MULTI VRF-Ⅱ INDOOR UNIT SERVICE MANUAL EUROPEAN/LATIN AMETICA (R410A)
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Power-on High-pressure Protection Fault Interface
Note: If the IDU connected with the current wired controller is a fresh-air IDU, “FAP” is displayed
on the main interface of the wired controller. Only the outlet temperature can be set for the fresh-
air IDU. For the setting method, see the "IDU Function Settings" section.
5.2 Engineering Application Functions Operated through the XK49 Wired Controller
XK49 Wired Controller
5.2.1 Master IDU Settings
Method 1: In power-off status, press and hold the “MODE” button for five seconds to set the IDU
connected with the current wired controller to master IDU. If the setting is successful, “MASTER” will be
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