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Documents & Manuals

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Tensioning Guide
Belt-diagram
C-120 pulleys
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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 Cooling-Only Outdoor Unit RKS35G2V1B9

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Maintenance Plans for Daikin Cooling-Only Outdoor Unit Model RKS35G2V1B9

Integrate maintenance plans directly into your work orders in MaintainX.

PCB Removal

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

1. Remove the main PCB.

You can remove the main PCB when you disconnect the lead wires on the terminal board without removing the electrical box.

1 Feature of the main PCB

2 Remove the screw on the terminal board.

3 Release the 2 earth terminals.

4 Pull out the forced operation button PCB. Disconnect the connector [S110] to remove the forced operation button PCB.

Be careful of a sharp protrusion at the back of the forced operation button PCB.

5 Disconnect the relay connector.

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Main Circuit Short Check

Warning: Ensure the voltage between (+) and (–) of the diode bridge (DB1) is approx. 0 V before checking.

Enter the voltage between (+) and (–) of the diode bridge (DB1)

Measure the resistance between the pins of the DB1.

Enter the resistance between the pins of the DB1

Is the resistance ∞ or less than 1 kΩ?

If the resistance is ∞ or less than 1 kΩ, short circuit occurs on the main circuit.

Sign off on the main circuit short check

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Rotation Pulse Check

RK(X)S20-50G2V1B, ARXS20-50G2V1B

Voltage between the pins 4 - 7

Control voltage between the pins 3 - 4

Rotation command voltage between the pins 2 - 4

2 pulses (0 ~ 15 VDC) are output at the pins 1 - 4 when the fan motor is rotated 1 turn by hand

If NG in step 2 → Defective PCB → Replace the outdoor unit PCB

If NG in step 4 → Defective Hall IC → Replace the outdoor fan motor

If OK in both steps 2 and 4 → Replace the outdoor unit PCB

RK(X)S20-35G2V1B9, ARXS20-35G3V1B

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Four Way Valve Removal

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

Pull out the electronic expansion valve coil.

Remove the terminal cover.

Disconnect the lead wires of the compressor.

Remove the screw and remove the four way valve coil.

Warning: Be careful not to get yourself burnt with the pipes and other parts that are heated by the gas brazing machine.

Warning: If the refrigerant gas leaks during work, ventilate the room. (If the refrigerant gas is exposed to flames, toxic gas may be generated.)

Caution: From the viewpoint of global environment protection, do not discharge the refrigerant gas in the atmosphere. Make sure to collect all the refrigerant gas.

Cautions for restoration

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Thermistor Resistance Check

Warning: Disconnect the connectors of the thermistors from the PCB before proceeding

Thermistors disconnected from the PCB

Measure the resistance of each thermistor

Upload a photo of the tester reading

Select the model of the thermistor

Sign off on the thermistor resistance check

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