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T20P/T40 "Delivery pump # ESC error” or “Pump # Voltage Too Low”
T20P/T40 "Delivery pump # ESC error” or “Pump # Voltage Too Low”
Danny Fobian avatar
Written by Danny Fobian
Updated over a month ago

Possible Causes:

  1. The pump might be clogged and is not able to spin

  2. Bad pump motor

  3. Wire Harness to the pump went bad or corroded

  4. Spray Board that is located on the back of the spray tank is bad

  5. Main wire from the drone to spray board went bad or corroded

Troubleshooting Steps:

  1. Make sure the pump(s) are not clogged, this can be done by disassembling the pump and inspecting the impeller

  2. Check wiring for corrosion and make sure all wiring are fully plugged in

  3. If you have multiple drones, try swapping the full tank assembly with another drone to determine if the issue is with the tank or the drone. If the problem persists after swapping the tank, proceed to step 5C. If the issue is resolved, continue to step 3 to troubleshoot the tank

  4. If only ONE pump is having this issue:

    1. Swap the wiring from the other pump to faulty pump to see if its the pump motor

      1. If the pump doesn't work, replace Impeller Pump Motor

      2. If faulty pump does work, then the pump is not the issue. Next try to replace Impeller Pump Signal Cable.

    2. If replacing the Impeller Pump Signal Cable does not fix issue, next would be to replace Spraying Adapter Module, this is located on the back side of the spray tank.

    3. If replacing Spraying Adapter Module does not fix issue, next replace Spraying Signal Cable

  5. If BOTH pumps are having this same issue:

    1. You can start by replacing the Impeller Pump Signal Cable.

    2. If impeller pump signal cable doesn't fix issue, next replace Spraying Adapter Module

    3. If Spraying Adapter Module doesnt fix issue replace Spraying Signal Cable.

    4. If Spraying Signal Cable does not fix issue, then problem is with the drone and not spray tank

      1. Will need to replace the Spraying Module and/or Cable Distribution Board Module

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