What does Yaskawa GA800 E44 Fault - Causes & Fix mean?

E44 is not a standard GA800 code. Likely a misread or different series. GA800 option-card faults show as oFA errors. Check manual.

How do I fix Yaskawa GA800 E44 Fault - Causes & Fix?

Work through the step-by-step fix below. Start with the quick reset and the most common cause, then check the specific part this guide points to. Most fixes need only basic hand tools and the right replacement part.

Can I keep using my Yaskawa appliance with GA800 showing?

Usually not. Yaskawa appliances show this error when a part or safety circuit is out of range, so running it can stop the cycle or make the problem worse. Diagnose and clear the error before normal use.

What part is most commonly replaced for Yaskawa GA800 E44 Fault - Causes & Fix?

The parts that most often fix Yaskawa GA800 E44 Fault - Causes & Fix are listed in the parts section of this guide. Match the part to your exact model and serial number before you buy.

Is Yaskawa GA800 E44 Fault - Causes & Fix a DIY repair or do I need a technician?

Many fixes are DIY-friendly with basic tools, such as door switches, drain pumps, water inlet valves, thermostats, heating elements, and filters. Sealed-system, refrigerant, gas, or high-voltage work should go to a licensed technician for safety.

Yaskawa GA800 E44 Fault - Causes & Fix

Yaskawa GA800 E44 Fault — What It Means

E44 does not appear in verified Yaskawa GA800 documentation. The GA800 uses fault codes in the oFA and bUS families for option-card and communications errors, not E44. The most common option-card fault on the GA800 is a Communication Option Card Connection Error at the CN5-A connector, which means the drive cannot communicate with an installed option card. If your display shows E44, double-check the exact text on the keypad or consult your model’s manual, because this code may belong to a different Yaskawa series or be a misread of another fault. The GA800 troubleshooting flow for option-card faults focuses on connector seating, physical damage to the card, and card replacement.

Before You Replace Anything

Technicians sometimes replace the entire drive when the option card or connector is the real culprit. Always inspect and re-seat the card, and check for bent pins or physical damage before ordering a new drive.

Jump to Fix

Common Causes

Option card not fully seated The communication option card at CN5-A is not pushed completely into the connector or has worked loose over time.
Failed option card The option card itself has failed due to age, heat, or electrical stress and no longer communicates with the drive.
Bent or damaged pins Physical damage to the connector pins on the card or drive socket prevents a solid electrical connection.
Network cable or connector damage On Ethernet or fieldbus option cards, damaged network cabling or connectors at the card can trigger communication faults.
Code from different Yaskawa series E44 may be a fault code from a different Yaskawa drive family that was confused with the GA800.

Quick Diagnosis

Answer these to narrow it down fast.

Is an option card installed in the CN5-A connector slot on your GA800?

Yes: The fault is almost certainly related to that card or its connection. Proceed to re-seat and inspect the card.
No: Verify the exact fault code on the keypad display. E44 is not a standard GA800 code, so consult your manual or contact Yaskawa support with your model and serial number.

Does the option card sit flush in the connector with no visible gaps or tilting?

Yes: The card is properly seated. Inspect for bent pins or physical damage, then test with a known-good card if available.
No: The card is not fully seated. De-energize the drive, press the card firmly into the connector until it clicks, and re-test.

Does the fault clear after re-seating the option card and power-cycling the drive?

Yes: The problem was a loose connection. Monitor the drive to confirm the fault does not return.
No: The option card or connector is damaged. Replace the card and, if the fault persists, contact Yaskawa Technical Support with the drive model, serial number, and option-card part number.

Step-by-Step Fix

Verify the exact fault code on the GA800 keypad display and write down the complete text, because E44 is not documented as a standard GA800 fault.
De-energize the drive by turning off the disconnect and waiting at least five minutes for capacitors to discharge before opening the cover or touching the option card.
Locate the option card installed in the CN5-A connector slot, typically on the front or side of the drive depending on the model and frame size.
Inspect the card and connector for bent pins, cracks, burn marks, or any visible physical damage on both the card edge and the drive socket.
Remove and re-seat the card by gently pulling it straight out, then pushing it firmly back into the connector until it clicks or seats flush with no gaps.
Re-energize the drive and power-cycle by turning the disconnect back on, then observe the keypad for any fault codes during startup.
If the fault remains, replace the option card with a known-good spare or new card of the same part number, and re-test. If the fault still does not clear, record the drive model number, serial number, and all installed option-card part numbers and contact Yaskawa Technical Support for further diagnostics.

Parts Often Needed

Part	Notes
Yaskawa GA800 Communication Option Card	Amazon \| Match the exact part number for your installed card type (Ethernet, DeviceNet, Profibus, etc.) and order from Yaskawa or an authorized distributor.
Network Cable (if Ethernet option)	Amazon \| Use shielded Cat5e or better rated for industrial environments if the existing cable shows damage.

When to Call a Pro

Call a qualified industrial electrician or Yaskawa-certified technician if you are unfamiliar with variable-frequency drives, if the fault does not clear after re-seating or replacing the option card, or if you need to verify proper network configuration and parameters. VFDs operate at high voltage and store energy in capacitors even after power is removed, so improper handling can cause serious injury or equipment damage. A technician can safely inspect the CN5-A connector, test with diagnostic equipment, and coordinate warranty or advanced support with Yaskawa if the drive itself is faulty.

Rough cost: A pro service call runs about $150-400.