Error code

Mitsubishi Electric PAA code P1

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Meaning

Room temperature thermistor (TH1) 1. The unit is in three-minute resume prevention mode if short/ open of thermistor is detected. Abnormal if the unit does not reset normally after three minutes. (The unit returns to normal operation, if it has normally reset.) 2. Constantly detected during cooling, drying and heating operation Short: 90˚ C [194˚ F] or more Open: -40˚ C [-40˚ F] or less

Member details

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Possible causes

(1) Defective thermistor characteristics (2) Contact failure of connector (CN20) on the indoor controller board (Insert failure) (3) Breaking of wire or contact failure of thermistor wiring (4) Defective indoor controller board

Solution

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