Carrier RTU-MP, Руководство по интеграции

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Troubleshooting
20 RTU-MP Controller
The RTU-MP controller acts as an intelligent embedded thermostat to the rooftop unit, but can be monitored
and controlled from a third party network. For this reason, there are 3 distinct components for
troubleshooting.
The three parts to the system are:
•
The mechanical systems of the rooftop unit
•
The RTU-MP controller
•
The third party network connected
Determining which component needs troubleshooting is the first step.
The RTU-MP controller can be used to troubleshoot itself with service test, communicating LED’s, and built-in
alarms, which are discussed in the unit Controls and Troubleshooting instructions. Disconnecting the RTU-MP
from the unit control inputs can be valuable in determining whether the problem is related to the
unit/equipment, the controller/equipment, or the controller/network. Generally, this should be the first step
in troubleshooting operational problems. When disconnected from the unit control inputs, simple 24V signals
can be used to activate the units G, Y1, Y2, W1, W2, etc. and verify proper unit operation. If the problem
occurs without the RTU-MP connected, then the operator should begin troubleshooting the unit/equipment
rather than the RTU-MP or network.
Third party network may also help in troubleshooting the controller and rooftop unit. Third party network
troubleshooting may also be required.
LED's
The LED’s indicate if the controller is speaking to the other devices on the network. The LED’s should reflect
communication traffic based on the baud rate set. The higher the baud rate, the more solid the LED’s will
appear.
The LED's on the RTU-MP show the status of certain functions.
If this LED is on... Status is...
The RTU-MP has power Power
The RTU-MP is receiving data from the network segment
Rx
The RTU-MP is transmitting data over the network segment Tx
The binary output is active BO#
NOTE If Tx is not lit, the MS/TP token is not being passed between controllers.
The Run and Error LED's indicate controller and network status.
If Run LED shows... And Error LED shows... Status is..
2 flashes per second Off Normal
2 flashes per second 2 flashes,
alternating with
Run
Five minute auto-restart delay after
system error
LED
2 flashes per second 3 flashes, then off Controller has just been formatted
2 flashes per second On Two or more devices on this network
have the same network address
2 flashes per second On Firmware halted after frequent system
errors or control programs halted
Troubleshooting