26
Operation
Diagnostic information
The indicator for the diagnostic button starts to flash if the
diagnostic function registers malfunction in the EDC sys-
tem.
Corrective action:
1. Reduce engine speed to idle.
2. Acknowledge the message by pressing the diagnostic
button.
3. Release the diagnostic button and make a note of the
diagnostic trouble code (DTC) that is flashed out.
The diagnostic trouble code (DTC) remains stored as
long as there is a malfunction and can be noted later.
4. Look up the diagnostic trouble code (DTC) in the “Diag-
nostic function” chapter and carry out the recommend-
ed remedies accordingly.
Alternatively: If the gear control is functioning normally
and warning display and other instrumentation display
normal values, the operator can continue the journey
and remedy the malfunction at a later time.
NOTE! In the “Diagnostic function” chapter there is more
information about the diagnostic function, reading off diag-
nostic trouble codes (DTCs) etc.
Cruising speed
Avoid running at full speed to obtain the best operating
economy. We recommend a cruising speed of at least
200 rpm lower than the maximum rpm at full speed (wide
open throttle). The maximum rpm at full speed can vary
depending on choice of propeller, load and sea conditions,
etc., but should be within the wide open throttle range.
Wide open throttle range:
TAMD74C (Rating 3) .............................. 2400–2500 rpm
TAMD74C (Rating 4) .............................. 2500–2600 rpm
TAMD74L ............................................... 2400–2500 rpm
TAMD75P............................................... 2500–2600 rpm
There could be several reasons for the engine failing to
reach the wide open throttle range, see the chapter “Trou-
bleshooting”. Use a propeller with a greater pitch if the en-
gine speed exceeds the wide open throttle range. Get in
touch with your Volvo Penta dealer for advice.
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