OK GUYs , HAVE A R404 WALKIN FREEZER at Zero degrees,THAT HAS A FROZEN DRAIN.
RDI made PR199LOP REF no 0316106. Customer has No tech info.
Do these units have a defrost cycle?? heater in/around the pan?
I'd think so.. But have no experience on these systems. Just applying some VERY Simple logic...[maybe]
THE EXPANSION VALVE IS 2" IN white ICE along with that side of the coil
.. wATER DRIPS DOWN FROM THE DRAIN and freezes in strings. So if there is liquid water it must be defrosting sometime but the plugged drain is causing
Its holding "o" temp so freon would be OK it seems. I havent investigated
the pressures yet.. [roof unit]
.. THE HEATER cord ALONG THE DRAIN IS WORKING. Of course there is
no access to the drain outside of the walkin box and it goes in the wall.
So I figured I'd get some hot water into the plastic drain pipe to get it started opening up I hope.. Its 6 years old
Start with customer moving 1000 pounds of food to get the ladder up there.
How am I doing so far?
and see that there is a defrost[or should be a] cycle.
So I should force that/confirm its working and get the drain unplugged/unthawed huh...defrost timer would of course be on the roof .
How often should it come on, and for how long? I want to confirm/change
the defrost timing