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M-SV-001-EN Rev.E
Compressor Components
3.9.4 Removal and
Installation
3.9.4.1 HV DC/DC
Converter Removal
1. Isolate the compressor power as described
in the “Electrical Isolation of the Compressor”
section of this manual.
2. Remove the Soft Start.
3. Unplug all connectors to the HV DC/DC
Converter.
4. Loosen the screws next to the Inverter.
5. Remove the screws located on front side of the
converter. See Figure 59 (HV DC/DC Converter
Removal).
6. Lift the HV DC/DC Converter by the front side
and slide it clear of the rear screws.
• • • CAUTION • • •
Do not lift the DC/DC by the transformer.
Figure 59 - HV DC/DC
Converter Removal
3.9.4.2 HV DC/DC
Converter Installation
1. Apply heat conductive paste to the underside
of the HV DC/DC Converter heat sink plate.
2. Slide the HV DC/DC Converter under the
screws pre-set in the Inverter plate.
3. Insert the front screws and tighten the eight
screws that secure the HV DC/DC Converter
to the Inverter plate. See Figure 59 (HV DC/DC
Converter Removal).
4. Plug in all connectors to the HV DC/DC
Converter.
5. Install the Soft Start.
3.10 Backplane
3.10.1 Function
The Backplane is powered by +24VDC (with
respect to 0V) from the HV DC-DC Converter. The
HV DC/DC Converter also provides the Backplane
with HV+ (+250VDC with respect to HV-) for the
Bearing PWM Amplifier. The Backplane connects
the onboard plug-in modules with the power
electronics, expansion valves, IGV stepper motor,
motor-cooling solenoids, bearing sensors, and
pressure/temperature sensors. It is a means to
transfer control, sensor, and error information
between the BMCC and other compressor
components.
The Backplane also serves as the source of power
to the parts connected to it. It features onboard,
low-voltage DC/DC converters for converting
+5V, +15V, -15V, and +17V from its input of
+24VDC. Note that the +5V, +15V, and 15V
are with respect to 0VDC, but the +17V is with
respect to HV-.
The Backplane is also equipped with status-
indicating light-emitting diodes (LEDs). All LEDs
are amber in color except for the alarm LED (D12)
which is green or red, depending on alarm status.
Содержание Turbocor TT-300
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