Delta RPI H3A Operation And Installation Manual page 44

Measurement, Error Message and Trouble Shooting
Message
E28: Slow Under
Voltage Range
E30: DC Volt
Over Rating
E34: Ground Fault
Possible cause
1. Actual utility voltage is under
the UVR setting
2. Incorrect country or Grid setting
3. Detection circuit malfunction
1. Actual Solar1 voltage is higher
than 550Vdc
2. Detection circuit malfunction
1. PV array insulation fault
2. Large PV array capacitance
between Plus to Ground or
Minus to Ground or both.
3. Detection circuit malfunction
ERROR
1. Check the utility voltage on the
inverter terminal
2. Check country & Grid setting
3. Check the detection circuit inside
the inverter
1. Modify the solar array string layout
and reduce the Voc below 550Vdc
2. Check the detection circuit inside
the inverter
1. Check the insulation of Solar inputs
2. Check the capacitance, dry PV
panel if necessary
3. Check the detection circuit inside
the inverter
44
Action