Question about Mitsubishi MSZ-A15NA Split System Air Conditioner
There could be few reasons for this error :-
1. Refrigerant leak or shortage of refrigerant.
2.Indoor unit heat exchanger sensor [ThiR] is defective (short circuit).
3. Indoor unit PCB defective (defective sensor input circuit).
4. Indoor unit PCB defective (defective sensor input circuit).
A tech is recommended for the exact diagnosis of this error.
Posted on Aug 20, 2010
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Posted on Jan 02, 2017
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