Technical information

TROUBLE SHOOTING
EN / M-SC3.5 / May 2010 25
DC warnings and failures Meaning What to do?
No failure None (no failure detected) --
UDC Bat low Battery voltage of the starter battery is too
low (flat battery)
Check battery voltage. Recharge the
battery, check battery charger. Inspect
battery terminals and cables for a good
electrical connection (inspect against
corrosion, tattered wires, etc.)
Charger failure Defective charger, charger fuse blown Check battery charger, check charger
fuse
Charger temp Internal temperature of battery charger
circuit on local control panel too high
Check battery charger
IDC Fuel high DC current through the fuel lift pump was
too high
Check fuel lift pump, check fuel valve.
Check for short circuit in wiring
IDC Stop high DC current through the pull to stop relay
was too high
Check pull to stop relay. Check for short
circuit in wiring
IDC Glow high DC current through the glow plug was too
high
Check glow plug. Check for short circuit in
wiring
IDC Start high DC current through the start solenoid was
too high
Check start solenoid. Check wiring to start
solenoid. Check for short circuit in wiring
UDC Fuel high DC voltage to the fuel lift pump was too
high
Check whether no external DC source is
connected to wiring to the fuel lift pump.
UDC Stop high DC voltage to the pull to stop relay was too
high
Check wiring to of pull to stop relay
UDC Glow high DC voltage to the glow plug was too high Check whether no external DC source is
connected to wiring to the glow plug.
UDC Start high DC voltage to the start solenoid was too
high
Check whether no external DC source is
connected to wiring to the start solenoid.
UDC Fuel low DC voltage to the fuel lift pump was too low Check for short circuits in the fuel lift
pump, check for short circuits in the
wiring.
UDC Stop low DC voltage to the pull to stop relay was too
low
Check for short circuits in the pull to stop
relay, check for short circuits in the wiring.
UDC Glow low DC voltage to the glow plug was too low Check for short circuits in the glow plug,
check for short circuits in the wiring.
UDC Start low DC voltage to the start solenoid was too
low
Check for short circuits in the start
solenoid, check for short circuits in the
wiring.