Mitsubishi Electric City Multi PURY-EM200YNW-A1, Service Handbook

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[9-3 Software Rewrite Function on the USB (Outdoor unit, HBC) ]
BS_09_F chapter 9 -
9
9 USB Func
tion
(3) Confirmation of operation
[Outdoor unit]
1) Disconnect the portable battery charger from CN601 on the control board of the outdoor unit. The control board of the outdoor
unit will be turned off.
2) Remove the USB memory stick from the USB port (CNUSB) on the control board of the outdoor unit.
3) Turn off the switches SW7-9 on the control board of the outdoor unit.
4) Turn on the outdoor unit, and check that the versions of the outdoor unit and the software are the same.
The version of the software may be found using the maintenance tool or other means.
Perform a test run, and check for normal operation.
[HBC]
1) Disconnect the portable battery charger from CN703 on the HBC control board. The control board of the HBC will be turned off.
2) Remove the USB memory stick from the USB port (CNUSB) on the control board of the outdoor unit.
3) Turn off the switches SW002-9 on the HBC control board.
4) Turn on the HBC, and check that the versions of the HBC and the software are the same.
The version of the software may be found using the Maintenance Tool or other means.
Perform a test run, and check for normal operation.
9-3-3 Precautions
For dealing with the displays shown on the maintenance LED and other problems, refer to Section [9-4 Maintenance LED
Display and Troubleshooting]

Take care to choose the correct countermeasure program for the intended model and version.
Store only one software rewrite program on the USB memory stick.
If this requirement is not met, software rewrite may not start.

Be cautious of electric shock when connecting an USB memory stick or a portable battery charger to the control board.

Connect the portable battery charger to the LEAD WIRE ASSY USB and then to the control board.

Use a portable charger that supports the energy-saving mode.

Make sure the portable battery charger is sufficiently charged. Rewrite error may occur if battery charge is insufficient.

Take care not to forget to remove the USB memory stick in step (3) - 2) or forget to turn off the switch in step (3) - 3). [9-3-2
Rewriting Software] If these precautions are not taken, the system may not start normally.

When rewriting ended unsuccessfully, redo the procedure from step (1) - 3). [9-3-2 Rewriting Software]When rewriting ended
unsuccessfully, the system may be started in Software Rewrite Mode instead of using the switches on the control board.
Also refer to Section [9-4-2 Troubleshooting].

If software cannot be successfully rewritten using an USB memory stick, use a ROM writer to rewrite the software.

A battery charger not compatible with the energy-saving mode may turn off while the data are being collected or while the S/
W is being re-written, and these actions may not be completed successfully.
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