OPERATIONAL CHECKOUT
Diagnostic Tests
The following diagnostic test have been incorporated into the NuTone
1.Master station keyboard test
2.Control line voltage test
3.Display test
The following applies to all three diagnostic tests:
1.To access any of the diagnostic tests, the system must be in the quiescent state (radio off and intercom in the standby mode).
2.Pressing the MEMORY SET key will end the current diagnostic test.
3.The current diagnostic test will end after one minute of inactivity.
NOTE: An incorrect control line voltage caused by miswiring
or a defective remote station may prevent the unit from entering the diagnostic mode. This condition, however, can
be circumvented by first placing all station selector switches into the OFF mode and then disconnecting CN701 from the terminal board. The voltage on the control line can then be measured by activating the control line voltage test mode and then reconnecting CN701.
1.MASTER STATION’S KEYBOARD TEST – Verifies that all keys on the master station are functioning properly. To Activate: Press and HOLD
1.▲ key
2.▼ key
3.MEMORY 1 key.
In this mode the hours in the display represent the current diagnostic test and the minutes indicate the current key being pressed. The following will be displayed as each key is pressed.
KEY | DISPLAY |
No key pressed | 1:00 |
SCAN | 1:01 |
▲ | 1:02 |
▼ | 1:03 |
PROGRAM OFF | 1:04 |
AM | 1:05 |
FM | 1:06 |
CD/TAPE | 1:07 |
AUX | 1:08 |
TIMER | 1:09 |
INSIDE/PATIO | 1:10 |
DOOR TALK | 1:11 |
END CALL | 1:12 |
MEMORY 1 | 1:13 |
MEMORY 2 | 1:14 |
MEMORY3 | 1:15 |
MEMORY 4 | 1:16 |
MEMORY 5 | 1:17 |
MEMORY 6 | 1:18 |
TIME SET | 1:19 |
HOUR | 1:20 |
MIN | 1:21 |
MEMORY SET | 1:22 |
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2.CONTROL LINE VOLTAGE TEST – Displays the voltage on the control line.
To activate: Press and HOLD
1.▲ key
2.▼ key
3.MEMORY 2 key.
Example:
| VOLTAGE ON |
DISPLAY | CONTROL LINE |
2:34 | 3.4 volts |
2:17 | 1.7 volts |
2:06 | .6 volts |
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In this mode, the hours represent the diagnostic test, and the minutes indicate the voltage on the control line.
| VOLTAGE WINDOW | ||
MODE | MAX |
| MIN |
End Call | 4.5V | - | 2.4V |
Door Talk | 2.4V | - 1V | |
Inside/Patio | 1.0V | - | 0 |
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The control line voltage windows for the three intercom modes are listed above. For proper intercom operation, the control voltage produced when an intercom key is pressed at a remote station should fall between the voltages indicated.
NOTE: Pressing END CALL, DOOR TALK or INSIDE/PATIO keys at the master station will not change the voltage on the control line.
If a remote station does not produce a voltage within the above windows for a specific intercom function, check the following:
•Make sure all connectors from the master station are properly installed into the terminal PC board.
•Check
•Confirm that the suspect remote speaker station functions properly by replacing it with a known good Remote Station.
3.DISPLAY TEST – Displays all of the segments in the display. To Activate: Press and HOLD
1.▲ key
2.▼ key
3.MEMORY 3 key
Pressing the ▲ key toggles the display on and off.
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