Error Code H9
Summary:
Pb error occurs 6 times within 120 minutes
Possible Causes:
- The speed of the DC motor is abnormal
- Outdoor DC motor fault
- Communication fault between DC Fan Module board and Main board.
Troubleshooting:
- If H9 occurs 6 times within 120 minutes. Refer to this link - Medium Foundation - Error Code Pb - Outdoor DC motor module protection – Trane Commercial HVAC Help Center
WARNING:
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