TP-6745 7/10 37Section 2 Troubleshooting
2.11 MPAC 1500 Controller
Troubleshooting Flowcharts
This section contains troubleshooting flowcharts for the
MPACt 1500 ATS controller. Use these instructions to
diagnose problems with the MPACt 1500 ATS
controller and identify the parts that require service or
replacement, rather than replacing the entire controller
assembly.
Use the troubleshooting charts in Figure 2-19 through
Figure 2-23 to diagnose and correct the following
problems on the MPAC 1500 controller.
D Incorrect voltage sensing
D Blank display
D Slow or no transfer to utility
D Strange characters on display or controller lockup
Refer to the operation/installation manual and wiring
diagrams provided with the transfer switch during the
procedure. See Figure 2-24 for an illustration of the
controller’s main logic board and power supply board.
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