UniMac Washer Error Code EI05: Invalid Infra-Red Data
EI05 on a UniMac UW pocket hardmount washer-extractor means the infra-red link received information that was invalid or out of range, typically a programming option set to a value the control does not accept. Recheck the value on the tool and try again. Cycles already stored keep working.
Low: a data link message only; the unit keeps running.
What does UniMac error code EI05 mean?
EI05 is the infra-red invalid data message on UniMac UW pocket hardmount washer-extractors such as the UWL035K12. When a tool writes a programming option to the washer, the control compares the value with the range that option allows. If the washer receives information that is invalid or out of range, it refuses the value and reports EI05. The link itself works, but the control will not take what was sent. Cycles already stored on the machine keep working, because nothing was changed. The cause is almost always the value on the tool, such as a typing mistake or a number outside the option's limits. The manual lists the programming option value sent, the tool settings and file for this machine, entry mistakes, and the control limits for that option.
Affected models and control systems
Listed for the PHM1263R family of UniMac UW pocket hardmount washer-extractors (UWL/UWN/UWU 035-125), such as the UWL035K12, front-end control with infra-red window.
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
- EI05 after sending a changed option
- Tool reports the value was refused
- The old setting stays in effect
- Washer cycles run as before
Possible causes
Listed in UniMac's documentation
- Programming option value that was sent
- Tool settings and file for this machine
- Typing or entry mistakes in the option
- Control limits for that option
Other likely causes — what usually sits behind error code EI05 on this control. A technician confirms which one it is before any part is replaced.
- A value copied from another UW size whose limits are wider
- A decimal or digit slipped when the value was entered
- A file prepared for a different cycle table than the washer holds
Safe checks before calling for service
- Recheck the programming option value on the tool and try again.
- Compare the value with the range for the option.
- Do not change other options at the same time.
- If EI05 returns with a sensible value, call us.
- Note the option name and the value you tried.
How a technician diagnoses error code EI05
- Identify which option was being written and its allowed range.
- Read the current value from the washer and compare it with the intended one.
- Send the option alone with a value inside the range.
- Confirm that the settings file matches this model.
- Suspect the receiver or control only if valid values are refused.
- Changing a program option alters how the machine runs, so it should be set with the machine's own data in hand.
- A wrong value accepted by mistake could affect wash or spin behavior.
- Control limits vary by model, and the right range comes from the machine's documentation.
How error code EI05 differs from similar codes
EI05 is a refused value. EI03 is a command that does not apply, and EI09 is data damaged in transit.
Technical reference
- Document
- Washer-Extractor Programming PHM1263R, Part No. F8208801R7, September 2015, Error Codes (p.53-54)
- Maker documentation
- UniMac owner support
- Edition
- Part No. F8208801R7, September 2015
- Models / control
- PHM1263R family pocket hardmount washer-extractor (UWL/UWN/UWU 035-125) front-end control
- Section
- Error Codes, Table 16, printed pp. 52-53 (PDF pp. 54-55)
- 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 washer error codes
Did the washer change its setting?
No. The control refused the value, so the old setting remains.
What does out of range mean?
The value is higher or lower than the control allows for that option.
Should I send several options at once?
No. Send one at a time so a bad value is easy to find.
Need help with UniMac error code EI05?
A technician confirms the cause on site and gives you the price in writing before any work starts.