Other Failures And Possible Causes; Maintenance And Notes - Xylem HYDROVAR Watercooled Installation And Operating Instructions Manual

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Failure code 46
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Failure code 56
After remedy of the failure reason it is necessary to switch on the Hydrovar-Watercooled.
Please contact your distributor if the same failure occurs more often. Give a detailed description of the error, the
failure code and the serial number of the Hydrovar-Watercooled.
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Other failures and possible causes

Failure
Oscillation of the pressure
Pump does not stop
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Maintenance and Notes

The HYDROVAR-Watercooled does not require any special maintenance!
For further information, please contact your distributor!
Over current /
6
Short circuit
Output current to te motor
is too high due to too high
nominal power of the
motor or short circuit of 2
phases of the motor or the
motor cable.
Overload
Output current is too high
Over voltage
6
Supply voltage is too high
or spikes on the supply
side.
Possible cause
Wrong pre-charge pressure in the
pressure tank
Wrong parameter setting
Dirty or blocked sensor
Wrong pre-charge pressure in the
pressure tank
Check valve is leaky or mechanically
blocked
Wrong parameter setting
Air in the suction pipe or in the pump
Flexible or too long suction line
Check the power consumption of the
motor and the working point of the pump
if they do not exceed the max. output
power of the Hydrovar-Watercooled
nominal power -
Reduce the flow rate.
Check the connection to the motor.
Pump is blocked or tight due to solid
parts inside the pump
Check the supply voltage level and all
connections -
If there are spikes on the supply line,
use special filters on the input side
Solution
Adjust pre-charge pressure
according to the required pressure
or the start pressure when active
Optimize control parameters
(contact customer service)
Clean the internal sensor piping
and connection
(contact customer service)
Adjust pre-charge pressure
according to the required pressure
or the start pressure when active
Clean or change the check valve
Increase the control window setting
(contact customer service)
Check the suction pipe, and
ventilate the whole system
Larger pressure tank necessary
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