Honeywell UDC 3300 manual explains how to troubleshoot a Keyboard failure, Procedure #7

Procedure #7 Table 9-14 explains how to troubleshoot a Keyboard failure.

Table 9-14 Troubleshooting a Keyboard Failure

Step

1

What to do	How to do it
Make sure the keyboard is	Withdraw the chassis from the case
connected properly to the	and visually inspect the connection.
MCU/output and power/input
boards.

2

Controller Keyboard or specific keys may be LOCKED OUT via the security code.

Use your four-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

4

Run the keyboard test.

Replace the display/keyboard if any keys are shorted out.

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:

Upper Display

KEYS

Lower Display

TRY ALL

Press each key. If it works, the key name will appear in the lower display.

Refer to “Parts Replacement

Procedures” in this section.

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