Emerson MINI-MATE2 user manual Troubleshooting

Page 70

Troubleshooting

11.0TROUBLESHOOTING

Table 25 Troubleshooting

Symptom

Possible Cause

Check Or Remedy

 

 

 

 

No power to unit

Check voltage at input terminal block.

 

 

 

 

Control voltage circuit breaker (at

Locate short and reset circuit breaker.

 

transformer) open

 

 

 

Float switch relay closed

Has rubber band been removed from float switch? Check drain

Unit will not start

because of high water in the

and line. Access through left panel. Power must be cycled at the

 

condensate pan

disconnect to reset.

 

 

Check terminal TB1-4 and TB1-5 for jumper or N/C contact.

 

Jumper not in place

Check pins 1-8 and 1-9 for jumper or N/C high temperature

 

sensor contact. Check pins 5-4 and 5-5 for jumper or N/C smoke

 

 

 

 

sensor contact.

 

 

 

 

Cooling not displayed at the

Adjust TEMP control set point and sensitivity to require cooling.

 

control panel

 

 

 

Short cycle prevention control

Control software delays compressor 3 minutes cooling, from stop

 

to start

 

 

 

Compressor contactor not pulling

Check for 24 VAC ± 2 VAC at terminals P4-8 and P4-4. If voltage,

 

check contactor. If no voltage at P4-8 and P4-4, check at

No cooling

in

terminals P2-3 and P2-8. If voltage, check freeze stat.

 

 

 

 

Compressor high head pressure

See below for cause.

 

 

 

 

Plugged filter/dryer

Replace filter/dryer

 

 

 

 

 

Check pressure gauges. At low ambient temperatures, proper

 

Low refrigerant charge

refrigerant charge is very important on units with Lee-Temp

 

 

receivers.

 

Insufficient air flow across

Remove debris from coil and air inlets.

 

condenser coil

Compressor high

 

Water/Glycol Cooled only: No

 

head pressure

Check fluid supply to regulating valve. Adjust valve if necessary.

fluid flowing through condenser

 

 

 

 

 

 

Condenser fan not operating

Check fan operation.

 

 

 

 

DIP switch not set to enable

See DIP switch settings Table 24.

 

humidifier option

 

 

 

“HUMIDIFY” not displayed at

Increase humidity control set point and sensitivity to require

 

control panel

humidification.

 

 

Check voltage at P3-1 and P1-9 on interface board for 24 VAC

 

Defective board

± 2 VAC. If no voltage, check wiring and/or replace board. Check

 

 

wiring from control panel to board.

Humidifier does

 

 

 

Humidity display will indicate dashes. Check wiring from

not operate

Failed humidity sensor

temperature/humidity board to the control board and from the

 

wall box to the control board. Replace wallbox or

 

 

 

 

temperature/humidity circuit board (if remote).

 

 

 

 

 

Make sure switch is in Run position. Check humidifier water

 

No water flow

supply (including filter screen) and check nylon overflow line if

 

 

canister is full.

 

Canister fill rate is not keeping up

Check fill valve screen opening and capillary tube for

 

with the steam output

obstructions. Check water supply pressure (minimum 10 PSIG).

 

DIP switch not set to enable

See DIP switch settings Table 24.

 

reheat option

 

 

 

HEAT not displayed at the

Increase temperature set point to require heating.

Reheat will not

control panel

 

operate

 

 

Reheat safety open, defective

Check voltage at P2-1 and P1-9 on interface board for 24 VAC ±

 

2 VAC. If voltage, check reheat contactor and reheat safety. If no

 

reheat contact or defective board

 

voltage, check wiring and/or replace board.

 

 

 

 

 

 

Element is burned out

Turn off power. Check element continuity with an Ohmmeter.

 

 

 

Liebert® Mini-Mate2™

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Contents Liebert Mini-Mate2 Page Table of Contents Microprocessor Control System Performance Microprocessor ControlsAlarms System OPERATION, Testing and MaintenanceTables Important Safety Instructions Liebert Mini-Mate2 Product Model Information Air-cooled systems-indoor centrifugal condensing unitsPFH 0 67 a a L System configurations-60 Hz System configurations-50 HzIntroduction Condensing Unit Section-Split System Standard FEATURES-5 TON SystemsEvaporator Section-Split System Chilled Water UnitsOther Standard Control Features System ControlsHumidifier Switches and MotorsReheat SensorsOptional Configurations-Water/Glycol Condensing Units Optional Configurations-Prop Fan Condensing UnitsFree-Cooling Optional Configurations-Chilled Water Units SHIP-LOOSE ACCESSORIES-FIELD-INSTALLED Ship-Loose Accessories-Field-Installed Site Preparation and Installation Installation ConsiderationsRoom Preparation Location Considerations Air-cooled systemsCooling Drycooler Ceiling Unit WeightsUnit weights Cooling UnitsEquipment Inspection Upon Receipt Installing the Ceiling UnitsClose Coupled Installations Evaporator Air Distribution Filter BoxHumidifier Water Supply Line Connections for Ducted SystemsPiping Connections and Coolant Requirements Drain Line Evaporator external static pressureEquivalent Pipe Liquid Suction Length, ft m Recommended refrigerant line sizesEquivalent lengths for various pipe fittings, ft m Copper PipeVertical rise above evaporator/maximum Pipe length and condenser elevation relative to evaporatorVertical fall below evaporator Refrigerant charge Total refrigerant = Units and LinesQuick Connect Fittings Line charges refrigerant per 100 ft m of Type L copper tubeDPN000218 Threaded rod and hardware kit installation Electrical ConnectionsPower Connections Control ConnectionsEvaporator unit electrical connections Close coupled installation General Considerations Piping ConnectionsDucting Considerations for Specific ApplicationsAIR-COOLED Dimensional Data AIR Cooled AIR-COOLED Weight, lb kg Outdoor Air-Cooled Condensing Unit InstallationModel # 60Hz 50Hz Rev Condensing Unit Fluid Requirements Water/Glycol Piping ConsiderationsRegulating Valve WATER/GLYCOL Dimensional Data WATER/GLYCOL DPN000214 Hot Water Reheat Coil Optional free-cooling coil 3-way valve on water/glycol unitsChecklist for Completed Installation Feature Overview Microprocessor ControlMain Menu Menu SetpointsTime Active AlarmsStatus DateShow DIP Switch Setup OperationRestart Time Delay 2 C/F DegreesFunction Default Range Change PasswordsSetup functions, default values and allowable ranges Calibrate SensorsCommon Alarm Enable Alarm EnableAlarm Time Delay Alarm default time delaysCustom Text Custom AlarmsStandard Custom Alarm Messages LCD Display ContrastEquipment switch settings unit control board Run Diagnostics Available On Rev 1.001.0 and higherEquipment Options Switches Switch settings wall box boardTest Outputs Test Control BoardControl menu Control board-inside evaporator Wall box boardHumidity Control Temperature ControlSystem Performance Microprocessor Controls Humidification Operation Load Control FeaturesCommunications Custom Alarms Alarms Definitions and TroubleshootingAlarms High Head PressureHigh Water Alarm TemperatureHumidifier Problem Alarm Air-Cooled SystemsOptional/Custom Alarms Maintenance and Component Operation System TestingSystem OPERATION, Testing and Maintenance Blower Removal Blower SystemAir Distribution Refrigeration SystemThermostatic Expansion Valve Glycol Solution MaintenanceDischarge Pressure Air-Cooled Condensing UnitsHot Gas Bypass Hot gas bypassMechanical Failure Replacement ProceduresCompressor Replacement Electrical FailureReplace a Failed Compressor Steam Generating Humidifier-Operation Procedures Replacing the Humidifier Canister Humidifier Circuit Board AdjustmentsHumidifier control board DIP switch settings AmpsMaintenance Inspection Checklist Troubleshooting TroubleshootingShort Symptom Possible Cause Check Or Remedy Cooling cycle tooDisplay Problem Display freezesTwor k Ne tPpor t Is t Care

MINI-MATE2 specifications

The Emerson MINI-MATE2 is a cutting-edge temperature and pressure monitoring device specifically designed for the needs of the refrigeration and HVAC industries. Known for its reliability and user-friendly interface, this compact unit serves as a key tool for technicians and facility managers looking to optimize system performance while ensuring compliance with safety standards.

One of the main features of the MINI-MATE2 is its advanced digital display, which allows users to easily monitor and interpret temperature and pressure readings in real-time. Its highly responsive sensors ensure accurate data collection, vital for maintaining optimal operating conditions. Moreover, the device supports a wide range of refrigerants, making it versatile for different applications, from walk-in coolers to commercial refrigeration systems.

The MINI-MATE2 utilizes state-of-the-art technology to enhance efficiency and performance. Equipped with Bluetooth connectivity, it allows for wireless communication with mobile devices, enabling technicians to track readings and receive alerts remotely. This feature not only improves convenience but also helps in quick decision-making, ensuring timely interventions when anomalies are detected.

Another significant characteristic is its robust construction. Built to withstand harsh environments, the MINI-MATE2 features a durable casing that protects it from physical impacts and environmental factors. This resilience ensures longevity, making it a cost-effective investment for any facility.

In addition, the MINI-MATE2 is designed with user-friendliness in mind. Its intuitive interface means that even technicians with limited experience can easily navigate its functionalities. Quick setup and straightforward operation allow for rapid adoption and extensive use in a variety of settings.

Finally, the MINI-MATE2 also includes built-in data logging capabilities. Users can record historical data for analysis and reporting purposes, which is essential for performing trend analysis and identifying potential issues before they escalate. By providing a comprehensive overview of system performance, the MINI-MATE2 empowers users to make informed decisions that can lead to improved energy efficiency and reduced operational costs.

Overall, the Emerson MINI-MATE2 is an indispensable tool for modern refrigeration and HVAC applications, combining cutting-edge technology, user-friendly design, and essential features to support efficient system management.
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