IPSO Washer-Extractor Error Code E dr: Drain Alarm

What does IPSO error code E dr mean?

During a drain step the control expects the water level to fall to the programmed point. It gives the drain 15 minutes to do that. If the level has not come down in that time, the control raises the alarm and shows E dr. Staff see a drum full of water that never empties and a load that will not spin. A drain valve that stays shut or opens only part way is one reason, a blocked drain line or floor drain that holds the water back is another, and a level sensor that never reports the drum as empty is a third. A drain time or valve setting that was changed is also on the list. The manual treats cutting power as the reset. Because the drum may be full when the door lock lets go, it is wise to be ready for water on the floor. If the building drain backs up for other machines too, the problem lies outside this washer.

Affected models and control systems

This applies to IPSO washer-extractors in the CHM495R family, 20 to 100 lb, with the front-end control in that programming manual.

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

• Water stays in the drum and E dr appears
• The load will not spin because the drum is still full
• The floor drain gurgles or backs up

Possible causes

Listed in IPSO's documentation

• Drain valve that stays shut or opens only part way
• Blocked drain line or floor drain holding the water
• Level sensor that never reports the drum as empty
• Drain time or valve setting changed

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

• Lint and small items packed in the drain line after a long run of loads
• A drain valve diaphragm that has stiffened and no longer opens fully

Safe checks before calling for service

How a technician diagnoses error code E dr

1. Read the code and note how much water remained in the drum.
2. Check the floor drain and the drain line for blockage and flow.
3. Verify the drain valve opens fully when commanded.
4. Check the level sensor reading against the actual water level.
5. Review the drain time and valve settings, then replace the valve or sensor only after it tests bad.

How error code E dr differs from similar codes

E dr is a drain that never finishes. E Sd is a slow drain that still empties, and E Ld is a leak detected at the drain valve.

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.