York Solid State Starter

[BKS60]

I have 2 older models YSDADASA-CLA with liquid cooled Starters. One unit is continually having over temp faults. Pump is new, condensor water lines are free of obstructions and pressure diff is normal, coolant level is full and the heat exchanger was pulled and cleaned. Blew out the heat sinks.

The chiller adjacent is running fine with all temps checking the same.

I would like to ask if anyone has any info on checking the resistors on the trigger board or would have any suggestions on where to locate this info.

Currently the customer has a box fan on the trigger board trying to keep unit online.

[york56]

The SCR's have thermistors that look at the temp. needs to be below 109 deg. trip at 212 deg all three legs need to be the same or close if they are not you will trip you most likely have a bad sensor check page 23 of this IOM for the resistance chart.

[BKS60]

You sir are a gentleman and a scholar!
Thats exactly the info I need!!!!!!!!!! Many thanks!

[york56]

Glad that I could help you out.

[referteacher]

Same subject, slightly different tact.

How often is it REALLY necessary to change the coolant fluid? ( I know the manual says every year, but just wondering what all you experienced "Yorkies" think.

Is it necessary to use York's "snake oil" or is there something generic that will do just as well (or better)?

[york56]

As part of the winter service contract agreemnets we use to change it yearly regardless but we were factory as for other companies haven't seen alot of companies change it at all , you could probably go 2 years but you should check the level at required intervals , as for something else for replacement don't know of anything but mabey you could buy a container and have it tested to see whats in it percentage #s just a thought.

[referteacher]

As part of the winter service contract agreemnets, we use to change it yearly regardless. But we were factory. As for other companies, haven't seen alot of companies change it at all. You could probably go 2 years, but you should check the level at required intervals. As for something else for replacement, don't know of anything, but maybe you could buy a container and have it tested to see whats in it . Percentage #s just a thought.

O.K. Just might do that. Thanks

[9675]

Also check how hoses are hooked to condenser. If it is a 3 pass machine and hoses are on opposite ends(only half of condenser delta P) you can move to inlet and outlet of actual piping, this will increase flow (delta P) of heat exchanger. This has help some places with high ambient problems.

[acjourneyman]

I had that same problem once and found that one of the sensor wires was rubbing on the door and every once in awhile it would short out and give a high motor temp trip.

[supertek65]

i had 2 of them, I think same circa???
there was a service bulletin to add a small small tiny capacitor to the main circuit board!

I went to radio shack and spent $1.99 BAM!!!!!!!!!!!!!!!!!!!!

I still have the service guide in my basement!

[BKS60]

I'ld like a copy if you happen to run across it sometime.

Turned out the problem on this post was a small leak in the cabinet and the heat was evaporating the evidence. I put new hoses on and it never tripped again.

[supertek65]

no problem!
I will scan it for you this weekend!!!!!!!!!!!!!!!!

I'ld like a copy if you happen to run across it sometime.

Turned out the problem on this post was a small leak in the cabinet and the heat was evaporating the evidence. I put new hoses on and it never tripped again.

[batterup]

there are several green sheets i can share if need be!!!! the starter fluid is distilled water with nitrate or coloring to know when to change