Key To Symbols (Status) - Riello RL 190 Two-Stage Operation

2 Indicates the times relative to the firing stage
The leds illuminate in the following sequence, see fig. A:
WITH CONTROL DEVICE TR CLOSED:
1 - Burner off, TL open
2 - Control device TL closed
3 - Motor start:
seconds count starts on display V
4 - 1st stage valve energized
5 - 2nd stage valve energized
seconds count stops on display V
6 - 10 seconds after stage 5 the code I I I I will appear on the
display: this indicates that the starting phase is terminated.
WITH CONTROL DEVICE TR OPEN:
1 - Burner off, TL open
2 - Control device TL closed
3 - Motor start:
seconds count starts on display V
4 - 1st stage valve energized
7 - 30 seconds after stage 4:
seconds count stops on display V
8 - 10 seconds after stage 7 the code I I I I will appear on the
display: this indicates that the starting phase is terminated.
The times, in seconds, shown on display V, indicate the succes-
sion of the various starting stages described on pag. 19
STATUS (optional)
LED flashing
LED illuminated
Time in seconds
Burner start cycle terminated
27
3 In the case of burner malfunctions, the status panel
indicates the exact time at which the fault occurred.
There are 3 possible combinations of illuminated leds, see fig. B.
For the causes of the malfunction refer to the numbers shown in
brackets; see the legend on pag. 24 for interpretation of the num-
bers.
1.................... (9 ÷ 10)
2.................... (11 ÷ 33)
3.................... (32)

10.2.1 Key to symbols (STATUS)

= Power present
= Fan motor blocked (red)
= Burner lock-out (red)
= 2nd stage operation
= 1st stage operation
= Load level reached (Stand-by), led: on
D478
GB
D477
Fig. 29
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