scotsman ice machine not making ice

[ruvy frank]

hi guys i have a ice machine which is not making ice. its getting into the cycle alright with the back pressure around 45psi and then it drops to as low as 4 psi and the head pressure will be around 250 and 350 psi:eek:. the discharge line will be cold and the cuber will not be foaming anything.
what could be wrong with it help me out guys:confused:

[techie]

check your hot gas bypas valve it has an actuator

[Springbok]

Hey ruvy frank.We'll need some more info on that problem,mate.Having a 350psi and a cold discharge sounds dodgy.If you want more info,try this link,there are manuals for Scotsman ice-machines on the site.Hope it helps....

www.air-conditioning-and-refrigeration-guide.com (http://www.air-conditioning-and-refrigeration-guide.com)

[1mikeefc1]

Whats the model of ice machine? Have you checked tev, sounds like possible blockage with information you have given. When it is up and running the suction pressure will drop dramatically through its cycle.

[Kp3]

drier or capillary resticting

[frostybritt]

sounds like the systems choking, my advice is to whip the gas out, put new drier and purge either side with nitro to blow out any oil in the capilary before brazing last joint, vac out and recharge slowly

[Springbok]

Where has ruvy frank gone?Take it he's solved the problem...

[charge line!]

New to the site! But it does sond like a restriction within the TEV-drier. Had a very similer problem with a cascade evap. Found that pressures as you have found them but no ice. Found coil to back of evap had come away (only in part). As a result no ice, though pressures correct. This was on a Scotsman MV 600.
Good luck.

[philfridge]

Hi new to site . 4psi and upto 350 head that is a definate partial blockage at t.e.v .Had this before on one. You gotta put new t.e.v on to sort this out.