CVH8, HVH8, TVH8, VA9, HVA9, TVA9: APPLICATION GUIDELINE & SERVICE MANUAL
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
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COMPRESSOR REPLACEMENT
The following is a recommended procedure for compressor replacement.
Always refer to the unit product installation, start-up & service
instructions for detailed procedures.
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. This can 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:
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.
7. Cut the wire tires securing the compressor power harness to the
control box. Remove compressor power harness (from control box).
Replace wire tie with one supplied; do not fasten at this time. The
second wire tie for the choke on the compressor is supplied with
new harness on the replacement compressor (highlighted with the
yellow circles below).
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
!
ERSONAL 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
!
ELECTRICAL OPERATION 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.
WARNING
!
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.
MECHANICAL FAILURES
ELECTRICAL BURNOUT
1.
No damage to windings as
indicated by electrical check
1.
Windings of compressor open
or grounded
2.
Oil clean and odor free
2.
Oil dark with burn odor
3.
Symptoms:Excessive Noise
Won’t Pump
Excessively Hot
3.
Symptoms Blows fuses or
circuit breaker Draws
abnormal amount of current
