Back to all Fanuc models

Fanuc Alpha-i Servo Spindle Amplifier

Fanuc Alpha-i Servo Spindle Amplifier Error Codes

Complete alarm and error code reference for the Fanuc Alpha-i Servo Spindle Amplifier. Browse all 135 documented fault codes below, each linking to a detailed troubleshooting guide.

Search this section

Search Fanuc Alpha-i Servo Spindle Amplifier

Search all 135 Fanuc Alpha-i Servo Spindle Amplifier codes without changing pages.

Search all database

Complete Alarm List

Invalid digital servo parameter setting

Pulsecoder phase error (built-in)

Soft phase alarm (built-in)

LED error (built-in)

Pulse error (built-in)

Count error (built-in)

Serial data error (built-in)

Data transfer error (built-in)

LED error (separate)

Pulsecoder phase error (separate)

Count error (separate)

Pulse error (separate)

Soft phase alarm (separate)

Serial data error (separate)

Data transfer error (separate)

Sensor error (separate)

Excessive semi-full error

Servo motor overheat

Converter: main circuit overload

Converter: control power supply undervoltage

Converter: DC link undervoltage

Inverter: control power supply undervoltage

Inverter: DC link undervoltage

Soft thermal (OVC)

Converter: input circuit overcurrent

Inverter: motor current alarm

Converter: DC link overvoltage

Converter: Excessive deceleration power

Current offset error

Soft disconnection alarm

Hard disconnection alarm

Hard disconnection alarm (separate)

Feedback mismatch alarm

Inverter: IPM alarm

Inverter: DC link current alarm

Inverter: cooling fan stopped of the radiator

Communication error between amplifiers

Open phase in the converter main power supply

Excessive speed deviation

DC link fuse blown

Temperature sensor disconnected

Excessive speed

Main circuit overload/IPM overheat

Low power supply input voltage

Amplifier ID not registered

Output switching/spindle switching alarm

Amplifier ID data error

Position sensor polarity setting incorrect

Spindle amplifier current overload

Position coder disconnected

Short-period overload

Motor lock alarm

Serial communication LSI RAM error

Parameter data out of the specifiable range

Gear ratio parameter error

Error counter overflow

Speed detector parameter error

Position coder one-rotation signal detection error

Position coder one-rotation signal not detected

Position coder signal for differential speed mode disconnected

Position coder signal error

ITP signal error I

ITP signal error II

Current overload alarm

Abnormal switching status of power leads

Internal cooling fan stopped

Excessive semi-closed loop/closed loop position error alarm

Abnormal travel distance in magnetic pole determination operation

Communication alarm between spindle and amplifier

Safety speed exceeded

Abnormal axis data

Abnormal safety parameter

Motor speed mismatch

Motor sensor disconnected

Safety function not executed

Axis number mismatch

Safety parameter mismatch

Abnormal initial test operation

Destination amplifier error in inter-spindle amplifier communication

Motor sensor one-rotation signal detection error

Motor sensor one-rotation signal not detected

Motor sensor signal error

Spindle sensor disconnected

Spindle sensor one-rotation signal detection error

Spindle sensor one-rotation signal not detected

Spindle sensor signal error

Cooling fan stopped of the radiator

Sub module SM (SSM) error

Unexpected rotation alarm

Pole position count miss alarm

Velocity command-dependent overspeed alarm

Other converter alarm

Speed polarity error in torque tandem operation

Serial data error

Data transfer error

Soft phase alarm

Device communication error

Pulse error alarm

Count error alarm

Serial sensor one-rotation signal not detected

Invalid servo parameter

α Pulsecoder soft disconnection

Position sensor one-rotation signal detection error during thread cutting

Overflow of converted motor speed for differential spindle speed control

Excessive speed command calculation value in spindle synchronization

Reference position return command in the EGB mode

Communication error between amplifiers

Communication data alarm

Communication data alarm

Communication data alarm

Spindle switching circuit error

Invalid learning control velocity command

Invalid dynamic characteristic compensation degree

Invalid learning cycle

Excessive speed deviation alarm in spindle synchronization

Excessive position error alarm in spindle synchronization

Spindle adjustment function alarm