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Brittney DudleyJul 31, 2025
What to do if the binary output is not turning on the equipment wired to it in Trane Tracer MP503 Control Unit?
- CChelsey PadillaJul 31, 2025
First, perform the initial troubleshooting steps as described in Table 13 on page 32 to verify that general board operation is okay. If the LED is on, the Tracer MP503 is energizing its output relay. Then, use your meter to measure the voltage across the binary output terminals. If the voltage is approximately 24 V, the issue is not with the Tracer MP503. Inspect the wiring to ensure there's a solid connection between the wire and the terminal blocks, and check for any shorts or opens, especially at wire splices. Remove the wires from the binary output terminals and measure the voltage again. If the voltage is 24 V, the wiring or equipment problem is external to the Tracer MP503.
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