2754
11
GB
N.B.: If problems still occur after all of the above checks have been made, check the electrical connec-
tions on the plug and sockets, the damper and burner motor, gas control wiring ignition transformer
and external interlocks, if the burner still fails to function, replace the control box.
No blink The burner does not
start
35 - No electrical power supply . . . . . . . . . . . . Close all switches - Check connec-
tions
36 - A limiter or safety control device is open. . Adjust or replace
37 - Line fuse blocked . . . . . . . . . . . . . . . . . . . Replace
38 - Defective control box. . . . . . . . . . . . . . . . . Replace
39 - No gas supply . . . . . . . . . . . . . . . . . . . . . . Open the manual valves between
contactor and train
40 - Mains gas pressure insufficient. . . . . . . . . Contact your GAS COMPANY
41 - Minimum gas pressure switch fails . . . . . .
to close
Adjust or replace
The burner continues
to repeat the start-up
cycle, without lockout
42 - The gas pressure in the gas mains lies
very close to the value to which the mini-
mum gas pressure switch has been set.
The sudden drop in pressure after valve
opening causes temporary opening of the
pressure switch itself, the valve immedi-
ately closes and the burner comes to a
halt. Pressure increases again, the pres-
sure switch closes again and the ignition
cycle is repeated. And so on
Reduce the minimum gas pressure
switch intervention pressure.
Replace the gas filter cartridge.
Ignition with pulsations 43 - Poorly adjusted head . . . . . . . . . . . . . . . . Adjust. See page 6
44 - Ignition electrode incorrectly adjusted. . . . Adjust, see page 4
45 - Incorrectly adjusted fan air damper: too
much air
Adjust
46 - Output during ignition phase is too high . . Reduce
Signal Problem Possible cause Recommended remedy
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