RoboVent Spire MLS-01-5500-10, Owner'S Manual

Page: 50 / 68

50 ROBOVENT • SPIRE SERIES OWNER’S MANUAL
SECTION 900
VFD Maintenance Procedure
Periodic Inspection of VFD
Check the following items during periodic maintenance:
• The motor should not be vibrating or making unusual noises.
• There should be no abnormal heat generation from the Drive or motor.
• The ambient temperature should be within the Drive specification
(-10°C to 40°C (14°F to 104°F)).
• The output current value shown in parameter U1-03 should not be higher than the
motor rated current for an extended period of time.
• The cooling fan in the Drive should be operating normally.
Always turn OFF the input power before beginning inspection. Confirm that the digital
operator indicators on the front cover have all turned OFF, and then wait an additional five
minutes before beginning the inspection. Be sure not to touch terminals immediately after
the power has been turned off. Doing so can result in electric shock.
WARNING:
Prior to removing any protective cover or wiring any part of the Drive, remove
all power sources, including main input power and control circuit power. Wait a minimum of
5 minutes after power removal, before removing any cover. The charge lamp located within
the Drive should be off prior to working inside. Even if the charge lamp is off, one must
measure the AC input, output, and DC Bus potential to insure safe levels prior to resuming
work. Failure to adhere to this warning may result in personal injury or death.
Clean off any dirt and dust with an air
gun using clean and dry air at a pressure
between 55-85 psi. Replace the boards if
they cannot be made clean.
Clean off any dirt and dust with an air
gun using clean and dry air at a pressure
between 55-85 psi.
Tighten loose screws and bolts firmly.
Reconnect the loose connectors.
Clean off any dirt and dust with an air
gun using clean and dry air at a pressure
between 55-85 psi.
Replace the capacitors or Drive.
Is there any conductive dirt or oil mist on
the PCBs?
Are the fins dirty or dusty?
Are all screws and bolts tight?
Are connectors tight?
Is there any conductive dirt or oil mist on
the modules or components?
Are there any irregularities, such as
discoloration or odor?
Control PCB
Terminal PCB
Power PCB
Gate Drive PCBs
Cooling fins
External terminals,
mounting bolts,
connectors, etc.
Input Diodes
IPMs
Output Transistors
DC bus capacitors
ITEM INSPECTION CORRECTIVE ACTION
Table 8.1
Periodic Inspection With NO Power Applied
Apply power to the Drive and conduct the following inspection.
Replace Cooling Fan
Is there any abnormal noise or vibration,
or has the total operating time exceeded
20,000 hours. Check UI-40 for elapsed
cooling fan operation time.
Cooling fan(s)
ITEM INSPECTION CORRECTIVE ACTION
Table 8.2
Periodic Inspection With Power Applied