172 425 16 08-01
5(5)
ELECTRIC EQUIPMENT
Control diagnosis under fault conditions and lockout indication
Gas burner control: LME...
During alarm trigger diagnostics, control outputs are to be disconnected from all
power.
– The burner is disconnected
– Exception, the «AL» alarm signal at connection block 10
– The burner is only to be reconnected after it is reset
– Press the reset button 0.5...3 s
Interface diagnostics
To switch to interface mode, hold the reset button depressed for more than 3 s. To
return to normal mode, hold the reset button depressed for more than 3 s. If the firing
unit is in the alarm mode, it is reset by pressing the reset button 0.5...3 s.
Connecting signal amplifier
Alarm control table
Red flashing code
on signal lamp
(LED)
Possible causes
Flashing 2 x
••
•
No flame at End of «TSA»
–
Defective or obscured flame monitor
–
Defective or obscured fuel valves
– Poor burner installation
–
Defective ignition unit
Flashing 3 x
•••
«LP»
defective
– No air monitor signal after «t10»
– «LP» is welded in the open position
Flashing 4 x
••••
Prohibited flame signal during start up
Flashing 5 x
•••••
Time out «LP»
– «LP» is welded in the closed position
Flashing 6 x
••••••
Free
Flashing 7 x
•••••••
Too many loss of flame during operation
– Poor burner installation
–
Defective or obscured fuel valves
–
Defective or obscured flame monitor
Flashing 8 x
••••••••
Free
Flashing 9 x
•••••••••
Free
Flashing 10 x
••••••••••
Connections fault or internal fault,
outgoing contacts or other fault
Flashing 14 x
••••••••••
••••
CPI contact not closed
A1 = LME
GP
R/W
L
N
br
bl
rt
sw
sw
rt
Q1 = AGQ 3...
QRA
1
11
12
2
Summary of Contents for STG 146
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