en – Original Instructions
ecocirc PRO – Installation, Operation and Maintenance Manual 25
5.6.5 LED light
The standard pump models with potentiometer knob, have a green operation light integrated
in the knob. It indicates the main operating modes and the error codes as well, if any is present.
This function may be switched off in some special OEM versions.
Mode indications:
Normal operation, the pump is running
Air purge sequence is active Blinking 200 ms on – 200 ms off – 200 ms on…
Standby mode Blinking 50 ms on – 1.5 s off – 50 ms on…
For error codes see section Error signals on page 28.
3
5.6.6 Motor protection from overtemperature
In order to protect the electronics inside the pumps from temperatures that are dangerously
high, the pump is equipped with an internal temperature sensor and a self-protecting algorithm.
The temperature is measured directly at the electronics. When the temperature of the
electronics is between 105 °C and 115 °C (221–239 °F), the pump power is continuously lowered
to minimum power and thus the flow of water is also decreasing. If despite the power regulation
the temperature still rises and reaches around 125 °C (257 °F), the pump stops completely. Once
the electronics have cooled down again to around 115 °C (239 °F) the pump automatically
restarts.
5.6.7 Dry run protection
This function is available only for some fix speed models. This algorithm protects the unit from
dry running during normal operation.
The pump monitors the input power level and if it drops below a preset value for a specified
time interval, the pump starts a sequence with 9 cycles of 30 s on and 60 s off, then a 10-minute
pause and so on, until the expected power level restored and the pump can continue the normal
operation.
5.6.8 Power Down Reset (PDR)
This function is available only for some fix speed models. This algorithm protects the unit from
dry running during normal operation.
This algorithm is a special version of the dry run protection.
If the expected power level cannot be restored in 3x9 cycles, described in the section
5.6.7,
the pump stops and restarts only after the termination of the power supply.
5.6.9 Temperature sensor error mode
This function is available only for some temperature controlled models. It is activated if the signal
from the water temperature sensor is interrupted. In this case the pump runs in a kind of
emergency mode with repeating the operation cycle of 1 minute running - 1 minute standby
mode. In this situation the pump will not react on the potentiometer knob settings anymore, the
operation can only be stopped by disconnecting the power supply.
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