| Centrifugal Switch of Burner | Check for 24 VAC output from secondary of |
| Blower Motor | transformer. If voltage is present, check for 24 VAC |
|
| at pin 6 and ground on ignition control. If the burner |
|
| blower motor is running and there is no voltage at pin |
|
| 6 and the ground on the ignition control, replace the |
|
| burner blower motor. |
| Ignition Control | Check for 24 VAC supply to the ignition control at pin |
|
| 6 and the ground. If voltage is present, check for 24 |
|
| VAC across pin #3 and ground (pilot valve). NOTE: |
|
| The Honeywell ignition control has a 30 sec. pre- |
|
| purge (Time Delay) built in. If voltage is not present, |
|
| replace electronic control package. If the pilot valve |
|
| is energized, check to see that the high voltage |
|
| igniter circuit is also energized. To check, disconnect |
|
| the igniter lead from the ignition control. Place female |
|
| terminal of igniter lead approximately 1/8" from |
|
| terminal post on ignition control. Spark should jump |
|
| the 1/8" gap. If no spark is present, replace ignition |
|
| control. NOTE: control will try for ignition for 15 |
|
| seconds only. |
| No Pilot | If the ignition control is supplied with 24 VAC and the |
|
| pilot valve (internal to valve assembly) and igniter |
|
| circuits are energized, visually check for pilot flame. |
|
| This may be done by opening the small inspection |
|
| door on the end of the burner, or by opening the |
|
| main oven door and looking under the lower finger |
|
| housings on the right side of the oven. If no pilot |
|
| flame is visible, check pilot |
| Pilot | Check to see that pilot |
|
| valve is located between valve assembly and |
|
| burner). |
| Pilot Tube | Check for gas pressure at pilot tube. Disconnect pilot |
|
| tube at burner and connect manometer to pilot tube. |
|
| If no gas pressure is present, check for blockage in |
|
| pilot tube or pilot |
|
| and there is gas supplied to the oven, replace the |
|
| gas valve. |
| Pilot Orifice | If there is gas pressure at the pilot tube, check the |
|
| pilot orifice for obstructions. Replace as needed. |
| Burner Igniter | Check the burner igniter head for any obstructions, |
|
| also check for frayed or broken wire, (spark gap .100 |
|
| in. 2.5 mm). If there is visible damage, replace igniter |
|
| assembly. |
Pilot flame but no | Ignition Control | If there is a pilot flame, check for 24 VAC across |
main flame |
| terminals #1 and the ground (main valve). If there is |
|
| no voltage present, replace the ignition control. |
|
| NOTE: The Honeywell ignition control has a |
|
| lockout built in. If pilot flame is not proven, turn off |
|
| switch, wait 30 sec. and restart. If power is supplied |
|
| to terminal #1 but there is no main flame, verify that |
|
| the main valve (internal to valve assembly) has |
|
| opened. Connect a manometer to the manifold gas |
|
| pressure tap located on the back of the valve |
|
| assembly. If no gas is present, replace valve |
|
| assembly. Check for temperature control set above |
|
| 300°F. |
| Main Orifice | Check for blockage of main orifice. If there is no |
|
| blockage to the main orifice, check the temperature |
|
| control. |
| Temperature Control | Check for 120 VAC across L1 and L2 on temperature |
| (Electronic) | control board. |
12 | Impinger I – 1400 Series Advantage Service Manual - Dom & Int’l |