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Maintenance
Optional AFD
Periodic Maintenance and Inspection
AFD periodic maintenance and inspections should be
performed every 1–12 months, depending on operating
environment.
Visual Inspection — Power Removed
WARNING
Hazardous Voltage w/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.
Important:
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.
72
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 AFD control panel
(LCP).
Note: The AFD control panel is used ONLY for service and
should never be used for machine operation.
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 Symbio™ 800 alarm histories for any
indications of operational problems.
Choke Inspection
As needed, replace the magnetic choke if there is physical
damage (for example, cracks).
RTHD-SVX01K-EN
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