DWT BWT PERMAQ Pico 10-90

Questions and Answers

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daleruizAug 6, 2025
What to do if DWT BWT PERMAQ Pico 10-90 shows 'A1 Inlet pressure low'?
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  Trevor RoseAug 6, 2025
  If you're seeing an 'A1 Inlet pressure low' error on your DWT Water Filtration System, it could be due to several reasons. The raw water inlet pressure might be too low, or the water supply could be interrupted. There might be water leakage, or the pre-filter may be blocked. Rapid pressure changes could also be a factor. It's also possible that the pressure switch is either not connected properly or is defective, or the raw water solenoid valve is defective. To resolve this: * Check the inlet pressure and ensure the water supply isn't affected. * Seal any water leaks. * Replace the pre-filter. * Eliminate pressure fluctuations. * Have qualified personnel check the connection at the appropriate terminal to P21.01. * Replace the pressure switch.
C
clarkjosephAug 12, 2025
How to fix 'A1 Battery low' on DWT BWT PERMAQ Pico 10-90?
- M
  Melissa ReidAug 12, 2025
  If your DWT Water Filtration System displays an 'A1 Battery low' error, it means the battery is empty, and the device can no longer display the system time. To fix this, change the battery and then acknowledge the alarm. After replacing the battery, check the system time under Read SERVICE MENU > System settings to ensure it's set correctly. The countdown of seconds indicates that the system time is set correctly.
A
Alex WolfAug 17, 2025
Why does my DWT Water Filtration Systems show 'A1 Voltage 24V'?
- S
  sara78Aug 17, 2025
  The 'A1 Voltage 24V' error on your DWT Water Filtration Systems indicates that the main board supply voltage is less than DC 22 V, or there are heavy fluctuations in the voltage supply. To address this, check that the connection is correct and verify the input voltage.
K
Kristy WilliamsAug 25, 2025
What causes 'A1 HP pump error' in DWT BWT PERMAQ Pico 10-90?
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  Kelli LoweAug 25, 2025
  An 'A1 HP pump error' on your DWT Water Filtration System can occur if the RO pump is defective, blocked, or has high current consumption, causing the motor protection relay to open. It can also happen if the motor protection relay isn't set to Auto reset, is defective, or is incorrectly wired. To resolve this: * Replace the faulty pump. * Have specialist personnel check the motor protection relay. * Check the wiring.
B
Brian MartinezAug 30, 2025
What to do if DWT BWT PERMAQ Pico 10-90 Water Filtration Systems shows 'A1 External hard stop'?
- J
  Jessica HallAug 30, 2025
  The 'A1 External hard stop' error on a DWT Water Filtration System can be triggered by several issues. The external water softener might be faulty, in regeneration, or delivering hard water. It can also be due to incorrect polarity set for the input contact, or a fault on the residual hardness measuring device. Another cause can be a defective residual hardness sensor. Here's how to address these potential causes: * Refill the salt water cabinet on the softener with regenerating salt. * Set the correct polarity. * Repair the cause of the fault on the external softener and then restart the RO device. * Refill the residual hardness analyser.

Summary

Information about the Installation and Operating Manual

Purpose of this Document

Explains the manual's role and importance for safe device operation.

Meaning of Symbols and Text Highlighting

Defines symbols and text conventions used in the document for clarity.

Meaning of Safety Symbols

Explains signal words and symbols used for hazard communication.

Target Group of this Document

Identifies intended users and their responsibilities for safe operation.

Warranty and Disclaimer

Outlines warranty conditions and disclaims liability for improper use.

Licensing Conditions

States copyright ownership and usage restrictions for the manual.

Manufacturer Information

Provides contact details and address of the manufacturer, BWT Wassertechnik GmbH.

Safety

General Safety Information

Provides essential safety information, warnings, and precautions for operating the device.

Intended Use

Defines the specific purpose of the BWT PERMAQ® Pico device and improper uses.

Impermissible Operating Methods

Lists prohibited operating methods to prevent damage and ensure safety.

Devices and Components

Description of Process

Explains the reverse osmosis process and system design for BWT PERMAQ® Pico devices.

Description of Process for the BWT PERMAQ Pico Vario

Details the specific process and features of the BWT PERMAQ® Pico Vario model.

Device Models

Lists and briefly describes the available BWT PERMAQ® Pico device variants.

Configuration Options

Presents a table detailing configuration options for different PERMAQ Pico models.

Scope of Delivery

Lists the components included in the delivery for various PERMAQ Pico models.

Overview of Components and Connections

Illustrates and identifies key components and connection points on the RO device.

Transport and Installation

Transport

Covers safety precautions and procedures for transporting the device to prevent tipping.

Transport Notice

Provides important notes and pictograms regarding the correct transport position of the device.

Installation

Details installation conditions, requirements, and the pre-treatment process.

Sample Installations

Illustrates typical installation configurations for BWT PERMAQ Pico Offline models.

Hydraulic Connection

Explains the hydraulic connection procedures for the device, excluding the Vario model.

Electrical Connection

Outlines safety precautions and requirements for the electrical connection of the device.

Commissioning

Test According to Accident Prevention Regulations

Specifies mandatory safety tests before commissioning new or modified equipment.

Putting the Device into Operation

Details the steps and checks performed by the BWT service team for commissioning.

Feed Water Requirements (Softened Water)

Lists the essential feed water quality parameters and limits for optimal device performance.

Control

Main Switch

Identifies the location and function of the main ON/OFF switch for the device.

Control Panel

Explains the operation and navigation of the device's display and control panel buttons.

Operation

Menu Overview

Lists the main menu options available for device operation and configuration.

Automatic Operation

Describes how the device operates automatically based on external request signals.

Interval Flushing

Explains interval flushing to prevent contamination during idle periods.

Service Menu

Details accessing and navigating the service menu for advanced settings and diagnostics.

Test Mode

Describes the test mode for troubleshooting, protected by password and for service personnel only.

Inspection Mode

Explains inspection mode for checking individual actuators, restricted to trained technicians.

Internal Disinfection;Chemical Cleaning

Outlines internal cleaning and disinfection procedures performed by the service team.

External Disinfection;Chemical Cleaning

Describes using external devices for disinfection and cleaning the system.

Alarms and Messages

Explains how alarms are triggered, displayed, and stored for troubleshooting.

Concentrate Regulation (BWT PERMAQ Pico FT, Pico Duo FT and Pico Vario only)

Details how to adjust concentrate flow for optimal yield and device function.

Setting Pressure Points (BWT PERMAQ Pico Vario only)

Guides on configuring pressure points for the Vario model's frequency converter.

Operation with Antiscalant Dosing System

Explains the setup and operation of the optional antiscalant dosing system.

Maintenance and Servicing

Performing Maintenance Work

Emphasizes professional execution of maintenance and recommends service agreements.

Replacing the Pre-filter

Provides step-by-step instructions for replacing the pre-filter element.

Disinfecting the RO Module

Details procedures for disinfecting the RO module using specific chemical agents.

Chemical Cleaning of the RO Module

Explains chemical cleaning to counteract deposits and maintain output.

Venting the High-Pressure Pump

Describes venting the pump for effective cleaning/disinfection.

Testing the Feed Water Hardness (DUROTEST Set)

Guides on using the DUROTEST® set to regularly test feed water hardness.

Changing the Antiscalant Dosing Container

Instructs on how to replace the antiscalant dosing container when alerted.

Alarms and Fault Elimination

Alarm Overview

Explains alarm categories, priorities, and how alarms are managed.

Troubleshooting for A1 Alarms

Provides causes and corrective actions for A1 (HARD STOP) alarms.

Troubleshooting for A2 Alarms

Details troubleshooting steps for A2 (SOFT STOP) alarms.

Troubleshooting for A3 Alarms

Lists causes and solutions for A3 (message) alarms.

Technical Data

Technical Data for the BWT PERMAQ Pico 10-90 on;off

Presents detailed technical specifications for the 10-90 on/off models.

Dimensions of the BWT PERMAQ Pico 10-90 on;off

Provides dimensional data and diagrams for the 10-90 on/off models.

Technical Data for the BWT PERMAQ Pico 40-90 HR on;off

Lists technical specifications for the 40-90 HR on/off models.

Dimensions of the BWT PERMAQ Pico 40-90 HR on;off

Shows dimensions and diagrams for the 40-90 HR on/off models.

Technical Data for the BWT PERMAQ Pico Duo 20;10-90;80

Presents technical data for the BWT PERMAQ® Pico Duo series.

Dimensions of the BWT PERMAQ Pico Duo 20;10-90;80

Provides dimensional data for the BWT PERMAQ® Pico Duo models.

Technical Data for the BWT PERMAQ Pico Vario 40-90 (HR)

Lists technical specifications for the BWT PERMAQ® Pico Vario models.

Dimensions of the BWT PERMAQ Pico Vario 40-90 (HR)

Shows dimensions for the BWT PERMAQ® Pico Vario models.

Decommissioning, Storage and Disposal

Decommissioning the Device

Details the procedure for taking the device out of operation.

Storing the Device

Outlines the proper storage conditions for the device and chemicals.

Putting the Device Back into Operation

Specifies that recommissioning must be done by the service team.

Disposal

Explains how to ensure professional and environmentally friendly disposal of the device.