American Power Conversion Central Air Conditioning System manual Troubleshooting

Page 73

Troubleshooting

Problem

Possible Cause

Corrective Action

 

 

 

Controls are erratic

• Incorrect secondary voltage.

• Ensure that the control transformer secondary

or inoperative

 

voltage is within +/- 10% of 24 VAC.

 

• Remote shutdown input is

• Check the event log for an entry in the log that

 

cycling the Module on and

indicates remote shutdown activity.

 

off.

 

 

 

 

Evaporator motor

• Control circuit breaker is

• Reset the control circuit breaker.

fails to start

tripped.

 

 

• Frequency Drive is in an

• Check the event log for a VFD alarm entry.

 

alarm condition or has failed.

Replace the frequency drive.

 

 

 

Humidifier

• Humidifier circuit breaker

• Check for short circuit. Reset the circuit breaker.

inoperative

tripped.

 

 

• Water supply strainer may be

• Remove and clean the strainer.

 

clogged.

 

 

• Improper water supplied to

• For proper operation, the humidifier requires a

 

humidifier.

regular water supply. Any treated water

 

 

(demineralized, softened, or ionized water) will

 

• Non-essential lockout has

result in improper humidifier operation.

 

• Review the event log to see if this alarm input has

 

been activated by a user-

been activated.

 

defined input with the

 

 

equipment.

 

Reheat elements

• Circuit breaker is open.

inoperative

• Non-essential lockout has

 

 

been activated by a user-

 

defined input with the

 

equipment.

•Check for direct short circuits. Reset the circuit breaker.

•Review the event log to see if this alarm input has been activated.

Airflow too Low

• External static pressure is too

 

high.

 

• The pressure drop across the

 

chilled water coil is below

 

the recommended value.

 

• Cooling setpoint is too low.

•Try to compensate by increasing the blower speed to match recommended coil pressure drops.

•Raise the Module to the minimum height or add duct transitions to direct the air across the floor.

•Check the chilled water coil pressure drop through the display interface. Pressure should match recommended pressure drops indicated on the chart based on Module size. If the pressure drop is below the recommended settings, increase the blower speed until the pressure drop matches the recommended setting. See “Calibrate airflow manually” on page 17.

•Verify that the cooling setpoint is not below 68° F (20° C).

NetworkAIR IR Operation, Maintenance, and Troubleshooting

67

Page 72 Page 74
Image 73
Page 72 Page 74
Contents NetworkAIR IR Precision Air Conditioner Page Contents Set Up Alarms Network Management Card Maintenance Display Interface OperationScrolling status screens Using the DisplayNavigating the interface Main menu screenChange settings Password entryStart the System Stop the System System Options Set Up System ConfigurationOperation Set Up System Configuration System Delays Building management Sensor setupOptions for Fluid-Cooled Modules Fluid-Coil Type Applicable SettingsActuator Types Valve TypesCoil Fluid Temp Activation Threshold and Deadband Input contacts Set Up Contacts and RelaysMap Description/Function Output relaysOperation Set Up Contacts and Relays Configure Module Set Up Module ConfigurationAlarm detectors Calibrate airflow manually Set Up Module ControlCalibrate airflow automatically Reset humidifier Reset variable frequency driveSet up Humidifier Reset compressors How the modes work Control the EnvironmentSetpoints Modes DeadbandsEssential Functions PID controls Loop Behavior PID Tuning Correction How to tune the PIDsHumidification sensitivity Temperature alarms Set Up AlarmsHumidity alarms Maint intervals Alarm delayCoil fluid thresholds Group config Set Up GroupSys failure events Group settingsOperation Set Up Group Password & Time-out Set Up the DisplayTemperature & pressure units Date and timeHow to update the firmware Adjust displayProduct data Reset to defaultsNetwork config Set Up Network ConfigurationModule status View Status ReadingsSystem status View Event Log Group statusView Log Major or minor alarm LEDs Respond to AlarmsView active alarms Control beeperReset sys failure Clear active alarmsDisplayed Alarm Message Action Required Alarm messages and suggested actionsDisplayed Alarm Message Action Required Check that the # Systems setting Path Main Setup Group Group Module Module in which the alarm occurred Module Control Displayed Alarm Message Action Required Displayed Alarm Message Action Required Page Overview Quick ConfigurationAPC Device IP Configuration Wizard TCP/IP configuration methodsBootp & Dhcp configuration Network Management Card Quick Configuration Option 43 = 01 04 31 41 50 Local access to the control console Control console Remote access to the control consoleNetwork Management Card Quick Configuration Web interface How to Access a Configured UnitTelnet/SSH Snmp FTP/SCP How to Recover From a Lost Password How to Upgrade Firmware Upgrade the AOS. For example Page Environment Monthly Preventive MaintenanceMechanical CleanlinessElectrical Record the amperages for the following components Quarterly Preventive MaintenanceFunctional tests Semi-Annual Preventive Maintenance Page Troubleshooting Troubleshooting Semi-Annual Preventive Maintenance Problem Possible Cause Corrective Action Page Terms of warranty Limited Product Warranty for APC ProductsAPC product covered Drawings, descriptions Assignment of warrantiesExclusions Limited Product Warranty for APC Products Claims Warranty ProceduresLabor Parts Page Page APC Worldwide Customer Support

Central Air Conditioning System specifications

American Power Conversion (APC) is renowned for delivering innovative solutions in the realm of power management, but its contributions don't stop there. The company has also made significant advancements in central air conditioning systems. Featuring cutting-edge technologies and energy-efficient designs, their HVAC systems are tailored to meet modern needs while ensuring comfort and sustainability.

One of the standout features of APC central air conditioning systems is their variable speed compressor technology. This advanced system operates at different speeds rather than just cycling on and off. By adjusting the compressor speed to match the cooling demand, these systems optimize energy consumption, leading to lower electricity bills and extended equipment lifespan.

APC's systems also incorporate smart thermostat capabilities, allowing homeowners to monitor and control their air conditioning remotely. Through a mobile app, users can adjust temperature settings, create schedules, and receive maintenance alerts, all of which enhance convenience and efficiency. Furthermore, these smart thermostats can learn user habits over time, automatically adjusting temperature settings to maximize comfort and savings.

Another key characteristic of APC central air conditioning systems is their commitment to eco-friendly refrigerants. Utilizing low global warming potential (GWP) refrigerants, these systems minimize the environmental impact while maintaining high-performance standards. With energy efficiency ratings that often exceed industry benchmarks, APC systems contribute to reduced greenhouse gas emissions and help homeowners adopt sustainable practices.

The design of APC air conditioning units is also noteworthy. They are constructed with durable materials that withstand various weather conditions, ensuring reliability during the hottest months. Additionally, the streamlined design of these systems enhances aesthetic appeal, making them a suitable choice for modern homes.

In conclusion, the American Power Conversion central air conditioning system exemplifies the synergy of innovative technology, energy efficiency, and user-friendly features. With variable speed compressors, smart controls, eco-friendly refrigerants, and robust construction, APC provides homeowners with a dependable and sustainable climate control solution. As demand for energy-efficient products continues to grow, APC is poised to lead the way in intelligent air conditioning solutions that prioritize both comfort and environmental responsibility.
Top Page Image Contents