Siemens RMG 508SE User manual

CONTROL BOX RMG 508SE
3001138
2894
1
GB
The new RMG 508SE control box, fitted with the reset button extension, replaces control box 508SE, but
does not replace the old 505SE version.
Control box RMG 508SE does not have a delay time between the second stage (terminal 14) and third
stage (terminal 11), as shown on the control box’s diagram under the cover - consequently, you will need to
check the burner for malfunctions.
RESETTING THE CONTROL BOX AND USING DIAGNOSTICS
The control box features a diagnostics function through which any causes of malfunctioning are easily iden-
tified (indicator:
RED LED ).
To use this function, you must wait at least 10 seconds once it has entered the safety condition (
lock-out ),
and then press the reset button.
The control box generates a sequence of pulses (1 second apart), which is repeated at constant 3-second
intervals.
Once you have seen how many times the light pulses and identified the possible cause, the system must
be reset by holding the button down for between 1 and 3 seconds.
The methods that can be used to reset the control box and use diagnostics are given below.
RESETTING THE CONTROL BOX
To reset the control box, proceed as follows:
➣
Hold the button down for between 1 and 3 seconds.
The burner restarts after a 2-second pause once the button is released.
If the burner does not restart, you must make sure the limit thermostat is closed.
VISUAL DIAGNOSTICS
Indicates the type of burner malfunction causing lock-out.
To view diagnostics, proceed as follows:
➣
Hold the button down for more than 3 seconds once the red LED (burner lock-out) remains steadily lit.
A yellow light pulses to tell you the operation is done.
Release the button once the light pulses. The number of times it pulses tells you the cause of the mal-
function, indicated in the table below.
Once the operations are done, the control box’s initial state must be restored using the resetting procedure
described above.
BUTTON PRESSED FOR CONTROL BOX STATUS
Between 1 and 3 seconds Control box reset without viewing visual diagnostics.
More than 3 seconds Visual diagnostics of lock-out condition:
(LED pulses at 1-second intervals).
ATTENTION
THIS OPERATION MUST BE CARRIED OUT BY A QUALIFIED TECHNICIAN
=== = = = = = = =
Press reset
for >3s 3sPulses Pulses
RED LED on
wait at least 10s Interval Lock-out

2894
2
GB
The sequence of pulses issued by the control box identifies the possible types of malfunction, which are
listed in the table below.
SIGNAL PROBABLE CAUSE
2 pulses
==
The flame does not stabilise at the end of the safety time:
– faulty ionisation probe;
– faulty or soiled gas valves;
– neutral/phase exchange;
– faulty ignition transformer
– poor burner regulation (insufficient gas).
3 pulses
===
Min. air pressure switch does not close:
– air pressure switch faulty;
– air pressure switch incorrectly regulated;
– max. air pressure switch triggered (if installed).
4 pulses
====
Min. air pressure switch does not open or light in the chamber before firing:
– air pressure switch faulty;
– air pressure switch incorrectly regulated.
7 pulses
=======
Loss of flame during operations:
– poor burner regulation (insufficient gas);
– faulty or soiled gas valves;
– short circuit between ionisation probe and earth.
10 pulses
=====
=====
– Wiring error or internal fault.