Internal Circuit Fault

What does E.13 mean?

This fault indicates a general malfunction within the inverter's internal circuitry. The specific cause is not detailed in the manual, suggesting a fundamental hardware problem that cannot be resolved through basic troubleshooting. Continued attempts to operate with this fault may lead to further damage.

• Malfunction of the main control board due to component failure (e.g., capacitor, IC).
• Damage to the power circuit (e.g., IGBT module, rectifier) causing internal short or open circuit.
• Overheating of internal components due to blocked cooling fins or fan failure, leading to thermal stress.
• Corrupted firmware or memory error within the inverter's processor.
• Transient overvoltage or severe power surge causing damage to sensitive internal electronics.

Click steps to track your progress.

1. 1

   Power down the inverter, wait 10 minutes for capacitor discharge, then visually inspect the main control board for burnt components, bulging capacitors, or signs of liquid damage.

2. 2

   Verify the operation of the cooling fan by observing rotation or measuring fan voltage at its terminals (e.g., 24VDC).

3. 3

   Measure the resistance across the DC bus terminals (+/P and -/N) when power is off; an abnormally low reading may indicate an IGBT short.

4. 4

   Check for proper grounding of the inverter chassis (ground resistance < 1 Ohm) to minimize static discharge or surge effects.

5. 5

   Record all parameter settings (e.g., using a parameter copy function if available) before considering a replacement inverter.