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1. PM
Checklist
Check
box
2. Clean the drive’s
3. Clean air filters (if
a. Dirt coating drive circuit boards and other components can interfere with proper cooling
b. Corroded electrical connections can cause excess heat build-up, short circuits, erratic
c. This should be done after the installation of the drives is complete and before power
d. If the drive is installed in an area where a lot of construction work will be performed, it is
e. In a normal environment, the drive’s interior should be inspected annually and cleaned,
a. Many TR200 drives have no air filters. However, some sizes and enclosure styles do use
Trane TR200 Drive Preventive Maintenance
Instructions
Preventative Maintenance
Vacuum dust and dirt from heat sink
fins
Clean or replace as conditions require intake air filters (125 HP
torque models, 150 HP variable torque models and larger have
located behind the intake louver
panels)
Check ventilation fans for proper operation and clean as
Confirm VFD’s ventilation clearances have not been
Check electrical connections and re-torque as needed. If possible,
an IR thermal scan of the VFD’s power input and power
Check line
Check motor & output phase
Inspect DC buss capacitors (older
voltage
balance
drives)
Record the VFD’s parameter settings using
Confirm the VFD doors and covers are in place and properly
interior.
even provide a path for electricity to short out along unintended paths. This can cause
operation and possibly damage to drive
components.
MCT-10
Step
obstructed
output.
needed.
closed
constant
filters
perform
erratic
drive
operation, and even component
damage.
is
applied to the drive. The main point here is to ensure that no metal filings or
installation-related dirt are inside the drive or its option
enclosure.
to keep the drive covered while it is not in operation. Of course, if it is being used, the
other
drive
must be uncovered so that cooling air can be freely supplied to it. After the construction
complete it will be important to clean the interior of the drive. Low pressure, clean, dry air
similar commercial products can be used to clean dirt off of circuit boards. While a
vacuum
cleaner can be used to collect falling dirt, it is important to ensure that circuit boards are
damaged by the use of a powerful vacuum cleaner on the boards. Inspect drive
for dirt or
corrosion.
necessary. In dirty environments, more frequent inspection is required. The level of
connectors
dirt
found inside the drive can be used to dictate the frequency of inspections and cleanings
is
required.
air
filters in conjunction with their fan cooling systems. For these drives it is important
periodically inspect and clean or replace the filter
any).
to
element.
and
best
is
or
not
if
that
Trane TR200 Drive
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b. Because the loading of the air filters can vary dramatically from one installation to another,
is important to initially check the air filters frequently to establish the required
4. Check the tightness of
interval.
connections.
a. Loose power connections can cause extra heating and/or arcing. The heating
efficiency and can actually melt down connectors. The arcing can cause intermittent
and electrical noise. These can disrupt the operation of the
b. Loose or corroded ground connections can cause electrical noise problems. All of the
TR200
drives have some degree of electrical noise filtering. Some of this electrical noise is
to
sunk
as
earth ground. Without a reliable ground connection the noise filters cannot operate
designed. In addition, a poor ground connection can become a safety
c. Loose control wires can cause intermittent operation of equipment. Loose or
shielding
even cause the drive to trip
for signal wires can cause erratic operation of the drive. In an extreme case this
off.
d. The preventive maintenance procedure would involve first turning off power to the drive
waiting until the DC bus capacitors have discharged to a safe level. Then all of
accessible
should not be necessary to disassemble the drive to perform this
connections should be inspection for corrosion and checked for tightness.
e. This should be performed once the drive is installed and at least annually afterward. If
drive is subjected to vibration or wide temperature variations, it should be checked
5. Check cooling
frequently.
fans.
a. Cooling fans are used to remove heat from the drive. Proper operation of the cooling
helps ensure long drive life by keeping the drive’s components cool. The cooling
should be inspected at least annually, more frequently when the drive is exposed to
conditions.
b. Inspect the heat sinks, air inlets, and air outlets to ensure that there is an open path for
flow.
c. The cooling fans in many TR200 drives will turn themselves off when the drive’s temperature
is
low enough to not require forced ventilation. To check for proper fan operation if the fans
are
not running, remove power from the drive. When power is reapplied the fans should
and run for a few
d. Listen for unusual noises from the fans when they are
seconds.
e. The TR200 drives use a heat sink temperature sensor to help indicate if there is a problem
with
the cooling system. If the drive issues a HEAT SINK OVERTEMP. warning or alarm,
check
6. Check bus capacitors for voltage balance and/or physical
the cooling system
carefully.
a. The large DC bus capacitors in the drives are subject to deterioration over an
period of time. It generally takes a significant number of years before any problems
although high ambient temperatures and other factors can accelerate this
b. Problems with the DC bus capacitors generally first show up as a large “AC ripple
being superimposed on the DC bus. The TR200 6000 continually monitors for excessive
bus
ripple, so it will generally provide an early warning of bus capacitor problems. If the
gives a MAINS PHASE LOSS warning or alarm and a check of the input AC power
it to be balanced under loaded conditions, the DC bus capacitors should be
shows
carefully.
c. On drives with an input power line voltage of 380 V AC or larger, the DC bus capacitors
connected as two banks that are in series with each other. With power applied to the
the voltage across the positive half should be within 10% of the voltage across the
half.
running.
damage.
drive.
operation.
inspection
reduces
issue.
missing
extended
process.
the
more
system
voltage”
negative
currents
can
and
It
the
fans
extreme
air
start
occur,
DC
drive
line
checked
are
drive,
it
Trane TR200 Drive
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d. With power removed from the drive, a physical inspection of the capacitors should not
any deformation of the cases of the capacitors or liquid leaking from
them.
e. Low voltage capacitor testers are of no use in checking DC bus capacitors. The
concern is to ensure that the capacitors don’t have excessive leakage current when the
bus voltage is applied to it. This cannot be tested at a low
voltage.
f. If one capacitor on the DC bus is found to be weak or damaged, it is important to replace
entire capacitor bank. A capacitor with an excessive amount of leakage current
excessive stress on other capacitors in the
g. If it is convenient to access the two halves of the DC bus capacitors, the
bank.
inspection
technique given in “c” and “d” can be performed annually. Otherwise, it is best to simply
the drive’s internal monitoring circuitry described in “b” provide an indication of
problems.
show
main
DC
the
places
let
possible
Trane TR200 Drive
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