Mitsubishi Electric · Air Conditioning
This error indicates a fault with the flow temperature sensor (TH1). It may be disconnected, short-circuited, or have an open circuit.
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Ensure the TH1 sensor is securely connected.
Check the wiring for TH1 for damage or loose connections.
Measure the resistance of the TH1 sensor.
Replace the TH1 sensor if it is faulty.