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Troubleshooting
3
Remove the battery from the expander, making note of the battery's polarity.
4
Insert the new battery into the expander, matching the polarity of the battery you removed.
5
Push the black clip back onto the battery until you hear both sides click in place.
6
Download the MPC Open XP.
To replace the fuse
If you turn on the MPC Open XP's power switch and the Power LED is not lit, use a multimeter to see if one of the 3
Amp Pico fuses that protects the incoming power is blown.
Controller
Power
24ac/26dc
Return
Off
Expander
Fuses
You can order replacement 3 Amp Pico fuses from a local or online retailer.
Before replacing the fuse, try to determine why the fuse blew.
•
Check the Power wiring polarity of the MPC Open XP, any attached expanders, and any other controllers that
share the power supply. Use the same polarity for all of them.
•
Verify that outputs are wired to the appropriate types of devices. See Outputs (page 15). For example, you
cannot wire a 24 Vac device to an output.
•
MPC Open XP - If the Aux Power Out port is used, verify that it is wired correctly. See To wire inputs and
outputs (page 16).
MPC Open XP
MPC Open XP IO48/816
Installation and Start-up Guide
On
Fuse
Carrier Proprietary and Confidential
32
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