Rockwell Automation 20Y PowerFlex 700H, 700S, and 700AFE Drive Fan Systems, Frames 9...14 - Manual (Page 274)

274 Rockwell Automation Publication PFLEX-IN029B-EN-P - August 2014
Appendix A PowerFlex 700H and 700S Diagnostic Procedures
Testing the Main Fan Inverter
Circuit Board Diagnostic LEDs
Bench test fixture: With the fan system removed from the drive, a bench test can
be completed to evaluate the status of the fan inverter board. The fan inverter
board can be controlled with a simple test fixture. The following schematic
illustrates the test fixture control that lets the fan inverter board exercise the
LEDs and rotate the fan when commanded.
ATTENTION: Potentially fatal voltages may result from improper usage of a
multimeter and other test equipment. The chassis may be at a potentially fatal
voltage if not properly grounded. If a multimeter is used to measure high
voltage waveforms, use appropriately rated differential voltage probes. Be sure
that they are set to the highest voltage scaling in order to achieve safe
measurement resolution.
ATTENTION: The fan control uses the -DC bus voltage reference as a common
reference. Therefore, if the drive is used as the DC voltage source, the board
common reference will be at -DC bus voltage and NOT at earth ground.
ATTENTION: If the fan motor and plenum chamber is removed from the drive
for this test, it must be properly secured to the test fixture to ensure it will not
move or shift when the fan is commanded to rotate.
ATTENTION: Severe injury or death can result from electrical shock, burn, or
unintended actuation of controlled equipment. Follow safety related practices
of NFPA 70E, ELECTRICAL SAFETY FOR EMPLOYEE WORKPLACES. DO NOT work
alone on energized equipment!
X2
2
1
+
-
X8
1 2 3 4 5 6 7
X3
1 2 3 4
X4
X5
NC NC NC
+18V
Fan
Control
NC
-DC Ref
Fan Next Alarm
NC NC
+18V
Fan - Blue
Fan - Black
To
Fan
Transformer
Fan Power Supply
DC Power
Supply
SW2
SW1
AC
Fan
AC Fan System
7 µF
Cap.
DC Fan System
DC Fan X82
ATTENTION: If a drive is used as the DC power source, the circuit common
reference will be at negative DC bus voltage and NOT at earth ground.
ATTENTION: If the fan motor and plenum chamber is removed from the drive
for this test, it must be properly secured to the test fixture to ensure it will not
move or shift when the fan is commanded to rotate. Failure to do so can result in
equipment damage or personal injury.