CTI Products GPIO General Purpose I/O Interface - Manual (Page 24)

GPIO Hardware Reference Troubleshooting
CTI Products, Inc.
8. Troubleshooting
This table is a list of troubleshooting tips specific to the GPIO module. For
additional troubleshooting tips, refer to the troubleshooting section found in the
Monitoring and Control Network System Manual S2-60425.
Due to the high percentage of surface-mount components, the GPIO is treated as a
field replaceable unit. If any system problems are the result of a malfunctioning
GPIO module, the entire unit must be replaced and returned for repair.
PROBLEM CAUSE
The PWR LED flashes The input DC voltage is low. There may be
too many modules in line. There is a voltage
drop in each module and the downstream
modules will each see a lower DC voltage.
The ERR LED flashes once The Group & Module switches are set to FF:F.
This is an invalid address. Set the Group &
Module switches to the proper address for
your system and press the Reset switch down.
The ERR LED is on
continuously Internal hardware or firmware error.
Call the factory for an RMA.
Input LEDs are stuck on An input may be stuck active. Remove the
50-pin I/O connector. If the input LED goes
off, the problem is external to the GPIO.
If the input LED remains stuck on, there is an
internal problem in the unit. Call the factory
for an RMA.
Output LEDs for Magnetically-
Latched relays come up in a
random state on initial power-
up The Magnetically-Latched relays may have
been jarred during transport.
Initialize the relays as described in section
5.2.1, Initializing the Relays above.
If this problem persists and is not due to
mechanical shock on the relays, it indicates an
internal problem. Call the factory for an
RMA.
68-12068-100 24