Sirius FS
69
GB/IE
7.7 FAULT CODE TABLE (CONTINUED)
Code Display Description
Causes / Rectification
151
BMU internal error
Switch power off and then back on to appliance. Reset appliance
If problem persists, check polarity to appliance is not reversed.
Replace LMS14 PCB.
152
Parameterization error
Incorrect / Conflicting parameters input. Review the last revised
parameters input to locate conflict.
153
Unit Locked
Reset button has been pushed in for more than 10 seconds. Push
reset for 1 - 2 seconds to reset the fault. If symptoms persist check
reset button operation and if OK, replace LMS14 Interface PCB.
160
Fan speed threshold not reached
Required fan speed not reached - Check fan connections or replace
faulty fan unit.
162
Air pressure switch
Air control valve operation (opening) has not been detected by the
control system, after the fan has switched on. Check the operation
of the air control valve , position sensor, relays and check for flue
blockage.
164
Flow pressure switch HC
Check for condensate blockage, flue blockage or restriction and
pressure switch operation. Check pressure switch value is 100 Pa
above the maximum pressure generated inside the flue system,
when the boiler is operating from cold.
166
Air Pressure Switch
Air control valve operation (closing) has not been detected by the
control system, after the fan has switched off. Check the operation
of the air control valve, position sensor, relays and check the flue
draught does not exceed 0.2 mbar (see section 5.5.2)
192
Start Prevention
The burner interlock system, prevents the operation of an individ-
ual burner, if the Air Control Valve on the opposite burner is open
and the burner is in a lockout condition. Check operation of the air
control valve, position sensor, relays and check the flue draught
does not exceed 0.2 mbar (see section 5.5.2)
218
Pressure supervision
Water pressure inside boiler is low but not yet critical. Boiler will
continue to operate but at 80% of maximum output. Full output
power will not be available until the water pressure is at or above
minimum levels
(see 3.2)
323
Water press 3 too low
Water pressure inside boiler is too low for safe operation. Opera-
tion will automatically resume once water pressure is at or above
minimum levels
(see 3.2)