Ingersoll-Rand TRANE AFDJ, Инструкция по установке, эксплуатации и обслуживанию

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AFDJ-SVU01D-EN 53
Maintenance
Preventive Maintenance Check
List
The preventive maintenance activities on the PF7000 Air-
Cooled Drive (“A” Frame or “B” Frame) can be broken
down into two categories:
• Operational Maintenance—can be completed while
the drive is running.
• Annual Maintenance—should be completed during
scheduled downtime.
Operational Maintenance
This process really involves only one task: Changing or
Cleaning the Air Filters. The PF7000 drives require
consistent, unrestricted airflow to keep the power devices
cool. The air filter is the main source of blockage in the air
path.
The drive will provide an air filter alarm whenever the
pressure differential across the devices drops to a drive-
specific level. Referring to the Air Filter Block parameter,
this can be anywhere from 7 percent to 17 percent
blocked, depending on the heatsink and device
configuration. This may seem like a small number, but it
takes significant blockage to begin to lower the voltage
from the pressure sensor. The percentage is a measure of
voltage drop, and should not be viewed as a percentage of
the opening that is covered. They are not related linearly.
Note: Once you receive an Air Filter Warning, you should
immediately make plans to change or clean the
filter. You should still have days or weeks until the
drive reaches an Air Filter Fault, but this is
dependent on site-specific particle conditions. This
can be done while the drive is running. Always
contact Trane Services and/or refer to the drive
literature supplied with the MV drive.
Annual Maintenance
As the name implies, these maintenance tasks should be
performed on an annual basis by a qualified MV drive
technician. These are recommended tasks, and depending
on the installation conditions and operating conditions,
you may find that the interval can be lengthened. For
example, we do not expect that torqued power
connections will require tightening every year. Due to the
critical nature of the applications run on MV drives, the key
word is preventive. Investing approximately 8.0 hours per
year on these tasks is time well spent in adding insurance
against unexpected downtime.
Initial Information Gathering by Qualified MV
Drive Technician
Some of the important information to be recorded via
Rockwell Service tool includes:
• Print Drive Setup
• Print Fault/Warning Queues
• Save Parameters to NVRAM
• Save Parameters to Operator Interface
• Circuit Board Part Numbers / Serial Numbers / Revision
Letters
1
Physical Checks (NO Medium Voltage and NO
Control Power)
Important:
• Before servicing, disconnect all power sources and
allow at least 40 minutes for capacitors to discharge.
• All electrical enclosures-unit or remote-are IP2X.
• Power Connection Inspection
– Inspect PF7000 drive, input/output/bypass
contactor sections, and all associated drive
components for loose power cable connections and
ground cable connections: torque them to the
required torque specifications.
– Inspect the bus bars and check for any signs of
overheating/discoloration and tighten the bus
connections to the required torque specifications.
– Clean all cables and bus bars that exhibit dust build-
up.
– Use torque sealer on all connections.
• Carry out the integrity checks on the signal ground and
safety grounds.
• Check for any visual/physical evidence of damage and/
or degradation of components in the low voltage
compartments.
– This includes Relays, Contactors, Timers, Terminal
connectors, Circuit breakers, Ribbon cables,
Control Wires, etc.; Causes could be corrosion,
excessive temperature, or contamination.
1
This only needs to be recorded if parts have been modified or changed since the last Preventive Maintenance activities.
WARNING
Hazardous Voltage!
Failure to disconnect power before servicing could
result in death or serious injury. Disconnect all electric
power, including remote disconnects before servicing.
Follow proper lockout/tagout procedures to ensure the
power can not be inadvertently energized.