Brand: SAMSUNG
Category: Air Conditioner
Document Type: Parts/Service
Language: EN
Parts/Service for AQV12NSAN
Uploaded: Nov. 21, 2025, 6:27 p.m.
The manual provides detailed information on the disassembly and reassembly of Samsung split-type air conditioners, specifically for models AQV09UGAN and AQV12UGAN. It includes necessary tools, step-by-step instructions for both indoor and outdoor units, and visual aids. The troubleshooting section covers various error codes and fault diagnoses, offering diagnostic procedures and potential solutions like component replacement. Exploded views and parts lists are provided for both indoor and outdoor units, facilitating component identification and ordering. Wiring diagrams and schematic diagrams are also included for electrical system analysis and repair.
Troubleshooting and error codes
| Error Code | Symptom | Procedure/Cause |
|---|---|---|
| E101, E102 | Communication error | Check the indoor/outdoor unit communication wiring. |
| E121 | Indoor Temperature Sensor Error | Check the indoor temperature sensor. |
| E122 | Indoor Heat Exchanger Temperature Sensor Error | Check the indoor heat exchanger temperature sensor. |
| E154 | Indoor Fan Motor Speed Detecting Error | Check the indoor fan motor and its wiring. |
| E186 | MPI Error | Check the MPI connection. |
| E221 | Outdoor temperature sensor error | Check the outdoor temperature sensor. |
| E237 | Coil temperature sensor error | Check the coil temperature sensor. |
| E251 | Discharge temperature sensor error | Check the discharge temperature sensor. |
| E416 | Discharge over temperature sensor error | Check the discharge over-temperature sensor. |
| E458 | Outdoor unit fan error | Check the outdoor unit fan motor. |
| E461 | Compressor start error | Check the compressor and its starting components. |
| E462 | I_Trip error | Check for overcurrent or trip conditions. |
| E464 | O.C.(over current)error | Check for overcurrent. |
| E467 | Comp Rotation error | Check compressor rotation. |
| E468 | Current sensor error | Check the current sensor. |
| E469 | DC-Link voltage sensor error | Check the DC-Link voltage sensor. |
| E471 | OTP error | Check the soldering status of IC701. |
| E472 | AC Line Zero Cross signal out error | Check power condition and noise. |
| E440/E441 | Operation condition secession error | Check outdoor unit temperature (Heat/Cool mode). |
| E556 | Capacity miss match error | Check Btu between indoor and outdoor units, and option codes. |
| E466 | DC-Link Voltage under/over error | Check power voltage, DC Link voltage detection, and capacitor. |
| (Not displayed) | No Power (completely dead) | Check input voltage, AC power link, DC regulator IC voltages. |
| (Not displayed) | Outdoor unit power supply error | Check input voltage, fuse, cable connections, reactor. |
| (Not displayed) | Up/Down Louver Motor Does Not Operate | Check input voltage, motor connection, micom, driver ICs. |
| (Not displayed) | Remote control is not receiving | Check connector assembly, voltage on main PCB. |