Vertiv / Precision air conditioning

Liebert DME12MCP5 Precision Air Conditioner Equipment information & support

The Vertiv Liebert DME12MCP5 is a high-reliability direct expansion (DX) air-cooled precision air conditioner engineered for mission-critical IT infrastructure, featuring high airflow, low enthalpy difference cooling, an SHR ≥ 0.90, and an electronically commutated (EC) backward-curved centrifugal fan for continuous 24/7/365 thermal regulation.

Equipment information

Brand
Vertiv
Equipment model
Liebert DME12MCP5 Precision Air Conditioner
Equipment type
Precision air conditioning
Controller / software version
Confirm against the installed equipment
View full product specifications
Vertiv Liebert DME12MCP5 Precision Air Conditioner 12.5kW 380V-400V 3Ph (800×500×1950mm)

Information below comes from the current product catalogue. Confirm the controller, software version and configuration of the installed equipment separately.

Sensible Heat Ratio SHR
≥ 0.90 (High SHF)
Rated Cooling Capacity
12.5kW Nominal Sensible Cooling Capacity (High Airflow, Low Enthalpy)
Fan Drive Technology
Fully Digital Stepless Variable-Speed Inverter EC Centrifugal Fan
AC Operating Voltage
380V / 400V AC 3-Phase 50Hz/60Hz Auto-Sensing
Controller System
Liebert Intelligent Microprocessor Controller with Diagnostics & Teamwork
Refrigerant Type
R410A Eco-Friendly High-Pressure Refrigerant

Alarms & troubleshooting

HIGH_PRESSURE_ALARM / HP_TRIP
Controller Alarm Red LED solid, compressor locked out on high pressure
Outdoor condenser fouled/blocked, condenser fan failed, or refrigerant overcharged
1. Inspect outdoor condenser fins and clean dirt/dust with pressure washer;\n2. Verify outdoor condenser fan motor and speed controller operation;\n3. Measure discharge pressure and adjust refrigerant charge to design spec;\n4. Manually reset high-pressure switch and monitor startup current.
LOW_PRESSURE_ALARM / LP_TRIP
Controller Amber LED blinking, compressor shut down on low pressure
Refrigerant leakage, filter-drier clogged, expansion valve failure, or insufficient airflow
1. Inspect and clean/replace clogged indoor air filters;\n2. Verify indoor blower fan speed and airflow volume;\n3. Use an electronic leak detector to pinpoint copper joints/valves and repair;\n4. Evacuate system below 50Pa and recharge refrigerant according to nameplate.
AIRFLOW_LOSS / FAN_FAIL
Red LED solid with audible alarm, electric heaters and humidifier disabled
Differential air pressure switch open, fan belt snapped/slipping, or EC motor driver faulted
1. Inspect differential air pressure sensing tubes for blockages or disconnections;\n2. Examine fan drive belts and direct-drive motor bearings;\n3. Verify motor overload thermal relay status;\n4. Replace defective air pressure switch or blower motor assembly.

Access Complete Maintenance & Full Alarm Troubleshooting Manual

This page lists high-frequency critical alarm codes commonly encountered in field maintenance. Comprehensive manufacturer troubleshooting matrices, board-level repair guides, detailed electrical schematics, and firmware commissioning manuals are delivered alongside equipment upon formal project procurement, accompanied by dedicated FAE technical support.

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