57
Read fl ue gas temperature on User
Interface.
Is temperature higher than 200°F ?
YES
NO
Boiler is over fi red. Wait
for boiler to cool. Fix
fl ow rate problem if any,
purging all air out of the
system.
Replace Flue Gas Sensor
Replace Control Module
Use thermal couple to measure fl ue
gas temperature through sampling
port. Is the measured temperature
and fl ue temperature reading on User
Interface signifi cantly different?
YES
NO
Blocking Error
Flue Gas Error
13 - TROUBLE SHOOTING
E
39