Reference
Only
Manitowoc
Published 05-16-17, Control # 233-03
10-17
999 SERVICE/MAINTENANCE MANUAL
TROUBLESHOOTING
10
Bank number not increased
by number shown.
Problem 15
Boom will not boom down, but will boom up.
POSSIBLE CAUSES
Boom maximum down limit opened; Minimum bail limit open; Pawl engaged; Pump is defective;
Block-up limit open; Control handle is defective; LMI circuit open; Speed sender is defective.
CHECKS
Check Diagnostic Screen D2 (see Diagnostic Display topic in section 3).
When applicable function was enabled…
Bank 1 changed by 4 (front) or 128 (rear) . . . . . . . . . . . . . . . . . . . . . . . . . . . Maximum bail limit
Bank 2 changed by 8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Maximum up limit
Bank number increased
by number shown.
Out
In
Visually check pawl.
Does RIN screen (bank 7) read 0?
No
Yes
Check for problem and repair limit
switch operation, wiring, or fuse.
Check for problem at fuse F6 or wiring.
Does RIN screen (bank 7) read 255?
Yes
No
Disconnect LMI boom cable at boom top. Test cable for
continuity across pins A to C for 12 volts from source.
Yes
No
Check RIN system for problem.
Repair switch or wiring.
Yes
No
Repair or replace switch
or wiring to PC.
Does diagnostic screen D2 (bank 7, boom pawl command)
change by 2 when moving brake park switch?
Check that D1 screen (bank 1) changed
by 4 to release pawl. See Problem 28.
Yes
No
Does diagnostic DRUM 4 screen (bank 1) approach
-100% handle control with handle moved forward?
Repair or replace control handle.
When moving applicable handle fully in both
directions, does A1 diagnostic screen (bank 3)
read 38 to 120 in lower or 136 to 215 in raise?
Yes
No
Repair or replace control
handle/wiring.
Continued on next page
Check jib shorting plug for continuity across pins A to C in
boom top junction box.
Yes
No
Replace junction box.
Reconnect LMI cable at boom top junction box.
Does RIN screen (bank 7) change from 0 to 255?
Replace shorting plug.
Yes
No
Check anti-two block switches.
Yes
No
Check load cell and anti-two
block switches for short circuits.
If problem returns and RIN screen (bank 7) changes
back to 0, disconnect all connections to boom top
universal junction box. After 5 minutes reconnect boom
cable. Does RIN screen (bank 7) change from 0 to 255
and remain for 10 minutes? (NOTE: Junction box has a
poly-fuse that is tripped and reset by temperature.)
Содержание 999
Страница 1: ...R e f e r e n c e O n l y Service Maintenance Manual Manitowoc 999 ...
Страница 2: ...R e f e r e n c e O n l y ...
Страница 4: ...R e f e r e n c e O n l y THE ORIGINAL LANGUAGE OF THIS PUBLICATION IS ENGLISH ...
Страница 173: ...R e f e r e n c e O n l y Manitowoc Published 05 16 17 Control 233 03 4 19 999 SERVICE MAINTENANCE MANUAL BOOM 4 ...
Страница 174: ...R e f e r e n c e O n l y BOOM 999 SERVICE MAINTENANCE MANUAL 4 20 Published 05 16 17 Control 233 03 ...
Страница 297: ...R e f e r e n c e O n l y ...
Страница 298: ...R e f e r e n c e O n l y ...