Section 5
Troubleshooting
Troubleshooting 5-1
MN715
The Baldor Series 15H Control requires very little maintenance, if any, and should provide
years of trouble free operation when installed and applied correctly. Occasional visual
inspection and cleaning should be considered to ensure tight wiring connections and to
remove dust, dirt, or foreign debris which can reduce heat dissipation.
Operational failures called “Faults” will be displayed on the keypad display as they occur.
A comprehensive list of these faults, their meaning and how to access the fault log and
diagnostic information is provided later in this section. Troubleshooting information is
provided in table format with corrective actions later in this section.
Before attempting to service this equipment, 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 at least 1 meg Ohm input impedance. In some cases, an
oscilloscope with 5 MHZ minimum bandwidth may be useful. Before contacting Baldor,
check that all power and control wiring is correct and installed according to the
recommendations in this manual.
No Keypad Display - Display Contrast Adjustment
When AC power is applied to the control the keypad should display the status of the
control. If there is no display visible, use the following procedure to adjust the display.
(Contrast may be adjusted in the display mode when motor is stopped or running).
Action
Description
Display
Comments
Apply Power
No visible display.
Press DISP key
Places control in Display mode.
Display mode.
Press SHIFT key 2 times Allows display contrast
adjustment.
Press
or
key
Adjusts display contrast
(intensity).
Press ENTER key
Saves display contrast
adjustment level and exits to
display mode.
