For some reason my PB smoke pump has stopped working and I'm having trouble re-programming it. I have it with +100% as the 'on' setting and -100% as the 'off' position on a Tx switch and using a seperate dedicated pump battery. Unfortunately I cannot get the pump to turn. As I turn on I get a few beeps then a green light but whatever I do with the switch nothing else happens. I've checked the rx signal output with a servo and that works ok. I've also tried moving the switching points.

It worked perfectly last time I used it and it is not seized.

Any ideas for re-programming appreciated.

Rob.