Cooper Wheelock SAFEPATH SPB-160, Installation, Testing, Operation And Maintenance Manual

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Chapter 8: Troubleshooting
Series SPB Audio Boosters Manual, Revision A
8-7
8.2.6 Procedure F
If the green AC LED is “ON,” the yellow TROUBLE LED is “ON,” D78 EXP SHORT LED is
“ON,” the supervision circuit is unable to read the 1/2W EOLR. This can be caused by:
Expansion circuit is shortened.
Perform the following:
Check the wiring to EXP OUT and ensure there is no short.
8.2.7 Procedure G
If the green AC LED is “ON,” the yellow TROUBLE LED is “ON,” and D87 EXP OPEN LED is
“ON,” the supervision circuit is unable to read the 1/2W EOLR: This can be caused by:
Missing or Improper 1/2W EOLR.
Open or loose wiring on the EXP OUT terminals.
Open EXP OUT appliance circuit.
Perform the following:
1. Check that 1/2W EOLR is in place and is UL Listed 10K Ohm, 1/2W resistor.
2. Check the wiring to EXP OUT terminals and ensure there is no open circuit.
3. Troubleshoot the expansion circuit for incorrect wiring.
8.2.8 Procedure H
If the green AC LED is “ON,” the yellow TROUBLE LED is “ON,” and D100, GF LED is
“ON,” a ground fault condition exists on the output wiring. A GF trouble condition might be
caused by:
Appliance wiring touching conduit.
Improper Installation of an appliance(s).
Perform the following:
1. Disconnect appliances from the strobe and speaker connection on the motherboard.
2. Troubleshoot NAC circuits by checking for a resistance reading other than infinity
between the appliance leads and the conduit.
8.2.9 Procedure I
If the green AC LED is “ON,” the yellow TROUBLE LED is “ON,” and D25 AUD1 SHORT
LED is “ON,” the supervision circuit is unable to read the 1/2W EOLR: This can be caused by:
Audio appliance connected is shorted.
Shorted connection on the AUD1 OUT circuit.
Circuit installed improperly.
Perform the following: