Troubleshooting; Initial Troubleshooting - Trane Tracer MP501 Installation, Operation And Maintenance Manual

Troubleshooting

This section outlines some general troubleshooting steps that should be performed if there is a
problem with the operation of the equipment controlled by the MP501.
If encountering operational problems with the MP501, first, perform initial troubleshooting steps
described in the next section,
After performing the initial troubleshooting steps, refer to the following specific sections to further
diagnose the following operational problems:
•
•
•

Initial Troubleshooting

Always perform the initial troubleshooting steps listed in
area of trouble. Perform the steps in the order they are listed.
Table 17. Initial troubleshooting steps
Step Number Action
Look at the red Service LED. If it is flashing once per second, the controller is not executing
Step 1 the application software because the network connections and addressing have been removed.
Refer to the section,
Look at the green Status LED. It should be on continuously during normal operation. A blinking
Step 2 Status LED indicates the MP501 is performing a manual output test. Refer to the section,
"Status Indicators for Operation and Communication," p.
Take your meter (set to measure ac voltage) and measure the voltage across the ac-power
terminals on the MP501 (with ac wires connected). If there is approximately 24 V (21–27 V)
Step 3
on those terminals, the board is receiving adequate input power and you likely have a MP501
circuit board problem.
Disconnect the ac wires from the input power terminals. Take your meter (set to measure ac
Step 4 voltage) and measure the voltage across the ac wires. If you see approximately 0 V, the board
is not receiving the power it needs to run.
Reconnect the ac wires to the input power terminals. Perform the manual output test (refer to
the section,
Step 5
If the outputs on the controller do not behave as described in
problem with the MP501 circuit board.
CNT-SVX08F-EN
If binary output 3 is not turning on the equipment wired to it, refer to the section,
3 (Relay Output) Troubleshooting," p.
If the analog output is not opening the end device, refer to the section,
Vdc) Troubleshooting," p.
If binary outputs 1 and 2 are always off, refer to the
Troubleshooting," p. 51.
"Status Indicators for Operation and Communication," p.
"Manual Output Test," p. 43).
"Initial Troubleshooting".
48.
48.
43.
Table 12, p.
Troubleshooting
"Analog Output (0–10
section,"Binary Output 1 and 2
Table 17 before moving on to the specific
Probable Cause
MP501 is not
configured.
43.
MP501 is in manual
output test mode.
MP501 circuit board
problem.
Input power problem
MP501 circuit board
problem.
44, then there is a
"Binary Output
47