7
E. 04.99• G.13.11.07
Function
Function
Control unit DMG 970 / 972
Function test of control box
Danger of death due to electric shocks!
Disconnect electrical cable from power supply before
carrying out any work on live parts!
Faults may only be rectified by authorised trained per-
sonnel!
Unlocking may only be carried out by an authorised spe-
cialist.
Carry out the following checks after commissioning and each time after the burner has been serviced:
Jumper gas pressure monitor: to do so, detach grey cube connector on KE and remove cover. Close ball
valve during operation with jumpered gas pressure monitor: device must go into fault mode immediately
after flame failure.
Start-up with closed ball valve and jumpered gas pressure monitor: device must go into fault mode after
safety time has elapsed.
After completion of check, reverse connection and re-establish original status.
Check air pressure monitor contact: device goes into fault mode when silicone connecting hose is deta-
ched. Re-attach hose to connecting point “+”.
Jumper air pressure monitor before start-up: After 10 seconds, an intermittent fault is output and then au-
tomatically reset. A second start-up attempt is made. If the air pressure monitor contact is still closed, a
true fault shutdown is triggered. If the air pressure monitor contact opens within 10 seconds, the burner
becomes operational.
Safety and switching functions
In the event of a flame failure during operation, the fuel supply is immediately switched off and the control
box goes into fault mode within 1 sec.
A restart takes place in all cases following a mains power failure.
A fault is triggered immediately if there is flame detection during pre-ventilation.
The position of the air pressure monitor is continuously checked. There can be no start-up if it is not in its
neutral position. A fault is triggered if the working contact fails to close during pre-ventilation, or reopens.
Bei Luftmangel während des Betriebes öffnet der Luftdruckwächterkontakt und die Ventile schließen sofort.
The device goes into fault mode within 1 sec.
Fault cause diagnosis
In the event of a fault, the LED remains continuously lit. Every 10 seconds this is interrupted and a flash
code is emitted that provides information about the fault. From this results the following sequence, which is
repeated until the error is acknowledged, i.e. the fault on the unit has been cleared.
Following sequence:
Readout device for display of the fault code:
SatroPen Art. no. 47-10-22542
SatroCom Art. no. 47-10-22563
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