Rheem air conditioner troubleshooting

The company Rheem was founded in the 1920`s and started with the production of water heaters. Gradually the company acquired Ruud Manufacturing and plants Raypak. And in the 1988, the brand Rheem became a subsidiary of the Japanese firm Paloma Industries. Today the headquarters of Rheem is in the United States. Having won the universal respect, the company Rheem became the market leader in heating and cooling industry. Troubleshooting table below is for Rheem air conditioning systems. It will help in case of the equipment failure. Компания Rheem была создана в далеких 1920-х годах

Rheem A180CL25E air troubleshooting

Unit will not run• Power off or loose electrical connection• Check for correct voltage at compressor contactor in control box
• Thermostat out of calibration-set too high• Reset
• Failed contactor• Check for 24 volts at contactor coil - replace if contacts are open
• Blown fuses• Replace fuses
• Transformer defective• Check wiring-replace transformer
• High pressure control open (if provided)• Reset-also see high head pressure remedy-The high pressure control opens at 450 PSIG
• Interconnecting low voltage wiring damaged• Replace thermostat wiring
Condenser (an runs, compressor doesn't• Loose connection• Check for correct voltage at compressor - check & tighten all connections
• Compressor stuck, grounded or open motor winding open internal overload.• Wait at least 2 hours for overload to reset. If still open, replace the compressor. At compressor terminals, voltage must be within 10% of rating plate volts when unit is operating.
• Low voltage condition• Add start kit components
Insufficient cooling• Improperly sized unit• Recalculate load
• Improper airflow• Check - should be approximately 400 CFM per ton.
• Incorrect refrigerant charge• Charge per procedure attached to unit service panel.
• Air. non-condensibles or moisture in system• Recover refrigerant, evacuate & recharge, add filter drier
• Incorrect voltage• At compressor terminals, voltage must be within 10% of rating plate volts when unit is operating.
Compressor short cycles• Incorrect voltage• At compressor terminals, voltage must be ± 10% of nameplate marking when unit is operating.
• Defective overload protector• Replace - check for correct voltage
• Refrigerant undercharge• Add refrigerant
Registers sweat• Low evaporator airflow• Increase speed of blower or reduce restriction - replace air filter
High head pressure- low vapor pressures• Restriction in liquid line, expansion device or filter drier• Remove or replace defective component
• Flow check piston size too small• Change to correct size piston
• Incorrect capillary tubes• Change coil assembly
• TXV does not open• Replace TXV
High head pressure-high or normal vapor pressure - Cooling mode• Dirty condenser coil• Clean coil
• Refrigerant overcharge• Correct system charge
• Condenser fan not running• Repair or replace
• Air or non-condensibles in system• Recover refrigerant, evacuate & recharge
Low head pressure-high vapor pressures• Defective Compressor valves• Replace compressor
• Incorrect capillary tubes• Replace coil assembly
Low vapor pressure - cool compressor - iced evaporator coil• Low evaporator airflow• Increase speed of blower or reduce restriction - replace air filter
• Operating below 65*F outdoors• Add Low Ambient Kit
• Moisture in system• Recover refrigerant - evacuate & recharge - add filter drier
High vapor pressure• Excessive load• Recheck load calculation
• Defective compressor• Replace
Fluctuating head & vapor pressures• TXV hunting• Check TXV bulb clamp - check air distribution on coil - replace TXV
• Air or non-condensibles in system• Recover refrigerant, evacuate & recharge
Gurgle or pulsing noise at expansion device or liquid line• Air or non-condensibles in system• Recover refrigerant, evacuate & recharge

Rheem ARL-JEZ 16 Seer Series air troubleshooting

High superheatLow chargeCheck system charge
Faulty metering deviceRestricted cap tube. TEV (TXV)
Power element superheat adjustment
Foreign matter stopping flow
High internal loadHot air (attic) entering return
Heat source on; mis-wired or faulty control
Restriction in liquid lineDrier plugged
Line kinked
Low head pressureLow charge
Operating in low ambient temperatures
Suction or liquid line subjectedHot attic
to high heat sourceHot water line
Low voltageLoose wire connectionsCheck wiring
Power company problem, transformerHave problem corrected before diagnosis continues
Undersized wire feeding unitCorrect and complete diagnosis
High voltagePower company problemHave problem corrected
High head pressureOverchargeCheck system charge
Dirty heat pump coilClean coil
Faulty or wrong size heat pump fan motorReplace fan motor
Faulty fan blade or wrong rotationReplace fan blade
Replace with correct rotation motor
Recirculation of airCorrect installation
Additional Heat SourceCheck for dryer vent near unit
Check for recirculation from other equipment
Non-condensiblesRecover refrigerant. Evacuate and recharge system
Equipment not matchedCorrect mis-match
Short cyding of compressorFaulty pressure controlReplace pressure control
Loose wiringCheck unit wiring
ThermostatLocated in supply air stream
Differential setting too close
Customer misuse
TEVInternal foreign matter
Power element failure
Valve too small
Distributor tubeAubes restricted
Short cyding of compressor (cont.)Low chargeCheck system charge
Low evaporator air flowDirty coil
Dirty filter
Dud too small or restricted
Faulty run capadtorReplace
Faulty internal overloadReplace compressor
No voltage on line side of control boardBlown fuses or tripped drcuit breakerCheck for short in wiring or unit
Improper wiringRe-check wiring diagram
Improper voltageHigh voltageWrong unit
Power supply problem
Low voltageWrong unit
Power supply problem
Wring undersized
Loose connections
MoisturePoor evacuation on installation or during serviceIn each case, the cure is the same. Recover refrigerant. Add filter drier, evacuate and re-charge
High head pressureNon-condensibles air
Unusual head and suction readingsWrong refrigerant
Foreign Matter- copper filingsCopper tubing cuttings
Copper oxideDirty copper piping
Welding scaleNitrogen not used
Soldering fluxAdding flux before seating copper part way
Excess soft solderWrong solder material
Compressor failuresLine tubing too longAdd oil to the recommended level
Line tubing too largeReduce pipe size to improve oil return
Low suction pressureLow chargeCheck system charge
Refrigerant leaksRepair and recharge
Cold. Noisy compressor - SluggingDilution of Oil with RefrigerantObserve piping guidelines
Noisy compressorMigrationCheck crankcase heater
Cold, sweating compressorFloodingCheck system charge
Low LoadReduced air flowDirty filter
Dirty coil
Wrong duct size
Restricted duct
Thermostat settingAdvise customer
Short cycling of compressorFaulty pressure controlReplace control
Loose wiringCheck all control wires
ThermostatIn supply air stream, out of calibration.
Customer misuse
Liquid in the compressor shellFaulty or missing crankcase heaterReplace crankcase heater
Too much liquid in systemIncorrect pipingCheck Piping guidelines
OverchargeCheck and adjust charge
On start upIncorrect pipingReview pipe size guidelines
TEV hunting when runningOversized TEVCheck TEV application
Poor system control using a TEVLoose sensing bulbSecure the bulb and insulate
Bulb in wrong locationRelocate bulb
Wrong size TEVUse correct replacement
Improper superheat settingAdjust, if possible: Replace, if not
High Superheat. Low Suction PressureMoisture freezing and blocking valveRecover charge, install filter-drier, evacuate system, recharge
Dirt or foreign material blocking valveRecover charge, install filter-drier, evacuate system, recharge
Low refrigerant chargeCorrect the charge
Vapor bubbles in liquid lineRemove restriction in liquid line Correct the refrigerant charge
Remove non-condensible gases
Size liquid line correctly
Misapplication of internally equalized valveUse correct TEV
Plugged external equalizer lineRemove external equalizer line restriction
Undersized TEVReplace with correct valve
Loss of charge from power head sensing bulbReplace power head or complete TEV
Charge migration from sensing bulb to power head (Warm power head with warm, wet cloth. Does valve operate correctly now?)Ensure TEV is warmer than sensing bulb
Improper superheat adjustment (Only applicable to TEV with adjustable superheat settings)Adjust superheat setting counter- clockwise
Valve feeds too much refrigerant, with low superheat and higher than mal suction pressureMoisture causing valve to stick open.Recover refrigerant, replace filter- drier. evacuate system and then nor- recharge
Dirt or foreign material causing valve to stick openRecover refrigerant, replace filter- drier. evacuate system and recharge
TEV seat leak (A gurgling or hissing sound is heard AT THE TEV during the off cycle, if this is the cause.) NOT APPLICABLE TO BLEED PORT VALVES.Replace the TEV
Oversized TEVInstall correct TEV
Incorrect sensing bulb locationInstall bulb with two mounting straps, in 2:00 or 4:00 position on suction line, with insulation
Low superheat adjustment (only applicable to TEV with adjustable superheat setting)Turn superheat adjustment clockwise
Incorrectly installed, or restricted external equalizer lineRemove restriction, or relocate external equalizer
Compressor flood back upon start upRefrigerant drainage from flooded evaporatorInstall trap riser to the top of the evaporator coil
Compressor in cold locationInstall crankcase heater on compressor
Superheat is low to normal with low suction pressureUnequal evaporator circuit loadingEnsure air flow is equally distributed through evaporator
Check for blocked distributor tubes
Low load or airflow entering evaporator coilEnsure blower is moving proper air CFM
Remove/Correct any air flow restriction
Superheat and suction pressure fluctuate (valve is hunting)Expansion valve is oversizedInstall correct TEV
Sensing bulb is affected by liquid refrigerant or refrigerant oil flowing through suction lineRelocate sensing bulb in another position around the circumference of the suction line
Unequal refrigerant flow through evaporator circuitsEnsure proper distributor piston is inserted in RCBA or RCHA coil
Ensure sensing bulb is located properly
Check for blocked distributor tubes
Improper superheat adjustment (only possible with TEV having superheat adjustment)Replace TEV or adjust superheat
Moisture freezing and partially blocking TEVRecover refrigerant, change filter- drier, evacuate system and recharge
Valve does not regulate at allExternal equalizer line not connected or line pluggedConnect equalizer line in proper location, or remove any blockage
Sensing bulb lost its operating chargeReplace TEV
Valve body damaged during soldering or by improper installationReplace TEV