Danfoss VLT HVAC Drive FC 100 Service Manual page 173

8 E-Frame Sizes Disassembly and Assembly
Instructions
Figure 8.10: SCR and Diode Modules (3 of 3)
8
1
2
3
4
REASSEMBLY
1.
2.
Attaching Hardware
T50
T25
17 mm
13 mm
10 mm
8 mm
8-12
11. Note which gate lead connects to which SCR module. Ensure that the correct wire is
attached to the applicable SCR upon reassembly. Remove the wiring from each SCR
module. The connector is keyed for proper reinstallation. DO NOT force the connection.
12. Remove the SCR or diode module by removing the 4 retaining screws (T25) from
each module.
5
4
3
2
1
SCR module SCR2
Retaining screw (Step 12)
SCR module SCR1
SCR gate lead connection (Step 11)
Equipment Damage!
Do not reverse the SCR and diode modules during installation. Reversing the SCR
and diode modules can result in equipment damage.
NOTE!
For each AC input phase, there is one SCR module and one diode module. The SCR
is on the left, the diode on the right (as seen facing the upright unit). There are three
pairs. Only the SCR module has a connection pin for the gate signals.
Replace SCR and diode modules in accordance with the instructions included with the
replacement modules.
Reassemble in reverse order.
Tightening Torque
Per spare part instruction
Per spare part instruction
19 Nm (170 in-lbs)
9.5 Nm (85 in-lbs)
4 Nm (35 in-lbs)
2.3 Nm (20 in-lbs)
MG.90.L1.22 - VLT
High Power Service Manual for VLT
6 7
5 Diode module D1
6 Diode module D2
7 Diode module D3
8 SCR module SCR3
® is a registered Danfoss trademark
®
FC Series
Adjustable Frequency Drives
8