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PCB wiring (830kB)

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PCB Replacement Guide for CTS Toilets

This document is designed to assist customer service and technical staff in guiding customers or performing the replacement of the Printed Circuit Board (PCB) in older CTS toilets with a new PCB supplied from the factory. It includes specifications, troubleshooting steps, operating instructions, and installation procedures.

PCB Compatibility

Models and Serial Numbers

• CTS4110: New PCB and wiring loom are compatible with units having a serial number after 75220061. The first digit represents the year, and the second and third digits represent the week of manufacture. Example: DOMETIC 180311 indicates the year 2018, week 11.
• CTLP4110: New PCB and wiring loom are compatible with units having a serial number after 81121001.

Installation Procedure

Replacing an Old PCB with a New PCB

1. Identify the Toilet Model and Serial Number: Ensure the toilet model and serial number match the compatibility requirements.
2. Remove the Faulty PCB: Carefully remove the existing PCB from the toilet.
3. Prepare the New PCB: Unpack the new PCB and have it ready for installation.
4. Disconnect Wires: Safely disconnect the wires from the solenoid.
5. Replace Reed Switches and Wiring: Remove the two reed switches and cassette wiring. Use a rope to pull out the old wires and thread in the new ones.
6. Prepare Reed Sensors and Cassette Switches: Cut 200mm off the reed sensors and cassette switches that will be retained in the toilet. For the replacement PCB, cut 400mm off the reed sensors and cassette wires.
7. Strip Wires: Use a wire stripper to strip each end of the wires to be connected.
8. Connect Wires: Slide heat shrink over the wires, twist them together according to the matching color code, and then apply heat to the heat shrink to secure the connection.
9. Secure and Protect Connections: Optionally, tidy up the connections with electrical tape or use a larger heat shrink before applying heat.
10. Final Checks: Ensure all wires are securely retained and the cassette track is clear of debris.

Replacing a New PCB with an Old PCB

For toilets built after the specified dates that require an old style PCB to be fitted to the latest series of production, follow the steps outlined above. It is crucial to have reed sensors and cassette wires for joining purposes.

Important Notes

• When fitting a new style PCB to older models, removal and replacement of the two reed switches and cassette wiring are required.
• Ensure all connections are secure and properly insulated to prevent any electrical faults.
• Always check for clearances and ensure no wires are pinched or in a position where they could be damaged during operation.

This guide is intended to provide comprehensive instructions for the replacement of PCBs in CTS toilets. For any further assistance, please refer to the technical support team.