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Procedure: Select the LOCK DATABASE function (at the end of the “Configuration Mode Main
Menu”) to lock out 920 Operator Console configuration modification access. The display will
confirm the operation by displaying a “
DATABASE LOCKED” message.
Note: 920 Operator Console configuration modification access will automatically re-lock after
approximately 5 minutes of keypad inactivity.
3.10.3 UNLOCK DATABASE
Purpose: If a
PASSCODE has been enabled (PASSCODE is not set to 0) and the user wants to mod-
ify any of the controller’s configuration parameters using a 920 Operator Console, the database
must first be unlocked.
Procedure: Try modifying any configuration parameter, or select the
UNLOCK DATABASE function
(at the end of the “Configuration Mode Main Menu” for V3.11 and up), and a prompt for the
PASSCODE will appear. If the correct PASSCODE is entered, the display will confirm the operation
by displaying a
DATABASE UNLOCKED message.
3.10.4 TEST TRACING
Purpose: The
TEST TRACING feature provides an easy method of temporarily overriding the tem-
perature control, without having to modify the
CONTROL SETPOINT temperature or any other con-
figuration parameter.
Procedure: Select the
TEST TRACING function to force the output switch on for approximately 30
seconds. After the test time has expired, the unit will automatically revert to normal operation.
Notes:
• This feature only overrides temperature control; it does not override other control parameters
such as power limiting.
• This feature is inhibited if the point is in load-shedding mode.
3.10.5 DISPLAY TEST (V3.11 AND UP)
Purpose: The
DISPLAY TEST feature provides an easy method of illuminating each display seg-
ment and all the
LEDs of the 920 Operator Console to ensure that they are functioning properly.
Procedure: Select the DISPLAY TEST and watch the 920 console to verify that each display seg-
ment and each LED is illuminated during the test sequence.
Note: Pressing any key on the 920 Operator Console keypad during the DISPLAY TEST causes the
DISPLAY TEST to abort.
3.11 Copy Configuration Functions (V3.11 and up)
The following functions provide a quick method of setting all of the controller’s configuration
parameters to a predefined state.
3.11.1 COPY DEFAULTS TO COMMON (V3.11 AND UP)
Purpose: Loads Tyco Thermal Controls’ default configuration parameters that are common to
both Point A and Point B as defined in Appendix F.
Procedure: Enter the “Copy Configuration Sub-Menu” and select
DEFAULTS TO COMMON.
Notes:
• This function overwrites the communication configuration parameters, which could affect
existing communications to the controller.
• This function causes the
OVERRIDE SOURCE for each point to be set to REMOTE. This is
because the
EXTERNAL INPUT setting is set to NOT USED.
3.11.2 COPY DEFAULTS TO POINT A (V3.11 AND UP)
Purpose: Loads the point-specific Tyco Thermal Controls default configuration parameters, as
defined in Appendix F, for Point A. As well, all of Point A’s maintenance data are reset. All load-
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