Troubleshooting - Deif SGC 420 Mk II User Manual

12. Troubleshooting

General troubleshooting
Fault
The controller does not power ON.
The controller display is not
responding.
The controller fails to crank-start
the engine.
The emergency stop alarm is
shown without the emergency stop
is activated.
The controller generates
unnecessary shutdown alarms or
warning alarms.
The controller shows Charging Alt
Fail alarm.
The controller shows Error C03.
1. The controller shows the genset
is ON while the genset is
stopped.
2. The controller shows the Fail to
stop alarm when the genset is at
rest.
The controller sends a crank-start
command immediately after power
ON.
User manual 4189341360A EN
Action
• Check the battery voltage.
• Check the fuse on the battery supply.
• Check continuity between battery positive and controller terminal 2.
• Check continuity between battery ground and controller terminal 1.
• Reset the controller power.
• Check the battery voltage.
• Go to the Configuration menu on the controller. Make sure the start output is
configured correctly. Measure the output voltage to make sure the output is
working.
• Go to the Configuration menu on the controller. Make sure the crank disconnect
method and the LLOP switch polarity are configured correctly. Make sure that the
lube oil pressure switch and sensor are working correctly. Do a check of the
wiring for the switch and sensor.
• Check if the Emergency stop switch is working correctly, including the wiring.
• Enter the Configuration mode in the controller and verify the configuration of the
Emergency stop polarity.
• Check the respective switch, sensor and wiring.
• Go to the Configuration menu. Make sure the threshold values for the alarms and
warnings are configured correctly.
• To check if the controller's charging alternator terminal is working:
◦ Disconnect the charging alternator wiring to the controller's terminal 10.
◦ Short the terminal 10 to the ground through a DC ammeter.
◦ Crank-start the engine.
◦ The DC ammeter should indicate the current in the range of 200 to 400 mA
for ~30 seconds.
◦ If yes, the controller's charging alternator terminal is working correctly.
• Disconnect and re-connect the charging alternator ind connection to the
controller's terminal 10.
• Check if the charging alternator is working corrctly.
Error C03 can occur if the controller is disconnected from the PC during a
configuration.
1. Push and hold the Stop/Config
controller.
2. Re-send the configuration file.
• Go to the Configuration menu on the controller. Make sure the LLOP and LOP
parameters are configured correctly. Check the wiring.
• Make sure that the mains voltage wiring is not connected to the genset voltage
terminals on the controller.
• Make sure the output terminal on the controller is not directly connected to the
starter relay. The output on the controller should be connected to an
intermediate relay. The intermediate relay should provide power to the starter
relay. Failure to do this can cause permanent damage to the controller.
button during a power cycle to reset the
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