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6 Error Message and Trouble Shooting
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)
Message
AC Freq
High
Grid frequency high
(E01)
AC Freq
Low
Grid frequency low
(E02)
Grid Quality
Non-linear load in Grid and near
(E07)
to inverter
AC phase
abnormal
Wrong connection in AC plug
(E08)
No Grid
1. AC breaker is OFF
(E09)
2. Disconnect in AC plug
1. Actual utility voltage is under
AC Volt
the UVR setting
Low
2. Incorrect Grid Code or Grid setting
(E10)
3. Wrong connections in AC plug
1. Actual utility voltage is over
AC Volt
the OVR setting
High
2. Incorrect Grid Code or Grid
(E11)
setting
EPO
EPO is operated by user
(E25)
DC Voltage
High
Input voltage is over 1000Vdc
(E30)
Insulation
Insulation problem of PV array
Fault
to ground
(E34)
Table 6-1A: Error Codes (Field Fault) and Messages
Description
Error Message and Trouble Shooting
1. Check the utility frequency
2. Check Grid code setting
1. Check the utility frequency
2. Check Grid code & Grid setting
If repeated occurrence, contact customer
service for technical support
Check the AC connection in accordance
with the user manual
1. Switch on AC breaker
2. Check the connection in AC plug and
make sure it connects to inverter
1. Check the utility voltage within the suitable
range
2. Check Grid code & Grid setting
3. Check the connection 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
Release the EPO button
Modify the solar array setting, and make the
Voc less than 1000Vdc
1. Check if panel enclosure ground conpletely
2. Check if inverter ground conpletely
3. Check if the DC breakers get wet
55
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