IS 592 ECN 3855
Page 11 of 13
Pilot will not light
Pilot will not remain lit
FAULT FINDING
CHECK IGNITER FOR SPARKING
CHECK GAS
SUPPLY IS ON
CONNECT TO
CORRECT GAS TYPE
YES
YES
NO
CHECK IGNITER LEAD
CONNECTIONS
IS GAS TYPE CORRECT
ADJUST AS
NECESSARY
CHECK PILOT INJECTOR FOR
BLOCKAGE
CLEAR BLOCKAGE /
REPLACE INJECTOR
NO
CHECK OPERATING
PRESSURE
CHECK GAS FLOW TO
PILOT
PURGE SYSTEM
CHECK MILLIVOLT OUTPUT OF
THERMOCOUPLE
REPLACE
THERMOCOUPLE
<4mV
>4mV
REPLACE THERMOSTAT