92
Chapter 2 Inspection
■
CH Meter: Start Times/Operating Hour Display Device
Contactor ON/OFF (lowering) times and operating hours
(motor energizing hours for lowering × 2) are displayed.
Use these values for control of operating condition and
maintenance at inspection and periodic inspection.
<How to use the CH Meter>
Open the controller cover and press the button at the side
of the terminal panel.
The display
①
,
②
and
③
appears in the LCD window in
the sequence and then disappears automatically.
①
Operating hours (1,089 hours in the right example)
③
+
②
Number of start (2,031,091 times in the right example)
NOTE) For the operating hours and the number of start of the dual speed VFD model, refer to the separate “VFD
Manual” to check the operating hours and the number of start.
Check of Operating Hours and Number of Start (CH Meter)
①
②
③
H
lower digits
upper digits
C
Number of
starts
-
Readout sequence
Hoist's on time in hour
Display on LCD window
Button
Periodic Inspection (continued)
■
Guidelines on Bearing Replacement
Operating hours to replace parts
Body size grade
Every 800 hours Every 1600 hours Every 3200 hours
M6, 3m – – Parts replacement
M5, 2m – Parts replacement –
M4, 1Am Parts replacement – –
■
Guidelines on Hook and Yoke Replacement
Replace the Hook and Yoke in accordance with the rate of loading and the number of start in the following table.
Number of start to replace parts
Rate of loading
Every million
times
Every 1.5 million
times
Every 2 million
times
Light
A case where the capacity is rarely applied. Usually the hoist is
used with a light load.
○
Medium
A case where the capacity is applied considerably frequently.
Usually the hoist is used with a medium load.
○
Heavy
A case where the capacity is applied considerably frequently.
Usually the hoist is used with a heavy load.
○
Ultra
heavy
A case where the capacity is applied constantly.
○
■
Guidelines on V ring Inspection
Apply grease MOLITHERM No.2 on the V ring when the operating hours reaches at every 200 hours.
Refer to “Product Structure and Name of Each Part” (P122) for the location of the V ring.
Check of Operating Hours and Number of Start
2
■
Guidelines on Motor Shaft (with Rotor) Replacement
Operating hours to replace parts
Body size grade
Every 400 hours Every 800 hours
Every 1600
hours
Every 3200
hours
M6, 3m
– Apply grease on spline * – Parts replacement
M5, 2m
– Apply grease on spline Parts replacement –
M4, 1Am
Apply grease on spline Parts replacement – –
*Grease needs to be applied on spline part every 800, 1600 and 2400 hours.
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