Brand: SAMSUNG
Category: Air Conditioner
Document Type: Parts/Service
Language: EN
Parts/Service for AC071MN4PKH
Uploaded: Nov. 21, 2025, 8:14 p.m.
Manual Publish Date: 2016-12-01
Warranty Information
Refer to the service manual for detailed warranty information and applicable laws.
- Use standard parts when replacing electric components, ensuring correct model name, rated voltage, and current.
- Ensure harness connections are firm and solid to prevent noise or malfunction.
- Lay equipment on soft cloth when assembling/disassembling to avoid scratches.
- Remove dust and dirt from housing, wiring blocks, and service parts to prevent fire hazards.
- Fasten valve caps securely using adjustable wrenches.
- Verify component assembly status after repair.
- Be aware of static electricity risks when working with powered PCBs; use insulation gloves.
- Maintain a 2-meter distance from other electronic products during installation to prevent interference.
- Do not allow end-users to perform repairs to avoid electric shock or fire hazards.
- Do not pull power cords or touch plugs with wet hands.
- Replace damaged power lines or plugs immediately.
- Avoid bending power cables excessively or placing heavy objects on them.
- Do not use multiple electric outlets.
- Connect the ground terminal when necessary, especially in moist environments.
- Unplug the power cable or turn off auxiliary power before electrical work.
- Instruct users to remove batteries from remote controllers when not in use for extended periods.
- Ensure pipes have no leaks during installation and stop the compressor before removing connecting pipes for pump-down work.
Troubleshooting and error codes
| Symptom | Troubleshooting Steps | Page |
| Outdoor unit power is not ON (Initial Diagnosis: 1-phase products) | Check power supply, circuit breaker, and internal wiring connections. | 4-25 |
| Indoor temperature sensor error (E121) | Check sensor connection and resistance. | 4-26 |
| Indoor heat exchanger temperature sensor error (E122) | Check sensor connection and resistance. | 4-27 |
| Indoor Fan error (E154) | Check fan motor connection, capacitor, and control board. | 4-28 |
| Communication error after finishing Tracking (E202) | Check communication wiring and connections between indoor and outdoor units. | 4-29 |
| Indoor unit float sensor error | Check float sensor wiring and if the drain pan is full. | 4-30 |
| EEPROM circuit failure (E162) | Replace the EEPROM or main PCB. | 4-31 |
| Whistling noise from the indoor unit in low wind mode | Check fan blade for obstructions or damage. | 4-32 |
| Outdoor unit power is not ON (Initial Diagnosis: 3-phase products) | Check power supply, circuit breaker, and phase sequence. | 4-33 |
| Indoor/outdoor communication error (1min.) (Error Code: E202) | Check communication wiring and connections between indoor and outdoor units. | 4-37 |
| Communication error between outdoor unit INV MAIN MICOM (1 min.) (Error Code: E203) | Check communication wiring and connections between outdoor unit MICOMs. | 4-39 |
| Outdoor sensor error (E221, E231, E251, E320) | Check sensor connections and resistance. | 4-40 |
| Reverse phase / Loss phase detection (3-phase outdoor unit) (Error Code: E425) | Check power supply phase sequence and connections. | 4-41 |
| Compressor down due to freezing control (Error Code: E403) | Check refrigerant charge, airflow, and sensor readings. | 4-42 |
| Outdoor unit Fan error (Error Code: E458, E475) | Check fan motor connection, capacitor, and control board. | 4-43 |
| Compressor starting error/rotation error (Error Code: E461, E467) | Check compressor, capacitor, and control board. | 4-44 |
| Full current error/PFC over-current error (Error Code: E462, E484) | Check power supply, compressor, and control board. | 4-46 |
| IPM IPM (Over Current) error (Error Code: E464) | Check IPM module, compressor, and control board. | 4-47 |
| DC LINK over-current/low-voltage error (Error Code: E466) | Check DC link voltage and current, power supply, and control board. | 4-47 |
| H/W DC_Link Over Voltage Error (Error Code: E483) | Check DC link voltage, power supply, and control board. | 4-47 |
| AC Input Voltage Sensor Error (Error Code: E488) | Check AC input voltage sensor and power supply. | 4-50 |
| Gas leakage error (Error Code: E554) | Check for refrigerant leaks and perform leak test. | 4-51 |
| Pipe blockage error(Error Code: E422) | Check refrigerant lines for blockages. | 4-53 |
| Smart install mode was not carried out (Error Code: E508) | Ensure Smart Install mode is completed correctly. | 4-54 |
| Others | Refer to specific error codes or consult manual for further details. | 4-56 |