Xylem GOULDS 2GFK2412H, Инструкция по установке, эксплуатации и обслуживанию

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Cause Remedy
The installation is not
receiving voltage.
Check that:
• The main power switch is on.
• There is control voltage to the start equip-
ment.
• The fuses are intact.
• There is voltage in all phases of the supply
line.
• All fuses have power and that they are se-
curely fastened to the fuse holders.
• The overload protection is not tripped.
• The motor cable is not damaged.
The impeller is stuck. Clean:
• The impeller
• The sump in order to prevent the impeller
from clogging again.
If the problem persists, then contact a sales or authorized service rep-
resentative.
Always state the serial number of the product, see
Product Description
on page 5.
7.3 The pump does not stop when a level
sensor is used
DANGER: Crush Hazard
Moving parts can entangle or crush. Always disconnect and
lock out power before servicing to prevent unexpected start-
up. Failure to do so could result in death or serious injury.
Cause Remedy
The pump is unable to
empty the sump to the
stop level.
Check that:
• There are no leaks from the piping and/or
discharge connection.
• The impeller is not clogged.
• The non-return valve(s) are functioning
properly.
• The pump has adequate capacity. For in-
formation:
Contact a sales or authorized service rep-
resentative.
There is a malfunction
in the level-sensing
equipment.
• Clean the level regulators.
• Check the functioning of the level regula-
tors.
• Check the contactor and the control circuit.
• Replace all defective items.
The stop level is set
too low.
Raise the stop level.
If the problem persists, then contact a sales or authorized service rep-
resentative.
Always state the serial number of the product, see
Product Description
on page 5.
7.4 The pump starts-stops-starts in rapid
sequence
Cause Remedy
The pump starts due
to back-flow which fills
the sump to the start
level again.
Check that:
• The distance between the start and stop
levels is sufficient.
• The non-return valve(s) work(s) properly.
• The length of the discharge pipe between
the pump and the first non-return valve is
sufficiently short.
The self-holding func-
tion of the contactor
malfunctions.
Check:
• The contactor connections.
• The voltage in the control circuit in relation
to the rated voltages on the coil.
• The functioning of the stop-level regulator.
• Whether the voltage drop in the line at the
starting surge causes the contactor's self-
holding malfunction.
If the problem persists, then contact a sales or authorized service rep-
resentative.
Always state the serial number of the product, see
Product Description
on page 5.
7.5 The pump runs but the motor protection
trips
DANGER: Crush Hazard
Moving parts can entangle or crush. Always disconnect and
lock out power before servicing to prevent unexpected start-
up. Failure to do so could result in death or serious injury.
NOTICE:
Do NOT override the motor protection repeatedly if it has tripped. Do-
ing so may result in equipment damage.
Cause Remedy
The motor protection
is set too low.
Set the motor protection according to the da-
ta plate and if applicable the cable chart.
The impeller is difficult
to rotate by hand.
• Clean the impeller.
• Clean out the sump.
• Check that the impeller is properly trim-
med.
The drive unit is not
receiving full voltage
on all three phases.
• Check the fuses. Replace fuses that have
tripped.
• If the fuses are intact, then notify a certified
electrician.
The phase currents
vary, or they are too
high.
Contact a sales or authorized service repre-
sentative.
The insulation be-
tween the phases and
ground in the stator is
defective.
1. Use an insulation tester. With a 1000 V DC
megger, check that the insulation between
the phases and between any phase and
ground is > 5 megaohms.
2. If the insulation is less, then do the follow-
ing:
Contact a sales or authorized service rep-
resentative.
7 Troubleshooting
18 1310 Installation, Operation, and Maintenance Manual