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Pro-160 / 360 Fault Codes
The Pro-160 and Pro-360 have a number of warning messages or error codes that can appear depending on what the controller thinks is happening.
This table lists;
- the code
- any associated sound signal
- whether the code is a warning or indicates a fault
- the text shown on the display
- the behaviour of the controller
| Code | Sound [No of beeps in 5 secs] | Type Fault/ Warning | Error Text
| Error Description | Behaviour |
| B1 | 2 short | W | Under Voltage | The battery voltage has gone below the Low Voltage cut-off (if set) or 11V (system default). | Start-up – Do not start Run-time – Ramp down |
| B2 | 2 short | W | Low Battery | The battery voltage has gone below the low voltage alert (if set) or 11.9 (system default). | Depends on profile setting (volt_alert.action) |
| B3 | None | W | High Battery | The battery voltage is above: 60V (Std PRO-160) 90V (HV PRO-160) | Flash warning message |
| B4 | None | F | Over Voltage | The battery voltage is above: 63V (Std PRO-160) 95V (HV PRO-160) | Start-up – Do not start Run-time – Ramp down, resume if cleared |
| L1 | None | W | Logging Error | An error has occurred when writing to the uSD card | Controller continues to run, but logging is disabled. |
| T1 | 1 long | W | High Temp | The controller temperature is over 65C | Flash warning message Run-time – ramp down to 50% of max speed (if over 50%) |
| T2 | 1 long | F | Over Temp | The controller temperature is over 75C. Also see note 4 at end. | Start-up – Do not start Run-time – Ramp down, stop |
| T3 | 1long | W | TX High Temp | The second thermistor temperature is over the warning limit. | Flash warning message
|
| T4 | 1 long | W | TY High Temp | The third thermistor temperature is over the warning limit. | Flash warning message
|
| P1 | Continuous | F | High Pot Lock | High pot lockout. Indicates the throttle input was not at zero when switched on. Either close the throttle, or increase the lockout setting in the menu. | Start -up -Flash error message until POT is set to minimum Run-time -N/A |
| P2 | 3 short | F | Pot Fault | Pot track fault. Indicates a pot or pot wiring fault. Not usually a controller issue, but see note 1 at end. | Start-up – Flash error message and switch off Run-time – Ramp down, stop |
| P3 | 3 short | F | Pot Fault | Pot wiper fault. The POT input value is higher than the expected range. Usually indicates a worn pot or faulty pot wiring. We recommend; 1] make sure software is 2.4.1 or later. 2]replace the pot. | Start-up – Flash error message and switch off Run-time – 2.4.0 & earlier, ramp down & stop. 2.4.1 onwards, ramp down, resume if fault clears. |
| P4 | 3 short | F | RC Fault | The RC signal is not in the expected range of values See note 2 at end. | Start-up – Flash error message until signal is in range. Run-time – Ramp down Restart automatically if ranges return to normal |
| P5 | 3 short | F | Limit switch | Both limit switches are being operated at the same time | Start-up – Flash error message until at least one switch is opened. Run time – ramp down. |
| P6 | 3 short | F | Volt input | If Vmode chk is enabled, this indicates an input below 0.25V or above 4.75V. Usually caused by a disconnection of the input, or a malfunction of the voltage source. | Start-up – Do not start Run-time – Ramp down, stop |
| X1 | 2 short | F | Dead Mans Hdl | The Dead Man’s handle is set on | Start-up – Flash error message until set off Run-time – Ramp down Restart automatically if DMH goes off |
| X2 | 2 short | F | Emerg Stop | Emergency stop signal received | Start-up – Flash error message until set off Run-time – STOP IMMEDIATELY |
| C1 | None | W | Over Current | Current overload occurring. The current is above the SYSTEM (hardcoded) maximum safe curent. [Note: whether it is + or – overcurrent is not information required by the user] | Flash warning message. Special behaviour, emergency stop after 300 milliseconds at this level. |
| C2 | None | W | Current Limit | Current limit. Current is being held to the current limit set for the profile | Flash warning message. |
| K1 | 2 long | F | Park Brake | Parking brake over current | Start-up – Do not start Run-time – Ramp down, stop |
| Q1-4 | 3 long | F | MOSFET | Mosfet Faults. See note 3 at end. | Start up check |
| S1 | None | W | Speed Limit | Speed limit. Speed (width of signal from speed sensor) is being held to the speed limit set for the profile | Flash warning message. |
| S2 | None | W | Speed Signal | Reading from the speed sensor is not in the expected range of values | Flash warning message |
Notes:
1. P2 Pot fault can also occur if R111 [0 ohms] is blown. This can occur if pin F is accidentally short-circuited to B+. Test for continuity between the * point and pin F. If open circuit, it can be repaired by bridging with a small wire link. In July 2026, on Rev 7 of the control board, R111 was changed to be another fuse track [F2], this makes it easier to test and repair.
2. P4 RC fault can occur if the J1 jumper is missing [just above the RDO port on the control board]. Does not apply to Rev 7 hardware onwards [30-41-07].
3. Qx faults can also be caused by;
- A short circuit between mosfets and the heatsink. Use a multi-meter set to the 200k resistance scale and measure between the heatsink and each of the B+/B-/M+/M- terminals in turn, there should be no discernible continuity. If there is then check that all the black insulating washers are in place on the mosfet mounting screws.
- We have also seen two cases of false positive Q errors that were traced to faulty battery isolator switches which had developed a slightly high resistance across the internal contacts. This was identified by temporarily bypassing the isolator.
- If a radio control receiver or servo is connected that draws too much current, this will affect the 5V supply to the microprocessor, which in turn can give a false positive Q error.
4. T2 temperature warning. In March 2023 we changed the sensor type from a PTC type to an NTC type for better accuracy. At the same time we changed the software to 2.4.3 to work with the new sensor. If the wrong variant of a new software version is installed in hardware with the older sensor then a T2 warning may occur. It can be corrected by changing the CTR Sensor setting from NTC to PTC in the Advanced settings / Temperature section of the menu, this will need to be done for each profile being used. We can supply software variants that will work correctly with the older hardware without adjustment.