Shutter Faults
wire = Terminal
If the red LED’s fail to illuminate but the burner operates, it is likely that the 2 wires are crossed. This
must be corrected. Once corrected a full flame signal strength will be displayed/registered.
The Autoflame UV software utilises early spark termination within the internal flame safeguard control.
Therefore, detection of the ignition spark is allowed. During start-up the ignition is de-energised and the
pilot flame must be proven without the spark before the main fuel valves are open (safety shut off). Due
to the above statement it is not necessary to have a sight tube on the UV for pick-up. This, in fact, will
drastically reduce the flame pick-up.
If insufficient UV is detected, it is advised to use a swivel mount assembly (UVM60003/UVM60004) in
order to obtain maximum pick-up. This will allow the commissioning engineer to reliably sight the UV
for optimum performance and trouble free operation.
Note: Under no circumstances is a non-Autoflame UV scanner permitted to be used.
This is in breach of all codes and approvals associated with the Autoflame
combustion management system. This may lead to serious equipment damage,
critical injury or death.
If a non-Autoflame scanner is required then please contact Autoflame directly for technical support. For
The Autoflame system has internal components which protects itself against voltage/current spikes and
electrical interference. In some installations this internal protection is not enough, especially when the
main fuel valve Terminals 60 and 61 have been connected to older gas valves and voltage/current
spikes have occurred when the valves have been switched on or off. This can cause internal damage to
the MM Snubbers can be used on these old gas valves to protect the MM from these spikes; they
should be fitted across the power terminals of the gas valves. Please contact Autoflame Sales for more
information.
22.05.2017 Mk8 MM End User Guide Page 64
4 Errors and Lockouts
4.6 Troubleshooting and Further Information
4.6.1 UV
UV shutter fault– there are two LED’s on the back of the self-check UV. The red LED indicates the
presence of a flame; the yellow LED indicates shutter operation. The red LED will flicker in the presence
of UV light. Every 60 seconds the yellow LED will come on, indicating that the shutter is closing. The red
LED should then extinguish briefly. If this is not happening check the wiring to self-check UV sensor:
Green wire = Terminal 22
Yellow
21
Blue wire = Terminal 50
Red wire = Terminal 51
4.6.2 UV
Problems
more information on UV scanners, please refer to MM Flame Safeguard and Operation.
4.6.3 Snubbers
To Next Page
Loading...
