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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 Outdoor Unit Multi-Split Type Air Conditioner 2MXS18NMVJU

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Maintenance Plans for Daikin Outdoor Unit Multi-Split Type Air Conditioner Model 2MXS18NMVJU

Integrate maintenance plans directly into your work orders in MaintainX.

Capacitor Voltage Check

Warning: This procedure requires trained personnel with PPE!

Main circuit checked for short circuit?

Warning: Never touch any live parts during the procedure.

Voltage between FU2 and DC–

Is the voltage 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

Rotation Pulse Check

Outdoor fan motor

Voltage between the pins 4 - 7

Control voltage between the pins 4 - 3

Rotation command voltage between the pins 4 - 2

Pulses at the pins 4 - 1 when the outdoor fan motor is rotated 1 turn by hand

Fuse melted?

If NG in step 2

If NG in step 4

If OK in both steps 2 and 4

Run this procedure

Power Module Check

Warning: Ensure the voltage between (+) and (-) of the power module is about 0 V before proceeding

Enter the voltage between (+) and (-) of the power module

Disconnect the compressor harness connector from the outdoor unit PCB. To disengage the connector, press the protrusion on the connector.

Was the compressor harness connector successfully disconnected?

Measure resistance between the (+) or (-) terminal of the power module and the U, V or W terminal of the compressor with a multimeter.

Enter the resistance measurement

Evaluate the measurement results

Sign off on the power module check

Run this procedure

Power Supply Waveform Check

Warning: This check requires trained personnel with PPE!

Measure the power supply waveform between No. 1 and No. 2 on the terminal board

Upload a photo of the measured waveform

Is the power supply waveform a sine wave?

Is there waveform disturbance near the zero-cross?

Sign off on the power supply waveform 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.

Run this procedure