Troubleshooting; Reading The Control; Failure Did Not Light - Beckett CG15 Manual

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Troubleshooting

Reading the Control

• Without Digital Display.
— The most common failure is flame signal absent; represented by two fast then two slow blinks, see Table 6 for
details. Refer to the control literature for all combination.
Table 6 — Two fast and two slow blinks (From the RM7895/RM7897 Manuals)
Fault Code System Failure
No-flame time present at
the end of the Pilot Flame
Code 2-2 Establishing Period; lost
*Flame Signal Absent* during the Main Flame
Establishing Period or
— Code 2-2 could represent either fault (28 or 19) on a control with a digital display.
• With Digital Display
— Fault Codes: If the control has a display it will give a more detailed error code, the two most common fault
codes are shown in Table 6 or Table 7 . Refer to the control literature for all combinations.
Table 7 — Fault Code 28 (From the 7800 SERIES Relay Module Fault Codes Literature)
Fault Code System Failure
Fault 28
Pilot Flame failure.
*Pilot Flame Fail*
Table 8 — Fault Code 19 (From the 7800 SERIES Relay Module Fault Codes Literature)
Fault Code
Fault 19
*Main Flame Ign.*
(This code means the burner
lit but failed shortly after.)

Failure Did Not Light

• Check Oxygen (O2) level in Low Fire
— If higher than 6% O2 close damper until O2 is between 3% and 5%.
— See "Adjusting the Damper" on page 27 for detailed instructions.
38 — Section: Troubleshooting
Recommended Troubleshooting
1. Measure the flame signal. If one exists, verify that it meets specifications.
2. Make sure that the flame amplifier and flame detector are compatible.
3. Inspect the main fuel valve(s) and valve connector(s).
4. Verify that the fuel pressure is sufficient to supply fuel to the combustion chamber.
Inspect the connections to the fuel pressure switches. Make sure they are
functioning properly.
5. Inspect the Airflow Switch and make sure that it is functioning properly.
6. Check the flame detector sighting position; reset and recycle. Measure the
flame signal strength. Verify that it meets specifications. If not, refer to the
during RUN.
flame detector and/or flame amplifier check-out procedures in the installation
instructions.
7 . Replace the flame amplifier and/or the flame detector, if necessary.
8. If the fault persists, replace the relay module.
Recommended Troubleshooting
1. Check pilot valve wiring and operation. Correct any errors.
2. Check fuel supply.
3. Check pilot pressure and repeat pilot turndown test.
4. Check ignition transformer electrode, flame detector, flame detector sighting and flame
amplifier.
5. If steps 1 through 4 are correct and the fault persists, replace the relay module.
System Failure Recommended Troubleshooting
1.
Flame was lost during 2.
MFEP or the first 10
seconds of the RUN state. 3.
Inspect the main fuel valve(s) and connections.
Make sure that the fuel pressure is high enough to supply fuel to the
combustion chamber.
Make sure the flame detector is positioned to obtain the required flame signal
strength; reset and recycle.
CG15, CG25, CG50 Burner Manual, Form No. 6104BCG50