Manitowoc 999 Service And Maintenance Manual

Reference Only
ELECTRIC SYSTEM 999 SERVICE/MAINTENANCE MANUAL
3-32
Published 05-16-17, Control # 233-03
Table 3-4 System Faults
Listed below are the faults which turn on the system fault alert (red light and beeper). When the alert comes on, the SYSTEM
FAULT group of the digital display will indicate which fault has occurred. Take corrective action. The beeper sounds
intermittently.
[1] Optional item
Display Reading Function Response Cause of Fault
BOOM ANGLE SENDER
All functions operable, but BOOM ANGLE and
BOOM TO LUFF JIB ANG display will be faulty;
correct cause of angle sender fault as soon as
possible.
Sender output voltage 0 volts or above 9.7
volts. Fault not active when crane is in
SETUP mode
ENGINE OIL PRESSURE
Does not affect operation. Correct cause of low
oil pressure as soon as possible to prevent
engine damage.
Oil pressure below 15 psi (1 bar)
ENGINE TEMPERATURE
Does not affect operation. Correct cause of
overheating as soon as possible to prevent
engine damage.
Engine coolant temperature above 205°F
(96°C)
HYD TANK FLUID TEMP
Does not affect operation. Reduce loads and/or
speeds to allow oil to cool.
Oil temperature in hydraulic tank above
180°F (82°C)
HYD TANK FLUID LEVEL
Does not affect operation. Fill tank as soon as
possible.
Hydraulic oil at CAUTION LOW LEVEL
indicated on tank gauge
MAIN CHARGE FILTER
All functions operable. Replace filters as soon as
possible.
Filters are dirty.
AUX DRUM CHRG FILTER
All functions operable. Replace filter as soon as
possible.
Filter is dirty.
FFALL FILTER Replace filter(s) as soon as possible. Filter(s) is dirty.
HYD SUCTION FILTER
Oil flow through suction screen inside hydraulic
tank blocked.
Remove blockage immediately or hydraulic
pumps will be damaged from cavitation
LUFF JIB ANGLE SEND [1]
All functions operable, but JIB ANGLE and
BOOM TO LUFF JIB ANG display will be faulty;
correct cause of angle sender fault as soon as
possible.
Sender output voltage 0 volts or above 9.7
volts. Fault not active when crane is in
SETUP mode.
MAST SYSTEM Mast is disabled.
Stop operating. Find causes of fault and
correct.

Manitowoc 999 Specifications

General

Brand	Manitowoc
Model	999
Category	Construction Equipment
Language	English