Yaskawa GA800 E15 Fault Code — What It Means
The E15 fault code does not appear in verified Yaskawa GA800 documentation or alarm tables. Fault codes and their meanings vary between drive families and firmware versions. The GA800 series does use alphanumeric fault designations, but without confirmation from your specific drive manual or display history, the exact cause of E15 cannot be determined. Similar precharge and control circuit faults in the GA800 family (such as Uv3) relate to soft-charge bypass relay issues, but this cannot be assumed for E15 without verification.
Before attempting any repair, consult the alarm history on your keypad and cross-reference the code with the alarm table in your GA800 manual or the label inside the drive cover. If the code persists after a power cycle, contact Yaskawa technical support with your drive model number and serial number for accurate diagnosis.
Common Causes
- Transient power event A brief voltage sag, surge, or line disturbance may trigger an unverified fault code that clears on reset.
- Control board communication error Loose ribbon cables or corrupted firmware can generate non-standard fault codes on the display.
- Precharge or soft-charge circuit fault Damage to the bypass relay or contactor path can cause related alphanumeric faults in GA800 drives.
- Parameter corruption or mismatch Incorrect drive configuration or a recent parameter upload may result in fault codes outside the standard table.
- Hardware failure in control circuitry A failing control board or gate driver can produce unrecognized or intermittent fault codes.
- Firmware version discrepancy Older or updated firmware may display codes differently or use codes not listed in your printed manual.
Step-by-Step Fix
- Power down the VFD completely by opening the upstream disconnect or circuit breaker and waiting at least five minutes for capacitors to discharge.
- Record all fault details from the keypad alarm history, including the exact code, time stamp, and any other active or recent faults.
- Inspect internal connections by removing the front cover and checking ribbon cables between the control board and power board for secure seating and signs of arcing or corrosion.
- Consult the alarm table in your GA800 manual or the label on the inside of the drive cover to verify whether E15 is listed and its official meaning.
- Restore power and reset the fault by cycling the drive on and observing whether the fault returns immediately or under load.
- Contact Yaskawa technical support at 1-800-YASKAWA with your drive model, serial number, and recorded fault history if the code is not in your manual or persists after reset.
- Replace the control board or drive only after Yaskawa confirms the fault cause and recommends replacement, as the GA800 maintenance manual limits field repair to fan and board replacement under factory guidance.
Parts Often Needed
| Part | Notes |
|---|---|
| Yaskawa GA800 control board | Amazon | Factory replacement board if Yaskawa support confirms board failure after fault analysis. |
| Soft-charge bypass relay assembly | Amazon | For verified precharge circuit faults; consult Yaskawa or an authorized distributor for GA800-compatible part. |
When to Call a Pro
Call a qualified VFD technician or Yaskawa-authorized service partner immediately if the fault code does not appear in your manual, if the drive will not clear the fault after a full power cycle, or if you lack a multimeter and experience working safely inside energized industrial equipment. The GA800 maintenance documentation explicitly directs users to contact Yaskawa technical support for faults beyond simple fan or control board replacement. Do not attempt to replace internal components without confirming the fault cause and obtaining the correct part number from the manufacturer, as incorrect repairs can void warranties and create safety hazards.