Technical data

Chapter 8: Troubleshooting

SP40S Multi-Function Facility Communication System Manual, Revision L

8.2.10 Procedure J

If the green PWR LED is “ON,” the yellow SYSTEM TROUBLE LED is “ON,” and D44 AUX

IN LED is “ON,” an open condition exists on the CC/NAC input circuit. An AUX IN trouble

condition might be caused by:

 A Remote Microphone or RMX trouble being reported to the SP40S panel (if a remote

MIC or RMX is connected).

 Faulty wiring is causing an open on the CC/NAC input circuit (TB6).

 Jumper JP2 being removed and missing a UL Listed 10K Ohm, ½ W EOLR on the

CC/NAC circuit (TB6) (if a remote MIC is not connected).

Perform the following:

1. Check the Remote Microphone and/or RMX wiring for an open condition.

2. Check the jumper setting (JP4) if a Remote Microphone or RMX is not connected to

the SP40S panel.

3. If the Remote Microphone or RMX is in a trouble condition, refer to that installation

manual to troubleshoot that particular product.

8.2.11 Procedure K

If the green PWR LED is “ON,” the yellow SYSTEM TROUBLE LED is “ON,” and D2,

AUDIO SHORT LED is “ON,” a short condition exists on the AUDIO OUT circuit. An AUDIO

SHORT trouble condition might be caused by:

 Shorted speaker appliance on AUDIO OUT (TB4).

 Faulty wiring between AUDIO OUT and Speaker Notification Appliance Circuit is

causing a short.

 A trouble being reported from an Audio Splitter or Audio Booster.

Perform the following:

 Check the wiring and Audio Notification Appliances for a short circuit condition.

 If a Splitter or Audio Booster is in a trouble condition, refer to that manual to

troubleshoot that particular product.

8.2.12 Procedure L

If the green PWR LED is “ON,” the yellow SYSTEM TROUBLE LED is “ON,” and D1 AUDIO

OPEN LED is “ON,” an open condition exists on the STB OUT NAC output circuit. A STB

OPEN trouble condition might be caused by:

 Missing UL Listed 10K OHM, ½ W EOLR on the AUDIO OUT circuit (TB4).

 Faulty wiring is causing an open on the speaker notification appliance circuit.

Perform the following:

1. Check for proper EOLR.

2. Check the speaker notification appliance circuit wiring for an open condition.