en
52
Installation
Indications,
functions and options
Messages
Commissioning
Operation and function
Display of flow rate / PWM feedback signal
l/h
Flow rate / PWM feedback signal
Display range: depending on the sensor type used and the PWM feedback signal
selected respectively
Indicates the current flow rate at the VFD flow rate sensor or of the bidirectional
pump and its error messages respectively.
The display range depends on the sensor type selected.
l/h2
(Arr 6 and 7 only)
Flow rate / PWM feedback signal
Display range: depending on the PWM feedback signal selected
Indicates the current flow rate of the bidirectional pump and its error messages
respectively.
For information on error messages see page 56.
Note
If both the PWM feedback signal and the VFD Grundfos Direct Sensor™
are registered, the flow rate of the pump will be displayed.
Display of current pump speed
n %, n1 %, n2 %
Current pump speed
Display range: 30 … 100 %
Indicates the current pump speed of the corresponding pump.
• n % : Current pump speed (1-pump system)
• n1 % : Current pump speed pump 1
• n2 % : Current pump speed pump 2
Display of heat quantity
kWh/MWh
Heat quantity in kWh / MWh
Display channel
Indicates the energy gained in heat quantity – only available if heat quantity meas-
urement (OHQM) is activated.
The heat quantity measurement can be carried out in 3 different ways (see page
62): with a fixed flow rate value, with a VFD Grundfos Direct Sensor™ or with
a PWM feedback signal. It is shown in kWh in the channel kWh and in MWh in the
channel MWh. The overall heat quantity results from the sum of both values.
The accumulated heat quantity can be set back to zero. As soon as one of the dis-
play channels of the heat quantity is selected, the symbol
Ⓢ
is displayed.
Î
In order to access the reset mode of the counter, press button 3 for approx. 2 s.
Ⓢ
starts flashing and the heat quantity value will be set back to zero.
Î
In order to finish the reset process, press button 3.
In order to interrupt the reset process, do not press any button for about 5 s. The
display returns to the display mode.
Display of thermal disinfection
CDIS
Countdown monitoring period
Display range: 0 … 30:0 … 24 (dd:hh)
If the thermal disinfection option (OTD) is activated and the monitoring period
is in progress, the remaining time is displayed as CDIS (in hours and minutes),
counting backwards.