Fanuc alarm codes
428 alarms documented. Each entry explains the code, likely causes and the replacement part that resolves it.
αi SVM
- - (blink)Inverter: abnormal control power supply - feedback/pulsecoder power path pulling down the SVM control supply.
- 1Inverter: internal cooling fan stopped.
- 2Inverter: control power supply undervoltage.
- 5Inverter: DC link undervoltage.
- 6Inverter: overheat (heat sink temperature abnormally high).
- 8Inverter: DC link current alarm, L axis (first axis on multi-axis SVM).
- 8.Inverter: IPM alarm (L axis) - intelligent power module latched overcurrent/short; overheat variant reported by CNC as SV0603.
- 9Inverter: DC link current alarm, M axis (second axis on multi-axis SVM).
- 9.Inverter: IPM alarm (M axis), including IPM overheat (OH) variant.
- AInverter: DC link current alarm, H/N axis (third axis; never valid on 1-2 axis units).
- A.Inverter: IPM alarm (N/H axis), including IPM overheat (OH) variant.
αi PSM
- 01PSM-5.5i to PSM-15i: main-circuit power module (IPM) detected an abnormal condition. PSM-15i to PSM-37i: overcurrent flowed into the input of the main circuit.
- 02Cooling fan for the control circuit has stopped.
- 03Temperature of the main circuit heat sink has risen abnormally.
- 04In the main circuit the DC voltage (DC link) has dropped.
- 05Main circuit capacitor was not recharged within the specified time (precharge failure).
- 06Control power supply voltage decreased.
- 07DC voltage at the DC link is abnormally high.
- 0ACooling fan of the external cooling fin has stopped.
- AExternal cooling-fin fan stopped
αi SPM
- 01Spindle motor overheat - inside temperature of motor exceeds specified level.
- 02Excessive speed deviation
- 03Fuse on the DC link blown (DC link voltage insufficient).
- 04Open phase in converter main-circuit input (PSM alarm mirrored)
- 06Temperature sensor disconnected (motor thermistor circuit open/abnormal).
- 07Excessive speed - motor exceeds 115% (standard) of maximum allowable speed.
- 09Main circuit overload / IPM overheat - heat sink of SPM overtemperature. Issued on SPM-15i and larger; SPM-2.2i to 11i report alarm 12 for the same condition.
- 10Control power supply voltage decreased
- 11DC link overvoltage reported on SPM; actual source normally the PSM/converter.
- 12DC link overcurrent / IPM alarm - excessively large current flowed into the DC link of the main circuit; on SPM-2.2i to 11i indicates main-circuit IPM detected overcurrent/overload.
- 13CPU internal RAM error
- 14Amplifier ID data inconsistent with software series/edition
- 15Spindle/output switching sequence error
- 17Amplifier ID data error
- 18Program sum check error - SPM control software checksum failure.
- 19Excessive offset of the phase U current detection circuit.
- 20Excessive offset of the phase V current detection circuit.
- 21Position sensor polarity setting incorrect
- 22Overcurrent exceeding amplifier time rating
- 24Serial transfer data error between CNC and spindle amplifier module.
- 27Position coder disconnected - alpha position coder (spindle encoder) signal lost.
- 29Short-period overload - excessive load (standard: load meter 9V) applied continuously beyond set period (default 30 s).
- 30Overcurrent in converter input circuit (PSM alarm mirrored)
- 31Motor lock alarm - motor failed to rotate as commanded; stopped or turning very slowly.
- 32Serial communication LSI RAM error.
- 33DC link precharge failure (main capacitor not recharged in time) - reported on SPM, source is converter.
- 34Parameter data out of allowable range
- 36Error counter overflow
- 37Motor not decelerated/stopped after emergency stop
- 50Spindle synchronization calculation value excessive
- 51DC link undervoltage reported on SPM; actual source normally the converter.
- 52, 53ITP synchronization signal stopped (I / II)
- 54Motor current overload (long-duration)
- 55Switching request/state mismatch during motor activation
- 56Internal cooling fan for the control circuit section stopped.
- 57Excessive deceleration power in PSM (mirrored)
- 58Converter main circuit overload (PSM heat sink overtemperature mirrored onto SPM).
- 59Converter (PSM) control-circuit cooling fan stopped - mirrored status.
- 66Communication error between spindle amplifiers (JX4)
- 73Motor sensor disconnected - MZi/BZi spindle motor sensor signal lost.
- 88Cooling fan of the radiator (external cooling circuit) stopped.
- 89Submodule SM (SSM) error
- 90Unexpected rotation detected
- 91Magnetic pole position count miss
- 92Velocity-command-dependent overspeed
- AProgram ROM error - control program not running / exception detected while running.
- A1, A2Program ROM error during control execution
30i/31i/32i system alarm
- 103DRAM SUM ERROR
- 114FSSB DISCONNECTION (MAIN -> AMP1)
- 129ABNORMAL POWER SUPPLY (AMPn)
- 195I/O LINK ALARM
- 196PMC WATCH DOG ALARM
- 198SOFTWARE SYSTEM ERROR
- 401EXTERNAL BUS INVALID ADDRESS
- 403S-BUS TIMEOUT ERROR
- 404ECC UNCORRECTABLE ERROR
- 423DSP DETECT ERROR
- 430SERVO DMA BUS PARITY ERROR
- 441TIME OUT ERROR (FROM)
- 447HSSB COMMUNICATION ERROR (CH2)
- 454SYSTEM OVERHEAT (CONTROL UNIT) AND SHUTDOWN
- 500SRAM DATA ERROR (SRAM MODULE)
- 502NOISE ON POWER SUPPLY
battery/memory alarm
display/unit alarm
system alarm
- 900ROM PARITY
- 910SRAM PARITY : (BYTE 0)
- 911SRAM PARITY : (BYTE 1)
- 912DRAM PARITY : (BYTE 0)
- 913DRAM PARITY : (BYTE 1)
- 914DRAM PARITY : (BYTE 2)
- 915DRAM PARITY : (BYTE 3)
- 916DRAM PARITY : (BYTE 4)
- 917DRAM PARITY : (BYTE 5)
- 918DRAM PARITY : (BYTE 6)
- 919DRAM PARITY : (BYTE 7)
- 920SERVO ALARM (1-4 AXIS)
- 921SERVO ALARM (5-8 AXIS)
- 926FSSB ALARM
- 930CPU INTERRUPT
- 935SRAM ECC ERROR
- 940PCB INSTALLATION ERROR
- 941MEMORY PCB CONNECTION ERROR
- 945SERIAL SPINDLE CONFIGURATION ERROR
- 946SECOND SERIAL SPINDLE COMMUNICATION IMPOSSIBLE
- 950PMC SYSTEM ALARM (PCxxx YYYYYYYYYYYY)
- 951PMC WATCH DOG ALARM (NC)
- 960SUB CPU ERROR / DC24V POWER OFF
- 972NMI OCCURRED IN OTHER MODULE
- 976L-BUS ERROR
- 998ROM PARITY