Sungrow SG33CX - Contact Information

9 Troubleshooting and Maintenance User Manual
74
Fault
code
Description
Check method
070
Fan alarm
1. Check whether the fans operate normally
and are blocked by sundries. If they are
blocked, clear the sundries.
2. If a fan does not operate normally, stop and
disconnect the inverter to replace the fan.
071
AC-side SPD
alarm
Check the SPD, and replace it if necessary.
072
DC-side SPD
alarm
076
Device anomaly
Wait for the inverter to return to normal.
Disconnect the AC and DC switches, and
reconnect the AC and DC switches 15
minutes later to restart the inverter.
If the fault still exists, contact Sungrow
Service.
078-081
PVx abnormal
1. Check if the xth PV string needs to be
connected.
If not, ignore the alarm; and
If so, check the connection status and make
sure it is connected reliably.
2. Check if the xth DC fuse is damaged. If so,
replace the fuse.
3.If the fault is not caused by the foregoing
reasons and still exists, contact Sungrow
Service.
*The code 078 to code 081 are
corresponding to PV 1 to PV 4 respectively.
087
Electric arc
detection module
abnormal
The inverter can operate normally.
1. Check whether the related cable
connection and terminals are abnormal, and
check whether the ambient environment is
abnormal. If so, remove the corresponding
abnormity.
2. If the fault is not caused by the foregoing
reasons and still exists, contact Sungrow
Service.