Faults - Probable Causes - Solutions; Normal Operation / Flame Detection Time - Riello RS 50/M MZ Manuel D'entretien

Faults - Probable causes - Solutions

6
SIGNAL
10 blinks The burner does not
switch on, and the
lockout appears
The burner goes into
lockout
No blink The burner does not
start
The burner continues
to repeat the start-up
cycle, without lockout
Ignition with pulsa-
tions
Burner does not
reach maximum
output
Burner stops with air
damper open
6.1

Normal operation / flame detection time

The control box has a further function to guarantee the correct burner operation (indicator: GREEN LED permanently on).
To use this function, wait at least ten seconds from the burner ignition and then press the control box button for a minimum of 3
seconds.
After releasing the button, the GREEN LED starts flashing as shown in the figure below.
GREEN LED on
press reset for 10s
The pulses of the LED constitute a signal spaced by approximately 3 seconds.
The number of pulses will measure the probe DETECTION TIME since the opening of gas valves, according to the following table:
SIGNAL
1 blink
2 blinks
6 blinks
FAULT PROBABLE CAUSE
34 - Incorrect electrical wiring . . . . . . . . . . . . . . . . . . . . . . Check connections
35 - Defective control box . . . . . . . . . . . . . . . . . . . . . . . . . Replace
36 - Presence of electromagnetic disturbances in. . . . . . . Filter or eliminate
the thermostat lines
37 - Presence of electromagnetic disturbance . . . . . . . . . Use the radio disturbance protection kit
38 - No electrical power supply . . . . . . . . . . . . . . . . . . . . . Close all switches - Check connections
39 - A limiter or safety control device is open . . . . . . . . . . Adjust or replace
40 - Line fuse blocked . . . . . . . . . . . . . . . . . . . . . . . . . . . . Replace
41 - Defective control box . . . . . . . . . . . . . . . . . . . . . . . . . Replace
42 - No gas supply. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Open the manual valves between contactor
43 - Mains gas pressure insufficient . . . . . . . . . . . . . . . . . Contact your GAS COMPANY
44 - Minimum gas pressure switch fails to close . . . . . . . . Adjust or replace
45 - Servomotor fails to move to min. ignition position . . . Replace
46 - The gas pressure in the network is near the value. . . Reduce the cut in pressure of the
on which the min. gas pressure switch gas is
adjusted.The sudden drop in pressure when the
valve is opened causes the temporary opening of
the pressure switch itself, the valve immediately
closes and the burner comes to a halt.
Pressure increases again, the pressure switch closes
and the ignition cycle is repeated. And so on.
47 - Head poorly adjusted . . . . . . . . . . . . . . . . . . . . . . . . . Adjust, see Fig. 15
48 - Ignition electrode incorrectly adjusted . . . . . . . . . . . . Adjust it, see Fig. 12
49 - Incorrectly adjusted fan air damper: too much air . . . Adjust
50 - Output during ignition phase is too high . . . . . . . . . . . Reduce
51 - Control device TR does not close . . . . . . . . . . . . . . . Adjust or replace
52 - Defective control box . . . . . . . . . . . . . . . . . . . . . . . . . Replace
53 - Defective servomotor . . . . . . . . . . . . . . . . . . . . . . . . . Replace
54 - Servomotor defective . . . . . . . . . . . . . . . . . . . . . . . . . Replace
Press button
for > 3s
FLAME DETECTION TIME
0.4 s
0.8 s
2.8 s
Signal

This is updated in every burner start-up.
Once read, the burner repeats the start-up cycle by
briefly pressing the control box button.
WARNING
If the result is > 2 s, ignition will be retarded.
Check the adjustment of the hydraulic brake of the gas
valve, the air damper and the combustion head adjust-
ment.
25
GB
SUGGESTED REMEDY
and train
min. gas pressure switch
Replace the gas filter cartridge
Interval Signal
3s

6463