Starting Sequence - Technical Notes - Lowara GEMK Serie Instrucciones Para La Instalación Y El Uso

19. When the engine is
running, the starting
motor remains on
20. The diesel pump
does not stop from the
key-operated control
21. The control unit
display shows AUTO
operation even when
the position of the
selector switch is
changed
22. The control unit
display does not show
the engine revolutions
23. The heater does
not work
24. Diesel pump does
not start in automatic
mode
25. Diesel pump does
not start
26. Diesel pump does
not start when an
emergency start button
is pressed
11. STARTING SEQUENCE – TECHNICAL NOTES
The starting sequence of the diesel pump in AUTOMATIC MODE is as follows:
1. Selector switch set to "AUT" position
2. The engine is started only if the starting pressure switch changes status. Warning light lit of pressure switches installed in the
front of control panel
3. If there is a request to start, the control board commands the starting motor to start-up the engine. If the engine does not
start, the board makes max 6 attempts to start, each lasting 10 seconds (each attempt is made by alternating the activation
of the two starting relays). If the engine has not started after the 6 automatic start-up attempts, the failure-to-start alarm is
triggered (and indicated on the display and LED).
4. When the motor is running, the board checks the rpm's and if they exceed the starting threshold the pump-running indicator
light comes on (indicated on the display) and the starting motor is automatically disconnected.
The starting sequence of the diesel pump in MANUAL MODE is as follows:
1. Selector switch set to "MAN" position
2. Press the START button on the board which commands the starting motor. Each time you press the button the selection of
the start battery changes by closing the corresponding starting relay contact. If the engine starts and the operator keeps
holding down the button, the control board commands the automatic disconnection of the starting motor. If the engine is
running (pump running indicator light on) the starting motor does not activate. If the engine does not start immediately, there
is no maximum time limit for Manual starting, it is up to the operator.
3. With the engine running, the board checks the rpm's and, if they exceed the starting threshold, the pump-running indicator
light comes on (indicated on the display) and the starting motor is disconnected.
1. Control unit faulty
2. The engine pick-up is
disconnected or damaged
3. The control unit revolution
counter is not properly
calibrated
1. The KA1 relay for electric stop
device control is faulty
2. Electric stop device faulty
3. An emergency button (green
button on panel) has been
pressed
1. Control unit faulty
2. Selector switch contact
connections loose or
disconnected
1. Control unit faulty
2. The engine pick-up is
disconnected or damaged
1. Check the electrical
connection
2. Check the QU2 fuse in the
control panel
1. Selector switch is not set to
"AUT"
1. Check fuel level
1. Battery discharged or
disconnected
2. Starting relay blown
3. No diesel oil supply
Refer to authorized personnel
Refer to authorized personnel
Refer to authorized personnel
Replace
Replace
The diesel pump must be stopped by operating the stop lever,
otherwise check the operation of the electric stop device.
Replace.
Check the connections (refer to enclosed wiring diagram).
Replace
Connect pick-up or replace
Clean, examine and tighten the nuts on the battery terminals.
Install a new battery if none is present or if the one being
used is discharged.
Replace and refer to authorized personnel
Check fuel cutoff valves and level in the tank.
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