E3, E7, or E8 Error CodesUpdated a day ago

Introduction

The "E3", "E7", "E8", "EH", "En", or "Ey" error codes indicate different sensor failures. 

• The "E3" error code indicates an outdoor unit coil temperature sensor failure. 
• The "E7" error code indicates an ambient temperature sensor failure. 
• The "E8" error code indicates an discharge temperature sensor failure. 
• The "EH" error code indicates a suction temperature sensor failure. 
• The "En" error code indicates a gas pipe temperature sensor failure. 
• The "Ey" error code indicates a liquid pipe temperature sensor failure. 

This article is for Diamante and Quantum series systems. 

Troubleshooting

If any of the sensors experience a short circuit or an open circuit fault, the system will display the error codes. After the error codes display, the indoor and outdoor units turn off. When the sensors recover, the unit reverts to standby. The unit can then be turned on directly. 

Troubleshooting Diagram