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Hello tienthienNOP

F07807 Unit: Short-circuit / ground fault detection

Detection of ground fault / short-circuit between phases (7)

Reaction: OFF2 (NONE)

Recognize: IMMEDIATELY

Cause: A short-circuit between phases or a failure of the ground system was detected at the output terminals

on the motor side.

Fault value (r0949, interpreting decimal):

1: Short circuit, UV phase.

2: Short circuit, UW phase.

3: Short circuit, VW phase.

4: Ground fault with overcurrent.

1yxxx: Ground fault system detection with U-phase current (y = number of pulses, xxxx =

component of the current in phase V per mile).

2yxxx: Ground fault system detection with phase V current (y = number of pulses, xxxx =

component of the U-phase current per mile).

note:

In addition, during the exchange, the line and motor cables are identified as a short circuit on the

the engine.

Failure testing of the grounding system only works when the engine is stopped.

Connection to an engine that is not de-energized or partially de-energized is

possibly detected as a failure of the grounding system.

Remedy: - Check the drive-motor connection for short-circuit between phases.

- Exclude the line and motor cables exchanged.

- Check ground fault.

For a ground fault, the following applies:

- do not enable the pulses when connecting to a rotating motor without the "Quick restart"

enabled (p1200).

- increase the de-energization time (p0347).

- Increase the pulse suppression delay time (p1228) to ensure a standstill.

- if necessary, disable monitoring (p1901).

 while  motor is stopped and the motor runs freely with pressure and after push the start button it shows fault code 7807  wat is the possible reason and how to correct the problem

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Split from Faults F7807 (G120 CU240E) in SINAMICS .