Help PDQ problems

[john30036]

Hello all,

I am very familiar with most washes except the PDQ laser 4000. After numerous hours spent getting this machine up and running flat tires, broken wheels, loose belts and the list goes on. I finally got it up and running washed a couple of cars with no problem. Went back into the control room and thought I would titrate the soap used the 100 then 10 option herd a "pop" and ever since then I keep blowing the f 030 and f -040 fuses 5 amp. When those fuses blow I loose the joy stick also. The only thing else that was done was the water was off to the weep dema valve I turned on the water that was it.

This machine has 4 chemicals in it and I identified 2 the soap and the wax. were these machines set up for 2 step presoak? And the other one was a red type soap. From the top of the solenoids how would it go? Soap 1, soap 2, wax undercarriage maybe?

Thanks in advance

 

[PEI]

It would most likely have come from the factory with Soap1, Soap 2, Tri-Foam, Wax, Undercarriage, going from top to bottom. If it has been retrofitted with pods, then the tri-foam injector may be at the top to make plumbing easier. You can move the Danfoss or rewire them to change the order.

If you have not already looked at your festoon cable, then you would do well to start with it. They are one of the 4000's biggest weakpoints. Typically you start blowing fuses suddenly when a high voltage wire starts touching the low voltage ones in the festoon.

 

[jcollins]

If it was using 4 chemicals and 3 of the hoses from the solenoid valves are going up to the overhead manifold and 1 hose going down to the inlet side of the high pressure pump, it would be set up for 2-step soaps.
After 1995 (?), the top solenoid was soap1, 2nd down was low pressure wax, third down was soap2 (depending on plumbing option #used, could be low pressure or high pressure), fourth down was drying agent (injected into high pressure pump), fifth down was polysealant (injected into high pressure pump). It could have had two more solenoids below the polysealant if it had wheel cleaner or rust inhibitor options..
Are you the new owner/operater of this Laser?

 

[john30036]

Thanks for the answers, My whole problem was low pressure soap solenoid (Top). This thing is strange, on the best wash #4 it makes 2 low pressure soap passes followed by 2 high pressure passes, followed by 1 low pressure drying agent, followed high pressure clearcoat, then at last a R.O pass seems a bit much to me. .
Jcollins--- Actually I think I am a rare breed I am a chemical rep who just happens to work on the equipment years and years of being in the field get to know just about every piece of equipment.
Thanks all.