Troubleshooting - Technaxx TX-270 User Manual

Status after the switch-on process
A fast green flashing LED indicates normal status and an active feed into the grid. If
the LED remains flashing red after 3minutes, this indicates an error with solar panel
voltage that is too low (below 22V) or a missing AC voltage.
The micro inverter can only start feeding (again) after the cause of the error has been
eliminated. The reason for this error could be a faulty solar panel connection / AC
connection or the connected grid exceeds / falls below the voltage / frequency range
of the micro inverter. If the LED shows no function or remains OFF, the most common
cause is that there is no connection to the solar panel or the solar panel voltage is far
below the start voltage.

Troubleshooting

Maintenance work and troubleshooting on the micro inverter may only be carried out
by qualified personnel. Modifications to the micro inverter are generally prohibited.
The micro inverter is potted, the electronics cannot be repaired. The HMS-800W-2T
micro inverter draws its supply voltage from the DC side. To restart the micro inverter,
the solar panels must be disconnected from the micro inverter. The start-up process
usually takes place within 2 minutes. For troubleshooting purposes, perform the
following steps in the order listed:
1. Check that all AC fuses are turned ON.
2. Check all connection cables for external damage.
3. Check all AC side connections for damage or connection errors.
4. Measure at the connection points. The applied mains voltage must not exceed or
fall below the AC voltage range of 180-275V.
5. Restart the micro inverter by disconnecting and reconnecting the DC power / solar
panels. A normal start-up process should be indicated by a green LED (see LED
status).
CAUTION!
Never disconnect the DC cables while the micro inverter is generating power.
6. Measure the voltage of the solar panel to the micro inverter with a suitable multi-
meter. The required starting voltage of the micro inverter is above DC22V.
7. Check the MC4 connectors of the micro inverter and solar panel(s). Damaged DC
connections must be replaced.
8. If necessary, check with your grid operator whether the grid frequency matches the
frequency range of the micro inverter.
CAUTION!
Do not attempt to repair the micro inverter.
If the above steps do not solve the problem, contact our support or an
electrician.
The AC connection on the micro inverter cannot be replaced/repaired. If the
cable has been damaged, the device should be disposed of.
Model: TX-270; Article No. 5117; 10/2023
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