Atosa Prep Table Error Code dA: Door Open Alarm
DA on an Atosa prep table with the digital controller means the door is open, or the control believes it is. Close the door firmly, check that no pans or boxes keep it from seating, and look at the gasket. If dA stays on with the door shut, call us.
Low: the unit keeps cooling and the alarm clears when the door closes.
- Code
- DA
- Maker
- Atosa
- Equipment
- Prep tables
- Applies to
- Atosa prep table digital controller
What does Atosa error code DA mean?
A prep table keeps cold air in by sealing its door against a gasket, and a switch tells the digital controller whether the door is closed. When the switch reports open, the controller starts the dA alarm. According to the control, the compressor and fans restart when the door is open rather than staying off, so the table keeps working to hold temperature, which wastes energy and can frost the coil. Closing the door should make the message clear within a short time. If dA stays on with the door shut, one of two things is happening. Either the door is not seating, because of a warped or worn gasket, hardware out of line or a pan holding it ajar, or the door switch is not telling the control that the door has closed. The manual's list reflects both: a worn gasket, a switch stuck or out of position, hinge hardware out of line, and a pan or product holding the door open.
Affected models and control systems
This applies to Atosa MSF and MPF refrigerated prep tables with the digital controller, such as the MSF8302GR, MSF8307GR and MPF8202GR. 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
- DA shows with the door apparently closed
- The compressor and fans run more than usual
- Warm air or frost around the door edge
- The alarm clears only when the door is pushed hard
Possible causes
Listed in Atosa's documentation
- A worn gasket that keeps the Atosa door from sealing
- A door switch stuck or out of position, so dA stays on
- A hinge or hardware out of line, leaving the door ajar
- A pan or product holding the door open
Other likely causes — what usually sits behind error code DA on this control. A technician confirms which one it is before any part is replaced.
- A pan lip or a stack of boxes that nudges the door a quarter inch off the gasket
- A hinge that has dropped so the door rubs and does not reach the switch
- A door switch plunger packed with food residue that sticks in the open position
Safe checks before calling for service
- Close the door firmly.
- Check for pans or boxes keeping it from seating.
- Look at the gasket for gaps.
- Wait a minute to see if dA clears.
- If it stays on with the door shut, note how the door sits and call us.
How a technician diagnoses error code DA
- Read the code and confirm the door closes and latches.
- Inspect the gasket and the hinges for wear and alignment.
- Test the door switch with a meter as the door opens and closes.
- Check the switch wiring.
- Check the control input follows the switch.
- Replace the gasket, hinge parts or switch as the test shows.
- A door that will not seat wastes cold air, and hinge repair needs the door supported.
- The door switch and its wiring are inside the cabinet frame.
- A meter is needed to tell a failed switch from a misaligned door.
How error code DA differs from similar codes
CA and EA are external alarms on the same controller, so dA is the only one tied to the door.
Technical reference
- Document
- Atosa Instruction Manual (Salad prep table / Pizza prep table / Undercounter / Work top / Chef base), section 9 Alarm signalling
- Models / control
- Atosa prep table digital controller
- Section
- 9. Alarm signalling, printed p. 21 (PDF p. 22; table is an image)
- 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 Atosa prep table error codes
Why does dA show when the door looks closed?
It may be a hair open, or the switch may not be reporting it closed.
Does dA stop the cooling?
No. The compressor and fans restart as the control directs.
Will it clear by itself?
Yes, once the door closes and the switch reports it.
Need help with Atosa error code DA?
A technician confirms the cause on site and gives you the price in writing before any work starts.