3342
14
GB
6.
FAULTS / SOLUTIONS
Below is a list of some of the causes and possible solutions to a series of problems that might be encountered
and could cause a failure to start or irregular burner operation.
The indicator inside the control box's reset button (1, fig. 1, page 2) lights when there is trouble, which in most
cases is an operating malfunction. When this indicator lights, burner operation can only be resumed after
pushing the reset button all the way in. If the burner then ignites correctly, the lockout can be attributed to a
temporary, non-hazardous fault. However, if lockout continues, you must determine the cause of the problem
and take the action illustrated in the solution column in the tables below.
6.1
START-UP PROBLEMS
FAULT
POSSIBLE CAUSE
SOLUTION
T h e b u r n e r d o e s n ’ t
start when the limit
thermostat closes.
No power supply.
Check for voltage at L1-N terminals in
7-pin plug.
Check state of fuses.
Check that safety thermostat is not
locked out.
No gas.
Check gate opening.
Make sure that valve has changed
over to open position and that there
are no short circuits.
Control box connections are wrong-
ly inserted.
Check and insert plugs fully into
sockets.
Burner performs pre-
purging and ignition
c y c l e n o r m a l l y a n d
locks out after 3 igni-
tion attempts.
Phase-neutral connection is inverted.
Swap them over.
Earth connection non-existent or
ineffective.
Make earth connection efficient.
Valve lets too little gas through
Check supply grid pressure and/or ad-
just valve as indicated herein.
Gas valve is defective.
Replace.
Electric ignition arc is irregular.
Make sure connectors are inserted
properly.
Make sure electrode is in the right po-
sition as indicated herein.
Inspect quality of ceramic insulator.
Ionization probe has a ground fault
or is not in contact with flame, or
there is a break in its wiring to con-
trol box, or there is a ground fault
due to its insulation being defective.
Check right position and, if necessary,
adjust as indicated herein.
Restore electrical connection.
Replace faulty lead.
No gas.
Check gate opening.
Make sure that valve has changed
over to open position and that there
are no short circuits.
