3
INTRODUCTION
The Carrier VFD option Start-Up and Service Manual is intended
for trained and qualified service personnel and is to be used during
start-up, operation, and maintenance of Rockwell/Allen-Bradley
PF755L drive.
ABBREVIATIONS AND EXPLANATIONS
Frequently used abbreviations in this manual include:
Required Publications
The Carrier VFD option Start-Up and Service Manual must be
used with the following manuals:
• Latest version of the PowerFlex Drives with TotalFORCE
Control Manuals
• Latest revision of the Start-Up, Operation, and Maintenance
Instructions for 19XRV or 23XRV with PIC6 Controls
Getting Assistance from Rockwell Automation
Contact the local Rockwell Automation sales office with any
questions or problems relating to the products described in this
manual. For technical support on drives, call the HVAC Hotline at
1-440-646-3434 Select Option 3 (Technical Support), then select
Option 5 (More Options), Direct Dial Code for PowerFlex 755
drives is 500.
Before calling, have the following information available from the
Allen-Bradley data nameplate located inside the enclosure on the
right wall. See Fig. 1.
• Allen-Bradley ID or CAT. NO.
• Carrier VFD Code (Carrier Part Number)
• Allen-Bradley serial number
Fig. 1 — Allen Bradley Power Module Data Nameplate
IDENTIFYING DRIVE COMPONENTS
Chiller control schematics and VFD schematics are included in
APPENDIX A — WIRING SCHEMATICS.
Opening the VFD Access Door
1. Using recommended screwdriver (6.4 mm [0.25 in.] flat or
T20 star), open access door. See Fig. 2.
2. Check to be sure that voltage between DC+ and DC– and
from each DC terminal to the chassis is zero before proceed-
ing. See Fig. 3.
Fig. 2 — Opening Access Door
Fig. 3 — Check DC Bus Terminals
DC — Direct Current
DPI — Drive Peripheral Interface
ENET — Ethernet
HMI — Human Machine Interface
ICVC — International Chiller Visual Controller
IGBT — Insulated Gate Bipolar Transistor
I/O — Inputs/Outputs
IP — Internet Protocol
ISM — Integrated Starter Module
MCB — Main Control Board
MOV — Metal Oxide Varistor
PE — Protective Earthing Conductor
PIC — Product Integrated Control
PWM — Pulse Width Modulation
SIO — Sensor Input/Output
STS — Status
VFD — Variable Frequency Drive
WARNING
DC bus capacitors retain hazardous voltages after input power
has been disconnected. After disconnecting input power, wait
five (5) minutes for the DC bus capacitors to discharge and
then check the voltage with a voltmeter rated for the DC bus
voltage to ensure the DC bus capacitors are discharged before
touching any internal components. Failure to observe this
precaution could result in severe bodily injury or loss of life.
An isolated multimeter will be needed to measure DC bus
voltage and to make resistance checks. The drive’s DC bus
capacitors retain hazardous voltages after input power has been
disconnected.
WARNING
Before removing the drive enclosure, open access door and
verify that the DC bus voltage has dropped to zero by checking
the terminals behind the access door. Failure to observe this
precaution could result in severe bodily injury or loss of life.
Wall Mount Drives
19MV
Floor Mount Drives (Typical)
19XR6
1
L1 L2 L3
O
I
2
DC+ DC–
0V
0V
Lockout/Tagout
Multimeter
DC Bus Test
Terminals
Located Inside
Access Door
To Next Page
Loading...
