61
12
Fig. 40
Note
The flow switch monitors the minimum flow rate
required for operating the heat pump.
1.
Check the tip of the sensor regularly for possible
deposits.
2.
Clean the tip of the sensor with a cloth, if required.
Remove stubborn deposits (such as limescale)
with commercially available vinegar-based clean-
ers.
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 green.
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 at the heat pump control unit 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 is displayed once the short cir-
cuit has been remedied.
No LED illuminates.
Operating voltage < 19 VDC or power supply failure.
Commissioning, inspection, maintenance
Checking the electronic flow switch, type IFM
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Summary of Contents for Vitocal 300-G Pro BW 302.D090
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