Bosch Condens 8300i W - Following Inspection;Maintenance; Troubleshooting; Operating and Fault Displays; 10.1.1 General Information

Troubleshooting
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Condens 8300i W – 6721841531 (2022/10)
Variant with screws
▶ In service menu 6t-5, set 1 DHW and check the motor.
▶ In service menu 6t-5, set 2 Middle position.
▶Unplug the plug.
▶ Remove the screws.
▶ Pull on the motor gently and lift it up.
▶ Remove the motor.
Fig. 69 Detaching the motor from the 3-way valve (variant with screws)
When suspending the motor, do not push against the ball head, as it will
be hard to pull it out again.
▶ Lower the new motor from above and suspend it from the ball head.
▶ Push the motor in and fasten it in place using 2 screws.
▶Connect the plug.
Fig. 70 Installing the motor in the 3-way valve (variant with screws)
9.21 Following inspection/maintenance
▶ Re-tighten all the threaded connections that have been released.
▶ Restart the device ( page 24).
▶ Check tightness of all joints.
▶ Check the gas/air ratio.
▶Fit the casing.
10 Troubleshooting
10.1 Operating and fault displays
10.1.1 General information
The Fault code specifies the cause of the fault.
The Fault category specifies the impact of a fault on the device
operation.
Fault category O (operating code)
Operating codes specifiy an operating condition in normal mode.
Fault category B (blocking faults)
Blocking faults result in the heating system being shut down temporarily.
The heating system restarts automatically as soon as the blocking fault is
removed.
Fault category V (locking faults)
Locking faults result in the heating system being shut down, and the
system can only be restarted after a reset.
The fault code of a locking fault flashes together with the H on the
display.
▶ Check if a serious fault is present.
▶ Switch the device off and back on again.
-or-
▶ Press the keys  and  at the same time until the symbols H and
! disappear.
The device resumes operation. The flowtemperature appears on the
display.
If a fault persists after a reset:
▶ Remedy the cause of the fault according to the details in the table
further down.
Fault category W (service displays)
Service displays indicate that a maintenance or repair has to be carried
out. The device is still in operation. If the service display has been caused
by a defect, under certain circumstances, it may continue running with
restricted functions.
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0010031702-001
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