Precautions - Mitsubishi Electric PUHY-P250YNW-A Service Handbook

[9-2 Operation Data Collection and Storage Functions ]
9-2-4

Precautions

For dealing with display on the maintenance LED and other problems, refer to Section [9-4 Maintenance LED Display and
Troubleshooting].
1. Storage of data in a USB memory stick
Take extra care regarding electric shock during the work on the control board, such as the insertion of the USB memory stick.
Before starting in Normal Mode, remove the USB memory stick from the control board.
Storing data in the USB memory stick may take a long time resulting in OS and communication errors. These errors affect
neither storing process nor unit operation. If an error occurs, refer to [9-4-2 Troubleshooting].
After normal startup, set the operation status of the air-conditioning units to the original status.
USB memory sticks may become unusable due to unexpected damage or memory shortage. It is recommended to take extra
USB memory sticks to the site.
If only the OS is operated due to problems with the OC, collect data also from the OS by following the same operation proce-
dure as for OC. Refer to Section [9-2-2 Storing Data on a USB Memory Stick].
2. Collection of operation data
The collection of operation data does not start immediately after power-on, but does after ten minutes.
When operation data are collected from AE-200 or from the Maintenance Tool, the operation data collection function on the
outdoor unit (OC) will be disabled.
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