Engcon DC2 QSC - Page 66

8 Troubleshooting
Symbol
Indication
Description
Action
Button not
pressedSlow
Flashes 1 time per
second (1 Hz)
Ground pressure sensor defect.
Alt 1: Wrong type of ground
pressure sensor selected.
Alt 2: (Digital ground pressure
sensor): NO and NC signals
show the same value.
Alt 3: (Analogue ground pressure
sensor): Sensor value is outside
the permissible range.
Alt 4: (CAN Sensor): Data
from the machine is corrupt or
incorrect or no data received in
the last 250 ms.
Alt 1: Configure the QSC to use
the type of ground pressure
sensor installed on the machine.
Alt 2: NO and NC signals indicate
different states.
Cause: Short-circuit, cable break
or disconnected ground pressure
sensor.
Button pressed
Steady light
The ground pressure sensor is
indicating ground pressure. Used
for testing and troubleshooting
the ground pressure sensor.
Button pressed
Extinguished
The ground pressure sensor
is not indicating ground
pressure. Used for testing and
troubleshooting the ground
pressure sensor.
Constant light
Machine lock selected via
configuration.
Extinguished
Machine lock deselected via the
configuration. The lock will not be
activated.
Fast
Flashes 10 times
per second
(10 Hz)
Activated 1: Excess current on
machine lock valve (has priority
over open load). More than
3500 mA passes to the activated
machine lock valve. The output
will be turned off.
Activated 2: One of the machine
lock outputs is short-circuited
either to earth or system voltage
while the machine lock is turned
off.
Confirmation 1: Automatic if less
than 3500 mA passes through
the machine lock valve when it is
reactivated.
Confirmation 2: When the system
is restarted.
Slow
Flashes 1 time per
second
(1 Hz)
Open load on machine lock
valve. The current is less than
200 mA when the machine lock
is activated.
Automatic when more than 200
mA passes through the machine
lock valve when it is activated.
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