Preventative Maintenance; Preventive Maintenance - YASKAWA E7 Drive User Manual

Preventive Maintenance

Inspection Points
General
AC Power Circuit &
Devices
Control Circuits
Cooling System
Keypad/Display
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 dust, salt, sulfuric acid, chlorine
•
Poor storage conditions
Table 7.3 Preventive Maintenance
Item
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
Check Points
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 connectors
Free of accumulation
LEDs
Monitor display values
Key functionality
Clean
Maintenance 7 - 3
Every 3-6 Months Yearly
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