RoboVent PFX Series, Owner'S Manual

Page: 37 / 52

ROBOVENT • PFX SERIES OWNER’S MANUAL 37
SECTION 900
VFD Maintenance Procedure
Preventative Maintenance of VFD
Ambient Temperature
Humidity
Dust
Harmful Gas
Oil Mist
Abnormal vibration or noise
Main circuit & control voltage
Loose lugs, screws & wires
Hot spots on parts
Corrosion
Bent conductors
Breakage, cracking or discoloration
Check spacing
Discoloration or Noise
Loose, damaged
Leakage
Ruptures, broken, expansion
Capacitance & insulation resistance
Noisy
Contact discoloration
Cracked
Discoloration
Speed reference voltage/current
I/O contact operation
Abnormal fan noise
Loose connections
Free of accumulation
LEDs
Monitor display values
Key functionality
Clean
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
Environment
Equipment
AC Power Supply
Conductors & Wire
Connections
Transformers & Reactors
Terminal Blocks
DC Bus Capacitors
Relays & Contactors
Soft Charge Resistors
Operation
Cooling Fans/Fins & Heatsink
Digital Operator
General
AC Power Circuit
& Devices
Control Circuits
Cooling System
Keypad/Display
INSPECTION POINT ITEM CHECK POINTS
EVERY
3-6 MONTHS
YEARLY
Table 8.3
Preventative Maintenance
If the Drive is used under the following conditions, it may be necessary to inspect
more often:
• High Ambient temperatures, humidity or altitudes above 3,300 feet
• Frequent starting and stopping
• Fluctuations of the AC power supply or load
• Excessive vibration and/or shock loading
• Poor environment, including dust, metal particles, salt, sulfuric acid, chlorine