Table 6-1A: Error Codes (Field Fault) and Messages
Message Description Action
6 Error Message and Trouble Shooting
AC Freq
High
(E01)
Grid frequency high
1. Check the utility frequency
2. Check Grid code setting
AC Freq
Low
(E02)
Grid frequency low
1. Check the utility frequency
2. Check Grid code & Grid setting
EPO
(E25)
EPO is operated by user Release the EPO button
Grid Quality
(E07)
Non-linear load in Grid and near
to inverter
If repeated occurrence, contact customer
service for technical support
AC phase
abnormal
(E08)
Wrong connection in AC plug
Check the AC connection in accordance
with the user manual
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)
1. Actual utility voltage is under
the UVR setting
2.
Incorrect Grid Code or Grid setting
3.
Wrong connections in AC plug
1. Check the utility voltage within the suitable
range
2. Check Grid code & Grid setting
3. Check the connection in AC plug
AC Volt
High
(E11)
1. Actual utility voltage is over
the OVR setting
2.
Incorrect Grid Code or Grid
setting
1. Check the utility voltage within the suitable
range
2. Check Grid code & Grid setting
3. Check the connection in AC plug
While Delta Electronics endeavors to build electronic products with high reliability
standards, there may still be situations where the inverter may not operate
properly. In this case, please follow the instructions in the “Troubleshooting Guide”
(Tables 6-1 ~ 6-4) to attempt to clear the fault. If the problem can’t be solved,
please contact customer service for technical support.
6.1 Error Codes (Field Fault)
Insulation
Fault
(E34)
Insulation problem of PV array
to ground
1. Check if panel enclosure ground conpletely
2. Check if inverter ground conpletely
3. Check if the DC breakers get wet
DC Voltage
High
(E30)
Input voltage is over 1000Vdc
Modify the solar array setting, and make the
Voc less than 1000Vdc
58
Error Message and Trouble Shooting
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