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4.7.4 Sewage Pump with piggyback oat switch mode
Function switch setting
ON
Fig 25: Sewage Pump Mode Setting and Display
Operation:
Ÿ Main pump and standby pump automatically alternate due to water
level sensor position
When water level raises and float switch A/B rise to up level, controller will run pump
A. Water level falls and float switch A/B decline to down level, pump A stops. When
the water level rises again and float switch A/B rises to up level, controller will
alternate to run pump B.
Ÿ Automatic changeover due to pump fault.
When pump A breaks down during operation, controller will run pump B.
Ÿ Pump parallel operation
When pump A is running, the water level raises and float switch C rises to up level,
controller will run pump B.
Fig 26: Sewage Pump with Piggy Float Switch Connection
1 2 3
LCD display
4 17
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