Troubleshooting; Technical Service - Heath Zenith 121AC Manual

Chime does not sound:
• Check the Group Selection Switch: No tune will play when the Group Selection is in the "OFF"
position.
• Check Chime: Disconnect wire from terminal marked "TRANS". Have someone operate push button
at front door while you momentarily touch the "TRANS" wire to terminal marked "FRONT". You will
see a small spark if push button, wiring, and transformer are operating properly. Repeat the steps
for "REAR" terminal and rear push button. If wiring between transformer and push button(s) check
out properly, replace chime.
• Check Transformer: Test transformer voltage output with a volt meter. If a volt meter is not available,
momentarily touch the two low-voltage terminals with a screwdriver. You will see a small spark if
transformer is operating properly. If no spark is evident, replace transformer.
• Check Push Button(s): Remove suspected push button from door frame, disconnect wire from
terminals and touch bare wires together. If chime operates, push button is defective. Replace push
button.
Chime sounds but does not complete entire selected tune:
• Check Diode on Front Push Button: Verify diode is attached securely to push button (see page
7). Chime may not function properly if a diode is installed on more than one push button. Note:
Some push buttons have pre-installed diodes. An additional diode should not be added if the push
button has a pre-installed diode. If selected tune still does not sound completely, replace diode (Type
1N4003-200V-1A, available at local electrical component supplier).
Please call 1-800-858-8501 (english speaking only) for assistance before returning
If you experience a problem, follow this guide. You may also want to visit our Web site at:
www.hzsupport.com. If the problem persists, call* for assistance at 1-800-858-8501, 7:30
AM to 4:30 PM CST (M-F). You may also write* to:
HeathCo LLC
P.O. Box 90004, Bowling Green, KY 42102-9004
ATTN: Technical Service
* If contacting Technical Service, please have the following information available: Model
Number, Date of Purchase, and Place of Purchase.

TROuBleSHOOTING

TeCHNICAl SeRVICe

product to store.
No Service Parts Available for this Product
9 598-1142-03