BMK 5000-6000 Boiler OPERATION-SERVICE-MAINTENANCE GUIDE
SECTION 7 – TROUBLESHOOTING GUIDE
Page
74
of
136
AERCO International, Inc.
•
100 Oritani Dr.
•
Blauvelt, NY 10913
OMM-0124_0A
05/03/2017
Ph.: 800-526-0288
GF-208
5.2 ADDITIONAL FAULTS WITHOUT SPECIFIC FAULT MESSAGES
Refer to Table 5-2 to troubleshoot faults which may occur without a specific fault message being displayed.
TABLE 5-2: BOILER TROUBLESHOOTING PROCEDURES WITH NO FAULT MESSAGE DISPLAYED
OBSERVED INCIDENT
PROBABLE CAUSES
CORRECTIVE ACTION
HARD LIGHT-OFF
1.
Clogged/damaged Gas Injector on
Igniter-Injector (Figure 5-1).
2.
Defective Staged Ignition Solenoid
(Figure 5-1).
3.
Pilot Regulator not calibrated
correctly.
1.
Disconnect the Staged Ignition Assembly solenoid from the Gas
injector Tube of the Igniter-Injector (Figure 8-1) and inspect Gas
Injector to ensure it is not clogged or damaged.
2.
Close the 2” Manual Shutoff Valve. Attempt to start the unit and listen
for a “clicking” sound that the Staged Ignition Solenoid makes during
Ignition Trial. If “clicking” sound is not heard after 2 or 3 attempts,
replace the Staged Ignition Solenoid.
3.
Refer to Section 4.5.2, above, and check the calibration of the Pilot
Regulator.
FLUCTUATING GAS
PRESSURE
1.
Gas pressure going into unit is
fluctuating.
2.
Damping Orifice not installed.
1.
Stabilize gas pressure going into unit. If necessary, troubleshoot
Building Supply Regulator.
2.
Check to ensure that the Damping Orifice is installed in the SSOV
Actuator shown in Figure 5-3. (For DBB Gas Trains, the Damping
Orifice is installed in the downstream SSOV Actuator).
Air/Fuel Valve “hunting” at
the 70% Valve Position
1.
IGST and Power Supply Boards in
C-More Controller are outdated.
1.
Check to ensure that the IGST and Power Supply Boards are Rev. E or
higher.
