Siemens SINAMICS V20 VFD
Siemens SINAMICS V20 VFD code A523: Output current ripple too high
The calculated output ripple level has exceeded the safe threshold, which triggers a warning without stopping the booth equipment.
Safety first. This code involves a gas, flame or electrical hazard. Do not keep resetting it. Leave burner, gas train and high voltage work to a qualified technician. WERCS answers 24/7 at (877) 489-3727.
- Code
- A523
- Name
- Output current ripple too high
- Controller
- Siemens SINAMICS V20 VFD
- Type
- Power supply
- What it does
- Warning: the equipment keeps running and flags a problem
- Risk
- RED Specialist territory
- Reset
- Clears on its own when the condition goes away
- Source
- The manufacturer's manual (subscribers see which manual and page)
Updated November 4, 2026
How to fix it
Subscribers get:
- What to do next, in plain words
- What the manual says to do, and the page it is on
- The 2 common causes listed for this code
- Booking a live video call with Ben, a master booth technician ($250/hr, paid per call)
Questions about this code
What does Siemens SINAMICS V20 VFD code A523 mean?
The calculated output ripple level has exceeded the safe threshold, which triggers a warning without stopping the booth equipment.
Is Siemens SINAMICS V20 VFD code A523 dangerous?
It is graded red, specialist territory: it involves a burner, gas, flame or safety lockout, so leave the repair to a qualified technician.
How do I fix Siemens SINAMICS V20 VFD code A523?
The manual's fix and the step by step check for this code are in WERCS Diagnose, plans from $49 a month. For help right now, WERCS answers 24/7 at (877) 489-3727.
Other Siemens SINAMICS V20 VFD codes
A505 · Converter I2tA506 · IGBT junction temperature rise warningA507 · Converter temperature signal lostA511 · Motor overtemperature I2tA535 · Braking resistor overloadA541 · Motor data identification activeA600 · RTOS overrun warningA910 · Vdc_max controller deactivatedA911 · Vdc_max controller activeA912 · Vdc_min controller active