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56PNEG-951
Network Failed I/O
This error is generated whenever Input/Output board (upper control panel) has lost its communications link
with the master (lower control panel door) and the fan/heater boards. Check the blue and yellow wires marked
N1-01 and N1-02 on a 3 terminal plug to make sure they are plugged in tightly. There are 3 LED lights next to
this plug, one indicates power and the other two indicate data being transmitted. These two labeled RXD and
TXD, should be flashing randomly back and forth indicating network activity.
Network Failed Mast
This error is generated whenever Master Display board (lower control panel) has lost its communications link
with the Input/Output board (upper control panel door) and the fan/heater boards. Check the blue and yellow
wires marked N1-01 and N1-02 on a 3 terminal plug to make sure they are plugged in tightly.