7
E
. 04.
99•
G.
13
.1
1.
02
Function
Function
Control box MMI 810 Mod. 33 / DMG 970
Danger of death due to electric shocks!
Disconnect electrical cable from power supply before carrying out any work on live parts!
Fault elimination only by authorized skilled personnel !
Unlocking may only be carried out by an authorised specialist.
Control box MMI 810
program sequence for MMI 810 and DMG 970
Troubleshooting with the aid of the program display on MMI 810:
(see also table Fault Diagnosis page 19)
The coloured program indicator is retained in the event of a shutdown on faults. The colour of the area to
which the black marker points indicates the nature of the shutdown on faults.
Control box DMG 970
Fault cause diagnosis DMG 970
In the event of an error the LED lights up permanently. This light
is interrupted every 10 secs. and a blink code emitted which
provides information about the cause of the fault.
From this results the following sequence which is repeated until
the defect is acknowledged, i.e. the device is cleared of the
fault.
Following sequence:
Fault message
Blink code
Cause of defect
Fault shutdown safety time
no flame detection within the safety time period
Extraneous light fault
Extraneous light during the monitored phase, possibly
defective sensor
Air controller in working posi-
tion
Air controller contact welded
Air controller time-out
Air controller does not close in a defined time span
Air controller opens
Air controller contact opens during start-up or operation
Flame failure
Flame failure signal in operation
Coloured
program
indicator
Main switch
Safety thermostat
Control thermostat
Control unit
Motor/air-pressure monitor
Servo drive SA1-F
t
w
t
1
t
z
t
s
Ignition transformer
Stage 1 SV / SMS
Ionisation
t
ö
(RG1-L only)
tö
= opening time SA 2-F
tw
= waiting time, start
t
1
= pre-ventilation time
t
s
= safety time
t
z
= ignition time, total
Light phase
Dark phase
lasts 10 secs.
lasts 0.6 secs.
Dark phase
lasts 1.2 secs.
Blink code
