System Diagnostics and Troubleshooting Procedures

, by Tomczyk, John

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ISBN: 9781930044159 | 1930044151
Cover: Spiral Bound
Copyright: 1/1/2003

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Supplemental Materials

Diagnosing Air Conditioning Systems

Air Flow

(2)

Refrigerant Cycle

(6)

Condensers

(1)

Liquid Line Restrictions

(1)

Suction Line Restrictions

(1)

Undercharge

(1)

Overcharge

(1)

Compressor Inefficiencies

(1)

Noncondensibles

(1)

Low Condenser Air Entering Temperature

(1)

High Condenser Air Entering Temperature

(1)

Capillary Tubes

(1)

TXVs

(2)

Systematic Troubleshooting

Service Checklist

(1)

Troubleshooting

(23)

Undercharge of Refrigerant

(2)

Compressor discharge

(1)

High evaporator superheat

(1)

High compressor superheat

(1)

Low condenser subcooling

(1)

Low compressor amps

(1)

Low evaporator pressure

(1)

Low condensing pressure/temperature

(1)

Overcharge of Refrigent

(1)

High discharge temperature

(1)

High condenser subcooling

(1)

High condensing pressures

(1)

Higher condenser splits

(1)

Normal to high evaporator pressures

(1)

Normal evaporator superheat

(1)

High compression ratios

(1)

Overcharged Capillary Tube Systems

(1)

Dirty Condenser or Restricted Air Flow Over Condenser

(1)

High discharge temperatures

(1)

High condensing pressures

(1)

High condenser splits

(1)

Normal to high condenser subcooling

(1)

Normal to high evaporator pressures

(1)

Normal superheat

(1)

High Compression Ratios

(1)

High amp draw

(1)

Restricted Liquid Line After the Receiver

(4)

Higher than normal discharge

(1)

High superheat

(1)

Low evaporator pressures

(1)

Low condensing pressures

(1)

Normal condenser subcooling

(1)

Low condenser splits

(1)

Local cold spot or frost after restriction

(1)

Bubbles in sightglass

(2)

Low amp draw

(1)

Short cycle the low pressure

(1)

Restricted Liquid Line Before the Receiver

(2)

High discharge temperature

(1)

High condensing (head) pressures

(1)

High condenser subcooling

(1)

High condenser splits

(1)

Low evaporator pressures

(1)

Low amp draw

(1)

Bubbling sightglass

(1)

Short cycling on the LPC

(1)

Air in the System

(1)

High discharge temperatures

(1)

High condensing (head) pressures

(1)

High condenser subcooling

(1)

High condenser split

(1)

High compression ratios

(1)

Normal to slightly high evaporator (suction) pressures

(1)

Normal superheat

(1)

High amp draws

(1)

Restricted Metering Device

(2)

High discharge temperatures

(1)

Low condensing (head) pressures

(1)

Lower condenser splits

(1)

Normal to slightly high condenser subcooling

(1)

Low evaporator pressure

(1)

High superheat

(1)

Low amp draw

(1)

Short cycling on the low pressure control (LPC)

(1)

Restricted Air Flow Over Evaporator

(2)

Low discharge temperatures

(1)

Low condensing (head) pressures

(1)

Low condenser splits

(1)

Low to normal evaporator (suction) pressures

(1)

Low superheat

(1)

Cold compressor crankcase

(1)

Oil-Logged Evaporator

(2)

Noisy compressor

(1)

TXV having a hard time controlling superheat (hunting)

(1)

Low evaporator and compressor superheat

(1)

Warmer than normal box temperatures with capacity losses

(1)

Inefficient Compressor from Bad Valves

(4)

Higher than normal discharge temperatures

(1)

Low condensing (head) pressures and temperatures

(1)

Normal to high condenser subcooling

(1)

Normal to high superheat

(1)

High evaporator (suction) pressures

(1)

Low amp draw

(2)

Leak Detection, Evacuation, and Clean-up Procedures

(1)

Basic Leak Detection

(4)

Testing for Evaporator Leaks

(1)

Testing for Condensing Section Leaks

(1)

Suction and Liquid Line Leak Test

(1)

Advanced Leak Detection

(3)

Testing for Pressure Dependent Leaks

(1)

Testing for Temperature Dependent Leaks

(1)

Testing for Vibration Dependent Leaks

(1)

Testing for Combination Dependent Leaks

(1)

Testing for Cumulative Microleaks

(1)

Modern Leak Detectors

(6)

Electronic Leak Detection

(1)

Corona discharge

(1)

Thermistor

(1)

Dielectric

(1)

Ion

(1)

Electronic Leak Detector Operation

(1)

Ultraviolet (UV) Fluorescent Leak Detection

(1)

Choosing a UV Lamp

(1)

Halide Torch Leak Detection

(2)

Refrigerant Dyes

(1)

Standing Pressure

(1)

Material Safety Data Sheet

(2)

Standing Vacuum

(1)

Ultrasonic Leak Detection

(1)

Leak Pinpointing And Area Monitoring

(4)

Sensitivity

(1)

Detection Limit

(1)

Selectivity

(2)

Nonselective detectors

(1)

Halogen-selective detectors

(1)

Compound-specific detectors

(1)

Fluorescent Dyes

(1)

Choosing an Area Monitor

(1)

System Evacuation Using the Deep Vacuum Method

(14)

Why Pull a Vacuum?

(3)

Deep Vacuums

(1)

Micron Gauges

(2)

Vacuum Pump

(8)

Single-stage vacuum pumps

(2)

Vacuum test manifold with two valves

(1)

Vacuum breaker valves

(1)

Pressure drop

(3)

Vacuum pump oil

(1)

Gas ballasts

(2)

System Burnout

(7)

System Clean-Up

(1)

Standard Suction Line Filters

(1)

Combination Acid and Moisture Test Kits

(5)

Notes

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System Diagnostics and Troubleshooting Procedures

Table of Contents

Supplemental Materials