Pentair Pentek Series User Manual

89
Troubleshooting
13.1 Pump And Motor Problem Analysis
Problem Possible Cause Check And Restore
Pump Won’t Start. No voltage (check
with voltmeter).
Typically will be no
startupnoise.
1. Main power supply off.
2. Blown fuse or tripped circuit breaker.
3. Wiring damage, loose connection.
4. Burnt contactor points.
Locked pump. 1. Check for sand in system.
2. Crooked well (submersible)
Overloads Trip. Low or high voltage. 1. Check with voltmeter. (±10% of nameplate voltage). Request
power company correct problem.
2. Determine if wire size is correct for voltage and amperage.
Hi gh ambient
temperature or direct
sunlight.
1. Improve cooling for motor and controls.
2. Use ambient compensated overloads.
In correct pump sizing –
mismatched motor.
1. Check pump (gpm) make sure near B.E.P. - “Best Efficiency
Point”.
2. Recheck pump and motor model numbers prior to installation.
Keep a written record.
High cycling rate. 1. Pressure control equipment malfunction.
2. Hole in piping system.
3. Pressure/storage tank failure.
Damaged motor control. Check components per troubleshooting.
Fu ses Blow or
Breaker Trips.
Short or Ground. 1. Fuses give superior protection and should be used in preference
to circuit breakers when possible.
2. Inspect wiring for visible signs of heat damage (discoloration,
damage to insulation).
3. Disconnect power and check with ohmmeter or megohmmeter
toground.
Improper sizing. Consult manufacturer’s information / sizing chart for proper size
and replace as required.
Lo w or No Water
Production.
No rotation. 1. Motor not turning (see “Pump won’t start” above.
2. Broken shaft coupling. Ammeter will show “low” amps.
Restriction in piping. 1. Check valve sticking.
2. Check valve installed backward.
3. Broken check valve poppet or flapper lodged in piping system
downstream.
Plugged inlet. 1. Intake screen encrusted with minerals.
2. Insufficient clearance between pump and well casing for high
capacity pump. Calculate intake velocity and limit to less than
5feet per second.
SECTION 13: Troubleshooting

Pentair Pentek Series Specifications

General

Brand	Pentair
Model	Pentek Series
Category	Engine
Language	English