Danfoss Turbocor TTS Series User Manual

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M-SV-001-EN Rev. G
5.5.2 Determining the Cause of an Energy Drain
5.5.2.1 Determining if Serial Driver is Draining Energy
1. Remove the Service Side Cover.
2. Test the Backplane voltages at the +24V, +15, +5, and -15 VDC test points.
• If all voltages are within +/- 10%, the Serial Driver is not draining energy.
• If any of these voltages are not within +/- 10%), proceed to Step 3.
3. Isolate the compressor power and wait for the LEDs on the Backplane to turn off.
4. Remove the Serial Driver.
5. Re-apply the compressor power
6. Test the Backplane voltages at the +24V, +15, +5, and -15 VDC test points.
• If all voltages are within +/- 10%, the Serial Driver is draining energy.
• If any of these voltages are not within +/- 10%, another component is draining energy.
5.5.2.2 Determining if BMCC is Draining Energy
1. Remove the Service Side Cover.
2. First, follow the procedure in Section "5.5.2.1 Determining if Serial Driver is Draining Energy" on
page 257.
3. Isolate the compressor power and wait for the LEDs on the Backplane to turn off and then
remove the Serial Driver. Refer to "4.27.4 Serial Driver Removal and Installation" on page 213.
4. Re-apply the compressor power and test the Backplane voltages at the +24V, +15, +5, and -15
VDC test points.
• If all voltages are within (+/- 10%) the BMCC is not draining energy.
• If any of these voltages are not within (+/- 10%) proceed to Step 5.
5. Isolate the compressor power and wait for the LEDs on the Backplane to turn off.
6. Remove the BMCC (refer to "4.28.4 BMCC Removal and Installation" on page 217) (ensure the
Inverter cable remains connected).
7. Re-apply the compressor power.
8. Test the Backplane voltages at the +24V, +15, +5, and the -15 VDC test points.
• If all voltages are within (+/- 10%) the BMCC is draining energy.
• If any of these voltages are not within (+/- 10%) another component is draining energy.
5.5.2.3 Determine if PWM is Draining Energy
1. Remove the Service Side Cover.
2. First, follow the procedures in Section "5.5.2.1 Determining if Serial Driver is Draining Energy"
on page 257 and "5.5.2.4 Determining if Inverter is Draining Energy" on page 258.
3. Isolate the compressor power and wait for the LEDs on the Backplane to turn off and then
Remove the Serial Driver (refer to "4.27.4 Serial Driver Removal and Installation" on page 213)
and BMCC (refer to "4.28.4 BMCC Removal and Installation" on page 217).
4. Re-apply the compressor power and then test the Backplane voltages at the HV+, +17HV,
+24V, +15, +5, and -15 VDC test points.
• If all voltages are within (+/- 10%) the PWM is not draining energy.
• If any of these voltages are not within (+/- 10%) proceed to Step 5.
5. Isolate the compressor power and wait for the LEDs on the Backplane to turn off.
6. Verify the PWM diodes. Refer to "4.29.3.3 Verify Functionality of the Five Diode Sets" on page
221.
7. Remove the PWM (refer to "4.29.4 PWM Removal and Installation" on page 221) (keep the
Inverter cable connected).

Danfoss Turbocor TTS Series Specifications

General

Brand	Danfoss
Model	Turbocor TTS Series
Category	Compressor
Language	English