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expansion valve to overfeed compressor to knock water regulating valve to fail crankcase drains to plug
refrigerant boiling out of solution from the lube oil liquid refrigerant flooding the compressor and system lube oil viscosity being reduced by refrigerant dilution compressor suction pressure suddenly increasing
compressor lubrication will be improved oil will not leave the crankcase compressor valves will be damaged oil may congeal in the evaporator
compressor damage from improper lubrication refrigerant absorption by the lubricant increased viscosity in the lubricant carbon deposit on the compressor suction valves
add refrigerant to the system adjust the thermal expansion valve to the proper setting adjust the float valve to the proper holding pressure open the hand expansion valve
a shortage of refrigerant in the system air in the system an accumulation of liquid refrigerant in the crankcase a shortage of oil in the crankcase
sudden evaporation of wax crystals in the lubricant sudden evaporation of entrapped air in the lubricant release of refrigerant from the oilefrigerant mixture release of dissolved lubricant from the refrigerant
has nm continuously for a long period suction pressure is below normal oil level is below normal starts after a long idle period
Open the crankcase immediately to check for damage Apply fire fighting water through the crankcase breather Allow the engine to cool before opening the crankcase Assume that there is no damage to the crankshaft
removes combustible gases in the crankcase prevents the formation of combustible gases in the crankcase cools lubricating oil improves cold weather starting
cause a loss of the liquid seal create a vapor lock in the liquid receiver collect in the condenser cause foaming of the oil in the crankcase
open-type hermetic semi-hermetic all the above
too much superheat insufficient superheat suction pressure too low excessive refrigerant returning to the compressor
the splashing of lubrication oil by the crankshaft the dilution of crankcase oil with particles of combustion broken fuel lines spraying oil on the crankcase the ignition of unburned fuel and air in the crankcase
overheated compressor bearings excess lube oil viscosity carbon deposits on the compressor piston rings wax crystals forming in the lubricant
a shortage of refrigerant the compressor running continuously liquid refrigerant returning to the compressor the compressor short cycling on the high pressure cutout
a stuck solenoid valve a shortage of refrigerant too much oil in circulation too much superheat
insufficient lube oil circulating through the system excessive circulation of lube oil through the system insufficient refrigerant in the system an overworked compressor
high discharge pressure frosting of the crankcase high temperature of the overboard water low suction pressure of compressor
free entry of air to the crankcase water entering the crankcase while engine wash-downs are being performed excessive oil leakage during periods of increased blow-by sub-cooling internal components
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