41
12
Fig.26
The electronic flow switch monitors the minimum flow
rate required for operating the heat pump.
1.
Check the tip of the sensor regularly for deposits.
2.
If required, clean the tip of the sensor with a cloth.
Remove stubborn deposits (such as limescale) with
commercially available vinegar-based cleaners.
3.
Switch on the power supply.
LEDs "0" to "9" illuminate green in sequence and
then extinguish again.
The operating display then follows.
Flow switch operating displays
LED
Meaning
Several LEDs illuminate green.
Indication between no (no LED illuminates) and maximum
flow rate (all LEDs illuminate green).
The higher the flow rate, the more LEDs illuminate.
LED "9" flashes green.
Flow rate higher than nominal flow rate
If required, carry out an operating display adjustment (high
flow balancing, see below), for example if circulation pumps
had to be sized for higher flow rates.
LED "0" flashes green.
Flow rate below minimum flow rate
Note
A fault is triggered if the flow rate undershoots the switching
point (message
"D6 Flow switch"
).
LED for switching point illuminates orange.
Switching output closed; heat pump in standby mode
LED for switching point illuminates red.
Switching output open; heat pump in a fault state (compres-
sor shuts down, message
"D6 Flow switch"
, see
Vitotronic 200, type WO1C service instructions).
All LEDs illuminate alternately red and green.
Short circuit at the switching output
Note
The current operating mode will be displayed once the short
circuit has been remedied.
No LED illuminates.
Operating voltage < 85 V~ or power supply failure.
Installation sequence
Checking the electronic flow switch, type IFM
5549 991 GB
Installation
Summary of Contents for 301.BS090
Page 99: ...99 5549 991 GB...
