Gree PH fault code

What it means

DC link voltage rose above the safe operating window.

Safety: Safe isolation, then TREAT THE DC LINK AS LIVE. The electrolytic capacitors hold a lethal charge after the supply is off. Discharge through a resistor across the + and − terminals (Gree specifies approx. 100 Ω 20 W) and confirm with a meter on DC before touching the board. Never short the terminals with a screwdriver.

Source: Gree (Zhuhai) Service Manual, Bora Inverter R32 §9.1 Error Code List

UK models this code applies to

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PH on these comes from each model's own manual, which may not match the meaning above — tap yours to read it.

Now the harder half: proving what caused it

PH names a symptom, not a root cause. In the app, the same code opens a guided investigation: what to measure first, the expected values for your exact model, and an honest verdict — including “nothing in this machine is broken” when that's what the readings say.

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