Recommended Periodic Maintenance And Inspection; Visual Inspection - Power Removed; Operational Inspection - Power Applied - Trane RTHD Installation Instructions Manual

Recommended Periodic Maintenance and Inspection

Visual Inspection – Power
Removed
WARNING
Hazardous Voltage with Capacitors!
Failure to disconnect power and discharge capacitors
before servicing could result in death or serious injury.
Disconnect all electric power, including remote
disconnects and discharge all motor start/run
capacitors before servicing. Follow proper lockout/
tagout procedures to ensure the power cannot be
inadvertently energized. For variable frequency drives
or other energy storing components provided by Trane
or others, refer to the appropriate manufacturer's
literature for allowable waiting periods for discharge of
capacitors. Verify with a CAT III or IV voltmeter rated per
NFPA 70E that all capacitors have discharged.
1. Ensure the door interlocks are present and working.
2. Verify the safety ground connections to the door panels are
securely connected.
3. Inspect power wire cables and devices to assure no
abrasion is occurring from vibrations against chassis of
cabinets, or other edges.
4. Ensure the drive interior and exterior is clear of any dust or
debris. Fans, circuit boards, vents, etc. must be clean. Only
use a vacuum for cleaning. Do NOT use compressed air.
5. Inspect the interior of the drive for any signs of moisture
entry or leakage.
6. Visually inspect all drive components and wiring. Look for
signs of heat or failure (look for swelled or leaking
capacitors, discolored reactors or inductors, broken pre-
charge resistors, smoke or arc trails on MOVs and
capacitors, etc.)
7. Closely inspect the motor terminal board for any signs of
leakage, arcing, etc.
8. Check ALL cable/lug/terminal connections inside the drive
enclosure. Ensure all are clean and tight, and not rubbing
against each other anywhere.
SO-SVN048A-EN
Operational Inspection – Power
Applied
WARNING
Live Electrical Components!
Failure to follow all electrical safety precautions when
exposed to live electrical components could result in
death or serious injury.
When it is necessary to work with live electrical
components, have a qualified licensed electrician or
other individual who has been properly trained in
handling live electrical components perform these
tasks.
1. Verify the drive cabinet cooling fans are operating. This
should be done from outside the enclosure, by looking into
the cabinet at door and cabinet vents, to avoid electrical
hazards.
Note: The power module fan comes on with power. Other
fans cycle with drive operation.
2. Check historic fault codes using LCP connected to the
AFD.
3. Check configuration settings and confirm all proper
settings are still present in the controls.
4. Review the diagnostic history.
5. Make Chiller Service report to document all setpoints.
6. Check the UC800 alarm histories for any indications of
operational problems.
Do this every 1 to 12 months depending on
operating environment.
To properly diagnose service issues for Adaptive Frequency
Drives for centrifugal chillers equipped with AFDR starters, all
UC800 chillers will be equipped with the LCP as standard on
the drive power module. This is for service only and NEVER for
machine operation.
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