Xylem HYDROVAR WATERCOOLED User Manual
Page 19
19
Controller mode - constant pressure control:
In this mode the Hydrovar-Watercooled is controlling to a constant output pressure independent from the
required flow rate, but limited to the maximum performances of the pump. The integrated low water protection
shuts off the pump when the output pressure during operating of the pump is below 25% of the stored required
pressure for longer than 20 seconds. In that case the controller will shut off the pump and will show Error code 26
“Lack of water” (more information about Error codes you will find on page 14).
Adjustment of the required pressure:
Press (+) and (-) together for 3 seconds till all LEDs are illuminated.
The required pressure setting is now active and will be indicated by shining of LED 1 and 6. LEDs 3 and 4 in the
centre of the LED bar are blinking alternately.
1
2
3
4
5
6
Required pressure can be changed
Press (+) (=increase) or (-) (=decrease) to set the required pressure. The changing of the operating pressure of the
pump is shown on the manometer.
If no button is pressed for more than 10 seconds, the new setting will be saved automatically.
6
Error Messages
LED-Indication
Failure reason
Possible solution
Failure code 06
Under Voltage –
Supply voltage is too low
Check the cable and the terminals on the
supply side of the Hydrovar
Failure code 16
Processor Error
Software failure
Check the ground and earth connection and
the cabling that no signal cable is running in
parallel with a power cable
Failure code 26
Low Water
Output pressure is below 25%
of the required pressure
The incoming water flow rate or the suction
pressure is too low
Sensor Error
Check cable connection of the internal sensor
or changing of the complete pressure
measurement device (contact your service
partner)
Failure code 36
Over-Temperature Motor/
Over-Temperature Drive
PTC of the motor has detected
over-temperature or the
Hydrovar-Watercooled has
reached its maximum
temperature.
Ambient temperature is too high or cooling of
the motor is not efficient. Clean the cover and
the motor fan and read the manual of the
motor.
Temperature of the handled liquid is too high
or no flow through the Hydrovar-Watercooled
for efficient cooling.
1
2
3
4
5
6
1
2
3
4
5
6
1
2
3
4
5
6
1
2
3
4
5
6