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LB 381 BLU 500 -1400 PR / MD B
SATRONIC DMG 972 CONTROL INFORMATION SYSTEM
The SATRONIC DMG 972 control is a micro-processor control which provides information about the current opera-
tion of the burner and the cause of any faults. The information is available by reading the “flash code” at the red LED
within the lockout reset button as detailed below. By the use of additional monitoring equipment a short history of
recorded faults is also available. There are two types of additional monitoring devices available from Satronic Ltd. The
“satropen” is a small pocket reader designed to give a visual read out of status, flame current and supply voltage.
Computer software is available to allow access to the current information and stored data.
FAULT DISPLAY MESSAGES
On burner failure the red LED is permanently illuminated for a period of approximately 10 seconds, followed by a
brief “dark phase”, then one of the following flash codes will indicate the cause of the fault. This indication will repeate
as long as the lockout reset button is not reset.
Message Flash-Code
waiting for air proving ❘ ❘.
switch
pre-purge (tv1) ❘ ❘ ❘ .
pre-ignition (tvz) ❘ ❘ ❘ ❘.
safety time (ts) ❙ ❘.
delay 2nd stage (tv2) ❙ ❘ ❘ .
running ❘ _
low mains voltage ❘ ❙ ❙ _
Flash-Code Key
short pulse ❘
long pulse ❙
short pause .
long pause _
Error diagnosis
Error message Flash-Code Possible fault
lockout ❘ ❙ ❙ ❙ ❙ within lock out safety time
safety time no flame establishment
air proving switch ❘ ❙ ❘ ❘ ❘ air proving switch
in closed position contact welded
air proving switch ❘ ❘ ❘ ❙ ❙ air proving switch does not
time-out close within specified time
air proving switch ❘ ❘ ❘ ❘ ❙ air proving switch opens
opened during start or operation
loss of flame ❙ ❙ ❙ ❙ ❘ loss of flame during operation
Flash-Code for manual lock out
manual/external ❘ ❘ ❙ ❙ ❙ ❙ ❙ ❙ ❙ ❙
lock out
CONTROL BOXES LANDIS & STAEFA LGB22
The Landis control box starts the fan and begins the pre-purging of the combustion chamber. The air pressure switch controls the
correct operation. At the end of the pre-purging phase, the ignition transformer cuts-in followed by the opening of the gas valves.
In case of missed ignition or accidental shutdown, the ionisation probe cuts-in and set the burner in lockout mode within the safety
time.
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