Mitsubishi Electric PURY-M200YNW-A1 Service Handbook page 396

[8-14 HBC Maintenance Instructions (Applicable to main and sub HBCs) ]
2. Debris removal operation
[When an outdoor unit is connected, and refrigerant piping work, evacuation of refrigerant circuits, and refrigerant charging have
been completed]
1. Turn on DIP SW002-1 if there is a possibility that the debris may have been introduced into the water circuits during piping work on site.
Use DIP SW002-1 to start the debris removal operation. (Each manual air vent valve must stay open.)
Control board (LED, DIP SW positions)
2. Debris removal operation will be completed in 40 minutes, and the LED on the control board will indicate "Air0." The LED indication will
change to "Air1," "Air2," and "AirE" in order. Then, the water pump inside the HBC will stop.
3.
[When no outdoor units are connected, or refrigerant piping work, evacuation of refrigerant circuits, and refrigerant charging have not
been completed (when performing debris removal operation for the water circuits only)]
The following must be completed before performing debris removal operation.
• Assign M-NET addresses to the HBC and the indoor units.
•
•
* While the debris removal operation is being performed, no other functions of the Maintenance Tool are available for use.
1. Follow the procedures below after connecting the MN converter and starting up the Maintenance Tool. (Manuals are accessible from the
Maintenance Tool.)
<Debris removal operation procedure (without connection to an outdoor unit)>
1
2
*
3 After the units are searched for, a sign that indicates the completion of preparation will
appear. Turn on DIP SW002-1 of the Main-HBC to start the operation.
2. The LED on the control board will indicate "Air1," "Air2," and "AirE" in order, and the pump will stop after a while.
The progress of the debris removal operation will appear on the service LED of the Main-HBC and on the Maintenance Tool window.
3.
[The rest of the procedures are the same for performing debris removal operation with connection to an outdoor unit (refrigerant piping work,
evacuation of refrigerant circuits, and refrigerant charging have been completed) and without connection to an outdoor unit (refrigerant piping
work, evacuation of refrigerant circuits, and refrigerant charging have not been completed]
BS_08_L
LED position
DIP SW position
5.43
Maintenance Tool window
(Debris removal operation without connection
to an outdoor unit)
002-1.
002-1.
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chapter 8 -