Danfoss Turbocor VTT Series - Figure 192 - DC-DC 24 and 250 VDC Output (Revisions a and B); Figure 193 - DC-DC 24 and 250 VDC Output (Revisions C and Later); Table 35 - DC-DC Torque Specifications; Torque Specifications

148 of 165 M-SV-VT-001-EN Rev. A
J8
J9
J11
OEM Module Components
Figure 192 - DC-DC 24
and 250 VDC Output
(Revisions A and B)
Description Nm Ft.Lb. In.Lb.
DC-DC Fan, SHCS, M4x35 4 - 35
Ground Screw 6 - 53
Table 35 - DC-DC Torque
Specications
Figure 193 - DC-DC 24
and 250 VDC Output
(Revisions C and Later)
Verication (Revisions C and Later):
1. Ensure all connections are correctly installed.
2. Apply power to the VTT VFD.
3. Verify the LEDs on the CIM are illuminated.
4. On the DC-DC, using an appropriately rated voltage meter, verify HV DC input is correct for the
applied voltage by checking at VDC+ (J12) and VDC- (J13) test points.
• The measured voltage should be at least 1.35 x the AC input voltage
5. Verify the 24 VDC output is correct by checking Pins 4 and 5 at J4.
6. Verify the 250 VDC output is correct by checking Pins 1 and 2 at J2.
J10
J2 Pin 2
J2 Pin 1
J4 Pin 4
J4 Pin 5
5.1.4 Torque
Specications
4. On the DC-DC, using an appropriately rated voltage meter, verify HV DC input is correct for the
applied voltage by checking at VDC+ (J12) and VDC- (J13) test points.
• The measured voltage should be at least 1.35 x the AC input voltage
5. Verify the 24 V DC output is correct by checking at J10 and J11 test points.
6. Verify the 250 V DC output is correct by checking at J8 and J9 test points.