Davey Speedman Dual Pump Variable Speed Pump Control System User Manual
Page 59

59
Pump shutting down on
Pump Protection
•
Fault in protection sensor
•
Replace or adjust sensor
Controller powers on and
off continuously
•
Voltage being applied to the
Inputs.
•
Excessive current being
drawn from the external
pressure sensor
•
Make sure that the Inputs are Voltage
Free
•
Check external sensor current 100mA
max.
Can’t tune the set point
above/Below a number
•
The set point must be
between the Cut In pressure
and the High Pressure limit
•
Adjust HP limit or Cut In pressure to allow
the Set point to move
•
Check Set Point 2 & 3 to make sure that
they are not above HP Limit or below Cut
In pressures
System Displays wont
initialise
Loading Data message
cycles continuously
•
System needs to be
initialised.
•
Press the “Commissioning Button” on the
PCB whilst powering up the system to
initialise the program
•
System Pressure not
displaying
•
Analogue circuits not
functional
•
There are 2 LED’s located on the front
top right of the PCB. One is for Power
which should be flashing – the other is for
indication that the analogue circuit is
operational. Solid light means OK- No
light means inoperative.
PROBLEM
CAUSE
SOLUTION
INSTALLATION NOTES
Here are some “GOLDEN RULES” in site installation that should be followed.
Site Installation
•
Select the site most shaded and out of direct sunlight. Heat is a VSD killer.
•
Allow the airflow from the fans to be unimpeded.
•
Always connect the motor earth directly to the earth within the VSD.
•
Inputs
•
Connect the shield to EARTH and one end only.
•
Never apply voltage to the Inputs.
•
Take care in running inputs for long distances.
•
The inputs use a 24VDC signal as the carrier voltage - use compliant sensors.
•
Outputs
•
5 amp maximum switching load.
•
Check the programming on each output before trying to troubleshoot.
•
Start-up
•
CHECK ROTATION CHECK ROTATION CHECK ROTATION CHECK ROTATION
All these items are site related