AERCO BMK 1.5 LN Dual Fuel June 2010 - Manual (Page 67)

TROUBLESHOOTING
TABLE 8-1. BOILER TROUBLESHOOTING – Continued
FAULT INDICATION PROBABLE CAUSES CORRECTIVE ACTION
(continued) 7. Carbon or other debris on burner.
8. Defective differential pressure
regulator.
9. Staged Ignition ball valve is closed.
10. Staged ignition solenoid valve
doesn’t open.
11 Clogged staged ignition piece.
7. Remove the burner and inspect for any carbon or debris.
Clean and reinstall
8. Using a gauge or manometer, check gas pressure readings
into and out of the Air/Fuel Valve to ensure gas is getting to the
burner.
9. Check position of Staged ignition ball valve on gas train. See
Figure 8-1 at end of this Chapter.
10. When boiler goes to ignition, listen to the solenoid valve for a
clicking sound to ensure it is opening.
11. Remove and inspect staged ignition piece for blockage.
FLAME LOSS
DURING RUN
1. Worn Flame Detector or cracked
ceramic.
2. Defective Regulator.
3. Poor combustion calibration.
4. Debris on burner.
5. Blocked condensate drain.
1. Remove and inspect the Flame Detector for signs of wear or
cracked ceramic. Replace if necessary.
2. Check gas pressure readings using a gauge or manometer
into and out of the Air/Fuel Valve to ensure that the gas
pressure into and out of the valve is correct.
3. Check combustion calibration. Adjust as necessary.
4. Remove the burner and inspect for any carbon or debris.
Clean and reinstall.
5. Remove blockage in condensate drain.
HEAT DEMAND
FAILURE
1. The Heat Demand Relays on the
Ignition/Stepper board failed to
activate when commanded
2. Relay is activated when not in
Demand
1. Press CLEAR button and restart the unit. If the fault persists,
replace Ignition/Stepper (IGST) Board.
2. Defective relay. Replace IGST Board.
8-5