User guide

Appendix D

The final difference is the addition of a DIP switch SW4 which can be used to select a lower switch-

ing frequency. This could be used to improve the motor efficiency of submersible pumps, and overall

power consumption. This will also increase the audible motor noise. Before changing this switch the

AQUAVAR controller must be disconnected from the power supply. The switch settings are as follows:

Switch 1 Switch 2 Switching Frequency Switch 1 Switch 2 Switching Frequency

Off Off 8khz (standard) Off On 4khz

On Off 5khz On On 2.5khz

Pin Connection

(to display)

40 Pin Connection

(to power board)

DIP - Switch

SW 4

24VDC Output

(max. 800mA)

for External Fan

RS485

Terminals

Motor ConnectionControl Terminal Block

Main Supply Voltage

Main Parts of the Control Board (PN# 2509641)

Dip-Switch on the Controller Board

SW4: DIP-Switch to Select the Switching Frequency

Before switching, disconnect the power supply, otherwise the

AQUAVAR could be destroyed.

SW 4 Switching Frequency

1 2

OFF OFF 8 kHz (Standard)

ON OFF 5 kHz

OFF ON 4 kHz

* Recommended for submersible motors

ON ON 2.5 kHz*

and long motor lead lengths.

NOTE

Lower switching frequencies reduce heat in motor, but increase audible noise.

SW 4

ATTENTION