Installation
48 300855170_002_C8 - 08/2021 - © Leybold
Relay status
Input data / status Output data Operating mode
Start/ Pump Normal Error is Motor Relay Relay LED LED
stop rotating frequency present drive NORMAL ERROR STATUS ERROR
signal ≥ 90% of OPERATION (green) (red)
setpoint
frequency
Stop no no no off passive passive off off Pump not operating
Stop yes no no off passive passive flashes off Pump is decelerating
Stop yes yes no off passive passive flashes off Just after stop; pump was in the normal
operating mode before that
Start no no no on passive passive off off Just after start
Start yes no no on passive passive flashes off Pump is accelerating
Start yes yes no on active passive green off Pump is in the normal operating mode
Stop no no yes off passive active off red Error is present; pump is at standstill
Stop yes no yes off passive active flashes red Error is present; pump is decelerating
Stop yes yes yes off passive active flashes red Error has just occurred
Start no no yes off passive active off red Error is present; pump is at standstill
Start yes no yes off passive active flashes red Error is present; pump is decelerating
Start yes yes yes off passive active flashes red Error has just occurred
Other modes are not possible;
they indicate a failure affecting
the frequency converter.
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