New owner of MEP 802A

[heimlich]

Yes. Does the green light above it come on when you close the circuit, or does it stay off?

I do see the green light.

 

[Light in the Dark]

So the switch is doing what its supposed to... You are going to want to take the roof off the operator cube and look at the contactor assy for loose collections, corrosion, etc. Its a known problem spot, but typically can be disassembled, deoxidezed, and made to work again (unless waters gotten in).

 

[Guyfang]

If you see the green light, then your control part of the output system is working up to the K1 output relay. So, after you take the top off, you need to check the rest of the output system. Start the set. Turn on your S5, (AC circuit interrupter switch). If the green light DS7 light, (Green light for the AC output) comes on, then measure from ground or N, to the AC input wires on K1, the then see if the output side gives you the same readings.

 

[heimlich]

Can I unplug and plug those relays while the unit is running or, do I need to turn the unit off while unplugging them.

 

[Guyfang]

Why would you want to unplug them while its running?

 

[heimlich]

Why would you want to unplug them while its running?

To see if plugging them back in does anything. Pretty standard thing to do when troubleshooting something.

 

[heimlich]

I think it's working now. I tapped the top of each of those relays and now I have 120 coming over.

 

[Guyfang]

To see if plugging them back in does anything. Pretty standard thing to do when troubleshooting something.

Wouldn't it be easier to just take them out and test them on the bench? Apply voltage, watch it work, or not work. Then use a Multi-meter to check if the contacts are properly opening and closing? Pretty standard thing to do when troubleshooting.

 

[heimlich]

Wouldn't it be easier to just take them out and test them on the bench? Apply voltage, watch it work, or not work. Then use a Multi-meter to check if the contacts are properly opening and closing? Pretty standard thing to do when troubleshooting.

That's how you would test them before you throw them out.

 

[kloppk]

The only relay in the row that has anything to dowith the contactor operation is K20 the rightmost one. It provides 24 volts for the contactor control circuit.