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© Copyright 2021 Zoeller

®

 Co. All rights reserved.

FIGURE 3

MAIL TO:

  P.O. BOX 16347 • Louisville, KY  40256-0347 USA

SHIP TO:

  3649 Cane Run Road • Louisville, KY  40211-1961 USA

+1 (502) 778-2731 • 1-800-928-7867 • FAX +1 (502) 774-3624

visit our web site:

zoellerpumps.com

MODEL NO.

SUMP

SEWAGE

X

10-4660

X

53-0084

X

98-0069

X

267-0121

X

SWITCH TYPE

POWER WIRE COLOR

SUMP

RED

SEWAGE

BLUE

DISCHARGE PIPE

CORDS SECURED TO

LEVEL

PUMP "OFF"

LEVEL

PUMP "ON"

ZOELLER UNICHECK

TO POWER SUPPLY

REDUNDANT "ON" 

LEVEL 

MOUNT FLOATLESS SWITCH 

WITH (2) TIE STRAPS THAT 

ARE PROVIDED WITH SWITCH.

PUMP PLUG

SWITCH PLUG

AUTOMATIC

OPERATION

MANUAL

OPERATION

L1

L2

SWITCH

DISCONNECT

WATERTIGHT

JUNCTION BOX

WHITE

BLACK

SEE CHART

BLACK

WHITE

WHITE

GREEN

BLACK

PUMP

FLOATLESS 

SWITCH

SK3180

SYMPTOM

POSSIBLE ROOT CAUSE

POTENTIAL CORRECTIVE ACTION

A. Pump will not start or run.

Switch cord improperly plugged into receptacle

Properly insert plug into receptacle

Pump cord improperly plugged into pump switch plug

Properly insert pump cord into pump switch piggyback 

plug 

Blown panel fuse or breaker

Replace with proper sized fuse or reset breaker

GFCI receptacle tripped

Reset GFCI receptacle

Low voltage

If voltage under 108 volts, contact qualified electrician

Main power outage

The pump switch will not work without power

Contamination built-up on pump switch exterior

See " Switch Maintenance" for proper cleaning 

instructions

Improper mounting/ loose 

See "Installation Instructions"

Damaged or defective pump switch

Contact Zoeller Product Support

B. Pump starts and stops too 

often.

Significant in-flow of water

This is normal. Check pump specification to confirm 

adequate pumping capacity

Pump switch mounted facing inlet pipe

Reinstall switch facing away from inlet pipe

Defective check valve

Replace the check valve

Excessive temperature

Let system cool down for 5 minutes

Improper mounting/ loose

See "Installation Instructions"

Damaged or defective pump switch

Contact Zoeller Product Support

C.

Pump will not shut off when 

water is not present at the 

lower limit.

Contamination built-up on pump switch exterior

See "Switch Maintenance" for proper cleaning 

instructions

Improper mounting/ loose

See "Installation Instructions"

Foreign conductive object near sensor

Remove foreign object

Damaged or defective pump switch

Contact Zoeller Product Support

TROUBLESHOOTING FOR FLOATLESS WATER LEVEL SWITCH

OPERATION:

1.       Allow the sump to fill until the water level reaches the 

ON

 point.

2.       Sump pump will turn on within 3 seconds of the water level reaching the 

ON

 point. 

3.      The pump will remain on until the water level drops below the 

OFF

 point. The pump may remain on up to 1 second after passing the 

OFF

 point.

4.       This will set the standard run time for the switch.

5. 

If the pump runs for longer than the standard run time, the standard run time will be incremented by 5 seconds on future cycles. This 

will repeat until the run time is long enough for the water to reach the off level or the run time is increased to two minutes.

6. 

If water is over the "ON" level the pump will run continuously until the water is below the "ON" level, at which point the switch will revert 

to standard operation.

MODEL NO.

SUMP

SEWAGE

X

10-4660

X

53-0084

X

98-0069

X

267-0121

X

SWITCH TYPE

POWER WIRE COLOR

SUMP

RED

SEWAGE

BLUE

DISCHARGE PIPE

CORDS SECURED TO

LEVEL

PUMP "OFF"

LEVEL

PUMP "ON"

ZOELLER UNICHECK

TO POWER SUPPLY

REDUNDANT "ON" 

LEVEL 

MOUNT FLOATLESS SWITCH 
WITH (2) TIE STRAPS THAT 

ARE PROVIDED WITH SWITCH.

PUMP PLUG

SWITCH PLUG

AUTOMATIC

OPERATION

MANUAL

OPERATION

L1

L2

SWITCH

DISCONNECT

WATERTIGHT

JUNCTION BOX

WHITE

BLACK

SEE CHART

BLACK

WHITE

WHITE

GREEN

BLACK

PUMP

FLOATLESS 

SWITCH

FIGURE 4

For direct wire installations only

FLOATLESS SWITCH MAINTENANCE

Warning:

 Unplug Floatless switch and pump from all electrical power 

BEFORE doing any service or maintenance. 

• 

Inspect area around pump switch, wipe free of buildup and clear all 

foreign objects.

• 

Plug pump switch and pump back into receptacle after inspection. 

Check for proper operation.

• 

We recommend that you do this maintenance at least once a year. 

However, harsh environmental conditions may dictate the frequency 

of your actual maintenance schedule.

• 

Floatless pump switch contains NO serviceable parts.

Do not disassemble pump switch. Doing so can result 

in death or electrical shock and voided warranty.

• 

If pump switch stops working, refer to 

troubleshooting instructions provided.

• 

If part is under warranty, contact factory or sale 

location.

• 

If part is not under warranty, the lawful disposal of 

unit is necessary.

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