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Qaagi - Book of Why

Causes

Effects

by the Fault analysis(passive) caused bytwo , low suction pressure

a combination of ejector system and process operationcauseshigh vacuum pressure

Low load conditionscan causeexcessively low suction pressure

flexingcausedfrom high vacuum pressure

by sampling of dust , etc(passive) caused byincreased suction pressure

by sampling of dust(passive) caused byincreased suction pressure

a stuck open valvewould causethe higher suction pressure

permitting an increased volume of refrigerant to flow through the evaporatorthereby causinga higher suction pressure

by the valve(passive) could be causedHigh suction pressure

low discharge pressureresultingin low suction pressure

the coilcausinghigh suction pressure

Irregularities ... instances of valve failureresultsin uncharacteristically high suction pressure

a drop in coil temperaturecausesa drop in the suction pressure

the duct leakcausesa higher suction pressure

anything other system problemcauseslow suction pressure

by low refrigerant ... but insufficient heat getting to the evaporator(passive) is ... caused bythe low suction pressure

the valve not being seated properly(passive) could be caused byHigh suction pressure

by the valve not being seated properly(passive) could be caused byHigh suction pressure

by the valve not being seated properly(passive) could be causedHigh suction pressure

Increased compressor 76 speedcausesa lower suction pressure

to drive the correct amount of liquid through the expansion devicecausinga low suction pressure

the coilresultingin lower suction pressure

too high a speedcausingtoo great a suction pressure

A restricted suction linecauseslow suction pressure

resulting the low feed to the evaporatorcausinglow suction pressure

by hot gas defrosting(passive) caused byhigh suction pressure

hot gas defrosting(passive) caused byhigh suction pressure

Prime ... other system problemcauseslow suction pressure

by low refrigerant(passive) is ... caused bythe low suction pressure

by low refrigerant(passive) is ... causedthe low suction pressure

by low refrigerant(passive) where ... to be caused bylow suction pressure

by low refrigerant(passive) to be caused bylow suction pressure

low refrigerant(passive) where ... to be caused bylow suction pressure

The system 100 will then be operating with an undersized coilresultingin low suction pressure

the low chargecauseslow suction pressure

by the lack of load(passive) caused bylow suction pressure

Expansion ValvesCausingLow Suction Pressure

a / c systems One of the most missed A / C problems that can harm a compressorcauselow suction pressure

A sticking expansion valve stickingcan causea low suction pressure

This problemwill causelow suction pressure

air to be sucked incausingair to be sucked in

in mediaresultedin media

low return air volume and insufficient cooling capacitycauseslow return air volume and insufficient cooling capacity

Excessive discharge pressure(passive) can be caused byExcessive discharge pressure

Low discharge pressure(passive) may be caused byLow discharge pressure

cavitation and loss of flowcausescavitation and loss of flow

to clean surfacesresultingto clean surfaces

a high compression ratiocausinga high compression ratio

a high compression ratio(passive) is ... caused bya high compression ratio

a high compression ratio(passive) is ... causeda high compression ratio

to higher mass flow ratescontributesto higher mass flow rates

the air lock(passive) caused bythe air lock

in a vacuumresultsin a vacuum

from a loss of refrigerant chargecould resultfrom a loss of refrigerant charge

in the compressorresultsin the compressor

Cavitation(passive) is caused byCavitation

Cavitation(passive) is caused byCavitation

a loss - of - coolant event(passive) caused bya loss - of - coolant event

by trying to maintain too low an indoor temperature , OR lack of airflow through the inside coilGenerally causedby trying to maintain too low an indoor temperature , OR lack of airflow through the inside coil

in compressor cyclingresultsin compressor cycling

from a secondary plant transientresultingfrom a secondary plant transient

in increased leakagewill resultin increased leakage

to higher compression ratio and lower volumetric efficiencyleadsto higher compression ratio and lower volumetric efficiency

the refrigerant to flash as soon as it leaves the expansion devicecausesthe refrigerant to flash as soon as it leaves the expansion device

the compressor to run extremely hot with a rise in amps drawnwill causethe compressor to run extremely hot with a rise in amps drawn

aspiration of and/orcould causeaspiration of and/or

The cavitation phenomenon of horizontal multistage centrifugal pump(passive) may be caused byThe cavitation phenomenon of horizontal multistage centrifugal pump

in compress cyclingresultsin compress cycling

compressor overheat high discharge temp & high discharge SHwill causecompressor overheat high discharge temp & high discharge SH

bleedingmay causebleeding

in lower energy consumption of a refrigerating systemwill resultin lower energy consumption of a refrigerating system

to operatewas designedto operate

to a suction port of a compressorledto a suction port of a compressor

discomfort and breast injurycan causediscomfort and breast injury

alsowill ... resultalso

a higher compression ratio and lower system capacitiescan causea higher compression ratio and lower system capacities

high loads(passive) caused byhigh loads

in coil frostingwill ... resultin coil frosting

in the creation of an incomplete flap , free flap or thin flapmay resultin the creation of an incomplete flap , free flap or thin flap

in high axial thrustresultin high axial thrust

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