code 30 is a pump motor fault
possible causes:
- Faulty pump motor circuit
- faulty line contactor
- faulty diode
- faulty pump motor wiring
- faulty head capacitor
- faulty T1P IGBT
- faulty current sensor CS
- faulty wiring in other parts
- faulty drive board
these are all the components that can effect this code.
you have already ruled out some of them , check the others listed here.
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