Panasonic NE-1021A, NE-1021T, NE-1056T, NE-8051AR, NE-1056A User Manual
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Commercial Microwave Oven Error Codes
To allow for easier navigation throughout the tips and guidelines, the entire line of Panasonic commercial microwave ovens was divided into three categories. Listed below are these categories and their corresponding models.
OCS |
NE-8021AR, NE-8051AR, NE-1021A, NE-1051A, NE-1056A, NE-1021T, NE-1051T, |
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NE-1056T, NE-1024T, NE-1054T, NE-1064T |
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PRO-1 |
NE-1257A, NE-1258A, NE-1757A, NE-2157A, NE-1257R, NE-1258R, NE-1757R, |
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NE-2157R |
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PRO-2 |
NE-1780, NE-2680, NE-1780J, NE-2680J, NE-1780R, NE-2680R, NE-2180, NE-3280 |
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While troubleshooting an oven, identify the symptom as accurately as possible and refer to the following pages for tips and guidelines. Please note that causes and remedies were listed in logical order and probability of occurrence.
ERROR |
POSSIBLE CAUSE AND REMEDY |
GROUP |
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CODE |
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(SYMPTOM) |
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F01 + beep |
Temperature in the exhaust duct raised above 260 F due to |
OCS |
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a) |
Fire in the cavity |
PRO-1 |
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b) |
Clogged air filter (not applicable to OCS models) |
PRO-2 |
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c) |
Obstruction of the exhaust duct |
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d) |
Shorted temperature sensor |
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F03 or F04 |
Mismatch between the incoming line voltage and the voltage setting of the oven. |
PRO-1 |
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a) |
Make sure the line voltage corresponds with the setting of the oven. The |
PRO-2 |
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voltage selector is located at the back and consists of two plugs. The white |
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plug sets the oven for 208 V and black plug (or white plug with a black dot) |
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sets the oven for 230 V. |
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b) |
Make sure the line voltage is within +/- 10% tolerance. This is especially |
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important during summer months, where line voltage has tendency to drop. |
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c) |
If both steps above check OK, the error(s) may be caused by defective |
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controller (DPU) board |
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F05 |
Internal memory failure has occurred. Replace the controller (DPU) board |
PRO-1 |
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F09 |
Oven that was designed for 50Hz electricity is attempted to operate in the 60Hz |
PRO-1 |
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environment. If the model number of the oven in question is listed above, most likely |
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the controller (DPU) board has failed. |
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F33 or F34 |
These codes may be triggered by either excessive heat within the oven or poor |
OCS |
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grounding of either the temp sensor or the controller (DPU) board. Check the |
PRO-1 |
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following: |
PRO-2 |
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a) |
Clogged air filter (not applicable to OCS models) |
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b) |
Obstruction of the exhaust duct or insufficient ventilation |
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c) |
Defective thermal sensor (should read 30 – 70 kohm in room temperature) |
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d) |
Grounding of the thermal sensor (possible oxidation) |
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e) |
Poor connection (oxidation) at CN4 connector (PRO-1 models only) |
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f) |
Poor or no ground at the controller (DPU) board – ensure that all screws |
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securing the board are in place |
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g) |
Missing screw(s) that secure the escutcheon to the frame (OCS models |
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only) |
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h) |
If all steps above check OK, the error(s) may be caused by defective |
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controller (DPU) board |
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F44 |
This code will appear if there is malfunction of the keypad. Check: |
PRO-1 |
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a) |
Ribbon connector of the keypad for conductive residue or oxidation |
PRO-2 |
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b) |
Perform continuity test of the keypad (use matrix shown in the service |
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manual - DPU circuit diagram) |
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c) |
Replace the keypad, if both steps prove to be inconclusive |
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