User Manual
9 Troubleshooting and Maintenance
57
Fault
Code
Description
Troubleshooting
049
Phase-S current
sampling channel fault.
Sungrow Service Dept..
050
Phase-T current
sampling channel fault.
051
Hardware Overvoltage/
Overcurrent protection
1. Wait a moment for inverter recovery.
2. If the fault occurs repeatedly, contact
Sungrow Service Dept..
070
Fans are defective.
Disconnect inverter and remove the broken
fan.
071
Fault with AC SPD
It is necessary to replace the SPD. Contact
Sungrow Service Dept..
072
Fault with DC SPD
073
Fuse has blown out
Disconnect the inverter and replace the fuses.
Contact Sungrow Service Dept..
074
Communication fault of
LCD
A fault has occurred in the internal
communication of the inverter. However, the
inverter continues feeding into the grid.
Contact Sungrow Service Dept..
075
Solar irradiation is not
sufficient for inverter
operation.
1. Wait for higher irradiation.
2. If this recurs at medium irradiation, check
the PV system design and correct the
connection of PV inputs.
076
PV overload
Check the PV system design and correct the
connection of PV inputs.
078
PV1 power abnormal
warning
Check the PV1 input for disconnection or
looseness.
If the warning fault still exists, please contact
Sungrow
079
PV2 power abnormal
warning
Check the PV2 input for disconnection or
looseness.
If the warning fault still exists, please contact
Sungrow
080
PV3 power abnormal
warning
Check the PV3 input for disconnection or
looseness.
If the warning fault still exists, please contact
Sungrow
532-547 Reverse polarity warning
of PVS connection.
1. Check the polarity of the PV inputs, if the
polarity is reverse, please reconnect PV strings.
2. If the fault still exists, please contact with
SUNGROW.
