Danfoss Turbocor TTS Series User Manual

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M-SV-001-EN Rev. G
4.27.2 Serial Driver Connections
The Serial Driver is connected to J8 of the Backplane. All components that communicate with the
Serial Driver are connected to the Backplane. Refer to "Figure 4-265 Backplane Connections" on page
208.
4.27.3 Serial Driver Verification
4.27.3.1 Serial Driver Input Voltage
1. Remove the Service Side Cover. Refer to "4.2.3.1 Service Side Cover Removal and Installation"
on page 58.
2. With main power on, using a multimeter set for DC voltage measurements, verify the voltage
on the Backplane +15V and +24V test points as defined in "Table 4-41 Backplane Test Points"
on page 209. Refer to "Figure 4-266 Backplane Test Points" on page 209 for the locations
of the test points. The results should be within the voltage range specified in "Table 4-43
Backplane Test Point Values" on page 211).
3. Isolate compressor power and wait for the Backplane LEDs to go out.
4. Unplug connectors J4 and J24 from the Backplane.
5. Using a multimeter set for resistance measurements, place the multimeter leads in the
Backplane +15V and +24V test points as defined in Section "4.26.2.1 LED Locations" on page
209”. The results should be greater than the resistance specified in "Table 4-43 Backplane Test
Point Values").
6. Install the Service Side Cover. Refer to "4.2.3.1 Service Side Cover Removal and Installation" on
page 58.
7. Return the compressor to normal operation.
4.27.3.2 Serial Driver Output Voltage Verification
1. Remove the Service Side Cover. Refer to "4.2.3.1 Service Side Cover Removal and Installation"
on page 58.
2. Isolate compressor power and wait for the Backplane LEDs to go out.
3. Wait a minimum of one (1) minute.
4. Reapply compressor power.
• The Alarm LED will illuminate green and the Cool-H, Cool-L and Run LEDs will illuminate
amber, all for about five (5) seconds. The Alarm LED will then switch to red and the others
will turn off.
• After the compressor completes start-up check, the Alarm LED will change to green
(provided no alarm is present) and the IGV LEDs will flicker until the IGV is reset. Additionally,
if an external expansion valve is connected to the I/O board, the LEDs on the I/O board will
flicker as the external expansion valve is reset.
5. Install the Service Side Cover. Refer to "4.2.3.1 Service Side Cover Removal and Installation" on
page 58.
4.27.4 Serial Driver Removal and Installation
4.27.4.1 Serial Driver Removal
1. Isolate compressor power.
2. Remove the Service Side Cover. Refer to "4.2.3.1 Service Side Cover Removal and Installation"
on page 58.
3. Verify that the LEDs on the Backplane have turned off.
4. Carefully disconnect the Serial Driver from the Backplane and slide it slowly away from the
compressor. Refer to "Figure 4-271 Serial Driver Removal" on page 214.

Danfoss Turbocor TTS Series Specifications

General

Brand	Danfoss
Model	Turbocor TTS Series
Category	Compressor
Language	English