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Note
：
If your SUN-12K/15K/18K-G03 string inverter has any of the
fault information shown in Table 10.1,and when you reset the
machine and still don’t solve the problom,please contact our
distributor and provide the below details:
1.Serial number of the inverter;
2.The distributor/dealer of the inverter(if available);
3.Grid generation date;
5.Your contact details.
4.The description of problem(include LCD’s error code and LED status
indicator lights);
DC busbar voltage is too low
1. Check PV input voltage and Ubus voltage via LCD or
monitoring platform;
2. Disconnect DC switch and AC switch, and reconnect DC
switch and AC switch 10min later to restart the inverter;
3. If the fault still exists, please contact us for help.
Error code
Description
Solutions
F56
F64
IGBT heat sink high
temperature
Heat sink temperature is too
high
1. Check whether the work environment temperature is too high;
2. Turn off the inverter for 10mins and restart;
3. Seek help from us, if can’t go back to normal state.
