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Davey Speedman Dual Pump Variable Speed Pump Control System User Manual

Page 59

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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