User’s Manual
45
Check fan for blockage. Clean if necessary.
Check fan transformer primary voltage and ensure it is within tolerance
for the control voltage input for that module.
Replace fan.
If fan still doesn’t operate, the heatsink temperature switch may be faulty.
Contact Bonitron for return for repair.
5.3.6. STATUS CONTACT WON’T CLOSE
If the status contacts will not close, this indicates either a fault, or that the unit
is not enabled. Check the network I/O or the green Control Power LED to
determine the fault state of the system. Ensure the unit is enabled both at
the contact and over the network interface.
Loss of Control Power
Failure in control circuit
Over-temperature in module
Shorted IGBT (power transistor)
IOC fault
If the over-temperature contacts will not close, check the temperature of the
module see Section 5.3.7 for overheating troubleshooting. If the module is
hot, wait for the module to cool and see if it begins to function properly.
If shorted IGBT or IOC faults are reported and will not clear, the module has
a fault that needs to be repaired by Bonitron. Contact Bonitron for assistance.
If the module is cool and still will not operate, contact Bonitron for assistance
or repair.
5.3.7. MODULE OVER-TEMP, OR MODULE SEEMS TOO HOT
It is normal for this module to produce heat. Temperatures of 150°F are not
uncommon. If the modules fan is running, and the module is operating
properly, it is within normal tolerances.
Check the network interface to determine the heat sink temperature. If the
contacts are open, then the module is inhibited due to over-temperature. If
the fan is not running, see Section 5.3.5 above for assistance.
If the fan is running, check to make sure the airflow through and around the
module is unobstructed.
If the ambient temperature is high in the cabinet or installation area, the
module may overheat. Make sure the environment is within the operating
temperature requirements listed in the General Specifications (Table 2-6).
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