Bosch Condens 7000 WP - Page 42

Troubleshooting
Condens 7000 WP – 6721842519 (2022/03)
42
1022 W Cylinder temp. sensor faulty or contact
problems
1. Connect the plug to the temperature sensor correctly.
2. Connect the plug to the control device correctly.
3. Check the temperature sensor, replace if necessary.
4. Check temperature sensor connecting lead, replace if necessary.
1023 Maximum run time including standby time
reached
1. Carry out maintenance.
2. Reset service display.
1025 W Return temp. sensor is faulty 1. Connect the plug to the return temperature sensor correctly.
2. Replace return temperature sensor.
3. Replace connecting lead to return temperature sensor.
4. Replace control device.
1037 W Outside temp. sensor faulty - heating back-
up operation active
1. If an outside temperature sensor is not desired. Select the room temperature-
dependent configuration in the control device.
2. If there is no continuity, rectify the fault.
3. Clean corroded terminals in the outside sensor housing.
4. If values do not match, replace the sensor.
5. If the sensor values matched, but the voltage values do not match, replace the control
unit.
1065 W System pressure sensor faulty or not
connected
1. Connect the plug to the pressure sensor correctly.
2. Check pressure sensor connecting lead, replace if necessary.
3. Check the pressure sensor, replace if necessary.
1068 W Outside temp. sensor or lambda probe
faulty.
1. Connect the plug to the temperature sensor correctly.
2. Connect the plug to the control device correctly.
3. Attach the temperature sensor correctly.
4. Check the temperature sensor, replace if necessary.
5. Check temperature sensor connecting lead, replace if necessary.
1070 Maintenance is due on <dd.mm.yyyy>
please call your service engineer
–
1071 Maintenance is now due please call your
service engineer
–
1072 Maintenance is overdue please call your
service engineer
–
1074 No signal from flow temperature sensor –
1075 W Heat exchanger temp sensor short circuit 1. Connect the plug to the temperature sensor correctly.
2. Check the temperature sensor, replace if necessary.
3. Check temperature sensor connecting lead, replace if necessary.
1076 W Heat exchanger temp sensor disconnected 1. Connect the plug to the temperature sensor correctly.
2. Check the temperature sensor, replace if necessary.
3. Check temperature sensor connecting lead, replace if necessary.
2085 V Internal fault 1. Unlock.
2. Disconnect power from the system for 30 seconds.
3. Replace the burner control unit.
2908 V System fault boiler electronics / basic
controller
If the fault persists following a reset, the burner control unit is faulty and must be replaced.
2910 V Fault in flue system 1. Install the flue system.
2. Remove any deposits from the flue system.
2914 -
2916
V Boiler electr. system fault If the fault persists following a reset, the control device is faulty and must be replaced.
2920 V Fault in flame monitoring Check control device, replace if necessary.
2923-
2926
V Boiler electr. system fault 1. Check air/gas ratio control valve cabling.
2. Check air/gas ratio control valve.
If the fault persists following a reset, the control device or the air/gas ratio control valve is
faulty and must be replaced.
Fault code Fault category
Fault text on the display, description Remedy