Delta RPI H3A

38
ERROR
Message Possible cause Action
E28: Slow
Under
Voltage
Range
1. Actual utility voltage is
under the UVR setting
2. Incorrect country or Grid
setting
3. Detection circuit
malfunction
1. Check the utility voltage on
the inverter terminal
2. Check country & Grid setting
3. Check the detection circuit
inside the inverter
E30: DC Volt
Over
Rating
1. Actual Solar1 voltage is
higher than
550Vdc
2. Detection circuit
malfunction
1. Modify the solar array string
layout and reduce the Voc
below
550Vdc
2. Check the detection circuit
inside the inverter
E34: Ground
Fault
1. PV array insulation fault
2. Large PV array
capacitance between
Plus to Ground or Minus
to Ground or both.
3. Detection circuit
malfunction
1. Check the insulation of Solar
inputs
2. Check the capacitance, dry
PV panel if necessary
3. Check the detection circuit
inside the inverter