What you will see
- Power drops on hot afternoons
- FanFault
- AcTerminalOTP
Why it happens
Direct sun, poor airflow, dusty cooling fins or a loose AC terminal heating up.
Diagram
Heat makes the inverter cut back
Shaded, open air
InverterCool
→OutputFull
Direct sun or closed space
InverterOverTempFault
→OutputReduced
What you can check yourself
- Check for direct sun and space around the inverter
- Wipe dust off the cooling fins with a soft dry cloth when safe, as Fronus advises
What not to do
- Do not open the AC terminal cover
When to call us
- Tighten or replace AC terminals for AcTerminalOTP
- Replace the fan
Punjab summers
We service Fronus inverters through Faisalabad and Lahore summers.
Send us
photo of location and the alarm