Viessmann Vitocal 300 AWO-M-AC 301.A, Installation And Service Instructions Manual

Page: 122 / 152

122
Checking sensors
■ For sensor connections to the control-
ler and sensor PCB, see page 78.
■ For the position of the sensors in the
heat pump, see diagram on page 120.
Temperature sensors type Ni500
400
-40 -20 0
Resistance in
Temperature in °C
440
480
520
560
600
20 40 60
640
Capturing element: "Ni500"
■ Outside temperature sensor (F0)
■ Flow temperature sensor heating cir-
cuit M2/HC2 (F12)
■ Flow temperature sensor, cooling
(heating circuit A1/HC1 or separate
cooling circuit) (F14)
■ Room temperature sensor, separate
cooling circuit (F16)
■ Room temperature sensors (Vitotrol)
Temperature sensors type Pt500
460
20
540
100
Resistance in
Temperature in °C
60 140 180
620
700
780
860
-20
Capturing element "Pt500"
■ System flow temperature sensor (F13)
■ Buffer temperature sensor, top (F4)
■ Cylinder temperature sensor, top/bot-
tom (F6/F7)
■ Temperature sensor, external heat
source (F20)
■ Flow/return temperature sensor, sec-
ondary circuit (F8/F9)
■ Boiler water temperature sensor,
external heat source (F20)
■ Air intake/discharge temperature sen-
sors (F2/F3)
■ Evaporator temperature sensor (F17)
Troubleshooting
Repair
(cont.)
5692 875 GB