3.7 Working through the alarms
3.7.1 Using the controllers to check the system
In DEIF's experience, most controller commissioning problems are due to incorrect wiring and/or incorrect configuration (that
is, the setup of inputs, outputs and parameters in the controller). These errors cause commissioning problems and delays
while the commissioning engineer tries to find the problem.
Some wiring and/or configuration errors activate alarms. You can use the display unit or PICUS to see these alarms. For
each controller, work through the list, troubleshooting each alarm. Look at the list again when you get to the end, since new
alarms may have appeared.
CAUTION
Do not only rely on the controllers to check critical areas, for example, breakers and phase sequence. The alarm
might not be activated if there is more than one wiring or configuration error. A combination of errors could make it
look like there is no problem.
3.7.2 Testing the controller AC alarms
The system owner may want to test the controller's alternating current (AC) alarms. This is done by connecting test
equipment directly to the controller's AC measurement terminals. Refer to the test equipment supplier for information on how
to do this.
For each AC alarm test, you can use PICUS or the display unit to check whether the relevant alarm is activated in the
controller. You can also use PICUS or the display unit to view the alarm logs.
GPU 300 Commissioning guidelines 4189341033 UK
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