Control TechniquesFault codes
Mentor MP fault codes
Every trip a Control Techniques Mentor MP DC drive can display, listed by the trip number in parameter 10.20, with what each one means. Taken from the Mentor MP User Guide, chapter 13 Diagnostics.
Mentor MP trip table
Listed by the trip number shown in parameter 10.20 and in the trip log. Numbers reserved for user trips are shown as ranges, because the drive reports them as t040 to t089 and similar rather than as named trips.
| Trip no. | Display | Meaning |
|---|---|---|
| Main drive trips | ||
| 1 | UV | The drive is running from the external 24 V supply, so the armature supply is not present. Self-resetting when the main supply returns |
| 3 | AOC | Instantaneous output over current — peak output current greater than 225%. Check the armature cabling for a short circuit, the motor insulation, and the current loop stability |
| 5 | PS | Internal power supply fault — remove any Solutions Module and try a reset before treating it as a drive fault |
| 6 | Et | External trip from the input on terminal 31 |
| 7 | O.SPd | Motor speed has exceeded the over speed threshold |
| 8 | PS.10V | 10 V user power supply current greater than 10 mA — too much load on the 10 V reference |
| 9 | PS.24V | 24 V internal power supply overload |
| 11 | tunE1 | The position feedback did not change, or the required speed could not be reached, during the inertia test (Pr 5.12) |
| 12 | tunE2 | Position feedback direction incorrect, or the motor could not be stopped, during the inertia test |
| 13 | tunE3 | Field flux has not decayed to zero during autotune |
| 14 | tunE4 | Back emf detected during autotune — the motor was still spinning when a static autotune was carried out |
| 15 | tunE5 | No field current detected during autotune |
| 16 | tunE6 | Cannot achieve a quarter of rated back emf during autotune — reset Pr 5.70 to the nameplate value and re-autotune the motor |
| 17 | tunE7 | A rotating autotune was requested while the drive is using estimated speed feedback |
| 18 | tunE | Autotune stopped before completion |
| 20 | It.AC | I²t on drive output current (Pr 4.16) — the motor has been overloaded for too long |
| 21 | O.ht1 | Drive over temperature at the thyristor junction, based on the thermal model |
| 22 | O.ht2 | Heatsink over temperature — check the cubicle fans, filters and airflow path |
| 24 | th | Motor thermistor trip — motor over temperature, or a break in the thermistor circuit |
| 25 | thS | Motor thermistor short circuit — check the thermistor wiring and replace the device if faulty |
| 26 | O.Ld1 | Digital output overload — total current drawn from the 24 V supply and the digital outputs exceeds 200 mA |
| 27 | O.ht3 | External discharge (braking) resistor over temperature |
| 28 | cL2 | Analogue input 2 current loss in current mode — check the 4-20 mA signal on terminal 7 |
| 29 | cL3 | Analogue input 3 current loss in current mode — check the 4-20 mA signal on terminal 8 |
| 30 | SCL | Drive RS485 serial comms loss to the remote keypad |
| 31 | EEF | EEPROM data corrupted — the drive drops into open loop and the RS485 port times out with a remote keypad fitted. Clear by loading defaults and saving |
| 34 | PAd | Keypad has been removed while the drive is taking its speed reference from the keypad |
| 35 | CL.bit | Trip initiated from the control word (Pr 6.42) |
| 36 | SAVE.Er | User save parameters in the EEPROM are corrupt |
| 37 | PSAVE.Er | Power-down save parameters in the EEPROM are corrupt |
| User and onboard PLC trips | ||
| 40 – 89 | t040 – t089 | User trips raised by an onboard PLC or Solutions Module program |
| 90 | UP div0 | Onboard PLC program attempted to divide by zero |
| 91 | UP PAr | Onboard PLC program attempted to access a parameter that does not exist |
| 92 | UP ro | Onboard PLC program attempted to write to a read-only parameter |
| 93 | UP So | Onboard PLC program attempted to read a write-only parameter |
| 94 | UP ovr | Onboard PLC program attempted an out of range parameter write |
| 95 | UP OFL | Onboard PLC variables and function block calls are using more than the allowed RAM — stack overflow |
| 96 | UP uSEr | Onboard PLC program requested a trip |
| 97 | UP udF | Onboard PLC program raised an undefined trip |
| 98 | UP ACC | Cannot access the onboard PLC program file on the drive |
| 99 | t099 | User trip defined in the 2nd processor Solutions Module code |
| 101 | t101 | User trip |
| 112 – 156 | t112 – t156 | User trips |
| Field, feedback and phase trips | ||
| 157 | F.OVL | Field I²t overload — the field supply has been overloaded for too long. Check the field resistance and the field current setting |
| 158 | AOP | Voltage has been applied to the armature but no current feedback has been detected — check the armature circuit and the current feedback device |
| 159 | FbL | No feedback from the tachogenerator or encoder |
| 160 | Fbr | The polarity of the feedback tachogenerator or encoder is incorrect |
| 168 | FdL | No current in the field supply circuit |
| 169 | FOC | Excess current detected in the field current feedback — maximum feedback present with the firing angle fully phased back |
| 170 | SL | AC input phase loss — one or more supply phases open circuit |
| 171 | S.OLd | The maximum power the over voltage suppressor can handle has been exceeded |
| 172 | S.OV | Excessive suppressor voltage — check the supply voltage and the suppressor itself |
| 173 | th.Err | Thyristor missing — hardware fault, return the drive to the supplier |
| 174 | PLL Err | Phase lock loop cannot lock to the auxiliary supply — check that the auxiliary supply is stable |
| SMARTCARD trips | ||
| 175 | C.Prod | SMARTCARD trip: the data blocks on the card are not compatible with this drive |
| 177 | C.Boot | SMARTCARD trip: a menu 0 parameter change cannot be saved because the required file has not been created on the card |
| 178 | C.bUSY | SMARTCARD trip: the card cannot perform the function because a Solutions Module is accessing it |
| 179 | C.Chg | SMARTCARD trip: the data location already contains data — erase it or use another location |
| 180 | C.Optn | SMARTCARD trip: the Solutions Modules fitted to the source and destination drives are different |
| 181 | C.RdO | SMARTCARD trip: the card has the read only bit set |
| 182 | C.Err | SMARTCARD trip: the data on the card is corrupted |
| 183 | C.dat | SMARTCARD trip: the data location does not contain any data |
| 184 | C.FULL | SMARTCARD trip: the card is full |
| 185 | C.Acc | SMARTCARD trip: read/write fail — the drive cannot communicate with the card |
| 186 | C.rtg | SMARTCARD trip: the voltage or current rating of the source and destination drives are different |
| 187 | C.Typ | SMARTCARD trip: the parameter set on the card is not compatible with the drive |
| 188 | C.cpr | SMARTCARD trip: the values in the drive and in the data block on the card are different |
| Encoder trips | ||
| 189 – 191 | EnC1 – EnC3 | Drive encoder trips: power supply overload, wire break, and encoder overload |
| 197 – 198 | EnC9 – EnC10 | Encoder trips: position feedback selected from a Solutions Module slot with no feedback module fitted, and termination overload |
| 199 | dESt | Two or more parameters are writing to the same destination parameter — set Pr xx.00 to 2001 and check the menus for duplication |
| Solutions Module trips | ||
| 200 – 214 | SL1.HF – SL3.dF | Solutions Module trips for slots 1 to 3: module hardware fault, watchdog time out, a fault detected by the module, module removed, and module type changed since parameters were saved |
| 215 | SL.rtd | Drive mode has changed and the Solutions Module parameter routing is now incorrect — press reset, and contact the module supplier if it persists |
| 216 | t216 | User trip |
| Hardware trips | ||
| 217 – 229 | HF17 – HF29 | Hardware trips: no comms from the power processor, bucket suppressor capacitor failure, overheat on the suppressor or snubber circuits, power stage identification error, power processor watchdog, undefined exception or level overrun, power circuit thermistor fault, incompatible power software, and an armature timing error. These cannot be reset and the drive must be repaired |
Trip strings vary slightly with software version. If your display shows something not listed here, send us a photo of the keypad and we will identify it.
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