C.I.B. UNIGAS
- M039231CB
36
Checking the detection current
To check the detection signal follow the scheme in Fig. 20. If the signal is less than the value indicated, check the position of the detec-
tion electrode or detector, the electrical contacts and, if necessary, replace the electrode or the detector.
Fig. 20
CAUTION:
Permissible length of flame detector cable (laid separately): 3 m (core-earth 100 pF / m).
Extraneous light
Extraneous light during standby (phase 12) leads to start prevention, followed by a restart.
Extraneous light during the prepurge phase leads to immediate lockout.
If extraneous light occurs during the shutdown phase, the system switches to the safety phase.
One repetition is permitted. This means that if the error occurs again the next time the system is shut down, the unit initiates lockout.
Seasonal stop
To stop the burner in the seasonal stop, proceed as follows:
1
turn the burner main switch to 0 (Off position)
2
disconnect the power mains
3
close the fuel valve of the supply line
Burner disposal
In case of disposal, follow the instructions according to the laws in force in your country about the “Disposal of materials”.
NOTE: there is no linear relation between the flame percentage shown on display (parameter no. 954) and the detection signal
values.
Device
Minimum detection signal
Siemens LMV2
4 μA (values on display: 30%
)
Error code
Diagnostic code
Actions
93
3
Sensor short-circuit
Protective earth PE
Ionization probe (ION)
QRB.../ QRC... signal voltage
QRB... GND
1
2
3
4
5
L
X10-05
QRA... (-)
QRA... (+)
1
2
X10-06
+
