Riello RS 44/E MZ Installation, Use And Maintenance Instructions page 41

Faults - Possible causes - Solutions
6
Failure
Diagnostic
code
code
85 #
Bit 0
Valence 1
Bit 1
Valence 2...3
Bit 7

Valence 128
86 #
0
Bit 0
Valence 1
Bit 3

Valence 8
Bit 4

Valence 16
87 #
0
Bit 0
Valence 1
Bit 3

Valence 8
Bit 4

Valence 16
90 - 91 #
93 #
3
95 #
3 Ignition transformer
4 Fuel valve 1
5 Fuel valve 2
6 Fuel valve 3
96 #
3 Ignition transformer
4 Fuel valve 1
5 Fuel valve 2
6 Fuel valve 3
97 #
0
Meaning of the system REC27.100A2
Reference error of a servomotor
Reference error of the fuel servomotor
Reference error of the air servomotor
Reference error owing to parameter modification
Fuel servomotor error
Position error
Circuit open
Curve too steep in terms of train ratio
Deviation of section compared with the last reference
Air servomotor error
Position error
Circuit open
Curve too steep in terms of train ratio
Deviation of section compared with the last reference
Burner internal checking error
Flame signal acquisition error
Short circuit of the sensor
Relay supervision error
External power supply - Contact active
Relay supervision error
The relay contacts have joined together
Relay supervision error
The safety relay contacts have joined together or the safety
relay has been powered by an external power supply
Recommended measures
The reference of the fuel servomotor was not successful.
It was not possible to reach the reference point.
1. Check if the servomotors have been inverted.
2. Check if the servomotor is blocked or overloaded.
The reference of the air servomotor was not successful.
It was not possible to reach the reference point.
1. Check if the servomotors have been inverted.
2. Check if the servomotor is blocked or overloaded.
The parameterization of an actuator (e.g. the reference
position) has been modified. This error will be visualised to
start up a new reference.
It was not possible to reach the target position within the requested
tolerance range.
1. Check if the servomotor is blocked or overloaded.
Circuit open shown on the servomotor connection.
1. Check the wiring.
The slope of the curve can correspond to a maximum position
modification of 31° between 2 points of the modulation curve.
Overloading of the servomotor or servomotor subjected to
mechanical torsion.
1. Check if the servomotor is blocked in any point along its range of
action.
2. Check if the torque is sufficient for the application.
It was not possible to reach the target position within the requested
tolerance range.
1. Check if the servomotor is blocked or overloaded.
Circuit open shown on the servomotor connection.
1. Check the wiring.
The slope of the curve can correspond to a maximum position
modification of 31° between 2 points of the modulation curve.
Overloading of the servomotor or servomotor subjected to
mechanical torsion.
1. Check if the servomotor is blocked in any point along its range of
action.
2. Check if the torque is sufficient for the application.
Short circuit in the QRB sensor...
1. Check the wiring.
2. Flame detector probably faulty.
Check the wiring.
Check the contacts:
1. Control box connected to the power supply: the fan output must
be without voltage.
2. Disconnect the power supply. Disconnect the fan. The
resistive connection between the fan output and the neutral wire
is not allowed.
If one of the 2 tests fails, replace the control box because the
contacts are definitively joined together and it is no longer possible
to guarantee safety.
Check the contacts:
1. Control box connected to the power supply: the fan output must
be without voltage.
2. Disconnect the power supply. Disconnect the fan. The
resistive connection between the fan output and the neutral
wire is not allowed.
If one of the 2 tests fails, replace the control box because the
contacts are definitively joined together and it is no longer possible
to guarantee safety.
39
GB
6383