Siemens MasterDrive MC Fault Codes
Fault codes, causes, and solutions for Siemens MasterDrive MC AC Variable Frequency Drive.
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Siemens MasterDrive MC AC Variable Frequency Drive Fault Codes
F001
Main contactor checkback
F002
Pre-charging fault
F006
DC link overvoltage
F008
DC link undervoltage
F011
Overcurrent
F015
Motor blocked
F017
SAFE OFF
F020
Excess temperature of motor
F021
Motor I2t
F023
Excess temperature of inverter
F025
UCE upper switch/UCE Phase L1
F026
UCE lower switch/UCE Phase L2
F027
Pulse resistor fault / UCE Phase L3
F029
Meas. value sensing (Compact PLUS only)
F035
External fault 1
F036
External fault 2
F038
Voltage OFF during parameter storage
F040
Internal fault of sequence control
F041
EEPROM fault
F042
Time slot overflow
F043
DSP link
F044
BICO manager fault
F045
HW fault on optional boards
F046
Parameter coupling fault
F051
Encoder fault
F053
Parameter fault in follow-up task
F054
Encoder board initialization fault
F056
SIMOLINK telegram failure
F058
Parameter fault Parameter task
F059
Parameter fault after factory setting/init.
F060
MLFB is missing during initial loading
F061
Incorrect parameterization
F063
PIN is missing
F065
SCom telegram failure
F070
SCB initialization fault
F072
EB initialization fault
F073
AnInp1SL1 (not Compact PLUS)
F074
AnInp2 SL1 (not Compact PLUS)
F075
AnInp3 SL1 (not Compact PLUS)
F076
AnInp1 SL2 (not Compact PLUS)
F077
AnInp2 SL2 (not Compact PLUS)
F078
AnInp3 SL2 (not Compact PLUS)
F079
SCB telegram failure (not Compact PLUS)
F080
TB/CB initialization fault
F081
OptBrdHeartbeat-Counter
F082
TB/CB telegram failure
F085
Add. CB initialization fault
F087
SIMOLINK initialization fault
F099
Friction characteristic record
F109
Mld R(L)
F111
Mld DSP
F112
MId X(L)
F114
Mld OFF
F116
Technology board fault (not Compact PLUS)
F117
Technology board fault
F118
Technology board fault (not Compact PLUS)
F119
Technology board fault (not Compact PLUS)
F120
Technology board fault (not Compact PLUS)
F121
Technology board fault (not Compact PLUS)
F122
Technology board fault (not Compact PLUS)
F123
Technology board fault (not Compact PLUS)
F124
Technology board fault (not Compact PLUS)
F125
Technology board fault (not Compact PLUS)
F126
Technology board fault (not Compact PLUS)
F127
Technology board fault (not Compact PLUS)
F128
Technology board fault (not Compact PLUS)
F129
Technology board fault (not Compact PLUS)
F130
Technology board fault (not Compact PLUS)
F131
Technology board fault (not Compact PLUS)
F132
Technology board fault (not Compact PLUS)
F133
Technology board fault (not Compact PLUS)
F134
Technology board fault (not Compact PLUS)
F135
Technology board fault (not Compact PLUS)
F136
Technology board fault (not Compact PLUS)
F137
Technology board fault (not Compact PLUS)
F138
Technology board fault (not Compact PLUS)
F139
Technology board fault (not Compact PLUS)
F140
Technology board fault (not Compact PLUS)
F141
Technology board fault (not Compact PLUS)
F142
Technology board fault (not Compact PLUS)
F143
Technology board fault (not Compact PLUS)
F144
Technology board fault (not Compact PLUS)
F145
Technology board fault (not Compact PLUS)
F146
Technology board fault (not Compact PLUS)
F147
Technology board fault (not Compact PLUS)
F148
Fault 1 Function blocks
F149
Fault 2 Function blocks
F150
Fault 3 Function blocks
F151
Fault 4 Function blocks
F244
ParaLink int. (Compact PLUS only)
F255
Fault in EEPROM
A001
Time slot overflow
A002
SIMOLINK start alarm
A003
Drive not synchronous
A005
Couple full
A014
Simulation active alarm
A015
External alarm 1
A016
External alarm 2
A017
SAFE OFF alarm active
A018
Encoder adjustment
A019
Encoder data serial protocol
A020
Encoder adjustment, external encoder
A021
Encoder data of external multiturn encoder faulty
A022
Inverter temperature
A023
Motor temperature
A025
I2t converter
A029
I2t motor
A033
Overspeed
A034
Setpoint/actual value deviation
A036
Brake checkback "Brake still closed"
A037
Brake checkback "Brake still open"
A042
Motor stall/block
A049
No slave (not Compact PLUS)
A050
Slave incorrect (not Compact PLUS)
A051
Peer baud rate (not Compact PLUS)
A052
Peer PcD L (not Compact PLUS)
A053
Peer Lng f. (not Compact PLUS)
A057
TB Param (not Compact PLUS)
A061
Alarm 1 Function blocks
A062
Alarm 2 Function blocks
A063
Alarm 3 Function blocks
A064
Alarm 4 Function blocks
A072
Frict Char Init
A073
Interr InitFric
A074
Incompl FricChar
A075
No description available
A078
Stands. Meas
A081
CB alarm
A082
CB alarm
A083
CB alarm
A084
CB alarm
A085
CB alarm
A086
CB alarm
A087
CB alarm
A088
CB alarm
A089
CB alarm
A090
CB alarm
A091
CB alarm
A092
CB alarm
A093
CB alarm
A094
CB alarm
A095
CB alarm
A096
CB alarm
A097
TB alarm 1 (not Compact PLUS)
A098
TB alarm 1 (not Compact PLUS)
A099
TB alarm 1 (not Compact PLUS)
A100
TB alarm 1 (not Compact PLUS)
A101
TB alarm 1 (not Compact PLUS)
A102
TB alarm 1 (not Compact PLUS)
A103
TB alarm 1 (not Compact PLUS)
A104
TB alarm 1 (not Compact PLUS)
A105
TB alarm 1 (not Compact PLUS)
A106
TB alarm 1 (not Compact PLUS)
A107
TB alarm 1 (not Compact PLUS)
A108
TB alarm 1 (not Compact PLUS)
A109
TB alarm 1 (not Compact PLUS)
A110
TB alarm 1 (not Compact PLUS)
A111
TB alarm 1 (not Compact PLUS)
A112
TB alarm 1 (not Compact PLUS)
A113
TB alarm 2 (not Compact PLUS)
A114
TB alarm 2 (not Compact PLUS)
A115
TB alarm 2 (not Compact PLUS)
A116
TB alarm 2 (not Compact PLUS)
A117
TB alarm 2 (not Compact PLUS)
A118
TB alarm 2 (not Compact PLUS)
A119
TB alarm 2 (not Compact PLUS)
A120
TB alarm 2 (not Compact PLUS)
A121
TB alarm 2 (not Compact PLUS)
A122
TB alarm 2 (not Compact PLUS)
A123
TB alarm 2 (not Compact PLUS)
A124
TB alarm 2 (not Compact PLUS)
A125
TB alarm 2 (not Compact PLUS)
A126
TB alarm 2 (not Compact PLUS)
A127
TB alarm 2 (not Compact PLUS)
A128
TB alarm 2 (not Compact PLUS)
A129
Axis does not exist - machine data 1 = 0
A130
Operating conditions do not exist
A131
OFF1 missing
A132
OFF2 missing
A133
OFF3 missing
A134
Enable Controller ENC missing
A135
Actual position value not o.k
A136
Machine data 1 changed - RESET necessary
A137
Axis assignment incorrect
A138
Axis assignment of roll feed incorrect
A140
Following error in standstill
A141
Following error in motion
A142
In position - timer monitoring
A145
Actual-value disable not allowed - axis standstill
A146
Direction of movement not allowed
A148
Deceleration = 0
A149
Distance to go negative
A150
Slave axis already allocated to other master axis
A151
Slave axis operating mode not allowed
A152
Slave axis operating mode changed
A153
Error in slave axis
A154
Follow-up mode in slave axis active
A155
Reset in slave axis active
A156
Axis type (MD1) of slave axis not allowed
A160
Setup speed = 0
A161
Reference approach velocity = 0
A162
Reference point - reducing velocity = 0
A165
MDI block number not allowed
A166
No position has been programmed in MDI mode
A167
No velocity has been programmed in MDI mode
A168
G91 not allowed with MDI on the fly
A169
Start conditions for flying MDI do not exist
A170
Single block mode block does not exist
A172
Program with this number does not exist
A173
Program number not allowed
A174
Program number changed during traversing
A175
No block end programmed
A177
Prog. number of block search forwd. does not exist
A178
Program number of block search forward not allowed
A179
Prog.No.of block srch fwd level 1/2 does not exist
A180
Prog.no. of block search forward level 1 <> cmd.
A181
Prog.no. of block search forward level 2 <> cmd.
A183
Block no. of block search fwd l. 0 does not exist
A184
Block no. of block search forward is no UP call
A185
Block no. of block search forward does not exist
A186
Block no of block search fwd level 1 is no UP call
A187
Block no. of block search forward does not exist
A188
Remaining no of loops block search fwd not allowed
A190
Digital input not programmed
A191
Digital input not actuated
A195
Negative overtravel reached
A196
Positive overtravel reached
A200
No position has been programmed in Automatic mode
A201
No velocity has been programmed in Automatic mode
A202
Axis unknown
A203
1st G-function not allowed
A204
2nd G-function not allowed
A205
3rd G-function not allowed
A206
4th G-function not allowed
A208
D-number is not allowed
A210
Interpolation of 3 axes not allowed
A211
Shortest distance G68 and G91 not allowed
A212
Special function and axis combination not allowed
A213
Multiple D-number not allowed
A214
Multiple acceleration behaviour not allowed
A215
Multiple special functions not allowed
A216
Multiple block transition not allowed
A217
Multiple axis programming not allowed
A218
Multiple path condition not allowed
A219
Multiple dimensions specification not allowed
A220
Multiple zero offset selection not allowed
A221
Multiple tool offset selection not allowed
A223
Subprogram number does not exist
A224
Subprogram nesting depth not allowed
A225
Status of collision monitoring select. not allowed
A227
Negative overtravel violated
A228
Positive overtravel violated
A241
Table assignment changed
A242
Table 1 invalid
A243
Table 2 invalid
A244
Travel table 3 not valid
A245
Travel table 4 not valid
A246
Travel table 5 not valid
A247
Travel table 6 not valid
A248
Travel table 7 not valid
A249
Travel table 8 not valid
FF01
Time slot overflow
FF03
Access fault Optional board
FF04
RAM
FF05
EPROM fault
FF06
Stack overflow
FF10
No description available
FF13
Wrong firmware version (Compact PLUS only)
FF14
FF processing
FF15
CSTACK_OVERFLOW
About Drive Fault Codes
Both AC Variable Frequency Drives (VFDs) and DC Drives display fault codes when they encounter operational issues. These codes help technicians diagnose and resolve problems quickly. This tool provides fault codes, descriptions, causes, and solutions for various drive manufacturers and models.
If you can't find your specific drive model or the fault code you're experiencing, please refer to the manufacturer's documentation or contact technical support.
Understanding Drive Fault Codes
What are Drive Fault Codes?
Drive fault codes are diagnostic messages displayed by AC and DC drives to indicate specific errors or malfunctions. These codes are essential for troubleshooting and maintaining industrial motor control systems. Each manufacturer uses unique code formats, but they generally point to similar issues like overvoltage, undervoltage, overcurrent, overheating, or communication failures.
Common Drive Types
AC Variable Frequency Drives (VFDs)
VFDs control AC motors by adjusting frequency and voltage to regulate motor speed and torque. They are widely used in applications requiring variable speed control with energy efficiency.
- Control both speed and torque
- Energy-efficient operation
- Smooth acceleration/deceleration
- Regenerative braking capabilities
DC Drives
DC drives control DC motors by adjusting the armature voltage and sometimes the field current. They excel in applications requiring high starting torque and precise speed control.
- High starting torque
- Simple control architecture
- Wide speed range control
- Quick response to command changes
Common Drive Fault Categories
Power-Related Faults
- Input phase loss
- Overvoltage during acceleration/deceleration
- Undervoltage conditions
- DC bus voltage issues
Thermal Faults
- Drive overheating
- Motor overtemperature
- Heatsink thermal issues
- Cooling system failures
Communication Faults
- Fieldbus communication errors
- Serial communication timeout
- Network connection issues
- Protocol compatibility problems
Motor/Load Faults
- Motor overload
- Output phase loss
- Overcurrent during acceleration
- Ground/earth faults
Troubleshooting Best Practices
When troubleshooting drive fault codes, always follow these best practices:
- Document the exact fault code and conditions when it occurred
- Check for simple issues first (loose connections, overloaded motor)
- Verify input power quality and stability
- Inspect the motor and load for mechanical issues
- Examine environmental conditions (temperature, humidity, dust)
- Consult manufacturer documentation for specific guidance
Popular Drive Manufacturers
Our database includes fault codes from leading drive manufacturers including:
- ABB
- Siemens
- Allen Bradley / Rockwell Automation
- Schneider Electric
- Danfoss
- Yaskawa
- Mitsubishi Electric
- Eaton
- Emerson
- Fuji Electric
For additional resources on drive maintenance and troubleshooting, check out our Drive Maintenance Guide and Motor Sizing Calculator.