Troubleshooting - Vexve Hydrox HCU Remote Installation, Operation And Maintenance Instructions

9. Troubleshooting

The following table shows the most common and generic failures that may present themselves. If any
other problems occur, please contact Vexve Oy.
Alarm signal
Motor alarm
Maximum cycle time
Position sensor error
Max pressure reached
Duplicate valve
operation
Emergency Stop
(E-Stop) Activated
Table 20. Troubleshooting
www.vexve.com
Explanation Possible fault
Low / non-existent hydrau-
lic pressure, which means
that the valve does not
reach the end position
Electric motor failure
Actuator Fault / Something
stuck in the system
The valve does not
reach the end position
within maximum time.
No position detection of
open/close position
Maximum cycle time
exceeded
Position sensor is not con-
nected to the valve.
Position sensor is broken.
Trying to use more than
one valve operation at User activation.
a time.
Verification and measurement
Confirm pressure by studying the pres-
sure gauge. If the pressure is low: check
the control cabinet, the hoses and the
actuator that there are no leaks.
Check the motor rotation direction (the
direction of the arrow on motor). If the
engine is running: try to close the valve
with the hand pump to determine if the
problem is in the engine.
If the pressure gauge shows 150 bar
(maximum pressure): visually check that
the valve moves. If the valve is stuck in
the middle position, check the operation
of the actuator by disconnecting it from
the control cabinet. Check pipes to see
that the valve is not stuck from any other
reason.
The valve is fully open or fully closed, but
the position signal is not. First, check
the wiring. Then calibrate the position
transmitter.
Make sure that the maximum operating
time is long enough for the pump and
actuator combination.
Confirm that all the valves are active in
the system.
Confirm the operation and connection of
the sensor.
Confirm that Pmax for each valve is set
to a correct value. Else there might be a
restriction causing valve actuation hin-
drance. This can be due to contamination
in hydraulic oil or blockage of the valve.
Only one valve operation is allowed with
this system and all other user operations
regarding the valve actuation will be
discarded.
Someone has pressed the Emergency
Stop button in the cabinet. Release the
button and acknowledge the error.
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