Technical data

55
STRATA1
22.1 Screen display/Diagnosis of faults (contd)
STATUS MESSAGES (FLASHING DISPLAY) INDICATING A FAULT
A flashing display indicates a fault and that the boiler has shutdown (lockout). The boiler will not attempt
to operate until the “red” reset button is pressed.
Any repetitive flashing fault message should be investigated, the cause found and corrective action taken.
for each flashing display message there is a possible cause, see list of cause numbers following the “flashing
status” list.
DISPLAY MESSAGE MEANING CAUSE NUMBER/S
FLASHING
Wat 1 Lockout Lower ht/exch high limit stat has 5,6,7,8,21,24,25,26,31
tripped.
Wat 2/Flue Lo Upper ht/exch high limit or flue 2,5,6,7,8,21,24,25,26,31
limit stat has tripped
Fan 1 high Lower burner fan speed is too high 9,11,29,31,33
Fan 1 low Lower burner fan speed during
pre-purge is too low 9,10,11,14,18,29,31,33
Fan 1 oper Lower burner fan is detected as 3,4,11,29,31
operating when should be idle
Ignit 1 fault Ignition to lower burner has not 12,13,15,16,17,19,22,
been successful after 4 attempts 23,27,29,30,31,35
Flame 1 out Flame at lower burner has been 13,15,17,19,20,23
lost on 4 consecutive occasions
during operation
Flame 1 on w/ Flame is detected at the lower 17,19,30
burner when there should be no
flame
S1 interrupt Lower ht/exch flow temperature
sensor interrupted 3,5,33
S3 interrupt Upper ht/exch flow temperature 3,5,33
sensor interrupted
S4 interrupt Return temperature sensor 3,5,33
interrupted
S7 interrupt Mixed flow temperature sensor 1,3,5,33
interrupted. Only when MR03 unit
installed
Program end Follows reprogramming of control
panel with laptop PC, not a fault
- just press reset button
Fan 2 high Upper fan speed too high 9,11,29,31,33