Error Code E9/P0Updated 21 hours ago
Introduction
The "E9” or “P0” error codes indicate an inverter drive error is present. The error code may display if the compressor or outdoor board is failing. The error codes are for Diamante Series systems.
Troubleshooting
- Ensure your outdoor refrigerant valves are backed out all the way counterclockwise to the open position by ohming Ω out the compressor with a multimeter.
- Remove the top and front panels of the unit to see the compressor.
- Pull out the sound insulation blanket wrapped around the compressor.
- Ohm Ω out 3 compressor lead pairs on the large white Molex plug between the compressor and the board. The plug usually has red, blue, and white (or black) wires, meaning you will test each pin against each other.
- Test each wire individually against the ground using the metal casing of the unit or a ground screw. The wires should not have any reading against the ground. The compressor should not be grounded. The multimeter should read “0” or “Open Line.”
- If the compressor works properly, replace the outdoor Inverter Power Module (IPM) board.
Note: Contact our Parts and Warranty department for any replacement components. Call 1-800-919-0150; Option #4.
Troubleshooting Diagram
Related Resources
- Click this link for a general parts diagram of the WYS wall mount. The diagram displays the compressor in the outdoor unit: WYS Wall Mount Parts Diagram
- See page 90 in this manual to learn how to open the outdoor condenser unit: Quantum Inverter Series Service & Troubleshooting Manual