© 2021 Hoymiles Power Electronics Inc. All rights reserved.
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Single-phase Microinverter User Manual
6.2 Status LED Indicator
The LED flashes five times at startup. All green flashes (1s gap) indicate normal startup.
Status LED
(1) Startup Process
•
Five green flashes (0.3s gap): Startup success
•
Five red flashes (0.3s gap): Startup failure
(2) Running Process
•
Fast green flashing (1s gap): Producing power.
•
Slow green flashing (2s gap): Producing power, but one input is abnormal.
•
Slow green flashing (4s gap): Producing power, but there is no communication with DTU.
•
Red flashing (1s gap): Not producing power, AC grid fault (voltage or frequency out of range).
•
Red flashing (0.5s gap): Non-grid abnormality fault.
(3) Other Status
•
Alternating red and green flashing: Firmware is corrupted.
*Note: All faults are reported to the DTU, refer to the local DTU app or S-Miles Cloud (Hoymiles Monitoring
Platform) for more information.
6.3 Insulation Resistance Detection
There is a resistance sensor in the microinverter to measure the resistance between the outputs of PV
module and the ground. If there is a problem with PV module insulation, DC wiring or connectors of the
module and so on, the resistance between the outputs of the module and the ground may decrease. If this
resistance drops below a preset threshold, the microinverter will stop producing power and report this
ground fault. This fault will persist until it is cleared on the S-Miles Cloud (Hoymiles Monitoring Platform). This
fault will persist until the microinverter is rebooted.
Please note that this fault cannot be cleared if the cause of the failure is still present. If the fault persists,
contact your installer or Hoymiles for possible replacement.
