Aquascape Pro 7500 Handbuch für Installation und Wartung - Seite 7

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1. Electrical Connections

Problem

Pump cycles too frequently

or runs periodically when

fixtures are not in use.

Pump Shuts off and turns on

independent of switch.

(trips thermal overload

protector).

CAUTION! Pump may start

unexpectedly. Disconnect

power supply.

Pump operates noisily or

vibrates excessively.

6) Corrections

1. Check all electrical connections for security. Have electrician measure current in motor

leads, if current is within ±20% of locked rotor Amps, impeller is probably locked. If

current is 0, overload may be tripped. Remove power, allow pump to cool, then

recheck current.

2. Make sure water level is at or close to proper height on skimmer face plate. (see below)

3. Recheck all sizing calculations to determine proper pump size.

4. Check discharge line for restrictions, including ice if line passes through or into cold

areas.

5. Remove and examine check valve for proper installation and freedom of operation.

6. Open valve.

7. Check impeller for freedom of operation, security and condition. Clean impeller cavity

and inlet of any obstruction.

8. Remove pump or tilt pump to allow trapped air to escape from impeller chamber.

9. Check rotation. If power supply is three phase, reverse any two of three power supply

leads to insure proper impeller rotation.

10. Repair fixtures as required to eliminate leakage.

11. Check pump temperature limits & fluid temperature.

12. Replace portion of discharge pipe with flexible connector.

13. Check for leaks around basin inlet and outlets.

14. Check fittings and tighten if needed

Cause (Correction*)

• Check valve stuck closed or installed backwards. (5)

• Insufficient water level. (2)

• Incorrect voltage (1)

• Excessive inflow or pump not properly sized

for application. (3)

• Impeller jammed or loose on shaft, worn or

damaged, impeller cavity or inlet plugged. (7)

• Excessive water temperature (internal

protection only). (11)

• Debris in impeller cavity or broken impeller. (7)

• Fittings on pump or check valve not secured

properly (14)

*see step 6 below