Riello GAS 6 P/M, Инструкции по установке, использованию и обслуживанию

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OPERATION TROUBLES AND THEIR CAUSES
The symbol, visible on the reading disc of the pointer, shows the kind of problem.
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The control box does not start at the thermostats closing, because of:
- lack of gas;
- the gas pressure switch does not close the contact: bad set;
- the air pressure switch changed over in operation position;
- the control box fuse is broken;
- the servomotor does not totally change over the closing circuit in being between the terminals 11 and 8 of the
control box.
Stop at the start-up, because of:
- the servomotor does not change over the max. opening circuit in being between the terminals 9 and 8 of the control
box.
P
Lock-out
The air pressure switch does not change over, because of:
- defective contact;
- insufficient pressure of the air.
O
Lock-out
Unperfect operation of the flame detecting circuit, because of:
- probe to earth;
- defective internal amplifier.
P
Stop during pre-purge phase, because of:
the servomotor does not change over the minimal opening circuit in being between the terminals 10 and 8 of the
control box.
1
Lock-out due to flame signal lack; if:
- the ionisation probe is not inside of the flame;
- the probe connection to the control box is disconnected;
- the ionization current is insufficient (min. 6 µA).
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Lock-out during operation due to:
- flame signal lack;
- no air pressure.
NOTICE
- If lock-out occurs between the start-up and pre-ignition phase without that a symbol comes out, the cause is the
flame simulation.
- If the burner repeats continuously the start-up cycle without lock-out occurring, this is due to the “oscillation” of the
gas pressure switch caused by a setting very near to the gas network pressure, therefore the pressure decreasing
at the burner start-up is sufficient to actuate the gas pressure switch causing a new start-up.