Section 5 — Service and Maintenance
5-6 Part No. 750-363
5.4 TROUBLESHOOTING
Lockout Conditions
1. Observe lockout code and description - refer to Falcon appendix if necessary.
2. After determining lockout condition, investigate possible causes.
3. When cause is diagnosed, remedy condition.
4. Reset control. Boiler should be able to start normally.
5. If lockout recurs, further investigation is required. Repeat steps 1 through 4 as needed. If necessary, contact your
CB service representative for technical support.
EXAMPLE: Lockout 79 Outlet Temperature High Limit
1. Before resetting control to clear lockout, check for sufficient water flow through boiler. Possible sources of insuffi-
cient flow include closed water valves, insufficient pump speed, air trapped in boiler (inadequate air venting), or
modulation set point and off point close to outlet high limit setting.
The Falcon system display/interface provides extensive boiler diagnostic data at the time of lockout that
can help in determining the source of a problem. This information is accessed through the Lockout History.
2. Remedy condition that caused lockout to occur.
3. Reset control by pressing <Clear Lockout> from the Lockout History screen.
Light-off Problems
Check electrode positioning according to Section 5.3 above.
The dimensions on the ignition electrodes are not easily adjustable - bending the rods can cause damage
to the insulation material. In addition, a bent electrode will return to its original shape when heated. If an
ignitor is out of specification, replacement is generally required. Clean or replace as necessary.
Also see Troubleshooting Chart below.
Figure 5-3
ENSURE GAS HOLES
ARE POINTED OUTWARD
SCANNER HOLESIGHT PORT
HOLE
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