Daikin Indoor Unit Wall Mounted Type CTXG50EV1BW

Warning: Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work.

Warning: Since it may happen that refrigeration oil in the compressor will catch fire, prepare wet cloth so as to extinguish fire immediately.

Warning: Ventilate when refrigerant leaks during the work. (If refrigerant contacts fire, it will cause to arise toxic gas.)

Caution: Be careful not to get yourself burnt with the pipes and other parts that are heated by the gas welding rod.

Disconnect the flagshaped terminals.

Detach the compressor lead wire.

Warning: Never touch any live parts for at least 10 minutes after turning off the circuit breaker.

If unavoidably necessary to touch a live part, make sure there is no DC voltage using the tester.

Check the continuity with the tester. Reverse the pins and make sure there is continuity.

Sign off on the capacitor check

Warning: Ensure the power is off before starting the procedure

Limit switch located at the left side of the drain pan assembly

Continuity of the switch connection checked

Can the shutter be opened and closed with hand?

Shutter opened all the way for continuity check

Shutter closed all the way for continuity check

Sign off on the limit switch continuity check

Warning: Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work.

1. Remove the electronic expansion valve coil

★ Illustrations are for 3 room model.

1 Remove the each electronic expansion valve coil.

2. Remove the four way valve coil

1 Loosen the 1 screw to remove the four way valve coil.

3. Remove the liquid/gas pipe thermistor

Meet the edge of the thermistor and clip.

The number of ports is different according to the models.

Conduct the followings to check the electronic expansion valve (EV).

1. Check to see if the EV connector is correctly inserted in the PCB. Compare the EV unit and the connector number.

2. Turn the power off and back on again, and check to see if all the EVs generate latching sound.

3. If any of the EVs does not generate latching noise in the above step 2, disconnect that connector and check the conductivity using a tester.

Check the conductivity between pins 1, 3 and 6, and between pins 2, 4 and 5. If there is no conductivity between the pins, the EV coil is faulty.

4. If no EV generates latching sound in the above step 2, the outdoor unit PCB is faulty.

5. If the conductivity is confirmed in the above step 2, mount a good coil (which generated latching sound) in the EV unit that did not generate latching sound, and check to see if that EV generates latching sound.

∗If latching sound is generated, the outdoor unit PCB is faulty.