Disturbances, possible causes and measures
GP - Series | Version 1.03
17
The motor is operating
but the pump does not
pump liquid.
1. The pump housing is not filled
with the water.
2. Infiltration of air into the suction
pipe.
3. Water level is too low.
4. Outdoor temparatur is too low
(water froozen)
5. The water pipes are defect.
1. Fill the pump housing with the water.
2. Verify and ensure that the suction pipe and all
connections are tight.The inlet of the suction pipe
including the non-return valve is immersed in the
pumped liquid. The non-return valve with filter is
closes tightly and not blocked. There are no si
-
phons, bends, counter slopes or constrictions
along the suction lines.
3. Change of the installation, so that the suction
head and/or delivery head do not exceed the
maximum value.
4. Increase the temperature, start the pump as
soon as the ice has thawed completely.
5. Check water pipes and replace if necessary.
Suction decreases.
Blockages in the suction nozzle, in
-
take manifold, suction hose or filter.
1. Remove blockages.
2. Clean or change the filter.
3. Insert the filter cover correctly.
4. Check correct installation position of the filter.
Pump is not running di
-
rection and very loud
1. Inadequate water supply
2. Defective suction line
3. Seal defective
4. Suction line clogged
5. Suction height and / or head
height too high.
1. Check water supply
2. Check suction line, replace if necessary
3. Check seal, replace if necessary
4. Clean suction line
5. Modification of the installation, so that the suc
-
tion height and / or delivery height exceed the
max. Do not exceed the value.
The pump stops after a
short period of operation
1. The electrical connection does
not match the information given
on the nameplate.
2. Solid block the pump or suction
line.
3. Dry running of the pump.
4. Temperature of liquid or environ
-
ment is too high.
1. Check the voltage on the cables of the connec
-
tion cable with a GS-compliant device
2. Remove blockages.
3. Eliminate causes of dry running.
4. Make sure that the temperature of the pumped
fluid and the environment does not exceed the
maximum permitted values.
Malfunction
Possible cause
Measurement
