Speed Queen Commercial Washer Error Code EC:24: Card Memory Full

What does Speed Queen error code EC:24 mean?

EC:24 is a card error on Speed Queen/Alliance commercial automatic washers that record events or data on a smart card. The display text is "Insufficient Memory on Card," and the manual's error listing says the card memory is full. The action is to download the card contents to a PC and clear the card for re-use. A card has a small memory. The washer writes to it, and when there is no space left, the control cannot write and refuses to go on. The manual does not say what is written to the card, how many entries fit, or what happens to the data after it is downloaded. It also lists no other cause. The remedy sits on the PC side. The contents are saved with the laundry's card software, and then the card is cleared so it can be used again. Until that is done, the same card will keep raising EC:24 in any washer. Using a card with free memory is a quick way to get the washer back in use while the full card is handled.

Affected models and control systems

Speed Queen/Alliance commercial automatic washers covered by manual H002C: EDC (Micro-wand IIIe) models, MDC models and NetMaster models. The code is read from the card-reader (smart card) side of these controls, and the model numbers are listed on page 6 of the 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

• The display shows "Insufficient Memory on Card" (EC:24)
• The card is refused when it needs to be written
• The card has been in use for a long time without being cleared

Possible causes

Likely causes — what usually sits behind error code EC:24 on this control. A technician confirms which one it is before any part is replaced.

• Card memory is full
• The card has been used for many cycles without being downloaded and cleared
• The card holds a very large amount of old data from earlier use
• A previous download did not clear the card afterward

Safe checks before calling for service

How a technician diagnoses error code EC:24

1. Read the code and ask how the card is used.
2. Download the card contents with the card software.
3. Clear the card and confirm the memory is free.
4. Test the card in the washer.
5. Check the reader only if a cleared card is still refused.

Technical reference

Document

Commercial Automatic Washer (Metered and Nonmetered) Troubleshooting H002C

Edition

Part No. 39201R9, November 2016

Models / control

Speed Queen/Alliance commercial automatic washers H002C: EDC (Micro-wand IIIe) models, MDC models, NetMaster models (model numbers p. 6)

Section

32. EDC Error Code Listing, printed p. 59 (PDF p. 61); 41. MDC Error Code Listing, printed p. 72 (E:dr, E:FL, EC:19); 50. NetMaster Error Code Listing, printed pp. 90-93 (PDF pp. 92-95)

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.