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M-SV-001-EN Rev.E
Compressor Components
3.14.3 Verification
• • • CAUTION • • •
When the BMCC is disconnected from the Backplane, it is important that the Inverter remain connected. Either the BMCC or
Inverter is required to be connected to the Backplane before applying power to the compressor.
3.14.3.1 BMCC Power
Supply Verification
3.14.3.2 BMCC
Communication
Verification
3.14.4.1 BMCC Removal
3.14.4.2 BMCC
Installation
1. Remove the Service Side Cover.
2. Measure the voltages at the +15V, -15V, and
+5V test points.
3. Isolate compressor power and wait for the
Backplane LEDs to go out.
4. Remove the BMCC from the Backplane.
5. Verify if the Inverter cable is connected to the
Backplane.
6. Turn ON the AC input power and measure the
voltages at the +15V, -15V, and +5V test points.
The measured voltages should be similar to those
measured when the BMCC is installed.
1. Using the SMT installed on your computer,
connect to the compressor using the Compressor
Connection Manager tool.
2. If the system is able to connect, the BMCC is
able to communicate with the user interface.
3. If the system is not able to connect, verify:
a. The BMCC is properly connected to the
Backplane.
b. The I/O cable connection between the
Backplane and the Compressor I/O Board is
properly attached.
c. The cable connection between the Compressor
I/O Board (RS485 or RS232) and the user interface
(user PC or chiller controller) is properly attached.
d. Inspect Backplane for indication of damage.
4. Cycle power and reattempt communication
with the compressor.
3.14.4 Removal and
Installation
1. Isolate compressor power.
2. Remove the Service Side Cover verifying the
LEDs on the Backplane have turned off.
3. Carefully, remove the Serial Driver.
4. Carefully, pull the BMCC straight out of the
Backplane connector.
1. Align the two lower insertion guides of the
BMCC so that they are on the inside of the two
upper insertion guides on the Bearing PWM
Amplifier. See Figure 70 (BMCC Insertion Guides).
2. Slide the BMCC straight into the connector
until firmly seated in the Backplane connector.
See Figure 70 (BMCC Insertion Guides).
• • • CAUTION • • •
When replacing the BMCC, a bearing calibration must be performed and saved to electrically erasable programmable read-only
memory (EEPROM). This may need to be done up to three times. The BMCC will then use the new values stored in EEPROM to
operate the compressor. Using default calibration data from a newly installed BMCC to operate a compressor could cause erratic
behavior.
Figure 70 - BMCC Insertion
Guides
Summary of Contents for Turbocor TT-300
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