Xylem IM043 AQUAVAR Variable Speed Pump Control - Manual (Page 80)

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
79
Pin Connection
(to display)
40 Pin Connection
(to power board)
DIP - Switch
SW 4
24VDC Output
(max. 800mA)
for external Fan
RS485
Terminals
Motor Connection Control 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
2
1
8
ATTENTION