Blakeslee Conveyor Dishwasher Error Code Z17: Rinse Water Supply Failure
Z17 RINSE WATER SUPPLY FAILURE means the rinse water supply failed. The manual says to check that the water supply works and the rinse arms and nozzles are in position, then turn the machine off and on after a few seconds. If it persists, call a service technician.
High: without rinse water supply the machine cannot finish a cycle properly.
- Code
- Z17
- Maker
- Blakeslee
- Equipment
- Conveyor dish machines
- Applies to
- RC-series rack conveyor with scrolling-text display and LED bar
What does Blakeslee error code Z17 mean?
Final rinse water has to arrive at the rinse arms at the right flow. The control checks that the rinse supply is present when a rinse is requested, and if it is not, it stops and displays Z17 RINSE WATER SUPPLY FAILURE. The manual gives the meaning as rinse water supply failure and lists three things for the operator: make sure the water supply works, make sure the rinse arms and nozzles are in position, and turn the machine off and on after a few seconds. If the alarm persists, it says to contact Technical Service. The wording differs from the boiler alarms: Z17 is about the water coming to the rinse, not about its temperature or the boiler heating. A closed valve, low supply pressure or a rinse path that is displaced can all trigger it.
Affected models and control systems
Blakeslee RC-series rack conveyor dishwasher. The PDF is Blakeslee's RC44 User Manual and prints no model name; the same alarm list appears in the RC62 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
- Z17 RINSE WATER SUPPLY FAILURE on the display
- Rinse spray weak or absent
- Soap residue left on dishes
- Machine stops at the rinse stage
Possible causes
Likely causes — what usually sits behind error code Z17 on this control. A technician confirms which one it is before any part is replaced.
- Supply valve to the rinse closed or partly closed
- Low building water pressure
- Rinse arms or nozzles out of position
- Rinse valve or booster pump not operating
Safe checks before calling for service
- Check that the water supply valve is open and that water is available elsewhere in the kitchen.
- Check that the rinse arms and nozzles are in position, as the manual says.
- Turn the machine off, wait a few seconds, and turn it on again.
- If Z17 returns, stop running racks.
- Note whether other taps were running at the time and what you changed.
How a technician diagnoses error code Z17
- Read the alarm history and note any boiler fill or heating alarms near the Z17 entry.
- Measure the dynamic pressure at the rinse inlet.
- Verify the rinse arms and manifold seat correctly and are not blocked with scale.
- Test the rinse valve and any booster pump for supply voltage and coil continuity.
- Replace the failed valve, pump or sensor according to the result.
- Rinse valves and pumps are wired at line voltage.
- The rinse circuit is pressurized hot water.
- Distinguishing a supply problem from a failed valve takes pressure and electrical readings.
How error code Z17 differs from similar codes
Z17 is about rinse water arriving. B1 to B5 and B10 cover the rinse boiler fill, probe and temperature.
Technical reference
- Maker documentation
- Blakeslee owner support
- Edition
- COD. 4950E_U_USA, Ed. 00 - 09/2016
- Models / control
- RC-series rack conveyor with scrolling-text display and LED bar
- Section
- Chapter 12.2.1 Alarms description (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 Blakeslee conveyor dish machine error codes
Is Z17 a heating problem?
No. It reports that the rinse water supply failed, not that the water was cold.
What should I check first?
The supply valve, then whether the rinse arms and nozzles are in place.
Will a restart clear Z17?
If the cause was a short interruption, yes. If it returns, call.
Need help with Blakeslee error code Z17?
A technician confirms the cause on site and gives you the price in writing before any work starts.