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Haas Controller
System · Basic · 15 - 60 minutes
Haas Alarm 913 - Control Over Temperature
Alarm 913 fires when the temperature sensor in the electrical cabinet exceeds the thermal protection threshold, typically around 140°F (60°C). This alarm protects servo drives, power supplies, and control boards from overheating damage by shutting down machine operation until cooling is restored.
913
Haas Alarm 913 - Control Over Temperature
Over Temperature
This alarm is triggered when the thermal sensor in a critical component such as the spindle motor, servo amplifier, or control cabinet exceeds its programmed temperature limit. The MOCON or IOCON monitors temperature inputs from thermistors or RTD sensors embedded in motors and drives, and when threshold is exceeded the system shuts down to prevent permanent damage. The machine will not resume operation until temperatures return to safe levels and the alarm is cleared.
Root Cause Summary
Alarm 913 fires when the temperature sensor in the electrical cabinet exceeds the thermal protection threshold, typically around 140°F (60°C). This alarm protects servo drives, power supplies, and control boards from overheating damage by shutting down machine operation until cooling is restored.
Safety
- Allow cooling before restart
- Allow cabinet to cool completely before restarting system
- Allow the control cabinet to cool down before attempting any repairs. High temperatures can cause burns.
- Disconnect power to the CNC machine before opening the control cabinet for inspection or repair. Lockout/Tagout procedures must be followed.
- Be aware of potential electrical hazards when working inside the control cabinet. Use proper safety equipment and procedures.
- Some components inside the cabinet may retain a charge even after power is disconnected. Discharge capacitors before handling sensitive components.
- If the AC unit contains refrigerant, do not attempt to repair it yourself. Contact a qualified HVAC technician.
- Ensure proper grounding of all components within the cabinet.
Causes and Fixes
- 1
Locate electrical cabinet air filters
Find the intake air filters on the electrical cabinet door or side panels, typically behind removable grilles or filter housings.
Ensure machine is powered down and locked out before opening electrical cabinet
- 2
Remove and inspect filters
Remove filter elements and check for oil mist, coolant residue, or metal chip accumulation that blocks airflow.
Hold filter up to light source - you should see light through clean filter media
- 3
Clean or replace filters
Clean reusable filters with compressed air or mild detergent, or install new disposable filters per Haas specifications.
Clean filters weekly in high-contamination environments like cast iron machining
- 4
Verify airflow restoration
Power up machine and feel for strong airflow at intake filters, then monitor for alarm 913 recurrence during operation.
Call a technician if:
- ·Temperature sensor replacement required
- ·Servo drive or power supply replacement needed
- ·Alarm persists after all cooling system maintenance
Prevention
- Replace air filters every 3-6 months depending on shop environment
- Keep electrical cabinet area clear of obstructions
- Monitor shop ambient temperature during summer months
- Schedule annual cooling system inspection
Common Mistakes
- Ignoring gradual temperature rise before alarm triggers
- Using non-genuine replacement filters that don't seal properly
- Blocking electrical cabinet ventilation with storage or tooling
- Running machine in ambient temperatures above 95°F without additional cooling
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