Cabinet Troubleshooting
The master control display and the row displays show error messages when there is a problem. The messages are shown in the matrix below along with possible causes and diagnostic tests.
Error Message |
| Cause |
| Tests |
|
|
| The master control board has lost |
| • Turn the cabinet off and back on. |
|
Call service row display | communication with the specified |
| • Ensure there are no software |
| |
error | board. |
| incompatibilities. |
| |
Row number also displayed * |
|
| • Inspect ribbon cable connections. |
| |
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|
| The master control board has lost |
| • A display connection can produce |
|
Call service distribution | communication with the top |
| this display. Before replacing a |
| |
board 0 error* | distribution board. |
| distribution board, remove power |
| |
|
|
|
| from the unit and disconnect the |
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|
|
|
| displays from the affected |
|
|
| The master control board has lost |
| distribution board. Return power |
|
|
| communication with the bottom |
| to the unit and, one at a time, plug |
|
Call service distribution | distribution board. |
| in the displays, cycling power each |
| |
board 1 error* |
|
| time. If the problem is display‐ |
| |
|
|
|
| related it will go away with the |
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| affected display disconnected. |
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|
| • Turn the cabinet off and on, which |
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|
|
| can clear the problem if it is |
|
|
| Row’s top plate failed to reach |
| software related. |
|
Call service rate of |
| • Check top plate RTD output against |
| ||
required temperature in prescribed |
| chart on page 2‐4. |
| ||
rise top** |
|
| |||
time window after startup or when |
| • Enter service code (see page 2‐1) |
| ||
|
|
|
| ||
|
| switching between menus. |
| and switch top plate on and off to |
|
|
|
|
| ensure it is responding to cabinet |
|
|
|
|
| circuits. |
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|
| • Turn the cabinet off and on, which |
|
|
|
|
| can clear the problem if it is |
|
|
| Row’s bottom plate failed to reach |
| software related. |
|
|
|
| • Check bottom plate RTD output |
| |
Call service rate of | required temperature in prescribed |
| against chart on page 2‐4. |
| |
rise bot ** | time window after startup or when |
| • Enter service code (see page 2‐1) |
| |
|
| switching between menus. |
| and switch bottom plate on and off |
|
|
|
|
| to ensure it is responding to |
|
|
|
|
| cabinet circuits. |
|
|
|
|
|
| |
Call service top row temp |
|
| • Compare plate temperature to |
| |
too high ** |
|
| displayed temperature. |
| |
Call service bot row temp |
|
| • Compare plate RTD resistance to |
| |
too high** |
|
| chart on page 2‐4. |
| |
Call service top row temp |
|
| • Switch plate on/off with service |
| |
|
| code to ensure it is responding to |
| ||
too cool** |
|
|
| ||
|
| cabinet circuits. |
| ||
Call service bot row temp | RTD sensor is producing a reading |
|
| ||
| • With plate on and calling for heat, |
| |||
too cool ** | that is out of range. The problem can |
|
| ||
| check amp draw on leads between |
| |||
Call service top sensor | be a failed RTD, heater or |
|
| ||
| distribution board and heater |
| |||
error hi temp** | distribution board. |
|
| ||
| plate. Amp draw on a properly |
| |||
Call service bot sensor |
|
|
| ||
|
| functioning plate should be 1.67. |
| ||
error hi temp** |
|
|
| ||
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|
| ||
Call service top sensor |
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|
| |
error low temp ** |
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|
| |
Call service bot sensor |
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|
| |
error low temp** |
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| |
* Shown on master control display. ** Shown on affected row display.
