Troubleshooting - Technaxx TX-274 User Manual

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 TX-242 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.
Unless otherwise specified, maintenance work must be carried out with the
equipment disconnected from the mains (mains switch open) and the solar
panels covered, or insulated.
Do not use rags or corrosive products for cleaning that could corrode parts
of the equipment or cause electrostatic charges.
Avoid temporary repairs. All repairs should be made only with original spare
parts.
Each micro inverter should be protected by a circuit breaker, but central
disconnect protection is not required unless specified by national standards,
or by the responsible network operator.
Model: TX-274; Article No. 5121; 11/2023
14