Jenn-Air Jenn-Air Service Manual

Also see for JENN-AIR: Use and care guide

Contents

Component Testing! WARNINGTo avoid risk of electrical shock, personal injury, or death, disconnect electrical power source to unit, unless testprocedures require power to be connected. Discharge capacitor through a resistor before attempting to service.Ensure all ground wires are connected before certifying unit as repaired and/or operational.16021730 Rev. 05Component Description Test ProceduresCondenser Condenser is a tube and fin constructionlocated in machine compartment.Condenser is on high-pressure dischargeside of compressor. Condenser functionis to transfer heat absorbed by refrigerantto ambient.Higher-pressure gas is routed tocondenser where, as gas temperature isreduced, gas condenses into a high-pressure liquid state. Heat transfer takesplace because discharged gas is at ahigher temperature than air that ispassing over condenser. It is veryimportant that adequate airflow overcondenser is maintained.Condenser is air cooled by condenserfan motor. If efficiency of heat transferfrom condenser to surrounding air isimpaired, condensing temperaturebecomes higher. High liquid temperaturemeans liquid will not remove as muchheat during boiling in evaporator asunder normal conditions. This would beindicated by high than normal headpressures, long run time, and highwattage. Remove any lint or otheraccumulation that would restrict normalair movement through condenser.From condenser the refrigerant flows intoa post condenser loop which helpscontrol exterior condensation on flange,center mullion, and around freezer door.Refrigerant the flows through the drier toevaporator and into compressor throughsuction line.Leaks in condenser can usually be detected by using an electronic leak detectoror soap solution. Look for signs of compressor oil when checking for leaks. Acertain amount of compressor oil is circulated with refrigerant.Leaks in post condenser loop are rare because loop is a one-piece copper tube.For minute leaks1. Separate condenser from rest of refrigeration system and pressurizecondenser up to a maximum of 235 PSI with a refrigerant and dry nitrogencombination.2. Recheck for leaks.Refrigerator lightswitchSingle pole, single throw switchcompletes circuit for light when door isopen.Check resistant across terminals.Switch arm depressed“NO” terminals OpenSwitch arm up“NO” terminals ClosedThermostat Thermostat is in a series circuit withterminal 2 of defrost timer, and defrostheater. Circuit is complete if evaporatorfan motor operates when cold.Controls the circuit from freezerthermostat through defrost terminator todefrost heater. Opens and breaks circuitwhen thermostat senses preset hightemperature.Test continuity across terminals.With power off and evaporator coil below freezing, thermostat should showcontinuity when checked with ohmmeter. See “Heater, evaporator (defrost)”section for additional tests.After defrost thermostat opens, thermostat remains open until end of defrostcycle and refrigerator starts cooling again. Defrost thermostat senses a presetlow temperature and resets (closes).WARNING!To avoid severe personal injury or death from sudden eruption of highpressures gases, observe the following:Protect against a sudden eruption if high pressures are required for leakchecking.Do not use high-pressure compressed gases in refrigeration systemswithout a reliable pressure regulator and pressure relief valve in thelines.