CTI Products IIB Console Interface - Manual (Page 26)

IIB Hardware Reference Troubleshooting
CTI Products, Inc.
68-10844-115
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10. Troubleshooting
This table is a list of troubleshooting tips specific to the IIB module. For
additional troubleshooting tips, refer to the troubleshooting section found in the
Monitoring and Control Network System Manual, reference 1.
Due to the high percentage of surface-mount components the IIB is treated as a
field replaceable unit. If any system problems are the result of a malfunctioning
IIB unit, the entire unit must be replaced and returned for repair.
PROBLEM CAUSE
ERR LED is ON Verify that the module’s Group and Module numbers are valid.
Reprogram the unit address of the Comparator I/O Module that the IIB is
connected to. Also, verify that this is a valid unit address. Refer to section
6.1 for a description of this procedure.
Verify that option switch 4 is in the DOWN position.
Receiver 8 is not
working properly Verify that the Link Fail Enable pin (J1, pin 4) is not tied to ground when the
module is reset.
Link Failure
Reporting is not
working properly Verify that the Link Fail Enable pin (J1, pin 4) is tied to ground when the
module is reset.
If comparator link failures are not being reported, verify that the Comparator
I/O Module supports the Link Fail reporting feature.
Link Fail Enable
(J1 pin 4) is
grounded and the
Link Fail output
(J1 pin 30) is
active. Verify that the network cable between the IIB and the Comparator I/O
module is properly connected and that both modules are communicating
(their ACT LEDs are on).
Verify that the cable between the Comparator I/O Module and the
comparator is properly installed and that the Comparator I/O Module is
communicating with the comparator (refer to the troubleshooting section of
the Comparator I/O Module).