Diagnostic Tests; Resetting The Microprocessor; Troubleshooting Guide - NuTone IM-3204 Series Installation Instructions Manual

SYSTEM OPERATING CONTROLS

Diagnostic Tests

The following diagnostic tests have been incorporated into the
NuTone IM-3204 Radio Intercom to assist in troubleshooting.
1. Master station and remote station keyboard test.
2. Display test.
The following applies to both 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.
MASTER STATION AND REMOTE STATION KEYBOARD
TEST- Verifies that all keys at the master station and remote
stations are functioning properly.
To Activate: Press and HOLD
1. key
2. END CALL key
In this mode the LCD will display the following as each key is
pressed.
KEY
No key pressed
MASTER INSIDE/PATIO
MASTER DOOR TALK
MASTER END CALL
PROGRAM ON/OFF
PROGRAM SELECT
MEMORY RECALL
INSTALLER'S TROUBLESHOOTING GUIDE
TROUBLE
No radio, no intercom,
no display.
No radio, intercom working.
DISPLAY KEY
00d MEMORY SET
001
002
003 SCAN
004 REMOTE INSIDE PATIO
005 REMOTE DOOR TALK
006 REMOTE END CALL
POSSIBLE CAUSE
No electrical power.
Defective transformer.
Faulty Master Station.
Installation problem.
Antenna problem.
DISPLAY TEST- Displays all of the segments in the display.
To Activate: Press and HOLD
1. key
2. END CALL key

Resetting the Microprocessor

NOTE: Resetting the microprocessor will cause radio memory
channels to be lost.
Should the system not operate properly, the internal
microprocessor may require resetting. To reset the
microprocessor, use the point of a pen to press the reset button
through the access hole behind the right lower door under the
MEMORY SET key.
DISPLAY
007
008
009
010
10d
20d
30d
POSSIBLE REMEDY
Be sure there is 120 VAC, 60Hz power to the transformer's primary.
Next check for 16 VAC on the transformer's secondary.
Replace transformer.
Isolate Master Station from installation by removing IW-4UL cables from
Master Station. Wait one minute for timeout. With power on, radio
should be playing at Master. If no radio, Master is probably faulty. If radio
plays, reconnect IW-4UL cables one at a time from the remote stations.
Check screw terminals on Master Station for shorted wires or miswired
cables. Remove one 4-wire cable at a time to locate faulty line. When
radio comes on, check speaker connections and run continuity check
of speaker wiring.
Check for shorted antenna connection. Remove antenna connector
from tuner board and touch each pin with metallic object. If radio plays,
antenna is not functioning; be sure it is installed properly.
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