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M-SV-001-EN Rev.E
Compressor Components
- Refer to the Application Manual for thermistor
specifications.
• Spare P: External pressure sensor input
- Refer to the Application Manual for pressure
sensor specifications.
- Refer to the OEM Programming Guide for
software implications.
D1 to D8 – EXV LED indicators: Red: 2 sets of 4
LEDs for EXV 1 & EXV 2.
D9 – Power LED: Green: ON: compressor is
on (i.e., Compressor I/O Board and BMCC are
properly connected to the Backplane).
1. Identify if the D9, green LED is on.
2. Remove the Service Side Cover.
3. Measure the Backplane +5V and +15V test
point voltages.
4. Remove all external connections to the I/O
board.
5. Measure the Backplane +5V and +15V test
point voltages.
6. Isolate compressor power and wait for the
Backplane LEDs to turn off.
7. Disconnect the compressor I/O cable from the
J6 connector on the CIM.
8. Apply power to the compressor.
9. Measure the Backplane +5V and +15V test
point voltages.
10. If voltages do not change, I/O board is not
draining energy.
1. Connect the CIM to a computer.
2. Confirm serial port to be used by the computer.
3. Open the SMT software and select the
Compressor Connection Manager tool. See the
Service Monitoring Tools User Manual for use
instructions.
4. Click Connect.
• If the Compressor Connection Manager is able to
connect to the compressor, the BMCC is able to
communicate with the user interface.
• If the system is not able to connect, verify:
- The D9, green LED is on.
- The cable connection between the Backplane
(port J7) and the CIM (port J6) is properly
attached.
- The cable connection between the CIM (at port
J1 if using RS485 communication or at port J7
if using RS232 communication) and the user’s
computer is properly attached.
- The BMCC is properly connected to the
Backplane.
5. If all connections are properly attached and
you still cannot connect to the compressor with
the SMT, confirm computer serial port, then use
the Search function in the Compressor Connection
Manager to determine the correct baud rate and
slave address of the compressor. Refer to the
Service Monitoring Tools User Manual for use
instructions.
6. If you can still not connect to the compressor,
verify the Backplane and the BMCC.
3.15.3 Verification
3.15.3.1 Determining
if Compressor Interface
Module is Draining
Energy
3.15.3.2 Compressor
Interface Module
Communication
Verification