Volvo Engine Instruments and Controls

Jun. 27, 2018

Instruments and Controls

Display Control Unit

The DCU control panel is available as an optional accessory for the EMS (Engine Management System) electronic control system. The DCU is a digital instrument panel which communicates with the engine control unit. The DCU has several functions, such as engine control, monitoring, diagnostics, and parameter setting. The menus in the DCU system can be used to check, and in some cases to set, a number of different functions in the EMS system.

NOTICE! Settings and what engine data that appears in the display may vary depending on installation and Volvo engine model.

NOTICE! The menus and illustrations shown here are the English version. The language can be changed, however; refer to the Setup menu.

Menus

There are several sub-menus under each main menu. There is not space for all the menu choices on the display. To scroll through the menus, use the 7 and 9 buttons on the display. Press the SEL button 8 to make a selection. Refer to the illustration on the previous page.

NOTICE! The Setup menu can be used to select the language that you want to use on the display.

Main menu

• Engine data, current engine data

• Preheat, manual activation of pre-heating. Must be activated with temperatures below 0°C (32°F)

• Governor mode, activation of droop

• Diagnostics, shows fault codes as text

• Trip reset, resets trip data

• Setup, parameter setting

• Information, shows the currently applicable hard/ software, data sets and engine identification for the engine and DCU data

Engine data

shows relevant engine data.

• Engine speed, can be controlled with the SPEED+ and SPEED– buttons (rpm)

• Charge pressure (kPa)

• Coolant temperature (°C)

• Charge air temperature (°C)

• Oil pressure (kPa)

• Oil temperature (°C)

• Engine hours (h)

• Battery voltage (V)

• Fuel consumption (l/h)

• Instantaneous fuel consumption (trip fuel) (l)

Preheat

manual activation of pre-heating. When it is activated, the EMS system senses at start-up if pre-heating is needed. For automatic pre-heating, refer to the Setup / Preheat on ignition menu.

NOTICE! Must be activated with temperatures below 0°C (32°F).

The pre-heating time is adjusted to suit the engine temperature, and can last for up to 50 seconds both before and after starting. Refer also to Starting procedure EMS 2.

• Press SEL, the text Preheat requested will be shown

• The display automatically returns to the Engine Data menu.

Governor mode

activates/shuts off droop. To set the droop level, refer to the Setup / Governor gradient or Governor droop menu.

• Select Isochronous mode or Droop mode with the SEL button.

Diagnostics

shows the error list containing the 10 latest active and inactive faults. The fault codes are shown as text on the display.

• Scroll through the fault list with the arrow keys.

Trip Data reset

resets trip data, such as fuel consumption.

• Press the SEL button to reset trip data

Setup

parameter setting in the engine's control systems. Different menus appear under Customer parameter, depending on whether Versatile or Gen set has been selected from Set application. See below.

The parameters that can be set/selected (choice is made with the SEL button) are:

• Set application, setting Versatile or Gen set. Depending on the selection made here, different menus will appear under Customer parameter.

• Unit, setting of units (metric or US imperial).

• Language, setting the language used on the display. Choose between English, French, German and Spanish.

• Stop energized to, setting of external stop input. Activated by Stop or Run.

Stop: The stop input must be connected to voltage to stop the engine.

Run: The stop input must be connected to voltage to run the engine.

• Customer parameter, setting alarm limits. Refer to Customer parameter / Versatile and Customer parameter / Gen set.

• Throttle input setting, setting of engine-speed control and voltage limits. Refer to Throttle input setting.

• Display setting, setting the display. refer to Display setting.

Customer parameter / Versatile

• Idle engine speed - setting idle speed.

• Preheat on ignition - activation of automatic preheating. The engine control system senses if preheating is needed and activates it directly at switchon.

• Governor gradient (Nm/rpm) - setting of droop level, when activated. For activation, refer to Governor

droop in the main menu.

• Oil temp warning limit (°C) - setting alarm limit for oil temperature.

• Coolant temp warning limit (°C) - setting alarm limit for coolant temperature.

Customer parameter / Gen set

• Primary engine speed - selection of engine rpm, 1500 or 1800 rpm.

• Preheat on ignition - activation of automatic preheating. The engine control system senses if preheating is needed and activates it directly at switchon.

• Governor droop (%) - setting of droop level, when activated. For activation, refer to “Governor droop” in the main menu.

• Overspeed limit (%) - setting of limit for overspeed alarm, % of set engine rpm.

• Overspeed shutdown - activation of engine shutdown with overspeed alarm. Refer to “Overspeed limit” to activate the alarm limit for the excess rpm alarm.

• Oil temp warning limit (°C) - setting alarm limit for oil temperature.

• Coolant temp limit (°C) - setting alarm limit for coolant temperature.

Throttle input setting

rpm control setting (throttle operation).

• Set throttle mode - OFF - engine rpm is controlled via the DCU panel. ext throttle input - engine speed is controlled with a potentiometer (accelerator). ext voltage input - engine rpm is controlled by an external unit.

• Set idle voltage (V) - idle voltage level setting.

• Set max voltage (V) - full throttle voltage level setting.