ERRORMESSAGES
Code Error Description Fix / Comment
E12 Low pressure protection Monitor operating pressure and check
pressure switch safety circuit
E171 Freeze protection Return water temperature is low.
E19 Primary(outdoors) freeze
protection
Ambient temperature is low.
E29 Secondary (outdoors) freeze
protection
Ambient temperature is low.
F031 DC fan motor 1 fault Check for poor wire connection to fan motor.
Check for locked rotor state.
F031 DC fan motor 2 fault Check for poor wire connection to fan motor.
Check for locked rotor state.
11.2 Troubleshooting error messages
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