Goodwe MS Series User Manual page 36

09 Maintenance
Type of fault
Isolation
Failure
Ground I
Failure
System
failure
Vac Failure
Fac Failure
Utility Loss
Troubleshooting
1. Turn off DC switch first, then take off DC connector and AC
connector. Check the impedance between PV (+) & PV (-) to earth.
2. If impedance is less than 100KΩ, please check the insulation of
PV string wiring to the earth.
3. If impedance is larger than 100KΩ, please contact local service
office.
4. Take off AC connector, measure the impedance between neutral
wire and PE line. If it is larger than 10KΩ, please check AC wiring.
Inverters for the Australian and New Zealand markets can also be
alerted in the following ways in the event of insulation impedance
failure:
1. The inverter is equipped with the buzzer: the buzzer sounds
continuously for 1 minute in case of failure; If the fault is not
resolved, the buzzer sounds every 30 minutes.
2. Add the inverter to the monitoring platform, and set the alarm
reminder, the alarm information can be sent to the customer by
emails.
1. Turn off DC switch first, then take off DC connector and AC
connector, check the insulation of PV string wiring to earth.
2. Restart the DC switch.
3. If the problem still exists, please call the local service office.
1. Turn off DC switch first, then take off the AC connector and DC
connector, measure the voltage between live line and neutral
wire in connector. Check if it conforms to the grid-connected
specification of inverter.
2. If not, please check grid wiring.
3. If conforming to the specification, please connect AC connector,
restart DC switch.The inverter will connect grid automatically. If the
probiem still exists, please call the local service office.
1.Turn off DC switch first, then take off the AC connector and DC
connector, check if the AC line and PE line are right.
2.If the problem still exists, please call the local service office.
1. Turn off DC switch first, then take off the AC connector and DC
connector, measure the voltage between live line and neutral
wire in connector. Check if it conforms to the grid-connected
specification of inverter.
2. If not, please check if the distribution switch is connected and
the grid is normal.
3. If conforming to the specification, reconnect AC connector
and DC connector. If the problem still exists, please call the local
service office.
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User Manual V1.1-2022-11-15