Group 3 Fault Codes - Worcester Greenstar Ri Compact ErP Installation, Commissioning And Servicing Instructions

8.1.3

Group 3 fault codes

Flash
sequence Type of fault
Light OFF
Light ON
Group 3 Flashing codes
11 Locking
12 Locking
13 Locking
14 Locking
15 Locking
11 5 seconds off
12 5 seconds off
13
5 seconds off
14
5 seconds off
15
5 seconds off
Fig. 102 Group 3 flash sequences
Greenstar Ri Compact ErP 6720813282 (2015/07)
Fault
HCM (Heat Control Module) Defective
Fan running too fast
Fan running too slow
No airflow after defined period of time
Fan not running
Mains voltage interrupted after locking error
Internal control board faults
All other faults
Fault code group 3
1 to 5 flashes followed by 4 fast flashes
1 2
5 seconds off
3 4
1 2
5 seconds off
3 4
1 2
5 seconds off
3 4
1 2
3 4
Possible solutions/check
No boiler demand - boiler is OK
Heating demand on boiler- boiler is OK
Incorrect, faulty, or missing HCM.
Replace HCM with correct item
Reset the boiler by turning the control knob anti-
clockwise to the reset position.
Defective fan or blocked air way.
Reset the boiler by turning the control knob anti-
clockwise to the reset position.
Reset the boiler by turning the control knob anti-
clockwise to the reset position.
Call Worcester, Bosch Group technical help-line
0330 123 3366
Miscellaneous
Reset the boiler by turning the control knob anti-
clockwise to the reset position.
1 2
3 4
1 2
3 4
5 seconds off
1 2
5 seconds off
3 4
Fault finding and diagnosis
1 2
3 4
1 2
3 4
6720646610-68.3Wo
1 2
3 4
55