Error code

Mitsubishi Electric PQHY code 5109

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Meaning

Outlet water temperature (TH9): (the second detection) after the first restart of the heat source unit, the heat source unit stops, turns to anti-restart mode for 3 minutes, and restarts in 3 | Outlet water temperature (TH9): heat source unit stops, turns to anti-restart mode for 3 minutes

Member details

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Possible causes

(6) Thermistor input circuit failure on the main board (3) Torn wire coating

Solution

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