Delta RPI Series - Error, Warning, and Fault Messages; Error Messages

ERROR
Message Possible cause Action
7 Error message and Trouble Shooting
AC Freq
High
(E01)
1. Actual utility frequency is over
the OFR setting
2. Incorrect country setting
3. Detection circuit malfunction
1. Check the utility frequency on the
inverter terminal
2. Check country setting
3. Check the detection circuit inside the
inverter
AC Freq
Low
(E02)
1. Actual utility frequency is under
the UFR setting
2. Incorrect country or Grid setting
3. Detection circuit malfunction
1. Check the utility frequency on the
inverter terminal
2. Check country & Grid setting
3. Check the detection circuit inside the
inverter
Grid Quality
(E07)
Non-linear load in Grid and near
to inverter
Grid connection of inverter need to be
far away from non-linear load if necessary
HW Con.
Fail
(E08)
1. Wrong connection in AC plug
2. Detection circuit malfunction
1. Check the AC connection, must accords
to manual
2. Check the detection circuit inside the
inverter
No Grid
(E09)
1. AC breaker is OFF
2. Disconnect in AC plug
1. Switch on AC breaker
2. Check the connection in AC plug and
make sure it connects to inverter
AC Volt
Low
(E10, E15,
E20)
1. Actual utility voltage is under
the UVR setting
2. Incorrect country or Grid setting
3. Wrong connections in AC plug
4. Detection circuit malfunction
1. Check the utility voltage connection
to the inverter terminal
2. Check country & Grid setting
3. Check the connection in AC plug
4. Check the detection circuit inside the
inverter
AC Volt
High
(E11, E13,
E16, E18,
E21, E23)
1. Actual utility voltage is over the
OVR setting
2. Utility voltage is over the Slow
OVR setting during operation
3. Incorrect country or Grid setting
4. Detection circuit malfunction
1. Check the utility voltage on the inverter
terminal
2. Check the utility voltage on the inverter
terminal
3. Check country & Grid setting
4. Check the detection circuit inside the
inverter
Solar1
High
(E30)
1. Actual Solar1 voltage is over
1000Vdc
2. Detection circuit malfunction
1. Modify the solar array setting, and
make the Voc less than 1000Vdc
2. Check the detection circuit inside the
inverter
EPO
(E25)
1. EPO is activated by user
2. Detection circuit malfunction
1. Release the EPO button
2. Check the detection circuit inside the
inverter
Solar2
High
(E31)
1. Actual Solar2 voltage is over
1000Vdc
2. Detection circuit malfunction
1. Modify the solar array setting, and
make the Voc less than 1000Vdc
2. Check the detection circuit inside the
inverter
57
Error message and Trouble Shooting