System malfunction

What does F-19 mean?

An internal system malfunction has occurred within the inverter electronics, potentially influenced by electromagnetic compatibility (EMC) issues. This fault causes an immediate switch-off and inhibits operation, signifying a critical internal hardware or software problem that requires expert attention.

• Analog-to-digital converter (ADC) error on an internal sensor input (e.g., current, voltage, temperature), leading to incorrect readings for the CPU.
• Failure in an internal communication link, such as SPI or I2C bus, between the main CPU and a subordinate processor or sensor.
• Excessive ripple or noise on the internal power rails supplying sensitive analog circuits.
• Timing violation in the inverter's real-time operating system, potentially due to clock drift or high interrupt load.
• Accumulation of electrostatic discharge (ESD) within the control environment, causing transient disruptions to internal logic.

Click steps to track your progress.

1. 1

   Monitor internal diagnostic parameters related to measured values (e.g., motor current P0-30, DC link voltage P0-95) for erratic behavior prior to the fault.

2. 2

   Cycle power to the inverter and allow for a full reset sequence to re-initialize internal communication buses.

3. 3

   Verify that the inverter's mounting to the cabinet backplate provides a low-impedance ground path as per installation guidelines (e.g., large copper braid).

4. 4

   Check for any external sources of high-frequency noise near the inverter that could be coupling into its sensitive electronics (e.g., switching power supplies).

5. 5

   If possible, update the inverter's firmware to the latest version to address potential known software bugs related to timing or communication.