Dc-Dc Connections; Removal And Installation; Figure 186 - Dc-Dc J1 Connection And J12 -J13 Test Points - Danfoss Turbocor VTT Series Service Manual

Variable twin turbo compressors

Table of Contents

5.1.1 DC-DC Connections

5.1.2 Removal and

Installation

Figure 186 - DC-DC J1

Connection and J12 -J13

Test Points

144 of 165

M-SV-VT-001-EN Rev. A

OEM Module Components

1. HV DC IN J1

2. 250 V DC OUT J2

3. 24 V DC OUT J4

4. Ground M4, M5, J6, and J7

Removal (Revisions A and B):

1. Isolate the VFD power as described in the

this manual.

2. Open the panel containing the DC-DC. Verify the HV DC input from VFD is below 5 VDC by

checking at VDC+ (J12) and VDC- (J13) test points on DC-DC with a DC voltage meter.

3. Disconnect the HV DC input cable from J1; 24 VDC output cable from J4; and 250 VDC output

cable from J2. Refer to Figures 186 (DC-DC J1 Connection and J12-J13 Test Points) and 2 (DC-DC

J2 and J4 Connections).

J12 Test Point

J1 Connector

J13 Test Point

"Electrical Isolation of the Compressor/VFD"

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