Pentair Pentek Series Electronic Manual page 92

SECTION 13: Troubleshooting
Pump And Motor Problem Analysis (Continued)
Problem Possible Cause
Pu mp runs all the Pump wear.
time (continued)
Electric shock. Gr ounded wiring
Moisture.
Am meter reads high Th ree phase
on two leads, zero
on the 3rd.
Ov erload trip – Bi nding or
ammeter reads high
on all leads.
Po wer supply
Check And Restore
1. Check amperage - generally lower unless severe bearing damage has
occurred.
2. Verification may require removal of pump for service and visual
inspection.
1. PROCEED WITH CAUTION!
or motor.
2. Remove rings and other jewelry from hands before working with live
power circuits.
3. Wear insulated boots and gloves.
4. Disconnect the power, check with ohmmeter.
5. Progressively check wire at each splice point (or obvious damage
point).
6. When ground disappears, the fault is behind the point of discovery.
7. Check motor leads to motor shell with cable splice removed to
determine if ground fault is in motor or supply cable.
Protect motor, motor starter and control devices from condensation or
direct water spray.
1. One power lead is not live or online.
motor "single
2. Check with local utility company to see if having problems.
phasing".
3. Check local power installation for transformer problems.
4. Will not be able to observe this condition very long. Very destructive to
motor windings. Motor stator will soon be destroyed if single phasing
protection is not installed.
5. This problem usually requires a replacement motor.
6. Determine source, install or replace protective gear.
1. High volume of sand or other abrasives in well. Check by observing
dragging. water output.
2. Severe damage to motor thrust bearing due to cavitation or abrasives.
Usually very noisy.
3. Damage to motor control system.
1. Check with voltmeter while pump is running for ±10% voltage
problems. variance.
2. Extreme grounding of motor or supply cable. Check with ohmmeter
or megohmmeter.
3. Poor wiring connections. Check splice, and terminal screws for
looseness. Watch for discolored cable.
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