What to do if the Vertiv Liebert PEX3 DX humidification is ineffective due to humidifier main power failure?
If the Vertiv Air Conditioner's humidification is ineffective, verify if the humidifier MCB is closed. When the humidifier contactor is closed, check that the L1, L2, and L3 voltages are normal.
What to do if Vertiv Liebert PEX3 DX Air Conditioner humidification is ineffective due to air flow lose switch failure?
If the Vertiv Air Conditioner's humidification is ineffective, check if the air flow lose switch connection is normal. After startup, examine whether there is 24 Vac voltage between P36-7 and P36-4; if not, check if the air flow lose switch is damaged.
Why is humidification ineffective in my Vertiv Air Conditioner, and the humidification contactor does not close?
If the humidification in your Vertiv Air Conditioner isn't working, it could be due to the humidification contactor not closing. First, inspect the contactor itself and then check the circuit voltage of the contactor. Also, check the opened safety devices of the infrared humidifier: Water pan over-temperature protection switch and lamp over-temperature protection switch. If manual reset or adjustment is reached, the contractor does not close. Use a jumper to shot terminals P35-1 and P35-2. If the contactor is closed, replace the series-connected safety device, and remove the jumper.
What to do if Vertiv Liebert PEX3 DX humidification is ineffective and there is no water in water pan?
If the Vertiv Air Conditioner's humidification is ineffective, it may be due to no water in the water pan. Check the water supply, ensure the water supply solenoid valve is working, verify the state of the high water-level switch and water level regulator, and confirm the water supply pipe is not clogged.
General| Brand | Vertiv |
|---|---|
| Model | Liebert PEX3 DX Series |
| Category | Air Conditioner |
| Language | English |
Introduction to the Liebert PEX3 series and description of its models and appearance.
Explanation of the 25-digit model nomenclature for the Liebert PEX3 series.
Overview of main components including indoor unit parts, condenser, and software.
Details on optional components like humidifiers, heating, dual power, sensors, and detectors.
Specifies the required refrigerant quality and quantity for optimal unit performance.
Provides tables for standard refrigerant charges for air-cooled and water-cooled units.
Outlines the necessary storage and operating environment requirements for the unit.
Procedures for unit transportation, unpacking, and inspection before installation.
Preparing the site, equipment room, space, and tools for unit installation.
Detailed steps for mechanical installation of unit components.
Provides dimensions and operational weights for various indoor unit models.
Specifies dimensions for plenums and air outlets on upflow units.
Details condenser specs and base plate cut-out positions.
Instructions for installing the indoor unit and its floor stand.
Guidance on pipe installation for air-cooled and water-cooled units.
Procedures for lowering fans and removing compressor fixing plates.
A checklist for verifying the correctness of the installation before proceeding.
Guidance on electrical installation precautions, wiring, and checks.
Essential precautions to follow during the electrical installation process.
Information on wiring within the electrical control box.
Instructions for connecting control cables and condenser wiring.
Instructions for connecting sensors, alarms, and remote shutdown.
A checklist for final inspection of electrical installation before powering on.
Overview of the Liebert iCOM touchscreen, its interface, and features.
Explanation of the status dial, its sections, and background color indications.
Controls for accessing user/service settings, login, and menu navigation.
Procedures for viewing and editing setpoints, managing alarms, and logs.
Description of the LCD screen and the functions of the button and indicator panel.
How to navigate start-up, main interfaces, and user menus.
Managing passwords, setpoints, alarms, and display settings.
How to view the event log and display temperature/humidity graphs.
Managing component run hours, sleep mode, and viewing active alarms.
Provides contact information for customer service personnel.
Introduces the IS-UNITY-DP card supported by Liebert PEX3.
Procedures for commissioning the host communication component.
Instructions for assigning an IP address to the communication card.
Steps for connecting a computer to the card using an Ethernet cable.
Guide for connecting an RS-485 serial cable for communication.
Lists monthly and semi-annual inspection items for system function and component wear.
Self-diagnostic functions and procedures for checking electrical connections.
Visual inspection and functional testing of controller components.
Maintenance guides for condensers and the unit's dust filter.
Steps for maintaining the infrared humidifier and electric heater.
Troubleshooting guide for EC fan issues.
Troubleshooting guide for humidification issues like ineffective operation.
Specific troubleshooting steps for common infrared humidifier faults.
Information about the high-temperature switch and its reset function.
Diagnosis for compressor issues, resistance checks, and system faults.
Troubleshooting guide for issues with the heating system.
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