Cause
Remedy
The density of the pumped fluid is too
high.
Make sure that the maximum density is 1100 kg/m
3
(9.2 lb/US gal)
• Change the impeller, or
• Change to a more suitable pump
• Contact a sales or authorized service representative.
The ambient temperature exceeds the
maximum ambient temperature.
The pump must not be used for such an application.
There is a malfunction in the overload
protection.
Replace the overload protection.
If the problem persists, then contact a sales or authorized service representative.
Always state the serial number of the product, see
5.6 The pump delivers too little or no water
DANGER: Crush Hazard
Moving parts can entangle or crush. Always disconnect and lock out power before
servicing to prevent unexpected startup. Failure to do so could result in death or serious
injury.
NOTICE:
Do NOT override the motor protection repeatedly if it has tripped. Doing so may result in
equipment damage.
Cause
Remedy
The impeller rotates in the wrong
direction.
• If it is a 3-phase pump, then transpose two phase leads.
• If it is a 1-phase pump, then do the following:
Contact a sales or authorized service representative.
One or more of the valves are set in
the wrong positions.
• Reset the valves that are set in the wrong position.
• Replace the valves, if necessary.
• Check that all valves are correctly installed according to media flow.
• Check that all valves open correctly.
The impeller is difficult to rotate by
hand.
• Clean the impeller.
• Clean out the sump.
• Check that the impeller is properly trimmed.
The pipes are obstructed.
To ensure a free flow, clean out the pipes.
The pipes and joints leak.
Find the leaks and seal them.
There are signs of wear on the
impeller, pump, and casing.
Replace the worn parts.
The liquid level is too low.
• Check that the level sensor is set correctly.
• Depending on the installation type, add a means for priming the pump,
such as a foot valve.
If the problem persists, then contact a sales or authorized service representative.
Always state the serial number of the product, see
5 Troubleshooting
64
2620.172/.281 Service and Repair Instructions
Summary of Contents for Flygt 2620.172
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