NuTone IM-440 Series installation instructions Installer’S Troubleshooting Guide, Continued

INSTALLER’S TROUBLESHOOTING GUIDE

TROUBLE	POSSIBLE CAUSE	POSSIBLE REMEDY
No radio, no intercom.	No electrical power.	Be certain 120VAC, 60Hz power has been provided to the primaries
(No Display).		of both 801T Transformers. No less than 16VAC should be
		measured on the secondary of either Transformer.
	Defective transformer.	Replace transformer.
No radio, intercom working.	Faulty Master Station.	Isolate Master Station from installation by removing ribbon cables
(AM/FM indicator on.)		from terminal board and 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 ribbon cables.
	Installation problem.	Check terminal board for shorted terminals or miswired cables.
		Remove one 6-wire cable at a time to locate faulty line. When radio
		comes on, check speaker connections and run continuity check of
		speaker wiring.
	Antenna problem.	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. In
		weak signal areas, an outside antenna may be necessary. Also see
		“Connecting the Radio Antenna”
Low or distorted radio	Incorrect volume setting.	Follow “Setting Program Audio Controls” instructions under
volume.		OPERATIONAL CHECKOUT.
Weak and distorted music,	Shorted or mis connected remote	This unit contains a protection device which opens if the audio
chime and intercom audio.	speaker wiring.	amplifier detects an overload condition. If the music, chime and
		intercom audio becomes weak and distorted, remove power from the
		master station for 10 minutes; this will reset the protective device. If
		the audio returns to normal, the remote speaker wiring and remote
		speakers should be checked for bare, shorted and/or mis-connected
		wires. The problem must be found and corrected before the master
		station will properly function.
Low or no intercom volume	Improper operation.	Be sure remote speaker set for MONITOR has its volume control set
from remote speaker in		between 1⁄2 and max, and receiving speakers have volume controls
MONITOR mode.		set between 1⁄2 and max. Follow “Setting Intercom Volume”
		instructions in OPERATIONAL CHECKOUT.
	Program and Intercom Volume	Follow these instructions whenever the radio tends to overpower
	Control adjustment.	transmissions from a remote speaker in the MONITOR mode. These
		instructions will help you get the proper balance between the radio
		and the monitored speaker.
		1. Set system volume control to midpoint.
		2. Set master to CD/TAPE or AUX position.
		3. Adjust volume control for each remote station and speaker in
		master station 3⁄4 position.
		4. Set master to AM or FM and tune to a strong AM or FM station.
		5. Adjust program volume control for a desired listening level.
		6. Increase Intercom volume control setting. Adjust clockwise to
		desired monitor volume.
		-Continued-

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