Riello RS 70/E MZ Installation, Use And Maintenance Instructions page 39

Faults - Possible causes - Solutions
6
Error
Diagnostic
Meaning of the system REC27.100A2
code code
85 # Reference error of a servomotor
Bit 0
Reference error of the fuel servomotor
Valence 1
Bit 1
Reference error of the air servomotor
Valence 2...3
Bit 7
Reference error owing to parameter modification
≥
Valence 128
86 # Fuel servomotor error
0 Position error
Bit 0
Circuit open
Valence 1
Bit 3
Curve too steep in terms of train ratio
≥
Valence 8
Bit 4
Deviation of section compared with the last reference
≥
Valence 16
87 # Air servomotor error
0 Position error
Bit 0
Circuit open
Valence 1
Bit 3
Curve too steep in terms of train ratio
≥
Valence 8
Bit 4
Deviation of section compared with the last reference
≥
Valence 16
90 - 91 # Burner internal checking error
93 # Flame signal acquisition error
Short circuit of the sensor
3
95 # Relay supervision error
3 Ignition
transformer
4 Fuel valve 1 External power supply - Contact active
5 Fuel valve 2
6 Fuel valve 3
96 # Relay supervision error
3 Ignition
transformer
4 Fuel valve 1
The relay contacts have joined together
5 Fuel valve 2
6 Fuel valve 3
97 # Relay supervision error
The safety relay contacts have joined together or the
safety relay has been powered by an external power
0
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.
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GB