User manual MITSUBISHI MSC-A12YV SERVICE MANUAL

[. . . ] SPLIT-TYPE, AIR CONDITIONERS SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS HFC utilized No. OB329 SERVICE MANUAL Wireless type Models R410A MSC-A07YV MSC-A09YV MSC-A12YV - E1 (WH) (WH) (WH) E1 E1 CONTENTS 1. TECHNICAL CHANGES ····································3 2. PART NAMES AND FUNCTIONS······················3 3. [. . . ] The indoor unit will only accepts the signal from the remote controller that has been assigned to the indoor unit once they are set. The setting will be cancelled if the breaker has turned off, or the power supply has shut down. Please conduct the above setting once again after the power has restored. 17 9-3. REMOTE CONTROLLER (How to set the type) This remote controller setting needs to be switched according to the type of air conditioner (COOL & HEAT or COOL ONLY). If the setting is incorrect, the air conditioner does not operate normally. Therefore, check if the setting corresponds to the type of air conditioner. If not, correct the setting as shown below. Slide switch Type COOL & HEAT COOL ONLY The position of the slide switch 9-4. MU & MUX TYPE / MUH & MXZ TYPE SWITCH OVER AND AUTO RESTART FUNCTION 1. MU & MUX TYPE / MUH & MXZ TYPE SWITCH OVER SW2-1 sets the AUTO RESTART FUNCTION ON / OFF. The indoor units for MU & MUX type and MUH & MXZ type SW2-2 switches over the MU & MUX type / MUH & MXZ type. Set switch according to the When the units are shipped from the factory, SW2 is as follows. The units are set for SW2-1: AUTO RESTART FUNCTION ON MUH & MXZ type when they are shipped from the factory. SW2-2: MUH & MXZ type } How to switch over MU & MUX TYPE / MUH & MXZ TYPE !board, and change switch(SW2-2) on the indoor electronic control P. C. board according to the type of outdoor unit as following figures. 1 C1 F11 TAB12 L101 C N 1 21 CN201 CN202 CN112 FRONT CN121 CN151 Outdoor unit MU & MUX type Set 2 switch upside. Outdoor unit MUH & MXZ type Set 2 switch downside. IC101 SW1 12 12 SW2 SW2 connected on the terminal block, the unit does not operate normally. ·If a ground is incorrect, it may cause an electric shock. AUTO RESTART FUNCTION When the indoor unit is controlled with the remote controller, the operation mode, set temperature, and the fan speed are memorized by the indoor electronic control P. C. board. The "AUTO RESTART FUNCTION" sets to work the moment power has restored after power failure. Then, the unit will restart automatically. However if the unit is operated in "I FEEL CONTROL" mode before power failure, the operation is not memorized. In "I FEEL CONTROL" mode, the operation is decided by the initial room temperature. "AUTO RESTART FUNCTION" is ON when the units are shipped from the factory. [. . . ] (5) Release the hooks to open the motor band slightly. (6) Loosen the hexagon socket set screw from the line flow fan. (7) Remove the screws fixing the motor bed, remove the fan motor with motor band and the motor bed. (8) Remove the screws fixing the left side of the heat exchanger. [. . . ]