|
| wiring back to the oven power relay. If voltage is |
|
| present, check for 24 VAC at the transformer |
|
| secondary. If there is primary voltage but no |
|
| secondary voltage, replace control transformer. |
| Conveyor motor | Check for 120 VAC supply to the conveyor motor |
|
| at wire #14 to neutral. If no voltage is present, |
|
| trace wiring back to the primary of the control |
|
| transformer. If voltage is present and the motor |
|
| will not run, check the motor windings for opens or |
|
| shorts. |
|
| WITH POWER OFF: Check the motor windings as |
|
| follows: |
|
| Grey to black - 38Ω approx. |
|
| Grey to blue - 38Ω approx. |
|
| Blue to black - 75Ω approx. |
|
| If any of the above fails, replace conveyor motor. |
| Capacitor, conveyor motor | Check for shorts or grounds. Replace capacitor as |
|
| needed. |
|
| WARNING: Capacitor has a stored charge, |
|
| discharge before testing. |
| Switch, conveyor reversing | Check continuity between switch terminals. |
|
| Replace switch as needed. |
| Oven control | If there is 120VAC supplied to the motor, and the |
|
| motor, capacitor, and reversing switch check |
|
| good, replace the oven control. |
Conveyor motor runs, but | NOTE: Display will indicate |
|
there is no speed display | “Belt Jam” |
|
| Oven control | Check for output voltage from oven control to hall |
|
| effect sensor (sensor is located in conveyor |
|
| motor). Measure voltage at the motor connector, |
|
| red wire and yellow wire. Voltage should be |
|
| approx. 10VDC. If no voltage is present, trace |
|
| wiring back to oven control. If there is no voltage |
|
| present at the oven control, replace the oven |
|
| control. |
| Conveyor motor | If there is voltage supplied to the hall effect |
|
| sensor, check for a frequency output from the hall |
|
| effect sensor. Measure frequency across the |
|
| yellow and white wires at the motor connector. |
|
| Frequency reading should be approx. 25 – 100 |
|
| Hz. If these readings are not achieved, replace |
|
| conveyor motor. If the readings are achieved, |
|
| proceed. |
| Oven control | If the hall effect sensor readings are correct, but |
|
| there is no speed indicated on the display, replace |
|
| the oven control. |
Impinger II – Advantage Digital Service Manual - Domestic | 11 |