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Hi Dave,
I think from what I’ve seen that the timer board is the problem and since I’ve found another similar one for £50 I don’t think it’s worth carrying on with it.
Thanks very much for your help – it is appreciated.Yes that was the first thing I did really. Mains on the relay terminal all the time (looks like it comes from the main switch area) and probably through the relay onto terminals 2/3 of the motor so that’s there all the time. The grey wire on terminal 1 comes from the control board and never has any voltage on it.
I connected up the 2 white wires but not the grey, waited till the pump should be on and very carefully touched a wire from neutral to terminal 1 and nothing happens.OK, that looks sensible for the motor.
So the relay terminal, the one on it’s own not connected to the motor seems to be connected to a wire that is permanently live.
The wire on terminals 2/3 seems to be connected to that via the relay.
The grey wire on terminal 1 comes from the control board and has no volts on it at all.Do you know which terminal is wrong voltage and what needs to change to get the motor to run? I’m confused?
The grey wire goes up to the control board where it is connected to some sort of switching device – transistor or whatever. This looks in perfect condition but could be the problem.
The relay terminal seems to be permanently live with a wire from the main switch. Putting mains on the relay terminal puts mains onto 2/3 (either through the relay or through the motor). Pin 1 never seems to have any volts on it.
Sorry! I’ll try and clarify.
I havent been able to get the relay off the motor and when I say Relay terminal – 1 I mean resistance between the relay terminal that connects to the white wire to motor terminal 1. So all the numbers are the motor terminal numbers and Relay terminal refers to the relay terminal that isn’t connected to the motor.
All the wires are disconnected.
Does that help?OK – I’m back on the case!
You made me think about the ohm scales and I tried again using the 200 ohm scale and now I also get:
1 – 2/3 is 34 ohms
Relay terminal – 1 34 ohms
Relay terminal – 4 22 ohms
Relay terminal – 2/3 0.2 ohmsDoes that look right for the motor?
I have a couple of readings from the motor with the relay still on.
1 – 4 (the 2 right hand terminals) 11.7 ohms
1 – 2/3 open circuit
Relay terminal – 4 open circuit
Relay terminal – 2/3 open circuit
Relay terminal – 1 open circuit
Does that tell you anything?
I’m going to be away for a few days now so won’t be able to do anything else till the weekend.I have to confess I’m struggling to remove the relay. I think it’s just the clips on the terminals and I found those difficult enough when I could see them. This is behind the relay and I’m working blind. Not enough space to get a long nose pliers in there and my fingers are a bit too long to get into the right position. I could just force it but would risk breaking the motor terminal or the relay.
The terminal on the black relay that connects to the white wire seems permanently connected to terminals 2 & 3 (these are the ones connected together on the motor). If I measure resistance from the black relay terminal to terminal 4 on the motor it reads open circuit but if I use the buzzer on the meter it buzzes as a connection. Not sure what that means?
The black relay gets warm when the machine is running even now when the motor isn’t working.The white wire attached to the terminal on that black relay seems permanently connected to terminals 2 & 3 on the motor. These are the 2 terminals that are connected together at the motor.
If I measure resistance between the terminal on the black relay and terminal 4 it measures open circuit but if I use the buzzer on the meter it buzzes out as short. Not sure what that means?
The black box gets warm when the machine is running even though the motor itself isn’t running.Although the motor has 4 terminals, two of them are connected together so it’s effectively 3 terminal. There are only 3 wires to it.
With all the wires disconnected but still with the black box connected the only meaningful reading I got was about 2 ohms between terminals 1 & 4 which are next to each other on the right hand side. The black/grey wire we’ve been following is connected to terminal 1.
