Compressor Replacement - Bryant 189BNV EVOLUTION Service Manual

COMPRESSOR REPLACEMENT

(Reference RCD Instruction # 99TA516169)
The following is a recommended procedure for compressor
replacement. Always refer to the unit product installation, start- -up
& service instructions for detailed procedures.
WARNING
!
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal injury
or death.
Turn off and lock out all power to unit before proceeding.
Discharge all capacitors before proceeding
All wiring and electrical connections shall comply with all
local and national electrical codes.
WARNING
!
PERSONAL INJURY HAZARD
failure to follow this warning could result in personal injury.
Follow recognized safety practices and wear safety glasses,
protective clothing, and gloves. Acids formed as a result of
motor burnout can cause burns.
WARNING
!
PERSONAL INJURY HAZARD
failure to follow this warning could result in personal injury.
do not disassemble bolts, plugs, fittings, etc. until all pressure
has been relieved from compressor.
WARNING
!
PERSONAL INJURY HAZARD
failure to follow this warning could result in personal injury.
Do not operate compressor or provide any electrical power to
the compressor unless the terminal box cover is in place and
secured. Measurements of amps and volts during running
conditions must be taken at other points in the power supply.
Do not provide any power to the compressor unless suction
and discharge service valves are open.
CAUTION
!
UNIT DAMAGE HAZARD
failure to follow this caution may result in equipment damage
or improper operation.
Only suction line filter driers should be used for refrigerant
and oil clean up.
Use of non- -approved products could limit system life and
void unit warranty.
CAUTION
!
UNIT DAMAGE HAZARD
Failure to follow this caution may result in equipment damage
or improper operation.
Do not leave system open to atmosphere. compressor oil is
highly susceptible to moisture absorption.
At the time of compressor change out and at regular preventative
maintenance intervals the acid/moisture content of the system
should be checked using an acid/moisture test kit.
determine, in a few minutes, whether acid and moisture are present
in the system. No oil sample is required. Contact your local
distributor to purchase this device.
Before Changing the Compressor
Check compressor and associated controls to be sure compressor
replacement is necessary.
Failure Classification
The replacement procedure is dependent on the type of failure.
The following describes the classification process:
MECHANICAL FAILURES
1. No damage to windings
as indicated by electri-
cal check
2. Oil clean and odor free
3. Symptoms:Excessive
Noise Won't Pump
Excessively Hot
Replacement Procedure for Mechanical Failure
1. Follow all safety warnings and notices.
2. Precautions must be taken when servicing components
within the control box of this unit. The technician
performing the service must determine that it is safe to work
on or near the inverter. The electrical disconnect that
provides power to the unit must be turned off, locked and
tagged out. This will insure that no damage will occur to the
inverter, controls or other equipment and will prevent injury
if contact is made with the electrical equipment. Wait a
minimum of two minutes before servicing the unit to allow
inverter capacitors to discharge. Follow safety instructions
located on unit control box cover.
3. Remove and recover all refrigerant from system until
pressure gauges read 0 psi. Use all service ports. Never open
a system under a vacuum to atmosphere. Break vacuum
with dry nitrogen holding charge first. Do not exceed 5
psig.
4. Remove the control box cover.
5. Disconnect compressor power harness from inverter.
6. Remove service panel to gain access to unit wiring and
compressor compartment.
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This can
ELECTRICAL BURNOUT
1. Windings of compressor
open or grounded
2. Oil dark with burn odor
3. Symptoms Blows fuses or
circuit breaker Draws ab-
normal amount of current