Brand: PIONEER
Category: Air Conditioner
Document Type: Parts/Service
Language: EN
Parts/Service for WYD-GF16-S1-1714
Uploaded: Nov. 21, 2025, 8:23 p.m.
The manual provides troubleshooting and repair guidelines for PIONEER WD Indoor / YN Outdoor Units Series DC Inverter Air Conditioners. It details electrical control systems, wiring diagrams, current flow, and computer control function flow charts. The core of the manual is dedicated to a comprehensive list of fault codes and protection codes, with detailed explanations of their causes, symptoms, and suggested solutions. It also covers other general faults and provides appendices with PCB component identification and temperature sensor resistance charts. Cautions on replacement of PCB boards and inverter modules are also included.
Troubleshooting and error codes
| Fault Code | Fault Type | Function Indicator (flash) | Digital LED display |
| E0 | Indoor/outdoor communication fault | RUN & TIMER: Blink | E0 |
| EC | outdoor communication fault | RUN & TIMER: Blink | EC |
| E1 | Room temperature sensor (IRT) | RUN-1/8 sec. | E1 |
| E2 | Indoor pipe (coil) temperature sensor (IPT) | RUN-2/8 sec. | E2 |
| E3 | Outdoor pipe (coil) temperature sensor (OPT) | RUN-3/8 sec. | E3 |
| E4 | System abnormal | RUN-4/8 sec. | E4 |
| E5 | Model configuration wrong | RUN-5/8 sec. | E5 |
| E6 | Indoor fan motor fault | RUN-6/8 sec. | E6 |
| E7 | Outdoor temperature sensor | RUN-7/8 sec. | E7 |
| E8 | Exhaust temperature sensor | RUN-8/8 sec. | E8 |
| E9 | Intelligent power module of drive and module fault | RUN-9/8 sec. | E9 |
| EF | Outdoor fan motor fault (DC Motor) | RUN-10/8 sec. | EF |
| EA | Current sensor fault | RUN-11/8 sec. | EA |
| EE | EEPROM fault | RUN-12/8 sec. | EE |
| EP | Temperature switch fault (on top of the compressor) | RUN-13/8 sec. | EP |
| EU | Voltage sensor fault | RUN-14/8 sec. | EU |
| EH | Intake temperature sensor | RUN-15/8 sec. | EH |
| Protection Code | Protection Type | Function Indicator (flash) | Digital LED display |
| P1 | Overvoltage / undervoltage protection | RUN: Blink; TIMER: 1 blink /8 sec | P1 |
| P2 | Overcurrent protection | RUN: Blink; TIMER: 2 blink /8 sec | P2 |
| P4 | Exhaust overtemperature protection | RUN: Blink; TIMER: 4 blink /8 sec | P4 |
| P5 | Subcooling protection under cooling mode | RUN: Bright; TIMER: 5 blink /8 sec | P5 |
| P6 | Overheating protection under cooling mode | RUN: Bright; TIMER: 6 blink /8 sec | P6 |
| P7 | Overheating protection under heating mode | RUN: Bright; TIMER: 7 blink /8 sec | P7 |
| P8 | Outdoor overtemperature / undertemperature protection | RUN: Bright; TIMER: 8 blink /8 sec | P8 |
| P9 | Drive protection (software control) | RUN: Blink; TIMER: 9 blink /8 sec | P9 |
| P0 | Module protection (hardware control) | RUN: Blink; TIMER: 10 blink /8 sec | P0 |