Manitowoc 999, Service And Maintenance Manual

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Reference
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ELECTRIC SYSTEM 999 SERVICE/MAINTENANCE MANUAL
3-28
Published 05-16-17, Control # 233-03
DISPLAY READINGS
The display allows the operator to monitor three groups of
crane information: operating conditions (normal and
diagnostic), operating limits, and system faults.
Depress top or bottom of digital display selector to scroll up
or down through the display readings. Release the selector
when the desired information is displayed.
To access the diagnostic screens:
1. Turn limit bypass key clockwise and hold.
2. Scroll up at least one screen, release key, and scroll up
or down until desired screen appears.
To turn off diagnostic screens:
1. Turn limit bypass key clockwise and hold.
2. Scroll down at least one screen and release key.
Stopping engine will also turn off diagnostic screens.
See Table 3-5 for a list of abbreviations used in the tables.
See Table 3-6 for drum and pump identification.
Operating Conditions
Table 3-2 lists operating conditions which can be displayed
and the normal operating range of each.
When an operating condition is selected (such as ENGINE
SPEED), the current status of the condition displays (see
Figure 3-9 ).
Operating Limits
Table 3-3 lists operating limits which can be displayed.
When one or more operating limits is reached, the operating
limit alert (yellow light and buzzer in cab) turns on to warn the
operator. At the same time, the operating limit display
immediately appears (see
Figure 3-10 ) and automatically
scrolls through the names of the limits, stopping at each for
approximately three seconds.
The operating limit alert turns off when the cause of each
limit is corrected. The name of each limit reached during
operation is retained in memory, however,
until two things
happen :
1. Name of limit appears on display at least once.
2. Cause of limit is corrected.
For this reason, it is normal for the names of limits to appear
when you scroll to the operating limit group, even when the
operating limit alert is off.
To erase the names of inactive limits, scroll to the operating
limit group. Wait until the display scrolls through the name of
each limit. The names of inactive limits will be erased
automatically. If the alert is on, only the names of active limits
will remain.
NO FAULT appears on the display (see Figure 3-11 ) when
no limits have been reached.
FIGURE 3-9
ENGINE SPEED
900 RPM
FIGURE 3-10
OPERATING LIMIT
BLOCK UP
FIGURE 3-11
OPERATING LIMIT
NO FAULT