IPSO Washer-Extractor Error Code Ed05: IGBT Surge

What does IPSO error code Ed05 mean?

The drive's output stage is built from IGBT power switches that shape the current going to the motor. They tolerate normal loads, but they cannot survive a sudden surge. A short in the motor, damaged wiring or heavy drag at the basket can send current up faster than the drive can react by other means, so the protection turns the switches off. The control shows Ed05. Plant staff see a sudden stop, often as the spin begins. The manual says to power down for at least two minutes and to check that the motor is not shorted. The pause lets the drive's stored energy drain away. A shorted winding, damaged wiring, heavy drag or a damaged drive are the likely causes. With damp laundry environments and washdown water, moisture reaching motor terminals is worth including on the list.

Affected models and control systems

CHM495R washer-extractors, 20 to 100 lb, with the front-end control. Other controller generations use different codes.

Code numbers and their meaning can change between control generations. We match the full model and control before acting on a code.

What you may notice

• Machine stops suddenly as extract begins
• Ed05 on the display
• Code returns on the next restart
• Possible burnt odor from the motor area

Possible causes

Listed in IPSO's documentation

• Motor insulation tested for a short to ground
• Basket and bearing drag
• The drive's output switches
• Damp motor terminals

Other likely causes — what usually sits behind error code Ed05 on this control. A technician confirms which one it is before any part is replaced.

• Washdown water that reached the motor terminal box
• A motor lead rubbed through against the frame
• Winding insulation worn after years of heat cycles
• Output switches in the drive already weakened by earlier surges

Safe checks before calling for service

How a technician diagnoses error code Ed05

1. Wait out the discharge period and read the code history.
2. Disconnect the motor leads and meter windings and insulation resistance.
3. Inspect the terminal box and leads for moisture or chafing.
4. Turn the basket by hand to check for drag.
5. Test the drive with the motor disconnected before deciding on a replacement.

Technical reference

Document

Washer-Extractor Programming CHM495R_SVG, Part No. F8208501ENR10, March 2017, Error Codes (pp. 36-37)

Edition

Part No. F8208501ENR10, March 2017

Models / control

CHM495R family washer-extractor front-end control (20-100 lb)

Section

Error Codes table, pp. 36-37 (E Pr only on Design 1 models; Ed01-Ed11 on Design 2 and 3 models)

Checked

October 2026

We use the maker's document to read the code and do not reproduce it. Always confirm the complete model and control before applying these steps.