---
title: Troubleshooting | LiqTech Service Knowledge Base and Quick Guides
description: Troubleshooting
---

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1. [LiqTech Service Knowledge Base and Quick Guides](https://www.go.liqtech.com/knowledgebase-quickguides)
2. [Troubleshooting](https://www.go.liqtech.com/knowledgebase-quickguides/troubleshooting)

# Troubleshooting

## FCV

- [How to calibrate an ABB regulation valve (FCV)](https://www.go.liqtech.com/knowledgebase-quickguides/how-to-calibrate-an-abb-regulation-valve-fcv)

## Transmitters

- [High Level Alarms or Low Level Alarms (Transmitter) – Initial Troubleshooting](https://www.go.liqtech.com/knowledgebase-quickguides/level-alarms-transmitter-initial-troubleshooting)
- [Transmitter Signal Fault – Initial Troubleshooting (4–20 mA)](https://www.go.liqtech.com/knowledgebase-quickguides/generic-troubleshooting-transmitter-faults-4-20-ma)

## valves

- [Valve Feedback Fault – Initial Troubleshooting](https://www.go.liqtech.com/knowledgebase-quickguides/generic-troubleshooting-valve-actuator-and-feedback-positioner)

## Pump

- [Pump Fault – Initial Troubleshooting (VFD / motor)](https://www.go.liqtech.com/knowledgebase-quickguides/generic-troubleshooting-pump-faults-vfd-/-motor)

## IO

- [Communication / Network Alarm – Initial Guidance](https://www.go.liqtech.com/knowledgebase-quickguides/communication-/-network-alarm-initial-guidance)
- [How to replace an Omron PLC I/O card](https://www.go.liqtech.com/knowledgebase-quickguides/how-to-replace-an-omron-plc-i/o-card)

## switches

- [High Level Switch – Initial Troubleshooting](https://www.go.liqtech.com/knowledgebase-quickguides/high-level-switch-initial-troubleshooting)

## Permeate

- [Assessing permeate quality issues and verifying potential membrane damage](https://www.go.liqtech.com/knowledgebase-quickguides/assessing-permeate-quality-issues-and-verifying-potential-membrane-damage)

- [Troubleshooting](https://www.go.liqtech.com/knowledgebase-quickguides/troubleshooting#main-content)

    - [FCV](https://www.go.liqtech.com/knowledgebase-quickguides/troubleshooting#fcv)
    - [Transmitters](https://www.go.liqtech.com/knowledgebase-quickguides/troubleshooting#transmitters)
    - [valves](https://www.go.liqtech.com/knowledgebase-quickguides/troubleshooting#valves)
    - [Pump](https://www.go.liqtech.com/knowledgebase-quickguides/troubleshooting#pump)
    - [IO](https://www.go.liqtech.com/knowledgebase-quickguides/troubleshooting#io)
    - [switches](https://www.go.liqtech.com/knowledgebase-quickguides/troubleshooting#switches)
    - [Permeate](https://www.go.liqtech.com/knowledgebase-quickguides/troubleshooting#permeate)
- [FAQs](https://www.go.liqtech.com/knowledgebase-quickguides/faqs#main-content)

    - [CIP](https://www.go.liqtech.com/knowledgebase-quickguides/faqs#cip)
    - [Alarm](https://www.go.liqtech.com/knowledgebase-quickguides/faqs#alarm)
- [Support](https://www.go.liqtech.com/knowledgebase-quickguides/support#main-content)

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- [Pool](https://www.go.liqtech.com/knowledgebase-quickguides/pool#main-content)

    - [Trouble Shooting](https://www.go.liqtech.com/knowledgebase-quickguides/pool#trouble-shooting)
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- [Crossflow](https://www.go.liqtech.com/knowledgebase-quickguides/crossflow#main-content)

    - [Trouble Shooting](https://www.go.liqtech.com/knowledgebase-quickguides/crossflow#trouble-shooting)

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