What you will see
- Short stops with code 13, often during unstable supply
- Fault appears around load-shedding switch-over times
Why it happens
Voltage spikes, dips and distortion when the grid switches back on, or when large loads nearby start and stop, can all trigger this protection.
Diagram
Inside or outside the allowed window
In range
Voltage, frequency and wave shape inside the limits. Inverter runs.
Out of range
A spike, dip or distortion, often when the grid returns. Inverter disconnects with code 13.
What you can check yourself
- Note the times and whether they line up with the grid returning after load-shedding
- Check if other appliances misbehave at the same time
What not to do
- Do not change grid protection settings in the app yourself
When to call us
- Record grid voltage and frequency at the inverter
- Check the grid code setting
- Check AC connections and any voltage protector
Unstable supply after load-shedding
Supply that comes back with spikes is common in parts of Faisalabad and Lahore. We can measure it at your inverter and tell you whether the cause is the grid or your installation.
Send us
fault history screenshots and your load-shedding times