McQuay AGZ026BS, Installation, Operation And Maintenance Manual

Page: 73 / 106

IOMM AGZ-5 AGZ 026B through 130B 73
VFD Monthly and Yearly Inspection Chart
Frequency
Item Inspected Check for ...
Month Year
Inspection Method Criteria
Ambient
environment Extreme Temperatures &
humidity
Thermometer, hygrometer
Ambient temperature
between – 10 to 40°C, non-
condensing
Major devices
Abnormal noise &
vibration
Visual & aural
Stable environment for
electronic controls
Overall
Power supply
voltage
Voltage tolerance
Digital volt meter, measure
between inverter terminals
[L1], [L2], [L3}
200V class:
200 to 240V 50/60 Hz
400V class:
380 to 460V 50/60 Hz
Ground Insulation Adequate resistance
Digital volt meter, GND to
terminals
5 Meg. Ohms or greater
Mounting No loose screws Torque wrench
M3: 0.5 – 0.6 Nm
M4: 0.98 – 1.3 Nm
M5: 1.5 – 2.0 Nm
Components Overheating Thermal trip events No trip events
Housing Dirt, dust Visual Vacuum dust & dirt
Terminal block Secure connections Visual No abnormalities
Smoothing
capacitor
Leading, swelling Visual No abnormalities
Relay(s) Chattering Aural
Single click when switching
ON or OFF
Resistors Cracks or discoloring Visual
Use Ohm meter to check
braking resistors
Noise Power down, manually rotate Rotation must be smooth
Main
circuit
Cooling fan
Dust Visual Vacuum to clean
Overall
No order, discoloring,
corrosion
Visual No abnormalities
Control
circuit
Capacitor No leaks or deformation Visual Undistorted appearance
Display LEDs Legibility Visual All LED segments work