Yaskawa GA500 AC Drive
Yaskawa GA500 AC Drive code oH: Heatsink Overheat
The drive heatsink temperature exceeded the overheat alarm level, which will eventually stop the motor operation.
- Code
- oH
- Name
- Heatsink Overheat
- Controller
- Yaskawa GA500 AC Drive
- Type
- Over temperature
- What it does
- Fault: the equipment trips and stops
- Risk
- YELLOW Booth plays by its own rules
- Reset
- Needs a manual reset
- 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 4 common causes listed for this code
- The step by step check for this problem, one check at a time
- Booking a live video call with Ben, a master booth technician ($250/hr, paid per call)
Questions about this code
What does Yaskawa GA500 AC Drive code oH mean?
The drive heatsink temperature exceeded the overheat alarm level, which will eventually stop the motor operation.
Is Yaskawa GA500 AC Drive code oH dangerous?
It is graded yellow: not hard, but a booth does it differently than the gear most techs know, so follow the checks in order.
How do I fix Yaskawa GA500 AC Drive code oH?
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.