ZF Marine ClearCommand 9000 Series, Инструкция по установке, эксплуатации и устранению неисправностей, Страница: 195 / 272

TROUBLESHOOTING
PageB5-2
should be greater than 12.4 Volts in 12 VDC systems and
24.8 Volts in 24 VDC systems. If not, the battery or it’s
charging system needs servicing.
D) The voltage differential between the power source and the
Processor should not exceed 1.2 Volts in 12 VDC systems
and 2.4 Volts in 24 VDC systems. If so, there is high resis-
tance somewhere between the battery and Processor.
E) High resistance, resulting in a differential voltage of 1.2
Volts (12 VDC Systems) or 2.4 Volts (24 VDC Systems) or
greater, may be the result of corroded or tarnished connec-
tions, dirty or pitted relay contacts or an improperly sized
power cable.
F) If the voltage differential is less than 1.2 Volts (12 VDC Sys-
tems) or 2.4 Volts (24 VDC Systems), which is what you
would typically expect, a loose connection may exist
between the power source and the Processor. The vibra-
tion experienced while the vessel is underway may inter-
mittently cause the circuit to open. Check all the
connections between the power source and the Processor
for a loose bolts, nuts, etc.
B5-1.2 One Long - Three Short Tones
This tone indicates that there is an invalid command signal at the
Station-in-Command.
The Processor expects a DC voltage, representative of the Control
Head’s present lever position. This voltage is referred to as the
“Command Signal”. In normally functioning Control Heads, the
command signal is between approximately 0.8VDC at Full Astern
to 4.10 VDC at Full Ahead.
The command signal is converted by the Processor to a digital
representation, referred to as an A/D Count. More on A/D
Counts later. If the command signal drops below 0.6VDC or
exceeds 4.40 VDC, the tone will be generated.
At the same time the tone is heard, throttle command drops to
Idle and the clutch will be commanded to Neutral. The following
items will cause this to occur:
• An open or high resistance connection between the Control Head
and Processor.
• Out of calibration Control Head.
• A defective Control Head.
• A defective A/D Converter in the Processor.
The exact cause of the malfunction can be found as follows:
NOTE: I
F AN
APS
IS BEING UTILIZED IN THE POWER CIRCUIT
,
TAKE INTO ACCOUNT THE
0.7 VDC
FOR
-
WARD VOLTAGE DROP OF THE DIODES
. T
HIS WOULD INCREASE THE PERMISSIBLE DIFFERENTIAL
BETWEEN POWER SOURCE AND
P
ROCESSOR FROM
1.2
TO
1.9 VDC
IN
12 VDC
CIRCUITS AND
2.4
TO
3.1 VDC
IN
24 VDC
CIRCUITS
.
Figure B5-15: One Long - Three Short Tones