Troubleshooting; Initial Troubleshooting - Trane Tracer MP503 Installation, Operation And Maintenance Manual

Troubleshooting

This section provides information about general troubleshooting steps to perform if there is a
problem with the operation of the equipment controlled by the MP503.
Important:
When encountering operational problems with the MP503, first perform the initial troubleshooting
in the following section,
After performing the initial troubleshooting steps, refer to the following sections for further
diagnosis:
•
•

Initial Troubleshooting

Always perform the initial troubleshooting steps listed in
area of trouble. Perform the steps in the order they are listed.
Table 13. Initial troubleshooting steps
Step Number Action
Look at the red Service LED. If it is flashing once per second, the module is not executing the
application software because the network connections and addressing have been removed.
Step 1 Refer to the section,
operation. For more details, refer to the Rover Operation and Programming Guide (EMTX-
SVX01).
Look at the green Status LED. It should be on continuously during normal operation. A blinking
Step 2 Status LED indicates abnormal behavior for the MP503. Refer to the section,
Indicators," p.
Use your meter (set to measure ac voltage) to measure the voltage across the ac power
terminals on the MP503 (with ac wires connected).
Step 3 If the voltage is approximately 24 V (20–30 V) on the terminals, the board is receiving
adequate input power. The MP503 circuit board has a problem.
If the voltage is approximately 0 V, proceed to the next step.
Disconnect the ac wires from the input power terminals. Use your meter (set to measure ac
Step 4 voltage) to measure the voltage across the ac wires.
If the voltage is still approximately 0 V, the board is not receiving the power it needs to run.
CNT-SVX09E-EN
Troubleshooting that involves accessing live electrical devices must be conducted
only by a properly trained and authorized electrician or trained technician.
"Initial
"Troubleshooting Binary Output (Relay Output)," p. 24
"Troubleshooting Universal Input," p. 25
"Status Indicators," p.
20.
Troubleshooting".
Table 13
20. Use the Rover service tool to restore normal
Troubleshooting
before moving on to the specific
Probable Cause
MP503 is not
configured
MP503 circuit board
"Status
problem
MP503 circuit board
problem
Input power problem
23