Brand: PIONEER
Category: Air Conditioner
Document Type: Installation Guide
Language: EN
Available Languages: EN , ES
Installation Guide for YN-M Series
Uploaded: Nov. 21, 2025, 8:03 p.m.
Manual Publish Date: 2017-12-12
Warranty Information
Consult sales agency or manufacturer for details regarding design and specifications.
Basic Operation Overview
This manual guides you through the installation of the PIONEER YN-M Series Multi-Split System Air Conditioner/Heat Pump. Key steps include:
- Outdoor Unit Installation: Selecting a suitable location, ensuring proper clearances, and securing the unit.
- Refrigerant Piping Connection: Cutting, flaring, and connecting refrigerant pipes between indoor and outdoor units, ensuring proper insulation.
- Wiring: Connecting the power and signal cables according to the provided diagrams, ensuring all connections are secure and compliant with regulations.
- Air Evacuation: Removing air and moisture from the refrigerant system using a vacuum pump.
- Test Run: Verifying proper operation of both indoor and outdoor units after installation.
- Automatic Wiring/Piping Correction: Utilizing a function to automatically correct errors in wiring or piping.
Always refer to the safety precautions and detailed instructions within the manual.
Troubleshooting and error codes
| Display | LED STATUS | New Indoor Error |
|---|---|---|
| E0 | Outdoor unit EEPROM parameter error | F4 |
| E2 | Communication malfunction between indoor and outdoor units | E1 |
| E3 | Communication malfunction between IPM board and outdoor main control board | F2/F1/F3/F6 |
| E4 | Outdoor temperature sensor (coil sensor T3, ambient sensor T4, Compressor discharge sensor T5、indoor coil outlet pipe sensor T2B) malfunction | P1 |
| E5 | Over-voltage or under-voltage protection | --- |
| E6 | PFC module protection | --- |
| E8 | Outdoor fan speed has been out of control | F5 |
| F1 | No. A Indoor unit coil outlet temp. sensor malfunction | --- |
| F2 | No. B Indoor unit coil outlet temp. sensor malfunction | --- |
| F3 | No. C Indoor unit coil outlet temp. sensor malfunction | --- |
| F4 | No. D Indoor unit coil outlet temp. sensor malfunction | --- |
| F5 | No. E Indoor unit coil outlet temp. sensor malfunction | --- |
| F6 | No. F Indoor unit coil outlet temp. sensor malfunction | --- |
| P0 | Compressor top high temperature protection (OLP) | P0 |
| P1 | High pressure protection | P2 |
| P2 | Low pressure protection | P2 |
| P3 | Current overload protection | P0 |
| P4 | Temperature protection of compressor discharge | F0 |
| P5 | Condenser high temperature protection | P2 |
| P6 | Inverter module (IPM) malfunction | PO |