Group 2 Fault Codes - Worcester Greenstar Ri Compact ErP Installation, Commissioning And Servicing Instructions

Fault finding and diagnosis
8.1.2

Group 2 fault codes

Flash
sequence Type of fault
Light OFF
Light ON
Group 2 Flashing codes
6 Locking
7 Locking
8 Blocking
9 Locking
10 Locking
1
6 5 seconds off
3
1
7
5 seconds off
3
1
8 5 seconds off
3
1
9 5 seconds off
3
1
10
5 seconds off
3
Fig. 101 Group 2 flash sequences
54
Fault
Sensor test failed
Safety temperature too high
MAX safety thermostat activated
Return temperature too high
Flow temperature too high -
Supply sensor exceeded 110°C
Fault code group 2
1 to 5 flashes preceeded by 4 fast flashes
2
5 seconds off
4
2
5 seconds off
4
2
5 seconds off
4
2
4
2
4
Possible solutions/check
No boiler demand - boiler is OK
Heating demand on boiler- boiler is OK
On power up all safety sensors are checked, the
check failed.
Reset the boiler by turning the control knob anti-
clockwise to the reset position.
The main heat exchanger has overheated.
Maximum temperature 105°C.
Reset the boiler by turning the control knob anti-
clockwise to the reset position.
Flue gas thermostat overheat or APS activated
Boiler overheat.
Reset the boiler by turning the control knob anti-
clockwise to the reset position.
Primary flow sensor overheated.
Reset the boiler by turning the control knob anti-
clockwise to the reset position.
1 2
3 4
1 2
3 4
1 2
3 4
1 2
5 seconds off
3 4
5 seconds off
1 2
3 4
6720646610-67.2Wo
Greenstar Ri Compact ErP 6720813282 (2015/07)