Flow Sensor Hc2 - Viessmann VITOTRONIC 200 Service Instructions Manual

Message overview
(cont.)

40 Flow sensor HC2

Heating circuit mixer M2/HC2 is closed.
Cause
Short circuit, flow temperature sensor, heating circuit
with mixer M2/HC2
41 Flow sensor HC3
Mixer heating circuit M3/HC3 is closed.
Cause
Short circuit, flow temperature sensor, heating circuit
with mixer M3/HC3
43 Flow sensor system
■ Flow temperature in heating circuit without mixer
A1/HC1 is regulated via the return temperature sen-
sor of the heat pump, no frost protection for this
heating circuit.
Control of flow temperature for external heat source:
■
Temperature sensor for the buffer cylinder is used as
a substitute.
Cause
Short circuit, system flow temperature sensor (down-
stream of buffer cylinder)
44 Flow sensor cooling
If "Enable flow temperature sensor cooling circuit
7109" is set to "0", cooling operation is possible, oth-
erwise no cooling.
Cause
Short circuit, flow temperature sensor, cooling circuit
48 Flow sensor HC2
Heating circuit mixer M2/HC2 is closed.
Cause
Lead break, flow temperature sensor, heating circuit
with mixer M2/HC2
Measure
Check resistance value (NTC 10 k
"Controller and sensor PCB".
Measure
Check sensor: See mixer extension kit installation in-
structions.
Measure
Check resistance value (NTC 10 k
"Controller and sensor PCB".
Measure
Check resistance value (NTC 10 k
"Controller and sensor PCB".
Measure
Check resistance value (NTC 10 k
"Controller and sensor PCB".
Troubleshooting
) at plug F12: See
Ω
) at plug F13: See
Ω
) at plug F14: See
Ω
) at plug F12: See
Ω
83