Error code reference

Haier Air Conditioner Error Code E9

Overheating discharge pipe - possible short/excessive gas, high/low voltage, jammed capillary tube, faulty thermistor or control board, high ambient temperature (Resumable alarm)

SourceHaier HSU-22H03/R2 - Full Service Manual: Split AC Unitp. 37

Haier codes Haier air conditioner codes

Diagnostic procedure

The full E9 procedure

Step 1 is visible so you can confirm you are on the right page. The remaining steps, the ones that tell you whether to actually replace a part, unlock with any pass.

MyPros+ · DiagnosticsStep 1 preview

First diagnostic step

Check refrigerant charge, supply voltage (187-242V range), capillary tube, thermistor, and control board

SourceHaier HSU-22H03/R2 - Full Service Manual: Split AC Unitp. 37

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More steps, wiring diagram references, and verified part numbers

Includes expected resistance and voltage values, connector pinouts, and supersession notes for replacement parts.

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Where this code is documented

4 manuals in the MyPros+ library document this code for Haier air conditioner.

Models covered by the manuals that document this code

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The full E9 procedure

Where this code is documented

Models covered by the manuals that document this code

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