UniMac Washer-Extractor Error Code EiXX: IR Communications Error
EiXX is an infrared communications error. The XX is a two-character value naming what went wrong in a transfer, and the display clears itself after 2 seconds. Jot down the two characters, re-aim the tool and try again.
Low: only the infrared data link is affected and the display clears itself.
- Code
- EiXX
- Maker
- UniMac
- Equipment
- Industrial laundry
- Applies to
- CHM1792C family washer-extractor (QN models, 20-100 lb) front-end control
What does UniMac error code EiXX mean?
EiXX stands for a whole family of infrared messages on a UniMac QN washer-extractor. The X characters are placeholders: the real display shows Ei followed by two characters, and those two characters name what went wrong in a transfer from an external device. The display clears itself after 2 seconds, which is why the first step is to write them down. Only the data link through the infrared window is affected, so washing, draining and spinning carry on and the laundry keeps moving. The manual lists the aim of the external device at the infrared window, window cleanliness and strong light, the two characters that follow Ei, and the control infrared circuit if it repeats. The two characters let us look up the exact reason for the failed transfer. A tool that is moved, a dirty window and bright light behind the tool explain most cases. If the message keeps returning, tell us the value you saw.
Affected models and control systems
This applies to the CHM1792C family of UniMac QN washer-extractors, 20 to 100 lb, front-end control, for example the UCA020QN. EiXX is a generic infrared message and the characters after Ei identify the specific event.
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
- Ei and two characters flashing for about 2 seconds
- Tool reporting a failed transfer
- Normal wash cycles
- A message that disappears before it can be read
Possible causes
Listed in UniMac's documentation
- Aim of the external device at the infrared window
- Window cleanliness and strong light
- The two characters that follow Ei
- Control infrared circuit if it repeats
Other likely causes — what usually sits behind error code EiXX on this control. A technician confirms which one it is before any part is replaced.
- A programming tool whose battery is low and sends a weak signal
- Sunlight or an overhead fixture shining on the window while the tool is aimed
- A screen protector or sticker added over the window that scatters the beam
Safe checks before calling for service
- Jot the two characters after Ei before they disappear.
- Re-aim the external device at the infrared window and try again.
- Wipe the window and shade it from strong light.
- If the message keeps returning, call us and tell us the value.
How a technician diagnoses error code EiXX
- Read the two characters after Ei and match them against the manual's infrared messages.
- Confirm that the tool and its software are suited to this control.
- Clean the window and test a transfer in shade at close range.
- Try a second tool to separate a tool problem from a control problem.
- Test the control's infrared circuit only when valid tools keep failing.
- The exact reason sits behind the two characters, and matching them needs the maker's table.
- Checking the infrared circuit means opening the control near live boards.
- Reprogramming through a flaky link can leave a half-loaded setting.
Technical reference
- Document
- Washer-Extractor Programming CHM1792C_SVG, Part No. F8641001ENR4, Error Codes Table 29 (pp. 100-107)
- Maker documentation
- UniMac owner support
- Edition
- Part No. F8641001ENR4, January 2020
- Models / control
- CHM1792C family washer-extractor (QN models, 20-100 lb) front-end control
- Section
- Error Codes, Table 29, pp. 100-108 (PDF pages equal printed pages)
- 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.
Related UniMac industrial laundry error codes
What do the XX stand for?
They are two characters that identify the exact event. Write them down because the display clears in 2 seconds.
Does EiXX affect washing?
No. Only the infrared data link is involved.
Do I need service for one EiXX?
No. A single occurrence after a bad transfer is normal. Call if it keeps returning.
Need help with UniMac error code EiXX?
A technician confirms the cause on site and gives you the price in writing before any work starts.