A Non-Operational Microgt Inverter; Troubleshooting A Non-Operational Microgt Inverter - Magnum Energy MicroGT 500 Owner's Manual

A Non-operational MicroGT Inverter

There are two possible overall areas of trouble:
• The MicroGT inverter may be having problems, or
• The MicroGT inverter is working fi ne, but is having trouble
communicating with the MagWeb GT (if installed).
The items below refer to MicroGT inverter issues, not communication
issues (addressed in the MagWeb GT manual). A quick way to tell
whether the issue is the microinverter or a communication problem
with the MagWeb GT:
A. Diagnosing from the microinverter: A red light—either
blinking or solid on the microinverter—or no light at all. No light,
or a red light, means it is likely a microinverter problem.
B. Diagnosing from the MagWeb GT:
a) No-data-display: This is probably a communication issue,
not a microinverter problem.
b) Problems with erratic display: Data is displayed for some
period and then no data is displayed—most likely a
communication issue.
c) 0 watts, or 2 watts: Possibly a microinverter problem.
d) Erratic data display that is not coordinating with data displays
from other units: most likely a microinverter problem.

Troubleshooting a Non-operational MicroGT Inverter

1. Verify the utility voltage and frequency are within the ranges
shown in the Specifi cations section of this manual.
2. Check the connection to the utility grid. Verify utility power is
present at the inverter in question by removing AC, then DC
power. Never disconnect the DC wires while the microinverter
is producing power. Re-connect the DC module connectors and
watch the LED (x1 red followed by x3 short green LED fl ashes).
3. Check the AC branch circuit interconnection between all the
microinverters. In rare cases, the wire in the AC plug may
have worked loose. This will need to be reviewed by a qualifi ed
electrician. Verify that each inverter is energized by the utility
grid as described in the previous step.
4. Ensure all AC breakers are functioning properly and are closed.
5. Check the DC connections between the microinverter and the
PV module.
6. Verify that the PV module DC voltage is within the allowable
range shown in the Specifi cations section of this manual.
7. If the problem persists, please call Sensata Customer Support
at 425-353-8833.
WARNING: Do not attempt to repair the MicroGT 500
inverter. If troubleshooting methods fail, contact Sensata
Customer Service at 425-353-8833.
© 2016 Sensata Technologies
Troubleshooting
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