ 8-3
8-2 Outdoor Unit .................................................................................................................................... 8-5
8-2-1.EMI .................................................................................................................................................................... 8-7
19. Reference Sheet .............................................................................................................................. 9-1
9-1 Refrigerating Cycle Diagram .......................................................................................................... 9-1
9-2 Index for Model Name ..................................................................................................................... 9-2
9-3 Distribution chart of the Pressure ................................................................................................. 9-3