Section 5
Troubleshooting
Troubleshooting 5-1
MN722
Baldor Series 22H Controls require very little maintenance and should provide years of
trouble free operation when installed and applied correctly. Occasional visual inspection
should be considered to insure tight wiring connections and to avoid the build up of any
dust, dirt, or foreign debris which can reduce heat dissipation. The control should be
mounted in a location that protects the internal circuits and external wiring from moisture
or liquid contaminants.
When a fault condition occurs, motor operation stops and the fault is displayed on the
Keypad Display. If a REGEN FLT is displayed, this indicates a fault in the converter
section of the control. To determine the specific converter section fault, the keypad must
be moved to the Converting Control Board keypad connector. The fault log can be
examined and the specific faults will help to further isolate the failure. A list of possible
Converting Control Board Fault Messages is given in Table 5-1. Other fault messages
that pertain to the Power Output Control Board are given in Table 5-2.
When a fault has been identified, all input power must be removed from the control to
avoid the possibility of electrical shock. The servicing of this equipment should be
handled by a qualified electrical service technician experienced in the area of high power
electronics.
It is important to familiarize yourself with the following information before attempting any
troubleshooting or service of the control. Most troubleshooting can be performed using
only a digital voltmeter having an input impedance exceeding 1 megOhm. In some
cases, an oscilloscope with 5 MHZ minimum bandwidth may be useful. Before consulting
the factory, check that all power and control wiring is correct and installed per the
recommendations given in this manual.
No Keypad Display - Display Contrast Adjustment
If there is no visible display, use the following procedure to adjust the contrast of the
display.
Action
Description
Display
Comments
Apply Power
No visible display.
Press DISP key
Puts control in Display mode.
Display mode with nothing visible.
Press SHIFT key 2 times Accesses display contrast
adjustment.
Press
Y
or
B
key
Adjusts display contrast
(intensity).
Press ENTER key
Saves display contrast
adjustment level and exits to
display mode.
Summary of Contents for 22H series
Page 5: ...Section 1 General Information iv Table of Contents MN722...
Page 105: ...Section 1 General Information 5 22 Troubleshooting MN722...
Page 109: ...Section 1 General Information 6 4 Manual Tuning the Series 22H Control MN722...
Page 137: ...Section 1 General Information A 8 Appendix A MN722...
Page 138: ...Appendix B Appendix B 1 MN722...
