D-500L Firmware V-5.8
K35D03-EN - 138 -
The engine does not run after the first start attempt, then the unit does not start again and OIL
PRESSURE EXISTS ! message is displayed:
-The oil pressure switch closes very lately. As the unit senses an oil pressure, it does not start. When oil
pressure switch closes the unit will start. Optionally the oil pressure switch may be replaced.
When the AC mains fails, the engine starts to run but the unit gives START FAIL alarm and then
the engine stops:
-The generator phase voltages are not connected to the unit. Measure the AC voltage between
terminals GEN L1-L2-L3 and Generator Neutral at the rear of the unit while the engine is running. A
fuse protecting the generator phases may be failed. A misconnection may be occurred. If everything is
OK, turn all the fuses off, and then turn all the fuses on, starting from the DC supply fuse. Then test the
unit again.
The unit is late to remove engine cranking:
-The generator voltage rises lately. Also the generator remnant voltage is below 15 volts. The unit
removes starting with the generator frequency, and needs at least 15 volts to measure the frequency.
-The unit is also able to cut cranking from charge alternator voltage and oil pressure input. Please read
chapter “CRANK CUTTING”
The unit is inoperative:
Measure the DC-supply voltage between terminals BAT+ and BAT- at the rear of the unit. If OK, turn all
fuses off, then turn all the fuses on, starting from the DC supply fuse. Then test the unit again.
Programming mode can not be entered:
The program lock input disables programming mode entry. Disconnect the program lock input from
battery negative before modification. Do not forget to make this connection again to prevent
unauthorized program modifications.
Some program parameters are skipped:
These parameters are reserved for factory setting and cannot be modified.
AUTO led flashes and the genset does not run when mains fail:
The unit is in Weekly Schedule OFF time. Please check date and time setting of the unit. Please check
also Weekly Schedule program parameters.
The genset runs but does not take the load:
Check that the genset Yellow led is on steadily. Adjust genset voltage and frequency limits if necessary.
Check that the digital output-8 is configured as “Genset Contactor”
Check “Genset Contactor Timer” program parameter.
Check that a Genset Loading Inhibit input signal is not active. Check input functions. If an input is
configured as “Genset Loading Inhibit” then check the signal is not present at this input.
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