aptos MAC 800R - Page 17

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2. If the alarm occurs frequently, check whether the grid frequency is
within the acceptable range. If no, contact the local power operator or
change the grid overfrequency protection limit via Aptos monitoring
system with the consent of the local power operator.
145
Grid underfrequency
1. If the alarm occurs accidentally, the grid frequency may be abnormal
temporarily. The microinverter can recover automatically after grid
frequency becomes normal.
2. If the alarm occurs frequently, check whether the grid frequency is
within the acceptable range. If not, contact the local power operator or
change the grid underfrequency protection limit via Aptos monitoring
system with the consent of the local power operator.
146
Rapid grid frequency
change rate
1. If the alarm occurs accidentally, the grid frequency may be abnormal
temporarily. The microinverter can recover automatically after grid
frequency becomes normal.
2. If the alarm occurs frequently, check whether the grid frequency
change rate is within the acceptable range. If no, contact the local power
operator or change the grid frequency change rate limit via Hoymiles
monitoring system with the consent of the local power operator.
147
Power grid outage
Please check whether there is a power grid outage.
148
Grid disconnection
Please check whether the AC switch or AC wiring is normal.
149
Island detected
1. If the alarm occurs accidentally, the grid voltage may be abnormal
temporarily. The microinverter can recover automatically after grid
voltage becomes normal.
2. If the alarms occur frequently on all the microinverters in your station,
contact the local power operator to check whether there is a grid island.
3. If the alarm still exists, contact your dealer or Aptos technical
support.
205
Input port1
overvoltage
1.Please make sure that the PV module open-circuit voltage is less than
or equal to the maximum input voltage.
2.If the PV module open-circuit voltage is within the normal range,
contact your dealer or Aptos technical support.
206
Input port2
overvoltage
1.Please make sure that the PV module open-circuit voltage is less than
or equal to the maximum input voltage.
2.If the PV module open-circuit voltage is within the normal range,
contact your dealer or Aptos technical support.
207
Input port1
undervoltage
1.Please make sure that the PV module open-circuit voltage is less than
or equal to the maximum input voltage.
2.If the PV module open-circuit voltage is within the normal range,
contact your dealer or Aptos technical support.
208
Input port2
undervoltage
1.Please make sure that the PV module open-circuit voltage is less than
or equal to the maximum input voltage.
2.If the PV module open-circuit voltage is within the normal range,
contact your dealer or Aptos technical support.
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