1/01 UDC3300 Limit Controller Product Manual 81
7.7 Troubleshooting Procedures, Continued
Procedure #4
Table 7-11 explains how to troubleshoot a Keyboard failure.
Table 7-11 Troubleshooting a Keyboard Failure
Step What to do How to do it
1
Make sure the keyboard is
connected properly to the
MCU/output and power/input
boards.
Withdraw the chassis from the case
and visually inspect the connection.
2
Controller Keyboard or specific keys
may be “LOCKED OUT” via the
security code.
Use your 4 digit security code number
to change the lockout level. Refer to
Section 3 – Configuration.
ATTENTION
Using “1000” as a
security code number will override the
4-digit code previously entered.
3
Run the keyboard test. Press the [SET UP] key and hold in,
then press the [FUNCTION] key at the
same time. The controller will run a
display test. Then you will see:
TRY ALL
Lower Display
KEYS
Upper Display
Press each key. If it works, the key
name will appear in the lower display.
4
Replace the display/keyboard if any
keys are shorted out.
Refer to “Replacement Procedures” in
this section.
Continued on next page
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