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Documents & Manuals

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Tensioning Guide
Belt-diagram
C-120 pulleys
+ 13 more

Work Order Templates

Pre-built workflows to keep your asset running smoothly.

Daily Electrical System Inspection
Replace Roller and Pulley
Install Engine B-120
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Procedures

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Motion Industries
Applied Industrial Technologies
Electrical Brothers
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Parts

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Drive Motor
B2 Rollers
Tensioning System
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Daikin Indoor Unit Multi-Split Type Air Conditioner FTXR18TVJUS

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Maintenance Plans for Daikin Indoor Unit Multi-Split Type Air Conditioner Model FTXR18TVJUS

Integrate maintenance plans directly into your work orders in MaintainX.

Capacitor Voltage Check

Warning: Check the main circuit for short circuit before proceeding

Circuit breaker is still on

Warning: Never touch any live parts

Voltage between FU2 and DC–

Voltage is 50 V or less

Ensure firm contact between the multimeter probes and the test points

Sign off on the capacitor voltage check

Run this procedure

Electronic Expansion Valve Check

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

1. Check if the EV connector is correctly inserted in the PCB. Match the EV unit number and the connector number.

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

3. If any of the EVs does not generate a latching sound in the above step 2, disconnect that connector and check the continuity using a multimeter.

Check the continuity between the pins 5 - 1, 5 - 2, 5 - 3, 5 - 4. If there is no continuity between the pins, the EV coil is faulty.

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

5. If the continuity is confirmed in the above step 3, mount a good coil (which generated a latching sound) in the EV unit that did not generate a latching sound, and check if that EV generates a latching sound.

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

∗If a latching sound is not generated, the EV unit is faulty.

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Hall IC Check

CDXS, FDXS Series

Check the connector connection

With the power on, operation off, and the connector connected, check the following

Output voltage of about 5 V between pins 1 and 3

Generation of 3 pulses between pins 2 and 3 when the indoor fan motor is operating

If NG in step (1)

If NG in step (2)

If OK in both steps (1) and (2)

Sign off on the Hall IC Check

Run this procedure

Indoor Fan Motor Connector Check

CTXG, FTXR, CTXS, FTXS, FVXS Series

1. Check the connection of connector.

2. Check motor power supply voltage output (pins 4 - 7).

3. Check motor control voltage (pins 4 - 3).

4. Check rotation command voltage output (pins 4 - 2).

5. Check rotation pulse input (pins 4 - 1).

FDMQ Series

1. Turn the power supply OFF.

2. With the fan motor connector disconnected, measure the resistance between each pin, then make sure that the resistance is more than the value mentioned in the following table.

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Inverter Analyzer Check

Warning: This procedure requires trained personnel with PPE!

Is the power turned off?

If power is not turned off, stop the procedure and turn off the power

Is the inverter analyzer installed instead of a compressor?

Warning: Ensure the charged voltage of the built-in smoothing electrolytic capacitor drops to 10 VDC or below before proceeding

Are the terminals (U,V,W) not touching each other?

Warning: High voltage is applied if terminals touch each other

Is the power transistor test operation activated from the outdoor unit?

Diagnose according to 6 LEDs lighting status

Run this procedure