Aqua Control SELECT Series 2 Gebrauchsanweisung - Seite 19

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2. Check line-to-line resistance. Verify the power is off before testing.

a. Power off control panel.

b. Remove the pump cable connections from the terminal blocks at the bottom of control panel.

c. Set the ohmmeter to lowest resistance range.

i. Check each pair of pump cable wires, excluding Ground. Readings should be 2 – 20 ohms.

1. Single Phase 3-wire: Black-Yellow < Red-Yellow < Black-Red.

2. Single Phase 2-wire: T1-T2.

3. Three Phase: T1-T2, T1-T3, T2-T3; all readings should be identical.

ii. Readings of zero indicate a "Short"; readings greater than 20 ohms indicate an "Open" or partially broken line. Either

of these readings indicate a problem.

d. If line-to-line readings indicated a problem, it is necessary to isolate the problem.

Any connection points, e.g. junction boxes, splices, connectors etc., provide a potential problem area.

Additionally, animal bites, cuts or scrapes could create a problem.

ii. Perform step# 2c at each connection point from the end of the cable at the control panel to the motor lead, until a good

reading is found. The problem will be in the previous connection tested. If the final test is at the motor lead, the problem

is with either the motor or the motor lead.

e. If line-to-line readings are good, continue.

3. Investigate Mechanical Problems

a. 70% of overload problems are mechanical e.g. worn or bad bearings, locked rotors, bent motor shafts, or broken shrouds.

An improperly pitched prop, missing shims or nozzle problems may cause overloads to trip.

b. When thrust bearings are worn, the motor shaft may be pulled 1/8" or more. When radial bearings are worn, the motor shaft

may be moved side to side slightly.

4. Nuisance Tripping

a. Nuisance tripping can be caused by temporary voltage irregularities e.g. brownouts, spikes.

b. Excessive heat, above 122ºF may cause overload tripping. A control panel in direct sunlight will heat up and temporarily

degrade thermal overloads protection. One possible solution is to remove the cover of the motor control box.

Another solution is to cover the control panel with an awning or face the panel North or West.

TROUBLESHOOTING

OVERLOAD TROUBLESHOOTING

Aqua Control, Inc. 60 Hz. Select Series 2 Instruction Manual