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9.14 Maintenance code table
Maintanance codes
Maintenance description
1
Burner operating hours exceeded
2
Burner starts exceeded
3
Maintenance interval exceeded
9.15 Operating phases of the
Control Centre LMS
Press the information key to display the operating phases.
Phase no.
Display Operating state
Description of function
STY
Standby (no heat demands)
Burner on stand-by
THL1
Fan start-up
Self-test for burner start and fan start-up
THL1A
TV
Pre-purging time
Pre-purging, fan deceleration time to starting load speed
TBRE
Waiting time
Internal safety tests
TW1
TW2
VDE
Ignition phase
Ignition and start of safety time for flame formation, ioni-
sation current build-up
tsa1
Safety time constant
Flame monitoring with ignition
tsa2
Safety time variable
Flame monitoring without ignition
it
Interval time
Flame stabilisation
MOD
Modulating mode
Burner in operation
THL2
Subsequent ventilation with last operating
fan speed
Fan continues to run
THL2A
Subsequent ventilation with pre-purging fan
speed
Fan continues to run
TNB
Burner shut-off delay
Permitted burner run-on time
TNN
Overrun time
Permitted fan run-on time
STV
Start prevention
No internal or external release exists (e.g. no water pres-
sure, lack of gas)
SAF
Safety switch-off
STOE
Fault position
The actual fault code is displayed, see
fault code table
Maintenance
144
Condensing gas boiler Eurocondense three125-300 kW
7308536-02 06.13