9 Troubleshooting and Maintenance
User Manual
48
Fault
Code
Description
Troubleshooting
106
The inverter is not
grounded.
Neither the PE terminal
on the AC connection
block nor the second PE
terminal
on
the
enclosure is reliably
connected.
Check whether there is a reliable inverter
grounding line, if there is access to the
ground, and the fault still exists, please
contact Sungrow Service Dept.
200
The bus voltage is high.
1. Wait for inverter recovery after bus voltage
lower.
2. If the fault occurs repeatedly, contact
Sungrow Service Dept.
201
The bus voltage is too
low.
1. Wait a moment for inverter recovery.
2. If the fault occurs repeatedly, contact
Sungrow Service Dept.
202
PV current exceeds the
set
value
of
the
hardware.
If the fault occurs repeatedly, contact
Sungrow Service Dept.
203
DC voltage sampling
anomaly.
Check the functionality of the PV connection
terminals.
205
AC
output
relay
abnormal
1. Wait a moment for inverter recovery.
2. If the fault occurs repeatedly, contact
Sungrow Service Dept.
306
Input and output power
mismatching fault
If the fault occurs repeatedly, contact
Sungrow Service Dept.
315
PV1 current sampling
channel fault
Channel sampling anomaly.
Contact Sungrow Service Dept.
316
PV2 current sampling
channel fault
409
Ambient temperature
sensor fault and radiator
temperature sensor fault
If the fault occurs repeatedly, contact
Sungrow Service Dept.
503-
506
Temperature
sensor
warnings
