Brand: ABB
Category: Power Supplies
Document Type: Manual
Language: EN
Manual for M10x
Uploaded: April 20, 2026, 7:49 p.m.
Manual Publish Date: 2021-05-01
Main Unit
The main unit is constructed with two parts: the electronics of the motor control unit and the integrated CT. Main unit is a one type device with the integrated CT range starting from 0.24 to 63A.
Operator Panel MD21/MD31
The operator panel is the user interface mounted on the front door or drawer. With control buttons, LED, LCD module (MD21 only), MD21/MD31 provides functions for motor control, supervision and parameterizing.
Analogue Output Module AO11
Analogue output module AO11 is an optional add-on module to main unit, providing one channel 0-20mA or 4-20mA analogue output.
M10x-TCP Ethernet module EM01
Ethernet module EM01 is the dedicated Modbus TCP interface to M10x-TCP. It provides two Ethernet ports.
Troubleshooting and error codes
| Condition | Description | Possible Cause | Suggested Action |
|---|---|---|---|
| Thermal Capacity Alarm | Motor is about to be stopped. the motor thermal level reaches thermal capacity level alarm level | The motor is under thermal overload condition. Unacceptable heating-up of motor winding. | Check the process conditions:> If it is extreme starting conditions, high overload or intermittent operation; Check the motor condition:> Cooling problem, ambient temperature too high; mechanical problem; Check the thermal model relevant parameters: the le setting, T6 time and ambient temperature setting, the thermal level setting etc. |
| Overload Alarm | Motor is about to be stopped. The motor is in overload condition, i.e. measured current ILmax > 1.14 x TFLC (thermal full load current multiplier reduced by motor ambient temperature) | The motor is in overload condition | Check the process conditions; Check motor load; Check parameter settings. |
| Phase Failure Alarm | Motor is about to be stopped. The maximum imblance current of any phase reaches the phase failure alarm level. | Phase failure in motor phase currents generally occurs because of pitted contacts in the contactor or SCPD, imbalance in the mains supply, loose connections, blown fuse, and faults within the motor. | Check for blown fuse Check for pitted contacts in contactor or SCPD Check for loose connection on power supply Check the motor connection |
| Phase unbalance Alarm | Motor is about to be stopped. The maximum imblance current of any phase reaches the unbalance alarm level. | phase unbalance in motor phase currents generally occurs because of pitted contacts in the contactor or SCPD, imbalance in the mains supply, loose connections, blown fuse, and faults within the motor. | Check for pitted contacts in contactor or SCPD Check for loose connection on power supply Check the motor connection |
| Underload Alarm | Motor is about to be stopped. The highest of the measured phase currents is below the alarm level. | Motor current is below the alarm setting; motor running idle, dry running pump, conveyor belt broken; fan with no air flow | Check motor load and motor / process conditions. Check parameter settings. |
| Noload Alarm | Motor is about to be stopped. The highest of the measured phase currents is below the alarm level. | Motor current is below the alarm setting; motor running idle, dry running pump, conveyor belt broken; fan with no air flow | Check motor load and motor process conditions. Check parameter settings. |
| Earth Fault Alarm | Motor is about to be stopped. Residual current for cable(s), motor and connection box above alarm level. Measured Earth Fault Current exceeds above the Alarm level | Insulation problems for cable(s), motor and connection box or reduced insulation strength due to extreme ambient conditions. | Check parameter settings. Check Earthing system. Check motor or connected load. |
| PTC Alarm * | Motor is about to be stopped. The resistance corresponding to the high temperature at one or more of the thermistors exceeds alarm level | Excessive temperature rise in the windings and reaches alarm level | Check motor environmental and load condition Check parameter settings. |
| Undervoltage Alarm * | Motor is about to be stopped. The lowest of the measured voltages is below the alarm level. | Voltage dip below the alarm level | Check parameter settings. Check main supply |
| Autoreclose Alarm * | Motor is about to be restart after the voltage dip | Voltage dip is measured and the autorestart function is active | N/A |
| Feedback Alarm | Motor is about to be stopped. Contactor feedback or current feedback is not as expected. | Contactor feedback is not detected or the current is not measured during motor starting or running. | Check for loose connection of contactor feedback Check for contactor control Check motor load and motor process condition |
| Welded Contactor Alarm | Motor is stopped. Contactor feedback is not as expected. | Contactor welded fault | Check parameter settings.Check contactors Check motor |
| PTC short circuit * | The resistance of PTC input is lower than the alarm level | PTC short circuit | Check parameter settings. Check PTC wiring between motor and relay |
| PTC open circuit * | The resistance of PTC input exceeds 12ΚΩ | PTC open circuit | Check parameter settings. Check PTC wiring between motor and relay |
| Start limitation Alarm | Motor is about to be stopped and one more start is allowed | motor starts too frequent | Check parameter settings. |
| Serial Communication Alarm | Before the permitted time delay elapse, M10x considers loss of communication | communication interruption between m10x and upper control system | Check parameter settings. Check network interface |
| Running time Alarm | The Running timer exceeds the preset running time alarm level | This helps to lubricate and maintain the bearings of the motor within the correct service interval | Check parameter settings. Check motor |
| Start number Alarm | The start counter exceeds the set value of cycles in preset start number alarm level | This help in carrying out preventive maintenance of power contacts. | Check parameter settings. Check contactors |
| DIx Alarm | Motor is about to stop if the DIx changes status from healthy to unhealthy during running Motor is prevented from starting if the Dlx input is unhealthy. | The process interlock1 switch remain inactive on the occurrence of a motor start or the process interlock2 switch remain active when motor is in running. | Check DI settings on process interlock. Check Dlx wirings |
| Watchdog Alarm | Internal hardware watchdog activated | Hardware fault or internal pro- gram running fault (if it is a tem- porary fault, it is recoverable after power cycling). | Check if it is recoverable (by cycling the power) Change hardware if it is not recoverable |
| No Comm | The communication between MDx display and M10x main unit is interrupted or M10x simply stops functioning. | Physical connection is damaged between MDx display and M10x. M10x is no longer in working mode. | Check if the cable connection is in good condition; Check if MDx or M10x relay is in working condition (by swapping with spares) |
| TOL Trip | Motor is stopped. The motor thermal level reaches thermal capacity trip level | The motor is under thermal overload condition. Unacceptable heating-up of motor windings. | Check the process conditions:> If it is extreme starting conditions, high overload or intermittent operation. Check the motor condition:> Cooling problem, ambient temperature too high; mechanical problem; Check the thermal model relevant parameters:> Check the le setting, T6 time and ambient temperature setting, the thermal level setting etc. |
| Stalled rotor Trip | Motor is stopped. The highest of the measured phase currents remains above the trip level for a trip delay time | The driven mechanical system from jams and excessive overloads | Check parameter settings. Check motor connected load and process condition. |
| Phase Failure Trip | Motor is stopped. the ratio between the lowest phase current to the highest phase current (ILMIN / ILMAX) from the measured currents of all three phases is below the trip level | Phase failure in motor phase currents generally occurs because of pitted contacts in the contactor or SCPD, imbalance in the mains supply, loose connections, blown fuse, and faults within the motor. | Check for blown fuse Check for pitted contacts in contactor or SCPD Check for loose connection on power supply Check the motor connection |
| Phase unbalance Trip | Motor is stopped. the ratio between the lowest phase current to the highest phase current (ILMIN / ILMAX) from the measured currents of all three phases is below the trip level | Phase failure in motor phase currents generally occurs because of pitted contacts in the contactor or SCPD, imbalance in the mains supply, loose connections, blown fuse, and faults within the motor. | Check for blown fuse Check for pitted contacts in contactor or SCPD Check for loose connection on power supply Check the motor connection |
| Underload Trip | Motor is stopped. The highest of the measured phase currents is below the trip level. | Motor current is below the alarm setting; motor running idle, dry running pump, conveyor belt broken; fan with no air flow | Check motor load and motor / process conditions. Check parameter settings. |
| Noload Trip | Motor is stopped. The highest of the measured phase currents is below the trip level. | Motor current is below the alarm setting; motor running idle, dry running pump, conveyor belt broken; fan with no air flow | Check motor load and motor process conditions. Check parameter settings. |
| Earth fault Trip | Motor is stopped. Residual current for cable(s), motor and connection box above trip level. | Insulation problems for cable(s), motor and connection box or reduced insulation strength due to extreme ambient conditions. Consider whether starpoint of IT- networks may have moved. | Check parameter settings. Check Earthing system. Check motor or connected load. |
| PTC Trip * | Motor is stopped. The resistance corresponding to the high temperature at one or more of the thermistors exceeds trip level | Excessive temperature rise in the windings | Check parameter settings. Check PTC input Check motor |
| Undervoltage Trip * | Motor is about to be stopped. The lowest of the measured voltages is below the trip level. | Voltage dip below the trip level | Check parameter settings. Check main line voltage |
| Contactor Feedback Trip | Motor is stopped. Contactor feedback is not as expected. | Contactor feedback fault | Check for loose connection of contactor feedback Check for contactor control Check motor load and motor process condition |
| Serial Communication Trip | After the permitted time delay elapse, M10x considers loss of communication and activates failsafe | communication interruption between m10x and upper control system | Check parameter settings.(change the setting to "255" will disable the communication supervision); Check network interface |
| Start limitation Trip | Motor is stopped and a new start is prevented. | The motor starts too frequent and the number of starts in a given interval is reached start limitation | Check parameter settings. |
| DIx Trip | Motor is tripped because the DIx changes status from healthy to unhealthy during running ; Motor is prevented from starting because the Dlx input is unhealthy. | The process interlock1 switch remain inactive on the occurrence of a motor start or the process interlock2 switch remain active when motor is in running. | Check DI settings on process interlock. Check Dlx wirings |
| Long start Trip | Motor is stopped. After a start signal, when the measured phase currents remain above the set value for a locked rotor delay time during the startup time | motor locked or stalled in start state and signals a fault when current continuously exceeds a separately set threshold after a start command for the same period of time. | Check parameter settings. Check motor or connected load. |
| Feeder trip | Motor is stopped because of external trip input of feeder starter type. | The input is defined as 'external trip', M10x will trip the motor after a high input is detected. | Check parameter settings. Check Digital input wiring. |
| Emergency stop trip | Motor is stopped because of emergency stop input. | The input is defined as 'emergency stop', M102 will stop or trip the motor after a high input is detected. | Check parameter settings. Check Digital input wiring. |
| External Trip | Motor is stopped because of external trip input. | The input is defined as 'external trip', M10x will trip the motor after a high input is detected. | Check parameter settings. Check Digital input wiring. |
| Main switch off trip | Motor is stopped because of main switch input. | The input is defined as 'Main switch status', M10x will trip the motor after a low input is detected. | Check parameter settings. Check Digital input wiring. |
| Current feedback trip | Motor is stopped. Current feedback is not as expected. | Current is not measured during motor starting or running. Or current is measured while starter is detected in test position. | Check parameter settings if 'soft test' is enabled. Check motor connected load and process condition. |