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PAGE 20 — DCA-220SSJ/SSJU— OPERATION AND PARTS MANUAL — REV. #1 (01/06/09)
DCA-220SSJ/SSJU — DIAGNOSTIC DISPLAY
The diagnostic display panel located inside the control box
on the generator (Figure 6) is designed to meet the needs
for instrumentation and control of electronically controlled
engine communication using the SAEJ1939 Controller Area
Network (CAN). This diagnostic display is a multifunction
tool that enables equipment operators to view many different
engine parameters and service codes.
The keypad on the diagnostic display panel is a capacitive
touch sensing system. There are no mechanical switches to
wear or stick. This keypad (display unit) will operate in
extreme hot or cold weather conditions.
Other components in the system are microprocessor-based
components for displaying critical engine data broadcast by
an electronic engine or transmission’s Engine Control Unit
(ECU): engine RPM, oil pressure, coolant temperature,
system voltage, etc., and a combination audible alarm and
relay unit for warning and shutdown annunciation.
The Engine Control Unit (ECU) used with this generator
diagnosis engine faults that arise with the the engine control
system and the engine itself. Engine faults can be determined
by viewing the Diagnostic Trouble Codes (Active Fault Codes)
which are displayed on the Diagnostic Display Panel. See
the John Deere Engine Operator’s Manual for a complete
listing of active fault codes and countermeasures.
The following definitions describe the controls and functions
of the
Diagnostic Display
Panel
(Figure 6).
1. Menu Button – Press this button to enter or exit menu
screens.
2. Left Arrow Button– Press this button to scroll through
the screen either moving the parameter selection toward
the left or upward.
Figure 6. Diagnostic Display Panel
3. Right Arrow Button – Press this button to scroll through
the screen either moving the parameter selection toward
the right or downward.
4. Enter Key Button – Press this button to select the
parameter that is highlighted on the screen.
5. Emergency Stop LED – When lit (RED) indicates a
major fault has occured. This condition will shudown
the generator.
6. Warning LED – When lit (AMBER), indicates a engine
parameter has exceeded its limits (minor fault). The
generator will still run in this condition.
7. Display Screen – Graphical backlight LCD screen. Back
lighting is controlled via menu or external dimmer
potentiometer. The display can show either a single
parameter or a quadrant display showing four parameters
simultaneously.
8. Diagnostic Switch – When placed in the ON position,
will activate the diagnostic display panel.
9. CAN Diagnostic Connector – Controller Area Network
connector. This connector outputs diagnostic error
codes. Connect a scanner or similar device into this
connector to read error codes.
Display Parameters
The following are some of the engine and transmission
parameters displayed on the diagnostic disply panel.
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Engine RPM’s
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Engine Hours
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System Voltage
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% Engine Load at current RPM
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Coolant Temperature
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Oil Pressure
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Fuel Economy
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Current Fuel Consumption
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Throttle Position
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Engine Manifold Air Temperature
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Active Service Codes
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Set Units for Display (English or Metric)
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English Configuration Parameters.