FRIULAIR ACT ES 20-500

Questions and Answers

J
Johnny AlvarezAug 5, 2025
Why is the compressor not working on my FRIULAIR Dehumidifier?
- C
  Carla SchwartzAug 5, 2025
  The compressor may not be working due to several reasons: * If ESS=YES, the Dew Point displayed on DMC51 might be sufficiently low, and the led is OFF, so the compressor is not active – wait for the temperature to become higher. * The compressor internal thermal protection might be activated – wait 30 minutes and then retry. * There might be an issue with the electric wiring – verify the electric wiring. * If installed, the KC relay could be faulty – replace it. * If installed, there might be a problem with the internal thermal protection, the start-up relay, the start-up capacitor, or the working capacitor.
J
Julie PerryAug 17, 2025
How to fix the condenser fan if it's not working on my FRIULAIR ACT ES 20-500 Dehumidifier?
- K
  Kara EllisAug 17, 2025
  If the condenser fan isn't working, check these potential causes: * Verify the electric wiring. * The PV pressure switch might be faulty – replace it. * For ACT ES 200-500 3phase models, a fuse (FU1-FU2 on the electric diagram) might have blown – replace it and check the dryer's operation. * If the fan still doesn't work after checking these, replace it.
C
Christopher JohnsonAug 22, 2025
How to troubleshoot a FRIULAIR ACT ES 20-500 with a DMC51 display that is not lit?
- K
  karenmcdanielAug 22, 2025
  If the DMC51 display is not lit, verify that the system is powered and check the electric wiring.
B
brian09Aug 28, 2025
What to do if the auxiliary circuit fuse blows (FU2) on my FRIULAIR ACT ES 200-500 3phase Dehumidifier?
- R
  Richard GayAug 28, 2025
  If the FU2 fuse on the electric diagram blows, replace it and then check the dryer for proper operation.
D
Dawn GomezNov 9, 2025
What to do if the dew point is too high on my FRIULAIR ACT ES 20-500?
- C
  Crystal HaleNov 10, 2025
  A high dew point in your FRIULAIR Dehumidifier can stem from various causes: * The compressor might not be working. * The DewPoint probe T1 may not be correctly detecting the temperature – ensure the sensor is pushed into the bottom of the probe well. * The ambient temperature could be too high, or the room aeration may be insufficient – provide proper ventilation. * The inlet air might be too hot or the inlet air pressure might be too low – restore nominal conditions. * The inlet airflow rate might be higher than the dryer's rate – reduce the flow rate to restore nominal conditions. * The condenser could be dirty – clean it. * The condenser fan may not be working. * The dryer might not be draining the condensate. * If ESS=YES, wait for the compressor to start, and the D...

Summary

Identification and Warranty

Identification Plate

The identification plate shows primary machine data and must be referred to when contacting the manufacturer.

Warranty Conditions

Covers faulty parts for 12 months from installation (14 from delivery), excluding travel expenses.

Safety Rules

Definition of Conventional Signs

Explains the meaning of various warning and informational signs used throughout the manual.

Safety Rules and Proper Use

Warnings

Highlights hazards associated with compressed air, electrical, and operational safety.

Proper Use of the Dryer

Defines the intended use of the dryer and user responsibilities for correct operation.

Installation

Pressure Equipment Directive Instructions

Instructions for safe operation of pressure equipment according to PED directive 97/23/EC.

Transport

Guidelines for safely moving the unit, recommending trolley use and upright position.

Storage

Recommendations for storing the dryer to protect it from weather and maintain its integrity.

Installation Site Requirements

Installation Site

Specifies requirements for the installation environment, including temperature, air quality, and clearance.

Installation Layout

Illustrates typical installation configurations (Type A and B) with key components.

Correction Factors for Air Flow

Correction Factors

Provides factors to adjust air flow capacity based on pressure, temperature, and DewPoint variations.

System Connections and Electrical

Compressed Air System Connection

Details on connecting the dryer to the compressed air system, emphasizing safety and piping support.

Electrical Connections

Guidance for qualified personnel on making electrical connections, including voltage tolerance and RCD suggestion.

Condensate Drain

Information on the electronic drainer, its operation, and connection requirements.

Start-up Procedures

Preliminary Operation Checks

Ensures operating parameters match nameplate values and checks dryer integrity before first start-up.

First Start-up

Step-by-step procedure for the initial start-up of the dryer after installation or shutdown.

Start-up and Shut Down

Details on starting and shutting down the dryer, including specific procedures for 3-phase models and remote control.

Technical Data: ACT ES 20-200

ACT ES 20-200 1;115;60 Technical Data

Table of technical specifications for ACT ES 20-200 models with 1/115/60 power.

Technical Data: ACT ES 20-500 (1;230;60)

ACT ES 20-500 1;230;60 Technical Data

Table of technical specifications for ACT ES 20-500 models with 1/230/60 power.

Technical Data: ACT ES 200-500 3 phase (3;460;60)

ACT ES 200-500 3 phase 3;460;60 Technical Data

Table of technical specifications for ACT ES 200-500 3-phase models with 3/460/60 power.

Technical Data: ACT ES 200-500 3 phase (3;575;60)

ACT ES 200-500 3 phase 3;575;60 Technical Data

Table of technical specifications for ACT ES 200-500 3-phase models with 3/575/60 power.

Technical Description: Control Panel

Control Panel

Illustrates the dryer-operator interface, showing control panels for different ACT ES models.

Technical Description: Dryer Operation

Operating Principle and Refrigerant Circuit

Explains the working principle, refrigerant circuit, and operation modes (eco and hot gas by-pass).

Technical Description: Flow Diagram

Flow Diagram

Diagram illustrating the compressed air and refrigerant gas flow paths within the dryer.

Technical Description: Key Components

Refrigerating Compressor

Description of the hermetically sealed compressor, its function, and protection features.

Condenser

Description of the condenser component, its construction, and cooling operation via a fan.

Filter Dryer

Explains the function of the filter dryer in eliminating impurities from the refrigerant circuit.

Capillary Tube

Description of the capillary tube as a metering device for refrigerant pressure reduction.

Alu-Dry Module

Description of the heat exchanger module housing air-to-air, air-to-refrigerant exchangers and condensate separator.

Technical Description: Valves and Heater

Hot Gas By-pass Valve

Explains the function of the hot gas by-pass valve and its adjustment during manufacturing.

Refrigerant Pressure Switches

Details on low-pressure (LPS), high-pressure (HPS), and fan control (PV) pressure switches.

Compressor Crankcase Heater

Description of the electrical heater installed to maintain oil temperature and prevent liquid hammering.

Technical Description: DMC51 Instrument

DMC51 Instrument Overview

Overview of the DMC51 electronic instrument, its controls, and indicators.

Switching Dryer On;Off

Instructions for switching the dryer on and off using the ON-OFF switch.

Displaying Operating Parameters

Guide on how to display dew point, compressor discharge temperature, hours, and energy saving percentage.

Technical Description: DMC51 Alarms and Warnings

Service Warnings

Explanation of service warning indicators, messages, and how to reset them.

Alarms

Explanation of alarm indicators, messages, and how to reset them, leading to dryer stop.

Technical Description: DMC51 Signals and Setup

Service Warning;Alarm Signal Operation

Describes the 12Vdc signal output for service warning or alarm conditions.

Changing Operating Parameters (Setup Menu)

Instructions for qualified personnel to access and modify dryer operating parameters via the setup menu.

Technical Description: Electronic Drainer and Troubleshooting Prep

Electronic Drainer

Description of the electronic drainer, its operation, and control panel indicators.

Troubleshooting Prerequisites

Essential safety checks and prerequisites before performing troubleshooting or maintenance.

Maintenance and Checks

Checks and Maintenance Schedule

Provides guidelines for daily, 200-hour/monthly, 1000-hour/yearly, and 8000-hour maintenance checks.

Troubleshooting: Display and Compressor Issues

Troubleshooting: Display and Compressor

Lists common symptoms, causes, and actions for display not lit or compressor not working.

Troubleshooting: Dew Point and Pressure Issues

Troubleshooting: Dew Point and Pressure

Troubleshooting for dew point too high/low, excessive pressure drop, and condensate drain problems.

Troubleshooting: Water, Thermal Protection, Valves

Troubleshooting for water in the line, compressor thermal protection activation, and solenoid valve issues.

Troubleshooting: Alarms and Indicators

Troubleshooting for alarms like Hdt, toC, ICE, and DMC51 status indicators.

Troubleshooting: Service Warnings

Troubleshooting for DMC51 service warnings (HdP, LdP, SrV) and how to reset them.

Spare Parts Information

Spare Parts Ordering

Information on ordering spare parts, emphasizing the need to quote data from the identification plate.

Maintenance and Dismantling

Refrigeration Circuit Maintenance

Guidelines for maintenance on refrigeration systems, emphasizing certified engineers and refrigerant recovery.

Dryer Dismantling

Instructions for dismantling the dryer into homogeneous groups of materials for disposal.

Attachments: Component Lists

Exploded Views Component List

Lists components for exploded views, identifying parts by number.

Electric Diagrams Component List

Lists components used in the electric diagrams, identifying parts by code.

Dryer Dimensions: ACT ES 20-50

ACT ES 20-50 Dimensions

Detailed dimensions and connection points for the ACT ES 20-50 model.

Dryer Dimensions: ACT ES 75

ACT ES 75 Dimensions

Detailed dimensions and connection points for the ACT ES 75 model.

Dryer Dimensions: ACT ES 100-150

ACT ES 100-150 Dimensions

Detailed dimensions and connection points for the ACT ES 100-150 models.

Dryer Dimensions: ACT ES 200-250

ACT ES 200-250 Dimensions

Detailed dimensions and connection points for the ACT ES 200-250 models.

Dryer Dimensions: ACT ES 300-350

ACT ES 300-350 Dimensions

Detailed dimensions and connection points for the ACT ES 300-350 models.

Dryer Dimensions: ACT ES 400-500

ACT ES 400-500 Dimensions

Detailed dimensions and connection points for the ACT ES 400-500 models.

Dryer Dimensions: ACT ES 200-250 3 phase

ACT ES 200-250 3 phase Dimensions

Detailed dimensions and connection points for the ACT ES 200-250 3-phase models.

Dryer Dimensions: ACT ES 300-350 3 phase

ACT ES 300-350 3 phase Dimensions

Detailed dimensions and connection points for the ACT ES 300-350 3-phase models.

Dryer Dimensions: ACT ES 400-500 3 phase

ACT ES 400-500 3 phase Dimensions

Detailed dimensions and connection points for the ACT ES 400-500 3-phase models.

Exploded Views

ACT ES 20-30 Exploded View

Exploded view diagram with numbered components for the ACT ES 20-30 model.

Exploded Views: ACT ES 50

ACT ES 50 Exploded View

Exploded view diagram with numbered components for the ACT ES 50 model.

Exploded Views: ACT ES 75

ACT ES 75 Exploded View

Exploded view diagram with numbered components for the ACT ES 75 model.

Exploded Views: ACT ES 100

ACT ES 100 Exploded View

Exploded view diagram with numbered components for the ACT ES 100 model.

Exploded Views: ACT ES 125-150

ACT ES 125-150 Exploded View

Exploded view diagram with numbered components for the ACT ES 125-150 models.

Exploded Views: ACT ES 200-250

ACT ES 200-250 Exploded View

Exploded view diagram with numbered components for the ACT ES 200-250 models.

Exploded Views: ACT ES 300-350

ACT ES 300-350 Exploded View

Exploded view diagram with numbered components for the ACT ES 300-350 models.

Exploded Views: ACT ES 400-500

ACT ES 400-500 Exploded View

Exploded view diagram with numbered components for the ACT ES 400-500 models.

Exploded Views: ACT ES 200-250 3 phase

ACT ES 200-250 3 phase Exploded View

Exploded view diagram with numbered components for the ACT ES 200-250 3-phase models.

Exploded Views: ACT ES 300-350 3 phase

ACT ES 300-350 3 phase Exploded View

Exploded view diagram with numbered components for the ACT ES 300-350 3-phase models.

Exploded Views: ACT ES 400-500 3 phase

ACT ES 400-500 3 phase Exploded View

Exploded view diagram with numbered components for the ACT ES 400-500 3-phase models.

Electric Diagrams

ACT ES 20-100 Electric Diagram

Electric diagram for ACT ES 20-100 models, showing wiring and component connections.

Electric Diagrams: ACT ES 125-150

ACT ES 125-150 Electric Diagram

Electric diagram for ACT ES 125-150 models, showing wiring and component connections.

Electric Diagrams: ACT ES 200-250

ACT ES 200-250 Electric Diagram

Electric diagram for ACT ES 200-250 models, showing wiring and component connections.

Electric Diagrams: ACT ES 300-350

ACT ES 300-350 Electric Diagram

Electric diagram for ACT ES 300-350 models, showing wiring and component connections.

Electric Diagrams: ACT ES 400-500

ACT ES 400-500 Electric Diagram

Electric diagram for ACT ES 400-500 models, showing wiring and component connections.

Electric Diagrams: ACT ES 200-500 3 phase (Sheet 1)

ACT ES 200-500 3 phase Electric Diagram (Sheet 1)

First sheet of the electric diagram for ACT ES 200-500 3-phase models.

Electric Diagrams: ACT ES 200-500 3 phase (Sheet 2)

ACT ES 200-500 3 phase Electric Diagram (Sheet 2)

Second sheet of the electric diagram for ACT ES 200-500 3-phase models.

Electric Diagrams: ACT ES 200-500 3 phase (Sheet 3)

ACT ES 200-500 3 phase Electric Diagram (Sheet 3)

Third sheet of the electric diagram for ACT ES 200-500 3-phase models.