Atmos Multi Mk2, Manual, Page: 10 / 19

APPENDIX 2. Fault Finding
1. GENERAL
The
Atmos Multi has 3 types of error messages:-
1. Warning messages
In this case, instead of the status message, a letter appears on the diagnostic display for one second, once every 5
seconds.
2. Blocking messages
A permanently illuminated letter appears on the diagnostic display.
3. Malfunction messages
A flashing letter or number appears on the diagnostic display.
In the event of a warning message, the function to which the message applies will be switched off while the appliance
continues to operate.
In the event of a malfunction message, the entire appliance will be shut down requiring manually resetting before the
boiler will continue operation.
OPERATING CODES ON ATMOS MULTI
See also Table 1 in Section 5 of the Manual. The following appear on the status display:-
1 Hot water heating operating
2 Central heating operating
3
Hot water and central heating – priority to hot water
4 Hot water and central heating - supply to both
The dot in the bottom right hand corner of the diagnostic display indicates the following burner function:-
No dot
No burner
Slow flashing dot Minimum fire
Increasingly fast flashing dot Higher & higher firing
Constant dot Burner on maximum output
The dot in the bottom right hand corner of the central heating display: -
Dot
Motorised valve energised to send
water to the central heating circuit
ATMOS MULTI Mk2 version 2004 Appendix Page 10