MDE142E0
47/60
06/04/04
15.2. The electronic control logic works but there is an alarm
In this case the information available on the local display help the operator in the trouble-shooting.
The alarm / warning table help the operator in understanding the reason of the alarm. The below table,
used in conjunction with the alarm / warning table (see par 6.2) shows the procedure to be used to
remove the alarm / warning.
ALARM LIST
Available Controls (*)
Display
Message
Condition for
alarm/Warning
Actions
Local
Remote
ESD
CONFIGURATION
(error)
The checksum of the
EEPROM memory that
contains the configuration is
wrong
Re-configure all parameters
not
available
not
available
not
available
INT.
TEMPERATURE
Temperature inside the
actuator enclosure greater than
90°C or lower then -40°C
Ambient temperature too high or
too low.
Verify insulation among actuator
and heat source
not
available
not
available
not
available
MAIN VOLTAGE
Main voltage lower than -20%
or greater than +20% of the
value stated in the main plate,
or wrong frequency
Check main voltage supply and
frequency on terminals L1 & L2
not
available
not
available
not
available
HARDWARE
(error)
The diagnostic program detects
some malfunction in the
electronic that controls the
actuator
Same circuit is damaged.
Change control card
not
available
not
available
not
available
POSITION
SENSOR
The valve position indication
is absent.
Electrical connection failed
Position transmitter is damaged or
external 24 Vdc failed
available
not
available
not
available
JAMMED IN CL
No position change after
having received a CLOSE
control
Check status of actuator and valve
process mechanical parts
available
only
open
only open
JAMMED IN OP
No position change after
having received a OPEN
control
Check status of actuator and valve
process mechanical parts
available
only
close
only close
REQUEST
SIGNAL
The position request signal
indication is absent or outside
of the 4-20mA limits.
Electrical connection failed
External set-point generator failed
available
not
available
available
VEM1 SENSOR
No position change after
having received a request
signal control
Hall sensor out-off range
Check solenoid valve coil status
Check solenoid valve Check Hall
sensor
not
available
not
available
could by
available
VEM2 SENSOR
No position change after
having received a request
signal control
Hall sensor out-off range
Check solenoid valve coil status
Check solenoid valve Check Hall
sensor
not
available
not
available
could by
available
PUMP FAILURE
The last pump is not able to
increase the pressure up to the
right value.
Check the hydraulic pump
not
available
not
available
could by
available
(*)
NOTE: PURGE allow to local control the actuator always if the supply voltage and hydraulic pressure are present.
