TROUBLESHOOTING
70
H6, HH
Description
• H6 indicates a DC fan error.
• HH indicates that H6 protection has occurred 10 times in 2 hours. When HH error occurs, a manual system
restart is required before the system can resume operation. The cause of HH error should be addressed
promptly in order to avoid system damage.
• The unit shuts down.
• The error code is displayed on the main PCB and user interface.
Possible causes
• Fan communication or controller wiring is not connected properly.
• High wind speed.
• Fan motor blocked or failed.
• Abnormal power supply.
• Inverter module damaged.
• Main PCB is damaged.
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