SINAMICS error codes: F30001, F30002, F07011 meaning and correction

The SINAMICS drive family (G120, S120, G130, S150) uses a uniform error code system: the F-prefix codes cause an immediate shutdown (trip), the A-prefixes warnings that do not necessarily stop the drive. The basic principle of troubleshooting is always the same: the error code is the starting point of diagnostics – not the end point.

What is F and A error code in SINAMICS?

SINAMICS error codes consist of five digits (e.g. F30001), where the first one or two digits identify the error package: the 30xxx series for power unit (PM) faults, the 07xxx series for motor and load protection, the 01xxx and 09xxx series for communication applies.

The detailed diagnostic value of the error code is r0949 can be read from the parameter – this shows which phase or component was affected. The fault buffer is r0947 is stored in the parameter, where the timestamp (r0948) and the error number (P0952) can also be queried. It is worth recording these values before restarting the drive - this is key information for service.

F30001 – Overcurrent in the power unit

What does it mean? F30001 indicates that the phase current measured at the output of the power module (PM) has exceeded the hardware protection threshold and the drive has immediately shut down to protect the IGBT modules. This is the most severe current protection alarm – unlike F07011, which is based on a software threshold, F30001 is triggered at the hardware level.

A r0949 By reading the parameter, the affected phase can be obtained: 1 = U phase, 2 = V phase, 3 = W phase, 4 = DC-link. This immediately narrows down the area to be tested.

Typical causes and inspection sequence

1. Motor cable and motor inspection – Before setting any parameters, disconnect the motor cable from the drive output terminals (U, V, W) and measure the insulation resistance between phase-phase and phase-ground. In a healthy motor, both are >1 MΩ. Cable fault (burnt or sheared conductor) is the most common cause.
2. Engine load – A mechanical obstruction (stuck gear, pump trap, seized bearing) causes a sudden surge in current. Check the freedom of rotation of the driven machine by hand before restarting the drive.
3. Parameter mismatch – The p0307 (motor rated power) and r0206 (rated drive power) must be in accordance with the motor data. In case of incorrect motor data, the controller will underestimate the current limit. The p1120 / p1121 (ramp up/down time) values are also worth checking – too short a ramp causes a starting overcurrent.
4. IGBT module failure – If the above points are OK, but F30001 is displayed without load, an internal IGBT failure in the power module is likely. This requires component-level repair.

F30002 – DC link overvoltage

What does it mean? The DC link voltage has exceeded the hardware shutdown threshold. On a 400 V network, this is typically around ~820 V. The cause is almost always the braking energy recovery – which the drive cannot handle.

Typical reasons

• Missing or inadequate brake resistor – If the load has high inertia (flywheel, centrifuge, crane) and the run-up time (p1121) is too short, the motor feeds energy back into the DC link as a generator. Solution: increase the braking resistor or increase the deceleration time.
• Aging of DC-link capacitors – As the capacitance of electrolytic capacitors decreases, the ripple voltage increases and the peaks reach the shutdown threshold more easily. It can be diagnosed with an ESR meter; if the measured value is 100+ milliohms, replacement is required.
• Power surges – Mains overvoltage resulting from switching malfunctions can also enter through the DC link. This is prevented by using a mains filter and surge arrester.
• Vdc regulator is off or incorrectly set – The p1240 The Vdc controller must be enabled with parameter , which automatically extends the run-down time if the DC voltage increases.

F07011 – Motor overload

What does it mean? The motor protection model (I²t calculation) indicates that the motor will enter a thermal overload condition if operation continues. This is a software protection function – the threshold is p0604 and p0626–p0628 can be set with parameters.

Inspection sequence

1. Load profile analysis – Do the starting, peak and continuous current requirements match the motor and drive ratings? In conveyor and pump applications, the actual load often differs from the design.
2. Checking engine cooling – Clogged filter, stopped fan, dirty heat sink? The heat output from the motor cannot be dissipated, the I²t model saturates earlier. In many cases, cleaning the cooling surfaces will eliminate the error by itself.
3. Engine data clarification – The p0304–p0311 Do the values set for nominal parameters exactly match the motor data plate? In case of a discrepancy, the protection software calculates incorrectly and generates false alarms.
4. Run engine identification – If the motor parameters are uncertain, the built-in motor identification routine (p1910 = 1) refines the internal model data and reduces the number of false positives.

Prevention: when can downtime be avoided?

The vast majority of faults in SINAMICS drives can be prevented with regular maintenance. The three most important preventive steps are:

• Filter cleaning and fan inspection at least once a year – Overheating shutdowns are almost exclusively caused by neglected cooling. Cleaning the heat sink and internal fan is a 10-minute job, but it can delay the next failure for years.
• Lifetime monitoring of DC-link capacitors – The lifespan of electrolytic capacitors depends on temperature and load; it is worth performing an ESR measurement after 7–10 years of operation. Proactive replacement costs a fraction of the cost of an unexpected shutdown.
• Regularly save parameter sets – Saving the current parameters to an SD card or TIA Portal project reduces the recovery time after a failure from hours to minutes.

When is component-level repair necessary?

If physical and configuration causes can be ruled out based on the above checklists, but the error code returns, component failure of the drive power unit or control board is likely. This typically means IGBT module replacement, capacitor bank renewal, or power board repair – all three can be done without scrapping the entire drive.

This is especially important for discontinued SINAMICS types (e.g. MICROMASTER series, older G120 versions), where the manufacturer no longer supplies a new unit, but component-level repair is a viable and economical alternative. These units can be diagnosed and repaired at LG Technologies' own repair center in Hungary - without shipping fees and diagnostic fees, with a 12-month warranty.

Frequently asked questions