75
Fault during commissioning (fault A3)
During commissioning, the control unit checks for cor-
rect placement of the flue gas temperature sensor. If
commissioning is terminated and fault message A3 is
displayed:
1.
Check whether the flue gas temperature sensor is
correctly inserted. See previous diagram.
2.
If necessary, correct the position of the flue gas
temperature sensor or replace faulty flue gas tem-
perature sensor.
3.
Press reset button
R
and repeat commissioning.
The check is repeated until it is completed suc-
cessfully.
Checking the temperature limiter
If the burner control unit cannot be reset after a fault
shutdown although the boiler water temperature is
below approx. 90 °C, check the following:
A
Fig. 41
1.
Disconnect the leads from temperature limiter
A
.
2.
Check the continuity of the temperature limiter with
a multimeter.
3.
Remove faulty temperature limiter.
4.
Install a new temperature limiter.
5.
After commissioning, press reset button
R
on the
control unit.
Troubleshooting
Maintenance
(cont.)
5686 293 GB
Diagnosis
Содержание J3HA
Страница 10: ...10 2x 1 2 4 3 Fig 2 Installation sequence Mounting the boiler and making connections 5686 293 GB Installation ...
Страница 21: ...21 2 3 2x 1 Fig 14 Installation sequence Fitting the front panel 5686 293 GB Installation ...
Страница 78: ...78 Troubleshooting Maintenance cont 5686 293 GB Diagnosis ...
Страница 90: ...90 0004 0006 0005 0003 0001 0002 Fig 51 Parts lists Miscellaneous assembly 5686 293 GB Components ...
Страница 114: ...114 5686 293 GB ...
Страница 115: ...115 5686 293 GB ...