DCU 205 User’s Manual
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9.
T
ROUBLE SHOOTING
Symptom
Possible cause
Action
1.
The engine does not
start manually.
1. Low battery capacity.
2. Blown fuse.
3. START DISABLED
indication.
4. RUNNING indication.
1. Charge the battery, replace if
defective.
2. Wait approx. 20 seconds.
3. RESET alarms.
4. Check oil pressure switch and
its connections, terminal no. 5.
2.
The engine does not
start automatically.
1. Low battery capacity.
2. Control Unit not in
STANDBY mode.
3. Missing AUTOMATIC
START signal.
1. Charge the battery, replace if
defective.
2. Set the Unit in STANDBY
mode.
3. Check connections to terminals
21-22, or the signal source.
3.
The RUNNING lamp
is lit when the engine
is stopped and the
SPEED SENSOR
FAILURE alarm is
activated.
1. Lost connection between oil
pressure shutdown switch
connected to terminal 5.
1. Check the oil pressure switch
and its connections. There
should be connection between
terminals 2 (negative) and 5 on a
stopped engine.
4.
The SPEED SENSOR
FAILURE alarm
comes on while the
engine is running.
1. Lost connection to terminal 3
and/or 4.
2. Signal too weak.
1. Check relevant cables.
2. The signal must be at least
2.0VAC. Adjust or change
tachogenerator.
5.
The common alarm
relay is activated
without any indication
on the control panel.
1. Blown fuse.
2. Control Unit fault.
1. Wait approx. 20 seconds.
2. Check that the lamp marked
CONTROL on the back panel of
the unit is flashing. Turn power
off and on again. If the lamp
does not flash, contact
distributor.
6.
Simultaneous alarm
for SUPPLY
VOLTAGE LOW,
SPEED SENSOR
FAILURE and
AUTOMATIC START
FAILED.
1.
The CIRCUIT fuse is blown.
2.
DCU 205 malfunction.
1. Wait approx. 20 seconds.
2. Contact distributor.
Table 9-, Trouble shooting table
Further, please verify the following:-
•
Verify that the Control Unit has the correct voltage and polarity.
•
Make sure the battery is connected in such a way that the Control Unit is
sourced from the battery,
not
the
battery charger
only.
