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Airox Legendair CPU Board Replacement

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Introduction

When technical difficulties cannot be resolved by troubleshooting guide and the CPU board is the source of malfunction, a replacement of the CPU board may be necessary. This guide will provide the step-by-step instructions to replace the CPU board.

The repair guide information is mentioned in following sections of the user repair manual:

· Chapter 2 – 2.1.1 Cleaning the Device

· Chapter 2 – 2.4.1 Opening and Closing

· Chapter 5 - 1.1-4 Corrective Maintenance

· Chapter 5 - 2.1 Corrective Maintenance Section

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  1. Airox Legendair CPU Board Replacement, How to Properly Clean the Airox Legendair: crwdns2935265:01crwdnd2935265:01crwdnd2935265:01crwdne2935265:0

    • First, switch off the device.

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    • Place the device in a clean and open environment.

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  3. Airox Legendair CPU Board Replacement: crwdns2935265:03crwdnd2935265:01crwdnd2935265:01crwdne2935265:0

    • Using a cloth or a sponge slightly dampened with a bactericide or germicide solution, gently clean the outside of the device.

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  4. Airox Legendair CPU Board Replacement: crwdns2935265:04crwdnd2935265:01crwdnd2935265:01crwdne2935265:0

    • If necessary, spray the device lightly with the germicide solution, taking account of the requirements discussed in the preliminary operations.

    • Do not allow any liquid to enter inside the device (in particular through the cooling apertures).

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    • Use a gentle air blast to clear away any remaining liquid from ventilator.

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  6. Airox Legendair CPU Board Replacement, CPU Board: crwdns2935265:06crwdnd2935265:01crwdnd2935265:01crwdne2935265:0

    • Make sure to turn off the ventilator before starting the repair.

    • Complete cleaning process.

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  7. Airox Legendair CPU Board Replacement: crwdns2935265:07crwdnd2935265:01crwdnd2935265:01crwdne2935265:0

    • Put the device in a clean and open environment & open the device by removing the five attachment screws (Pl1.20) on the bottom casing side (Pl1-280). Lift the top outer panel away to expose the inside of the device.

    • Gently separate the two casings to avoid tearing off the keypad connections.

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  8. Airox Legendair CPU Board Replacement: crwdns2935265:08crwdnd2935265:01crwdnd2935265:01crwdne2935265:0

    • Disconnect all connectors as follows: Pl1.J3.CPU, Pl1.J2.CPU, Pl1.J8.CPU, Pl1.J1.CPU, Pl1.J5.CPU, and Pl1.J7.CPU of the CPU board.

    • The device must be switched off to reduce electrostatic risk.

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  9. Airox Legendair CPU Board Replacement: crwdns2935265:09crwdnd2935265:01crwdnd2935265:01crwdne2935265:0

    • Unscrew the three attachment screws (Pl1-130) for the CPU board (Pl1-120).

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  10. Airox Legendair CPU Board Replacement: crwdns2935265:010crwdnd2935265:01crwdnd2935265:01crwdne2935265:0

    • Extract the board from its housing and uncouple the exposed set of air tubes (Pl3-130 and Pl3-140).

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  11. Airox Legendair CPU Board Replacement: crwdns2935265:011crwdnd2935265:01crwdnd2935265:01crwdne2935265:0

    • Replace the current CPU board (Pl1-120) with new CPU board and gently put back the set of air tubes as they were first found (Pl3-130 and Pl3-140).

    • These elements may need to be replaced if justified, depending on their general condition. Take special care not to reverse the tubes during reassembly.

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    • Position the new board within its housing and pre-position the three attachment screws (Pl1-130) taken out in Step 4. Validate the position of the board and finish tightening (Torque 5 Nm max).

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To reassemble your device, follow these instructions in reverse order.

Note: If forgotten, these are the following positions of the connectors: Pl1.J3.CPU with the Alarm Reminder strand, Pl1.J2.CPU with the RS232 strand, Pl1.J8.CPU with the FiO2 strand, Pl1.J5.CPU with the Power Supply strand, Pl1.J7.CPU connected to Pl1.J2.CT, Pl1.J1.CPU with the piezo solenoid valve strand.

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Mariana Inofuentes

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CPSU-PATON-S20S7G15

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