Gree U-Match 5 Series - 4. Maintenance; 4.1 System Diagram; 4.2 Connection Pipe Vacuum Pumping

GREE U-Match 5 SERIES UNIT SERVICE MANUAL
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Troubleshooting：
3.4.39 “EL” Emergency Stop (Fire Alarm)
If fire alarm terminal is enabled after the IDU mainboard connects to function expansion panel, error EL will
be reported.