Mitsubishi Electric CITY MULTI PEFY-P22VMS-E-S Data Book page 253

3. System remote controller
(3) Power supply of M-NET from outdoor unit connector TB3.
AT-50A can also receive power supply from R410A/R407C/ R22 outdoor unit connector TB3. However, if the
outdoor unit shuts down, AT-50A will also automatically shut down. Therefore, this scheme is not recommended
for air conditioning system consisting of multiple outdoor units.
CN41
Advanced touch controller
AT-50A
Indoor/outdoor transmission line
TB3
ME remote
cotroller
Fig. 3 AT-50A, TB3 scheme.
CONTROLLER
C7-R Rev.
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