Yaskawa GA800 E93 Fault — What It Means
The E93 fault code on a Yaskawa GA800 VFD cannot be universally defined because Yaskawa’s published GA800 troubleshooting materials do not include an E93 entry in the standard fault list. Fault code meanings can vary by firmware revision and application configuration. The GA800 maintenance manual directs technicians to use the elementary diagram first, then cross-reference the fault code in the drive’s built-in fault history and the full technical manual for your specific model and software version.
Because the GA800 service documentation limits field repair to fan and control board replacement, faults that fall outside those two areas require either consultation with Yaskawa technical support or access to the complete technical manual for your drive’s serial number and firmware. Do not assume E93 shares the same meaning as similarly numbered codes on other Yaskawa drive families or other manufacturers.
Before You Replace Anything
Do not replace the control board before consulting the drive’s fault history and elementary diagram. Many GA800 faults point to external wiring, parameter mismatches, or component issues that a board swap will not fix.
Common Causes
- Firmware-specific fault definition The E93 code may be defined only in your drive’s installed firmware version, so the meaning must be looked up in the drive’s display menu or technical manual addendum.
- Parameter configuration mismatch An incorrect parameter setting for your motor or application can trigger non-standard fault codes that do not appear in generic troubleshooting guides.
- External control signal fault A wiring issue on a digital input, analog reference, or communication bus can generate fault codes that require tracing the elementary diagram.
- Internal hardware fault A failing component on the control board, gate driver, or power stage may log a fault code that points to board-level repair or replacement.
Quick Diagnosis
Answer these to narrow it down fast.
Does the drive display the fault code in its fault history menu?
No: The fault may have been cleared or the display is not functioning. Power-cycle the drive and observe whether the fault reappears on startup.
Can you access the drive's parameter list and elementary diagram for your model?
No: Contact Yaskawa technical support or your distributor to obtain the correct technical manual and parameter list for your drive's serial number.
Is the fault occurring during motor startup, running, or only when a specific input signal is active?
No: The fault may be internal to the drive. Proceed with control board and fan inspection per the maintenance manual, or arrange for factory service.
Step-by-Step Fix
- Record the fault details from the drive’s keypad by navigating to the fault history menu and writing down the fault code, description, and any accompanying alarm text.
- Locate your drive’s technical manual using the model number and serial number printed on the drive nameplate, then search the fault code table for E93.
- Review the elementary diagram in the manual to identify which circuit or function corresponds to the fault, following Yaskawa’s recommended troubleshooting sequence of diagram first, then code.
- Check all control wiring at the terminal strip for loose connections, damaged insulation, or incorrect pin assignments that match the circuit identified in step three.
- Verify parameter settings in the drive’s programming menu against the motor nameplate and application requirements, particularly acceleration, deceleration, and control-mode parameters.
- Inspect the cooling fan and control board for physical damage, burnt components, or debris, following the maintenance manual’s guidance for fan and board replacement if either shows visible fault.
- Contact Yaskawa technical support with your drive serial number, fault history printout, and parameter list if the fault persists or if the technical manual does not define E93 for your firmware version.
Parts Often Needed
| Part | Notes |
|---|---|
| Yaskawa GA800 control board | Amazon | Order by drive model and serial number; requires parameter backup before replacement. |
| Yaskawa GA800 cooling fan | Amazon | Match fan voltage and airflow direction to the drive’s nameplate specifications. |
When to Call a Pro
Call a Yaskawa-certified technician or your distributor’s service team if you cannot locate the E93 fault definition in your drive’s technical manual, if the fault reappears after parameter correction and wiring checks, or if you lack the tools to safely measure control signals and power-stage voltages. The GA800 maintenance manual explicitly limits field repair to fan and control board replacement, so any fault requiring deeper diagnosis or power-stage work must be handled by trained personnel with access to Yaskawa’s full service documentation and replacement procedures.
Rough cost: A pro service call runs about $200–600 depending on diagnostic time and whether the fix is a fan, board, or external wiring.