Samsung AC024BXUPCH - Table of Contents

Contents
1. 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 ............................................................................................................................... 1-1
1-4. Precautions for Handling Refrigerant for Air Conditioner
........................................................................1-2
1-5. Precautions for Welding the Air Conditioner Pipe ...................................................................................... 1-2
1-6. Precautions for Additional Supplement of Air Conditioner Refrigerant ................................................ 1-2
1-7. Other Precautions..............................................................................................................................................1-2
2. Product Specifications ................................................................................................ 2-1
2-1. Outdoor Unit with AHU Control Unit .............................................................................................................2-1
2-2. Product Specifications .................................................................................................................................... 2-3
2-3. Specifications of optional items .................................................................................................................... 2-5
2-3-1. Accessories .............................................................................................................................................. 2-5
3. Disassembly and Reassembly.................................................................................... 3-1
3-1. Outdoor unit ...................................................................................................................................................... 3-2
3-1. AHU Control Unit ............................................................................................................................................3-25
4. Troubleshooting ......................................................................................................... 4-1
4-1. Diagnostic Checkliest ...................................................................................................................................... 4-1
4-1-1. Test operation mode and check mode ................................................................................................ 4-1
4-2. Troubleshooting by symptoms ..................................................................................................................... 4-7
4-2-1. When the outdoor unit power is not ON - Initial Diagnosis : Single phase products ................ 4-7
4-2-2. Communication error between outdoor unit INV ↔ MAIN MICOM (1 min.) - (E203) ................4-9
4-2-3. Outdoor sensor error - (E221, E231, E251, E320) .............................................................................4-10
4-2-4. High Pressure sensor error (Open/Short) - (E291) .........................................................................4-11
4-2-5. Suction Temperature sensor error (Open/Short) - (E308)
........................................................... 4-12
4-2-6. Compressor down due to freezing control - (E403) ....................................................................... 4-13
4-2-7. System stop due to overload protection control - (E404) ............................................................. 4-13
4-2-8. Comp. Down due to High Pressure Protection Control - (E407)
..................................................4-14
4-2-9. Comp. down due to low pressure sensor protection (E410) ......................................................... 4-15
4-2-10. Comp. down due to disharge temperature protection control - (E416) ................................... 4-16
4-2-11. Heating operation restricted at outdoor temperature over Theat_high value
 (default:86℉(30℃))-(E440) ........................................................................................................... 4-17
4-2-12. Cooling operation restricted at outdoor temperature over Tcool_low value
 (default:32℉(0℃))-(E441) ............................................................................................................. 4-17
4-2-13. Outdoor unit FAN error - (E458, E475)
............................................................................................ 4-18
4-2-14. Compressor error - (E461, 467) ........................................................................................................ 4-19
4-2-15. Current error - (E462, 484) ................................................................................................................ 4-21
4-2-16. Over Load Protection Error (E463)
..................................................................................................4-22
4-2-17. IPM (Over Current) error - (E464) ....................................................................................................4-23
4-2-18. Compressor over load error- (E465) ...............................................................................................4-26
4-2-19. DC Link voltage under/over error - (E466), Overvoltage of H/W detect DC Link error - (E483)
AC Input voltage sensor error - (E488) .......................................................................................... 4-27
4-2-20. Current sensor error - (E468) ...........................................................................................................4-28
4-2-21. DC Link voltage sensor error (Short/Open) - (E469)
....................................................................4-28
4-2-22. Outdoor unit EEPROM Read/Write error (Option) - (E470)
Outdoor unit EEPROM Read/Write error (H/W) - (E471) .............................................................4-28