Growatt
Error 403
Temperature Sensor Fault
The inverter internal temperature sensor has returned an out-of-range or implausible reading.
Common causes
Temperature sensor failureExtreme ambient temperature causing sensor to read out of specWiring fault on internal sensor connector
What to check
STEP 1
Check ambient temperature at inverter location. A sensor reading extreme temperature when ambient is normal indicates sensor fault
STEP 2
Power cycle inverter. If fault clears and does not return, it may have been a transient
Escalate if
Fault returns after power cycle -- sensor replacement likely needed, escalate
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