Manitowoc Published 06-24-16, Control # 241-01 3-89
2250 OPERATOR MANUAL OPERATING CONTROLS AND PROCEDURES
• Glow Plug Symbol (amber) (5)—The glow plug symbol
is illuminated when the glow plugs are energized.
• Engine Failure Symbol (red) (6)—The engine failure
symbol is illuminated when the engine fails to start or
when the engine stalls.
• Engine Oil Pressure Symbol (red) (7)—The engine oil
pressure symbol illuminates steadily when the engine oil
pressure is low, and it blinks when failure of the engine
oil pressure switch is detected.
• Engine Coolant Temperature Symbol (red) (8)—The
engine coolant temperature symbol illuminates steadily
when the engine is overheating.
• Maintenance Reminder Symbol (amber) (9)—The
maintenance reminder symbol illuminates when the
engine run time reaches 500 hours. Holding the reset
button for five seconds will reset the 500-hour
maintenance reminder.
Control Panel Screens
See Figure 3-68 for the following information.
There are four different screens that can be viewed on the
control panel display. The left button (12) is used for scrolling
through the different screens. The center button (11) and the
right button (10) are used for accepting the text above the
button. The screens will show up in the following order.
1. APU Monitor Screen (13)—The APU monitor
screen is the default screen. After 10 seconds of
inactivity, the display will return to this page. This
screen will display the following:
• Alternator voltage
• Engine rpm
• Ambient temperature
• Engine hours
2. APU Output Screen (14)—The APU output screen
will display the following:
• Alternator voltage
• Generator output, Leg1,V/A/KW
• Generator output, Leg2,V/A/KW
• Generator frequency
3. Fault Screen (15)—The fault screen displays the
fault codes in J1939 SPN-FMI format. The user can
reset any non-active faults by pressing the reset
button. Hold the reset button for five seconds to
reset the 500-hour maintenance reminder.
4. Software Version/Display Setting Screen (16)—
The software version/display setting screen is used
to adjust the display contrast as well as software
revisions.
Control Module
The auxiliary power unit (APU) control module’s inputs will
provide initial power to the micro-controller and allow exit
from standby mode when run signals are provided. This
allows very low current draw while in standby mode. The
APU control module features a J1939 port, which allows
communication with the display in the APU control panel and
the crane control panel.
Fault Codes
The APU control module supports J1939 DM1 diagnostic
trouble codes (DTC). DTCs used in the APU system are
expressed below in SPN-FMI format (see Table 3-13
).
Table 3-13. DTCs
Code Description
100-0
APU engine oil pressure fault, signal above
normal (defective oil pressure switch)
100-1
APU engine oil pressure fault, signal below
normal (low oil pressure while running)
110-0
APU coolant temperature fault (coolant over
temperature)
171-0 Ambient air temperature higher than
171-1
Ambient air temperature lower than
expected
190-0 Engine speed higher than expected
190-1 Engine speed lower than expected
632-5 Fuel relay current lower than expected
632-6 Fuel relay current higher than expected
676-5 Glow plug relay current low
676-6 Glow plug relay current high
677-5 Starter relay current lower than expected
677-6 Starter relay current higher than expected
2436-1 Generator frequency lower than expected
2436-0 Generator frequency higher than expected
3353-1
12 V alternator output fault (not producing
power while engine is running)
3354-1
12 V alternator output fault (not producing
power while engine is running)
520220-31
Interlock input fault (start attempted while
access doors are not closed)
520221-5
Display power supply output current lower
than expected
520221-6
Display power supply output current higher
than expected
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