RS1500000 Rev. 2
16
Component Testing
To avoid risk electrical shock, personal injury, or death,
always disconnect electrical power source to the freezer
before attempting to service, unless test procedures require
power to be connected. When removing any wiring from terminals they must be replaced on the same terminals.
Ensure all ground wires are connected before certifying unit as repaired and/or operational.
WARNING
!
Testing for Leaks
DANGER
!
Free oxygen will explode on contact with oil.
Acetylene will explode spontaneously when put under
pressure.
To prevent violent explosions that may result in
serious injury or death to persons in or near the
immediate vicinity, NEVER use oxygen or acetylene
for pressure testing or cleanout of refrigeration
systems.
WARNING
!
To avoid severe personal injury or death from fire,
keep system free from contamination due to presence
of air. Follow instructions exactly.
Electrical System
WARNING
!
To avoid possible electric shock, personal injury or
death disconnect power before servicing. Follow
specific steps listed in this manual for testing or
replacement of a suspected failed component.
All electrical components are grounded to the cabinet.
The green center conductor of three wire lead cord is
also attached to the cabinet to provide a grounding circuit
when the lead cord is plugged into a properly grounded
electrical outlet. After replacing an electrical component,
always verify the ground wire is reconnected.
The electrical outlet from which the appliance is to
receive its power should always be checked to verify it is
properly wired.
Compressor Electrical Tests
Compressor terminals on all models can be reached only
from the rear of the cabinet.
If freezer does not operate, do not assume compressor
has failed until all other possibilities are eliminated.
Is current entering the compressor through the power
cord?
Check for low voltage at the compressor terminals, a
minimum of 100 volts is required for compressor to
start.
If the necessary voltage is available, check for failures
in:
Over load protector
Starting relay
Temperature control,
Cabinet wiring harness.
Testing Compressor Direct
To test compressor with no other wiring in the circuit is
called DIRECT TEST. Safest way to check the
compressor is by using a compressor tester.
Run
Common
Start
Power
cord
Capacitor
connections
Switch
Compressor Tester
