DKG-309 User Manual
(11.05.2009)
14. TROUBLESHOOTING
The genset operates while AC mains are OK or continues to operate after AC mains are OK:
-Check engine body grounding.
-AC mains voltages may be outside programm
-Check the AC voltage readings by pressing the MENU button.
-Upper and lower limits of the mains voltages may be too tight.
Low Limit
and
Mains Voltage High Limit
-The hysteresis voltage may be given to excessive.
AC voltages or frequency displayed on the unit are not correct:
-Check engine body grounding, it is necessary.
-The error margin of the unit is +/
-If there are faulty measurements only when the engine is running, there may be a faulty charging
alternator or voltage regulator on the engine. Disconnect the charging alternator connection of the
engine and check if the error is removed.
-If there are faulty measurements
failed. Turn off the rectifier fuse and check
Phase-to-Phase AC voltages are not correct although Phase to Neutral volt
-Incorrect phase order. Please connect phase voltages in the correct order.
KW and cos
Φ
readings are faulty although the Amp readings are correct:
-Current transformers are not connected to the correct inputs or some of the CTs are
reverse polarity. Determine the correct connections of each individual CT in order to obtain correct KW
and cos
Φ
for the related phase, and then
Short circuit the outputs of unused Current Transformers.
When the AC mains fails the unit energizes the fuel solenoid, but does not start and OIL
PRESSURE EXISTS ! message is displayed
The unit is not supplied with battery (
-Oil pressure switch not connected.
-Oil pressure switch connection wire cut.
-Oil pressure switch faulty.
-Oil pressure switch closes too lately. If oil pressure switch closes, the unit will start. Optionally oil
pressure switch may be replaced.
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.
TROUBLESHOOTING
The genset operates while AC mains are OK or continues to operate after AC mains are OK:
voltages may be outside programmed limits, measure the phase voltages.
Check the AC voltage readings by pressing the MENU button.
Upper and lower limits of the mains voltages may be too tight. Check the parameters
ge High Limit
. Standard values are 170/270 volts.
The hysteresis voltage may be given to excessive. The standard value is 8 volts.
AC voltages or frequency displayed on the unit are not correct:
Check engine body grounding, it is necessary.
The error margin of the unit is +/- 3 volts.
If there are faulty measurements only when the engine is running, there may be a faulty charging
alternator or voltage regulator on the engine. Disconnect the charging alternator connection of the
check if the error is removed.
are faulty measurements only when mains are present, then the battery charger may be
failed. Turn off the rectifier fuse and check again.
Phase AC voltages are not correct although Phase to Neutral voltages are correct:
Incorrect phase order. Please connect phase voltages in the correct order.
readings are faulty although the Amp readings are correct:
Current transformers are not connected to the correct inputs or some of the CTs are
reverse polarity. Determine the correct connections of each individual CT in order to obtain correct KW
and then connect all CTs.
Short circuit the outputs of unused Current Transformers.
When the AC mains fails the unit energizes the fuel solenoid, but does not start and OIL
EXISTS ! message is displayed:
The unit is not supplied with battery (-) voltage at the oil pressure input.
Oil pressure switch not connected.
switch connection wire cut.
Oil pressure switch closes too lately. If oil pressure switch closes, the unit will start. Optionally oil
pressure switch may be replaced.
The engine does not run after the first start attempt, then the unit does not start again and OIL
EXISTS ! message is displayed:
The oil pressure switch closes very lately. As the unit senses an oil pressure, it does not start. When
the unit will start. Optionally the oil pressure switch may be replaced.
V-02
- 43 -
The genset operates while AC mains are OK or continues to operate after AC mains are OK:
ed limits, measure the phase voltages.
Check the parameters
Mains Voltage
If there are faulty measurements only when the engine is running, there may be a faulty charging
alternator or voltage regulator on the engine. Disconnect the charging alternator connection of the
only when mains are present, then the battery charger may be
ages are correct:
Current transformers are not connected to the correct inputs or some of the CTs are connected with
reverse polarity. Determine the correct connections of each individual CT in order to obtain correct KW
When the AC mains fails the unit energizes the fuel solenoid, but does not start and OIL
Oil pressure switch closes too lately. If oil pressure switch closes, the unit will start. Optionally oil
The engine does not run after the first start attempt, then the unit does not start again and OIL
The oil pressure switch closes very lately. As the unit senses an oil pressure, it does not start. When
the unit will start. Optionally the oil pressure switch may be replaced.
