20154169
34
GB
Problems - Causes - Remedies signalled by LED indicators
When an emergency stop occurs, the control device LEDs indicate
the cause of the stop.
The terminal T3 is not powered.
The device operating status is internally memorised in case of lack
of power supply.
The device lock-out condition can be caused by pressing (<1sec.)
the reset button on the flame control front side or through the
remote reset - terminal T21 on the base.
The reset button is very sensitive, do not press it strongly during the
reset operation.
Unlocking the control device
The RFGO control device can be reset in two ways: reset button
and remote reset terminal.
The remote reset must be a normally open connected button
between T21 and flame control power supply voltage (see
illustrative diagrams):
•
the reset is performed when a faulty condition is detected by
the flame control.
•
Press the reset button to reset the system after a lock-out.
•
Pressing the reset button during operation will cause an
emergency stop.
•
The reset or emergency stop condition can be obtained also by
using the remote reset with the same modalities.
•
The number of reset attempts is limited to a maximum of 5
within 15 minutes.
Error / RFGO LED lock-out Codes
During an alarm condition, the status LED becomes steady red.
The remaining LEDs turn on according to a coded sequence which
identifies the lock-out cause.
The following table shows the different LED Lock-out codes.
8
Problems - Causes - Remedies signalled by LED indicators
WARNING
The device described in this manual can cause
material problems, severe injuries or death.
It is the owner or user’s responsibility to make sure
that the equipment described is installed, used and
commissioned in compliance with the requirements
provided both by national and local law. The lock-
out condition indicates the presence of a fault
which occurred during the operating cycle or during
stand-by mode.
Before performing an unlock attempt, it is
necessary to restore the original optimal operating
conditions.
WARNING
Thermal unit’s operation, maintenance and
troubleshooting interventions must be carried out
by trained personnel.
The persons who solve lock-out problems or reset
the control device must observe the error codes to
solve the problems described in this product
technical data sheet.
It is not admitted to tamper with or act on the
system or control in a way that could compromise
the product safety or warranty.
Any tests on safety devices or on loads, such as fan
motor, valves, igniter, flame sensors, must be
performed with the shut-off valves closed and by
qualified personnel.
Do not by-pass nor exclude the safety devices
connected to the flame control.
Failure to observe these guidelines will exclude any
liability.
WARNING
The regulation prohibits the system from allowing
more than 5 remote reset attempts within a 15
minute time window.
If more than 5 attempts are performed without
solving the lock-out, the system will prevent the
user to perform further remote resets and force
him/her to wait for the 15 minutes to elapse.
The remote reset operation will be restored at the
end of the waiting time.
It is recommended that qualified personnel
evaluate the lock-out condition and implement the
solution which is suitable for the fault to be solved.
Summary of Contents for RS 28/M
Page 2: ...Original instructions...
Page 47: ......
