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Error
Diagnostic code
code
85
#
0
1
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 transformers
4 Fuel valve 1
5 Fuel valve 2
6 Fuel valve 3
96
#
3 Ignition transformers
4 Fuel valve 1
5 Fuel valve 2
6 Fuel valve 3
20205048
Faults - Possible causes - Solutions
Meaning of the REC 27.100A2 system
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
56
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 parameterisation 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 voltage between pin 5 or 6 and 2 of the
X54 connector must be > 0.5 V).
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 voltage between pin 5 or 6 and 2 of the
X54 connector must be > 0.5 V).
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. flame control 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 flame control because the
contacts are definitively joined together and it is no longer
possible to guarantee safety.
GB
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