US drives AC Regen, Instruction Manual

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AC REGEN 16
AC REGEN POWER CIRCUIT TABLE
WARNING
To avoid an electric shock hazard, after the input and control power is removed from the drive and
the AC Regen, wait five (5) minutes for Bus capacitors to fully discharge (DC Bus capacitors of the
drive and the AC Regen). Verify that the voltage on the bus capacitors has discharged by
measuring the DC bus voltage at the +DC & –DC terminals of the drive. The voltage must be zero.
Fuse Check
:
Check all fuses. Do not replace any fuse before performing the following checks. Please note if an on-board
fuse (soldered to the control board) is open, do not attempt to replace it. An open on-board fuse indicates a
damaged board.
Visual Check:
Check all fuses, boards, wire harnesses, connectors, bus bars and enclosure walls for discoloration
Ohmic Check :
Check IGBT personality boards for the following:
-
Burnt or discolored resistors R1, R2, & R3 (6 sets per Regen)
-
Shorted D1 & D2 using meter set for diode check (6 sets per Regen).
These personality boards are either soldered or screwed on the IGBT’s (power transistors).
+ Lead

Lead Meter setting Reading
L1, L2, L3 VC+ @ PCB Connector P2 DIODE 0.3 - 0.5
VC- @ PCB Connector P2 L1, L2, L3 DIODE 0.3 - 0.5
DC+ @ User Connection VC+ @ Connector P2 DIODE 0.3 - 0.5
VC- @ PCB Connector P2 DC- @ User Connection DIODE 0.3 - 0.5
VC+ @ Connector P2 DC+ @ User Connection DIODE OL
DC- @ User Connection VC- @ PCB Connector P2 DIODE OL
VC+ @ PCB Connector P2 L1, L2, L3 DIODE OL
L1, L2, L3 VC- @ PCB Connector P2 DIODE OL
L1, L2, L3 CHASSIS GND 200k ohms OL
DC+ @ User Connection CHASSIS GND 200k ohms OL
DC- @ User Connection CHASSIS GND 200k ohms OL
VC+ @ PCB Connector P2 CHASSIS GND 200k ohms OL
VC- @ PCB Connector P2 CHASSIS GND 200k ohms OL