507867-02
Page 52 of 54
Issue 2128
Cleaning the Burner Assembly
1. Turn off gas and electrical power to the furnace.
Remove heating compartment access panel.
2. Disconnect the gas supply line from the gas valve.
3. Disconnect and label wires from gas valve.
4. Disconnect ignitor wiring at 2 circuit plug.
5. Disconnect and label wires from rollout switch.
6. Disconnect and label flame sensor wire.
7. Disconnect and label ground wire from burner/manifold
assembly.
8. Remove four screws that secures burner/manifold
assembly to vestibule. Remove the assembly and
make note not to allow ignitor plate to dislodge from
the assembly.
9. Gently clean the face of the burners using the soft
brush attachment on a vacuum cleaner. Visually
inspect the inside of the burners and crossovers for
any blockage caused by foreign matter. Remove any
blockage and inspect for damage. Replace if damage
by rust or foreign matter cannot be removed.
10. Reinstall the burner/manifold assembly using the
existing four screws. Burners are self aligning to
center of clam shells.
11. Reconnect ground wire.
12. Reconnect flame sensor wire.
13. Reconnect rollout switch wires.
14. Reconnect ignitor wires.
15. Reconnect gas valve wires.
16. Reconnect gas supply line to gas valve.
17. Refer to instructions on verifying gas and electrical
connections when re-establishing supplies.
18. Follow instructions to place furnace in operation. Run
furnace 5 minutes to ensure burners are clean and
operating correctly.
19. Replace heating compartment access panel.
Table 17. Control Diagnostic Codes
Integrated Control LED Codes
Red LED Flash Code
2
Diagnostic Codes / Status of Furnace
LED Off
No power to control or control hardware fault detected
Heartbeat
1
Normal operation - idle, continuous fan, cool
Continuous Rapid Flash Call for heat / burner operation
1 Flash
Reverse line voltage polarity
2 Flashes
Improper earth ground
3 Flashes
Burner failed to light, or lost flame during heat demand
4 Flashes
Low flame signal - check flame sensor
5 Flashes
Watchguard - burner failed to light, exceeded maximum number of retries or recycles
6 Flashes
Control detected igniter circuit failure. Not available on all controls.
7 Flashes
Primary or Secondary limit open or watchguard mode - limit switch open longer than 3 minutes
8 Flashes
Rollout switch open
9 Flashes
Pressure switch failed to close or opened during heat demand
10 Flashes
Watchguard - Pressure switch opened 5 times during one heat demand
11 Flashes
Pressure switch stuck closed prior to activation of combustion air inducer
12 Flashes
Flame sensed without gas valve energized
13 Flashes
Low line voltage
1
A “heartbeat” is indicated by a “slow flash” - 1 sec on 1 sec off, repeating
2
Error codes are indicated by a “rapid flash” - the LED flashes X times at 1/2 sec on, 1/2 sec off, remains off for 3 sec, then repeats
NOTE
: Last 10 error codes are stored in memory, including when power is shut off to the unit. To recall, press and release button.
Most recent will be displayed first, LED off for 3 sec, then next error code is displayed, etc. To clear error codes, depress and hold
button longer than 5 seconds.