Danfoss Turbocor TT Series, Service Manual

Page: 216 / 294

Figure 4-242 Removing the Backplane
10. Remove the Backplane Frame from the compressor housing.
4.25.3.2 Backplane Installation
1. Align the Backplane with the mounting holes, ensuring the cavity temperature sensor connector is
available.
2. Insert and torque the fasteners at the top of the Backplane Frame to 3 Nm (27 in.lb.).
3. Insert and torque the Backplane Ground fastener at the bottom right of the Backplane to 3 Nm (27
in.lb.).
4. Install all connectors to their appropriate locations.
5. Remove the Inverter Ground fastener from top right of the Backplane.
6. Connect the Inverter ground ring to the Inverter Ground Screw and torque the fastener at top right of
the Backplane to 3 Nm (27 in.lb.).
7. Install the Bearing PWM Amplifier, BMCC, and Serial Driver.
8. Install the Service Side Cover. Refer to Section 4.1.3.1 Service Side Cover Removal and Installation on
page 54.
9. Return the compressor to normal operation.
4.25.3.3 Backplane Torque Specifications
Table 4-43 Backplane Torque Specifications
Description Nm Ft.Lb. In.Lb.
Backplane Mounting/Ground fastener, M5x10 3 - 27
Inverter Ground fastener, M5x25 3 - 27
PWM Mounting/heatsink fastener, M5x10 4.5 - 40
Cover fastener, M5x15 1.5 - 13
Page 216 of 294 - M-SV-001-EN Rev. H 1/23/2023