Service & TroubleshootingPregunta 80 de 110
Low airflow across an evaporator coil during cooling most commonly causes what?
a.High superheat at the coil
b.Higher supply air temperature
c.A cold, possibly frozen coil and low suction pressure
d.Higher condenser airflow
Explicación
Restricted evaporator airflow, from a dirty filter, blocked coil, or weak blower, reduces heat pickup so the coil runs colder and suction pressure drops, sometimes freezing the coil. Restoring airflow by cleaning filters and coils is the first corrective step. A frozen coil should be thawed before further diagnosis.
Practica las 110 preguntas gratis — sin registro.
Preguntas relacionadas de este tema
- A contactor in an air-conditioning condenser performs what function?
- A typical low-voltage control (thermostat) circuit in residential HVAC operates at what voltage?
- If a condenser fan motor fails while the compressor keeps running, what symptom is most likely?
- SEER (or SEER2) is a rating that describes what?
- AFUE is the efficiency rating used for what equipment?
- HSPF (or HSPF2) rates the seasonal efficiency of what?
Última revisión: · proceso editorial
Equipo Editorial de PrepPass · Verificado con California CSLB C-20 Warm-Air HVAC Trade Exam · Cómo revisamos