Benchmark 6000 Boiler Installation, Operation & Maintenance Manual
CHAPTER 8 – TROUBLESHOOTING GUIDE
Page
116
of
210
AERCO International, Inc.
•
100 Oritani Dr.
•
Blauvelt, NY 10913
OMM-0086_0D
03/20/14
Ph.: 800-526-0288
GF-133
TABLE 8-1: BOILER TROUBLESHOOTING – Continued
FAULT INDICATION
PROBABLE CAUSES
CORRECTIVE ACTION
FLAME LOSS
DURING IGN
(continued)
6.
Pilot Scanner failed.
7.
Pilot View Port is blocked.
8.
Carbon or other debris on Burner.
9.
Pilot gas valve is closed.
10.
Pilot ignition solenoid valve does
not open.
11.
Clogged Pilot ignition piece.
6.
Check scanner Red LED. It should change from flashing to
steady when pointed at a small flame from a match or lighter.
7.
Remove ad clean Pilot View Port. Also, ensure that the hole
in the refractory is clear.
8.
Remove View-Port and inspect Burner with Boroscope. If it is
fouled or black with soot, remove the Burner and inspect for
any carbon build-up or debris. Clean and reinstall.
9.
Open the Pilot gas valve on the upstream side of the SSOV
(see Figure 8-1).
10.
When unit goes to ignition, listen for a clicking sound at the
Pilot ignition solenoid valve 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.
6.
Main Flame Detector is touching
burner mesh.
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 using procedures in Chapter 4.
4.
Remove the Burner and inspect for any carbon build-up or
debris. Clean and reinstall.
5.
Remove blockage in condensate drain.
6.
Straighten or replace Main Flame Detector.
HEAT DEMAND
FAILURE
1.
The Heat Demand Relays on the
Ignition/Stepper (IGST) 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.
HIGH EXHAUST
TEMPERATURE
1.
Poor combustion calibration.
2.
Carboned heat exchanger due to
incorrect combustion calibration
1.
Check combustion calibration using procedures in Chapter 4.
2.
If exhaust temperature is greater than 200
o
F, check
combustion calibration. Calibrate or repair as necessary.
