Buderus Logamax GB062-24 KDE H V2, Руководство по обслуживанию

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4
Fault finding
Logamax Plus GB062 26
4Y
Flow temperature sensor (CH-NTC) faulty.
Step Remedy
1. Check the flow temperature sensor for
damages.
B Switch off the boiler.4C
B
Remove the Socket of NTC.
B
Measure the electrical resistance of
CH-NTC (in
Ω
) (see NTC tables).
Is the resistance value correct ?
yes: --> 2.
no: B Change the Sensor.
B
Switch on the boiler.
4Y on display ?
-->2.
2. Check the NTC cables for damages.
B Switch off the boiler.
B
In case of CH-NTC is changed :
- Remove the NTC socket.
- Measure the NTC resistance.
- Connect the socket again.
B Remove the big socket (20 Pole) on
PCB.
B Measure the NTC resistance (
Ω
) on
big socket (PCB side).
Are measured resistance values on
NTC and socket side different ?
yes:
B
Change the cable haarness.
B Switch on the boiler.
4Y on display ?
-->3.
no: --> 3.
3. Electronic board (PCB) is defect. B Switch off the boiler.
B
Cut the main voltage supply.
B
Change the electronic board (PCB).
B Switch on the main voltage supply.
B
Switch on the boiler.
B
END