Start here — before replacing any parts
Err-10 identifies a control-panel communication fault in the cited controller manual, not an instruction to replace the panel immediately.
Confirm your JACK A4B uses the A4B-A-C control-box edition; fault tables are not necessarily identical across controllers.
Manual scope: Control panel wiring and firmware revision
Do these checks in order
Follow the steps below and keep a record of what changes after each one. Stop when an actual cause is confirmed.
Disconnect power fully. Identify the A4B-A-C control box and attached panel; photograph both labels before selecting replacement parts.
Inspect the accessible display-to-control-box cable along its route for pinching, damaged insulation, wet plugs or partial connection.
If a matching connector is visibly loose, reseat it according to the maker’s connector orientation; do not bend pins or mix similar plugs.
Reassemble and restart. Note whether the panel boots, responds to controls, and whether Err-10 returns.
If the problem is gone
Communication and control functions return after reseating: the connection likely caused the issue.
If the problem is still there
Err-10 persists with a correctly seated undamaged cable: qualified service should test the harness and matching HMI/controller rather than changing both blindly.
Which cause matches your result?
Use these more specific checks only when the earlier steps point to that possibility.
01The panel-to-controller connection is loose
Unplug the machine and inspect the accessible panel communication connector.
Reconnect the correct plug securely.
02Communication still fails
The code does not identify a single failed component.
Ask authorized service to examine the control-panel cable and matching controller.
How can I tell it is actually fixed?
Cycle power according to the manual and confirm normal panel input and machine response.
Before buying a replacement part
Control panel firmware, harness pinout and controller edition must match.
Where this guidance comes from
Primary reference: View the manufacturer or manual reference ↗
Applicability: Control panel wiring and firmware revision. Source evidence: Manufacturer manual confirmed; user search demand unquantified.
The instructions are original English troubleshooting explanations derived from the listed technical facts; they are not a verbatim service manual. Do not apply them to an unverified revision.