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HVAC Service Documents

Recommended Charging Procedure
Charge Determination
Basic Troubleshooting
R134a and PAG Oil Handling
Compressor Oil Handling
Compressor Troubleshooting
Blower Motor
Glossary of Common HVAC components

Gauge Diagnostics

Using Gauges for Troubleshooting
Air in cooling system (insufficient suction)
Defective expansion valve
Excessive refrigerant
Insufficient compressor operation
Insufficient refrigerant
Moisture Intrusion
Refrigerant does not circulate

Summary Table of Gauge Diagnostics



Compressor Oil Handling Practices

A Certain amount of oil will remain coated to the walls of hoses, condenser, inside dryers, and inside the evaporator core. When servicing, if a component is removed and replaced with a new part the following chart is used in addition to the oil the charging station recovered during the refrigerant recovery.

COMPONENT
ADD OIL (CM3)
ADD OIL (OZ.)
EVAPORATOR
50
1.69
CONDENSER
30
1.01
RECEIVER DRYER
10
.34
HOSE (PIPING)
10 PER HOSE
.34 PER HOSE



**Add recommended amount of oil + recovered oil.



Information obtained in ZEXEL Service Manual
Basic service procedures for R134a Air Conditioning Systems.
Copyright 1992
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Perrin Manufacturing is committed to providing you with superior products and services; we renew this pledge through continual improvement of our products and motivation of our staff.

We faithfully comply with all of the requirements of our ISO 9001:2008 Quality Management System, the most current edition of the standard. Beyond that, our highly trained quality staff persistently search for new ways to improve the effectiveness of our system.
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