Xylem 19 001 200 R2 SILENT STORM VFD Pumping System User Manual

Page 31

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(located at wire terminal strip). If the power is good,
replace the fan.

There is no water flow through heat exchanger. Make
sure both ball valves are open.

Water is leaking at the heat exchanger. Repair or replace
the coil.

Fault code 2 – DC overvolt (intermediate circuit
DC voltage is excessive).

To be performed by a qualified person only.
Check the input voltage (AC) to the drive. If high, contact
the power company.

Fault code 6 – DC undervolt (intermediate circuit
DC voltage is insufficient).

To be performed by a qualified person only.
Check the input voltage (AC) to the drive. If low, contact
the power company.

Fault code 7 – AI1 loss (analog 1 input value is
less than minimum value).

This can be a nuisance fault. Set parameter 3001 = 0 not
sel.

Fault code 9 – motor overtemp (motor too hot,
estimated value).

This can be a nuisance fault. Set parameter 3006 =
1050, and 3007 = 115.

Fault code 22 – supply phase (ripple voltage in
the DC link is too high).

To be performed by a qualified person only.
Check the input fuses to the VFD. Review the phase
failure section above.

MOTOR WON’T START

Cause

Cure

 

Individual pump switch light is flashing.

To be performed by a qualified person only.
The overload for that motor is tripped. Reset, adjust, or
replace as required.

Does the station have a high pump temperature option?
Check if the water temperature is greater than 120°F. If it
is, the pump is cavitating. If less than 120°F, the probe or
relay is bad.

To be performed by a qualified person only.
Does the station have the individual pump phase fault
option? See if the phase or voltage to motor is good.
Check the motor fuses. Replace that pump's phase
monitor as required.

Motor won’t start, but the individual pump switch
light is off.

If in VFD mode, will motor run XL? If yes, refer to the VFD
troubleshooting section. If no, proceed to next step.

To be performed by a qualified person only.
Check the input power to the starter. Ensure correct power
on all phases.

To be performed by a qualified person only.
Verify power on all lines to motor.

 

To be performed by a qualified person only.
Make sure motor terminal connections are not loose or
broken.

Motor won’t start, but the individual pump switch
light is green.

To be performed by a qualified person only.
Is pump jammed? Disconnect motor from pump, and try to
run motor.

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