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.
Table 6-1A: Error Codes (Field Fault) & Messages
Message Description Action
AC Freq High
(E01)
Grid frequency high
AC Freq Low
(E02)
Island
(E03,E04,E05)
AC phase jump
(E06)
Grid frequency low
1. Check the utility frequency
2. Check Grid code & Grid setting
Islanding is detected Check Grid breaker
Phase jump of Grid voltage
If repeated occurrence, contact customer
service for technical support
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. Actual utility voltage is under the
UVR setting
2. Incorrect Grid Code or Grid setting
3. Wrong connections in AC plug
1. Actual utility voltage is over the
OVR setting
2. Incorrect Grid Code or Grid setting
1. Switch on AC breaker
2. Check the connection in AC plug and
make sure it connects to inverter
AC Volt Low
(E10)
AC Volt High
(E11)
1. Check the utility voltage within the suitable
range
2. Check Grid code & Grid setting
3. Check the connection in AC plug
6.1 Error Codes (Field Fault)
EPO
(E25)
EPO is operated by user Release the EPO button
DC Voltage
High
(E30)
Input voltage is over 1000Vdc
Modify the solar array setting, and make the
Voc less than 1000Vdc
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
Remote OFF
(E36)
Remote OFF by external
communication
Check if remote OFF function is active
73
Error Message and Trouble Shooting
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