Control TechniquesFault codes
Commander SE fault codes
Every trip a Control Techniques Commander SE can display, listed by the trip number in parameter 10.20, with the condition and the usual causes. Taken from the Commander SE Advanced User Guide.
Commander SE trip table
Listed by the trip number shown in parameter 10.20. The Commander SE uses a shorter trip set than the Unidrive, so several numbers in the range are unused rather than missing from the drive.
| Trip no. | Display | Meaning |
|---|---|---|
| Main drive trips | ||
| 1 | UU | DC link under voltage — low AC supply voltage, or low DC link voltage when supplied from an external DC power supply. Only stored in the trip log if it occurs while running |
| 2 | OU | DC link over voltage — excessive inertia in the machine during deceleration, or a deceleration rate set too fast for the inertia of the machine |
| 3 | OI.AC | AC instantaneous over current — insufficient ramp times, a phase to phase or phase to earth short at the drive output, or an autotune needed after a motor or cable change. Cannot be reset for 10 seconds |
| 4 | OI.br | Over current in the braking IGBT — excessive current in the braking resistor, or a braking resistor value too small. Does not apply to size 1 units. Cannot be reset for 10 seconds |
| 6 | Et | External trip — a digital input programmed as external trip has opened |
| 7 | O.SP | Over speed — excessive motor speed, typically the mechanical load driving the motor, or a standard ramp voltage set too low (Pr 2.08) |
| 18 | tunE | Auto-tune failure — the motor is loaded, or no motor is connected |
| 19 | It.br | I²t on the braking resistor — excessive braking resistor energy. Does not apply to size 1 units |
| 20 | It.AC | Motor overload on current x time — too much mechanical load, or a high impedance phase to phase or phase to earth short at the drive output |
| 21 | Oht1 | Overheat from the drive thermal model |
| 22 | Oht2 | Overheat from the heatsink thermistor — 95 °C (203 °F) reached, 100 °C (212 °F) on size 4 |
| 24 | th | Over temperature from the motor thermistor — excessive motor temperature |
| 26 | O.Ld1 | +24 V or digital output overload — short circuit or excessive load on the +24 V output. The enable/reset terminal will not reset this trip; use the stop/reset key |
| 28 | cL | Current loop loss on terminal 5 — input current below 3 mA when the input is set for 4-20 mA or 20-4 mA |
| 30 | SCL | User serial communications watchdog failure — loss of serial communications between the drive and the master |
| 31 | EEF | Failure of the internal EEPROM — possible loss of parameter values from corruption or severe electrical noise. Load default parameters (Pr 11.43) and re-enter the set-up |
| 32 | PH | Phase loss — one of the input phases has become disconnected. Applies to 200 V and 400 V three phase units, not dual rated units |
| 33 | rS | Stator resistance measurement failure — motor cable disconnected during the measurement, or a motor too small for the drive (Pr 5.12) |
| User and option trips | ||
| 40 – 99 | trxx | User trips, raised over serial comms by writing the trip code to Pr 10.38 |
| 180 | F.bus | Field bus disconnection whilst in use — the drive has lost the field bus it was being controlled over |
| 182 | C.Err | Quickey memory corrupt — bad connection between the key and the drive, or corrupted memory |
| 183 | C.dat | Quickey with no data — a new or empty Quickey is being read, or the key software does not match the drive |
| 185 | C.Acc | Quickey write fail — bad connection or a faulty Quickey |
| 186 | C.rtg | Quickey voltage rating change — a Quickey already programmed for another rating has been read by the drive |
| 188 | O.Ld2 | +28 V serial communications power supply overload — more than 110 mA drawn, or a short circuit on the +28 V serial comms supply |
| 189 | O.cL | Current loop input overload — input current has exceeded 25 mA |
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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Commander SE tripping?
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