FAULT FINDING AND DIAGNOSIS
Greenstar Ri Compact 6 720 646 610 (2013/12)50
7.1.3 GROUP 3 FAULT CODES
Fig. 107 Group 3 flash sequences
Flash
sequence
Type of fault Fault Possible solutions/check
Light OFF No boiler demand - boiler is OK
Light ON Heating demand on boiler- boiler is OK
Group 3 Flashing codes
11 Locking HCM (Heat Control Module) Defective Incorrect, faulty, or missing HCM.
Replace HCM with correct item
Reset the boiler by turning the control knob anti-
clockwise to the reset position.
12 Locking Fan running too fast
Fan running too slow
No airflow after defined period of time
Fan not running
Defective fan or blocked air way.
Reset the boiler by turning the control knob anti-
clockwise to the reset position.
13 Locking Mains voltage interrupted after locking error Reset the boiler by turning the control knob anti-
clockwise to the reset position.
14 Locking Internal control board faults Call Worcester, Bosch Group technical help-line
0330 123 3366
15 Locking All other faults Miscellaneous
Reset the boiler by turning the control knob anti-
clockwise to the reset position.
1
34
2
1
34
2
1
34
2
1
34
2
1
34
2
1
34
2
1
34
2
1
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