Hill Phoenix Display Refrigerator Error Code dA: Door Open
DA, Door open, on a Hill Phoenix CNZLA or CNEZLA merchandiser with the Dixell XR06CX controller means the door switch input has shown the door open for longer than the digital input delay. Close the door fully. The alarm stops as soon as the digital input is deactivated.
Low: a door left open triggers it, and closing the door normally clears it.
- Code
- DA
- Maker
- Hillphoenix
- Equipment
- Display cases
- Applies to
- CNZLA / CNEZLA single-deck merchandisers with Dixell XR06CX controller
What does Hillphoenix error code DA mean?
The Dixell XR06CX can use its digital input as a door switch. If the input stays active longer than the di delay, meaning the door has been open too long, the controller shows dA. According to the manual's section 12, the compressor and fans restart at that point if the rd parameter is set to y. The high and low temperature alarms, HA and LA, are disabled while the door is open, so a door left open will not be flagged by temperature at the same time. The alarm stops as soon as the digital input is deactivated, which is when the door closes. The manual lists one cause, the door left open longer than the delay, with the input set as a door switch.
Affected models and control systems
CNZLA and CNEZLA single-deck merchandisers (R-290) with the Dixell XR06CX controller, where the digital input is set as a door switch. The alarm is described in Appendix B, sections 8 and 12.
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 on the controller display
- The case door or lid is ajar
- The compressor and fans start up again while the door is open
Possible causes
Listed in Hillphoenix's documentation
- Door left open longer than the di delay (digital input set as door switch)
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.
- Door not closing because of a damaged gasket or hinge
- Door switch out of adjustment, so it reads open when the door is shut
- Cart or stock holding the door ajar
- Switch wiring loose or damaged, giving an open signal
Safe checks before calling for service
- Close the door fully and check that nothing is holding it open.
- Look at the gasket and latch for damage where you can see them.
- Watch the display and see whether dA clears once the door is shut.
- If dA returns with the door shut, note it for the technician, since the switch may be misreading.
How a technician diagnoses error code DA
- Read the display and confirm the digital input is set as a door switch and the di delay.
- Check the door, gasket, hinges and latch.
- Check the door switch alignment and its state with the door open and closed.
- Check the switch wiring for damage or a loose terminal.
- Adjust or replace the switch after the test, and confirm the alarm clears.
- The door switch wiring connects to the controller beside the case's electrical supply.
- Door and latch repair on a case often needs realignment and a new gasket, which a technician handles.
How error code DA differs from similar codes
DA is the door open alarm. While it shows, the HA and LA temperature alarms are disabled, so they do not appear at the same time.
Technical reference
- Document
- CNZLA/CNEZLA (R-290) Single-Deck Merchandiser Installation & Operations Manual, Appendix B Dixell XR06CX operating instructions
- Edition
- P117904D, Rev 1.04, 01/25
- Models / control
- CNZLA / CNEZLA single-deck merchandisers with Dixell XR06CX controller
- Section
- Appendix B2-B3 Dixell Operating Instructions, section 12 Alarm Signalling and 12.1 Alarm Recovery (PDF pp. 42-43); section 8 Digital Inputs
- 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 Hillphoenix display case error codes
Why do the compressor and fans start while the door is open?
The manual says they restart if rd is set to y after the door has been open too long.
Will dA clear by itself?
Yes, once the door closes and the input is deactivated, as the manual says.
Why are there no HA or LA alarms with dA?
The manual says the high and low temperature alarms are disabled while the door is open.
Need help with Hillphoenix error code DA?
A technician confirms the cause on site and gives you the price in writing before any work starts.