Tecumseh AH5540E User Manual

2
SERVICE HANDBOOK
Introduction
Tecumseh Products Company has prepared this handbook to assist service personnel in safely
working with refrigeration and air conditioning equipment that uses Tecumseh Products Company
hermetic compressors. It is not designed to replace the training required for professional service
personnel. It is also not intended to replace other information available from refrigeration and air
conditioning equipment manufacturers.
Trained Personnel Only
Servicing, repairing, and troubleshooting refrigeration and air conditioning systems should be done
only by those with the necessary knowledge, training, and equipment.
Terminal Venting and Electrocution
Improperly servicing, repairing, or troubleshooting a compressor can lead to electrocution or fire due
to terminal venting with ignition. Follow the precautions below to avoid serious injury or death from
electrocution or terminal venting with ignition.
Fire Hazard from Terminal Venting with Ignition
Oil and refrigerant can spray out of the compressor if one of
the terminal pins is ejected from the hermetic terminal. This
“terminal venting” can occur as a result of a ground fault
(also known as a short circuit to ground) in the compressor.
The oil and refrigerant spray from terminal venting can be
ignited by electricity and produce flames that can lead
to serious burns or death. See figures 1-1 through 1-3 for
details.
Terminal Venting and Electrocution Precautions
To reduce the risk of electrocution or serious burns or death from terminal venting with
ignition:
• Bealertforsoundsofarcing(sizzling,sputteringorpopping)insidethecompressor.
IMMEDIATELYGETAWAYifyouhearthesesounds.
• DisconnectALLelectricalpowerbeforeremovingtheprotectiveterminalcover.Make
sure that all power legs are open. (NOTE: The system may have more
than one power supply.)
• Never energize the system unless: 1) the protective terminal cover is
securelyfastened,and2)thecompressorisproperlyconnectedtoground.
Figures 1-4 through 1-6 illustrate the different means of fastening protective
terminal covers.
• Neverresetabreakerorreplaceafusewithoutfirstcheckingforagroundfault
(ashortcircuittoground).

Anopenfuseortrippedcircuitbreakerisastrongindicationofagroundfault(alsoknow
asashortcircuittoground).Useonlyamegohmmeter(“megger”)oraHi-PotentialGround
tester(Hi-Pot)tocheckforagroundfault.Aconventionalohmmeterwillnotreliablydetect
agroundfaultundercertaincircumstances.SeetheServiceHandbookformoreinforma-
tiononcheckingforagroundfault.Also,alwaysfollowthemeggerorHi-Potmanufacturer’s
proceduresandsafetyrules.

Ifagroundfaultdoesexist,keepthepoweroff.WARNING!Toavoidelectricshock,electro-
cution,andterminalventingwithignition,donotenergizeacompressorthathasaground
!
WARNI NG
Never service, repair, or troubleshoot unless
you are qualified to perform these functions.
Improper servicing can lead to serious
injury or death from fire, electrical shock, or
explosion.

Tecumseh AH5540E Specifications

General

Brand	Tecumseh
Model	AH5540E
Category	Air Compressor
Language	English