- Industrial machinery
- CNC machining centres
123
Haas alarm 123: spindle drive fault signal
Risk level
Critical
Stop using the equipment and contact a professional.
Urgency
Immediate
Quick answer
On a Classic Haas Control machine alarm 123 means the control sensed a spindle-drive failure. Stop operation record any drive-specific display code and use only the normal documented power cycle once.
Safety first
What to do now
- Stop operation and record the machine state
Leave the spindle stopped. Record alarm 123 the machine model control generation recent tool or program event and any drive-specific code visible without opening a cabinet or defeating a guard.
- Use the normal control power cycle once
A trained operator may cycle machine power once using the normal Haas shutdown and startup controls as the official alarm result instructs. Stop and call service if alarm 123 returns.
What you must never do
- Do not attempt this professional task: Run the drive-specific Haas alarm 123 diagnosis
What a technician must be able to justify
A technician is coming
These are the steps they must carry out and show you. Tick them as they work: if steps are skipped, do not accept a part swap.
These are not instructions for opening or handling the equipment yourself. They are the checks that should support a technical conclusion.
Run the drive-specific Haas alarm 123 diagnosis
What they doA Haas-qualified service technician should identify the installed spindle drive read its own error code and use the matching drive manual to test the documented motor drive regenerative-load supply cooling configuration and signal branches.
Before accepting a part or repair
Nothing has been shown yet. Do not accept a part swap based on the code alone.
Where this code applies
A code is meaningful only inside the right product and version context.
Primary scope
- System
- Industrial machinery
- Brand
- Haas Automation
- Product type
- CNC machining centres
Known code variants
- CHC alarm 123
- Haas alarm 123
- Haas spindle drive fault 123
What it means
Haas states that multiple spindle drive motor regenerative-load supply and configuration branches can produce alarm 123. The control alarm alone does not identify the failed part.
Warnings and stop conditions
- Criticalsource verified
CNC control cabinets contain hazardous electrical energy and the spindle can start or move unexpectedly. Do not open the cabinet measure drive voltage install jumpers or rotate the spindle by hand as a user check.
Evidence: Haas Classic Control spindle drive troubleshooting guide
Sources and technical references
- 1
Haas Classic Control alarm 123 result
Haas Automation · 2026 · official_doc
- 2
Haas Classic Control spindle drive troubleshooting guide
Haas Automation · 2025 · official_doc
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