Cooling issue
RE: Cryostat Report Post
It's most likely a problem with the fan that cools the condenser. They quit all the time and cause just the behavior you describe.
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Same me . problem is expansion valve.
you can remove the Armaflex insulation from the output of the E-valve module and You turn on 15 minutes and touch the two outlets of the expansion valve you will see a line very cold and a line not cold
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It is most likely the Expansion valve module. You can purchase it from Leica in a kit that comes with the E-valve and a filter dryer. it will take a good hvac person to install as it rather complicated for the average tech. a good test is to remove the back panel...and above the silver insulated box to the left of the electrical slide out is the expansion valve module. Remove the insulation from the two pipes above it. shit the unit down for a few minutes and watch them frost up. they maybfrost and thaw once or so but if one frosts more than the the after the first frost/thaw cycle it's a bad e-valve. it's about$1000 kit but well worth it. what is probably happening is the wall evaporator under the microtome is cooling but likely the gilles evaporator on the top is not cooling. so feel by the base of the microtome and then feel the gilles evaporator when you do the frost test and see if both are cold or only the walled evaporator under the microtome base.
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The e-module kit part number, as listed in the service manual, has been discontinued. Leica customer service says there is no replacement. Does anyone know a good part number?
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