Hobart washer

[fixbear]

Wow, There is one I never came across. It’s not a dishwasher, but a Prep Washer. Are you sure it’s PWV instead of a number? Like PW10R or PW20R.

Still it comes down to how they measure the water. If it is by time, check the drain seal of the tank and the water supply to be at the right pressure and volume. Hobart’s usually have a float switch/Temp probe that is a reed switch for monitoring and fill. They sometimes get crude inside them. But that should overfill. So I’d be looking at supply side first. Solenoid screen, line pressure, and heater scale. Being it’s a graphic digital display board. They might use pressure sensors to measure water level.

I really don’t know for sure, since I’ve never worked on . one, but that’s the logic I’d use.

[ectofix]

From what I found, that PWVER model-series is a newer door type dishwasher similar to a AM15.

One of our new conveyor machines (a CLeN series) and one of our new-ish (can’t remember the model) glass washers both use electro-tra-digically sumtin’ or anohter-based diaphragm level sensors (…vicethe old float switches) -like what’s in a cloths washing machine. Apparently Hobart decided to go that direction after so MANY years of using float switches.

Hobart has made it difficult to access their OLD resource center. I don’t know what they were thinking – EITHER way… since float switches worked SO well before…and so DID their website.

When I get to work tomorrow night, I’ll go find the old internet link I have for their original resource center. Perhaps whatever I find there will shed some light on this topic.

[ectofix]

From what I found, that PWVER model-series is a newer door type dishwasher similar to a AM15.

One of our new conveyor machines (a CLeN series) and one of our new-ish glass washers use diaphragm level sensors (vice float switches) -like what’s in a cloths washing machine. Apparently Hobart decided to go that direction after so MANY years of using float switches.

Hobart has made it difficult to access their OLD resource center. I don’t know what they were thinking since float switches worked SO well before.

When I get to work tomorrow, I’ll find my old internet link I have for the original resource center. Perhaps that will shed some light on this topic.

Forgive my slow response. This platform is SO screwed up! I couldn’t open a new response dialog box so tacking it on HERE to my prior response (if THAT even works!). Here goes:

So, I stand corrected. That machine is a pot/utensil washer (a door-type machine on steroids). The PWVeR is simply a scaled-down version of the PW10 and PW20 models. The difference being that, on the bigger models, the upper portion of the door raises, while the lower portion swings out to provide a drain platform. Otherwise, PWV and PWVeR models feature only a single piece vertical lift door. The “eR” suffix indicates that the machine that has an energy recovery coil included to scavenge heat from steam generated by the machine.

This PW series machine appears to use a pressure transducer for sensing water level instead of a float switch. The transducer is connected underneath to a tube leading an air trap exposed to the water and supplies a mV level output to the control board.

I have no service manual on it (since I’m not a Hobart tech) but a DIFFERENT service manual I looked in for a Centerline undercounter machine that IS available online states that its “pressure sensor” (not called a transducer in that manual) has an expected output range of 0.5 – 0.73 mV. I surmise that this would be when the transducer is under pressure, so…when the machine should be FULL.

So, I can only think of two possibilities that might cause a fill error (control board timing out) while the tank only fills to 1/3 its capacity:

1. Low incoming water volume

2. The drain is heavily leaking by

Otherwise, if there was a failure with the tranducer or its related air trapping thingamajig, the machine would likely try to OVERFILL…which it can’t because of the standpipe, so it would simply keep trying to fill when it’s already full.

[jailkeeper]

Try to blow through the hose. remove it from the transducer and blow toward the tank to make sure it is clear. Do not blow into the transducer it will damage it

[fixbear]

remember that the transducer height is critical to the water level.