NetworkAIR ™ IR Precision Air Conditioner In-row Operation, Maintenance, and Troubleshooting
Contents Operation ................................................................1 Display Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Using the Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Scrolling status screens . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Main menu screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Navigating the interface . . . . . . . . . . . . . . . . . . . . . . . . . . .
Set Up Module Control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Calibrate airflow manually . . . . . . . . . . . . . . . . . . . . . . . . 17 Calibrate airflow automatically . . . . . . . . . . . . . . . . . . . . . 17 Reset variable frequency drive . . . . . . . . . . . . . . . . . . . . . . 18 Reset humidifier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 Set up Humidifier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 Reset compressors . . . . . .
View Status Readings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 Scrolling status screens . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 Module status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 System status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 Group status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 View Event Log . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 View Log . .
Maintenance ......................................................... 61 Monthly Preventive Maintenance . . . . . . . . . . . . . . . . . . . . . . . 61 Environment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61 Cleanliness . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62 Mechanical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62 Electrical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operation Display Interface Item Function ! Major Alarm LED When red, a major alarm condition exists. " Minor Alarm LED When yellow, a minor alarm condition exists. # Check Log LED When yellow, at least one new major alarm, minor alarm, or event has occurred. $ Status LED When green, the Module is on. % Liquid Crystal Display (LCD) View alarms, status data, instructional help, and configuration items. & Up and down arrow keys Select menu items and access information.
Using the Display The first time you apply power to the NetworkAIR IR In-row Precision Air Conditioner the display initializes and runs an LED and alarm-tone test. Scrolling status screens After start-up, the interface displays the firmware revision number (if the fast start-up is disabled). The display interface then scrolls automatically and continuously through nine screens of status information.
Operation: Using the Display Main menu screen On any top-level status screen, press the ENTER or ESC key to open the main menu screen. Note If the display interface is inactive for ten minutes (the default delay), it returns to the scrolling status screens. To change this delay, use the timeout setting under the Password menu. Navigating the interface Selector arrows. Press the up or down arrow key to move the selector arrow ! to a menu option or setting.
Operation: Using the Display Password entry The Module has two levels of password protection: • User password for users who need to change basic and environmental settings • Service password for users who need to modify settings that control the components in the Module or change advanced options When you try to change any of the settings, the display prompts you to enter your password. The default value for both the User and Service password is APC (upper case).
Operation: Using the Display Stop the System Path: Main Menu > On/Off To stop the System, select the On/Off option on the main menu and change the setting to Off. Change the setting to Off to shut down all modes of operation and the blower fan; the display and the controller continue to receive power. Note For Systems with electric reheat, the blower fans may continue to operate for up to 60 seconds to purge heat from the System.
Set Up System Configuration The System configuration options are set at the factory and may be modified during the commissioning of the Modules in the System. Changing the settings incorrectly can cause serious malfunctions and damage to your System. Only qualified service personnel should make changes to these settings. Not all the System configuration settings apply to the NetworkAIR IR In-row Precision Air Conditioner.
Operation: Set Up System Configuration # PCIOMs. Set the number of Programmable Customer Input/Output Modules (PCIOMs) installed in the user interface box. This setting controls the number of input contacts and output relays available in the Input/Output menu. See “Set Up Contacts and Relays” on page 13 to set up the contacts and relays from the display interface. See the Installation Manual to connect the contacts and relays to the Main Module. # Modules in Sys.
Operation: Set Up System Configuration System Delays Path: Main > Setup > System # > System Config > System Delays The System delays protect the Modules in the System from excessive wear and damage, and keep the modes from working against each other. Comp Min ON. The Comp Min ON setting does not apply to Systems without compressors. For Systems with compressors (direct expansion), the delay begins when the compressor engages, and then prevents the compressor from disengaging until the delay has expired.
Operation: Set Up System Configuration Building management Path: Main > Setup > System # > System Config > Building Management If you are using a building management system with your NetworkAIR IR In-row Precision Air Conditioner, you must set the following values: Address. The address of the Main Module on the RS-485 bus for a building management system. Baud Rate. The bus speed for the RS-485 bus. Parity. The parity for the RS-485 bus. Stop Bits. The stop bits for the RS-485 bus.
Options for Fluid-Cooled Modules Water-cooled Modules have settings for the valves and piping needed to accommodate the heat of rejection method. The NetworkAIR IR In-row Precision Air Conditioner provides cooling by using a fluid coil without a compressor. The following settings apply to each type of fluid-cooled Module.
Operation: Options for Fluid-Cooled Modules Valve Types Path: Main > Setup > System # > System Config > Valve Types Set the type of valves installed in your piping system. Each valve can be either two-way or three-way. Economizer-equipped Systems use three-way valves. Flow Switch. Set the location of the optional flow switch in this System. The flow switch detects whether there is adequate liquid coolant (water) flow to maintain coil operation.
Operation: Options for Fluid-Cooled Modules Coil Fluid Temp Activation Threshold and Deadband Path: Main > Setup > System # > System Config > Coil Fluid Options The selections for Coil Fluid Options help control the optional MultiCool coil or Economizer coil in equipped Systems. Set the temperature threshold and deadband for using the MultiCool coil or the Economizer coil.
Set Up Contacts and Relays The System can monitor external contact closure events. Possible applications include: • Magnetic contact switches • Window foil • Tamper switches • Heat detectors • Water sensors • Pressure sensors • Building smoke and fire detection systems You can set input contacts to cause alarm conditions based on their current state and a user-defined normal state. Output contacts can map internal alarms and events to outside devices.
Operation: Set Up Contacts and Relays Action. Set the System controller to respond to the change of status for an input in one of the following ways: Map Description/Function Status Only Displays the event on the Active Alarms screen. Status-only events are not logged. Minor Alarm Activates the Warning LED and the alarm beeper. It also creates an entry in the event log. Major Alarm Activates the Alarm LED and the alarm beeper. It also creates an entry in the event log.
Operation: Set Up Contacts and Relays Action. The Action field changes as you scroll through the list of events that can be mapped to this relay. Remove indicates that the event is already associated with this relay. Add indicates that the event is not associated with this relay. Press the ENTER key and change the setting to map the displayed event to this relay or remove the displayed event from the list of events mapped to this relay. Normal. Set the normal state for this relay.
Set Up Module Configuration The Module configuration settings help the controller determine which components are available and how the Module should operate. The settings in the Module Configuration menu are defined at the factory. Changing the settings incorrectly can cause serious malfunctions and damage to your System. Only qualified service personnel should make changes to these settings.
Set Up Module Control The Module Control options are configured and tuned during the commissioning of each Module. The settings in the Module Control menu are defined at the factory. Changing the settings incorrectly can cause serious malfunctions and damage to your System. Only qualified service personnel should make changes to these settings. Calibrate airflow manually Note The System must be on and the blowers operating to calibrate the airflow manually.
Operation: Set Up Module Control Reset variable frequency drive Paths: Main > Setup > Module > Main Module > Module Control > Reset VFD # Main > Setup > Module > Expansion Module > Module Control > Reset VFD # The Reset VFD option resets the variable frequency drive (VFD). The drive shuts down during a VFD # Fault Tolerance Exceeded alarm. The alarm occurs when the VFD detects three faults within thirty minutes. Use this function to restart the drive manually when the alarm condition is resolved.
Operation: Set Up Module Control Reset compressors Paths: Main > Setup > Module > Main Module > Module Control > Reset Compressors Main > Setup > Module > Expansion Module > Module Control > Reset Compressors The Reset Compressors option resets the compressors after an alarm. The compressors shut down during a Suction Pressure Low alarm. Use this function to restart the compressors manually when the alarm condition is resolved. Low Suction Pressure alarms indicate a problem with the refrigeration system.
Control the Environment The System controls the room environment by engaging one of four modes: Cool, Dehumidify, Reheat, or Humidify. These modes may work differently depending on the options and equipment installed in your Modules. The environmental controls are set when your System is installed. Changing settings described in this section after the system has been commissioned may result in improper operation. How the modes work Cool.
Operation: Control the Environment Dehumidify. Dehumidify mode is controlled by the dehumidify PID controller. The PID controller adjusts the output as required to maintain the temperature at the setpoint. See “PID controls” on page 23 for a description of the PID controls and instructions on tuning the dehumidify PID loop. Humidify. The steam cylinder humidifier output is controlled by the humidify proportional controller.
Operation: Control the Environment Deadbands Path: Main > Control Environment > Deadbands The deadband is the sensitivity range for a setpoint. It is the value above or below the setpoint at which the mode outputs at full capacity. Acceptable deadband ranges include: • Cool: 0.5–10.0° F (0.28 –5.6° C) • Reheat: 0.5–10.0° F (0.28–5.6° C) • Dehumidify: 1–10% Relative Humidity • Humidify: 1–10% Relative Humidity Modes Path: Main > Control Environment > Modes Enable and disable the modes of operation.
Operation: Control the Environment PID controls Path: Main > Setup > System # > System Config > PID Controls The Proportional plus Integral plus Derivative (PID) loop is used to control the output of the cool, reheat, and dehumidify modes. Choose which mode or actuator PID loop to tune, using the 01of03: [Mode/Actuator name] setting. Mode. Choose the multipliers to use in the PID algorithm. You can omit the derivative or the integral and derivative multipliers in the algorithm. P.
Operation: Control the Environment How to tune the PIDs A qualified service technician must tune the PID loops to optimize the performance of each mode. The units shown are for temperature. In the dehumidify loop, the units are in percent relative humidity (%RH). The PID loops must be tuned after the equipment in the room is installed and running. The loops should be tuned periodically to account for changes in the room load. 1. Select the PID loop to tune. 2.
Operation: Control the Environment Humidification sensitivity Path: Main > Setup > System # > System Config > Humid. Sensitivity Humid. Sensitivity. The humidifier sensitivity band is the percentage of relative humidity below the humidify setpoint at which the humidifier operates at full output.
Set Up Alarms Set alarms to alert you to abnormal temperatures or humidity levels and the number of hours certain components have been in operation. Alarms will also alert you to malfunctions; however, malfunction alarms are not user-definable. See “Respond to Alarms” on page 38 to correct these conditions. Preset alarm-threshold default values are applicable for most precision air conditioning applications.
Operation: Set Up Alarms Maint intervals Path: Main > Setup > System # > Alarms > Maint Intervals The System records the number of hours each of the eight components in each Module has operated. Set the maintenance interval for each type of component in the Modules of your System. Every time the run hours for a component in a Module elapse this number of hours, an alarm will occur.
Set Up Group Up to four NetworkAIR Systems can be connected to form a redundant Group. Joining Systems together to form a Group provides the following: • Redundancy • A way for other Systems in the Group to assist with the room load • Demand fighting prevention (one System cooling while another reheats) • System run time balancing • Setpoint Sharing among Systems • Alarm sharing among Systems Group settings are copied to each System in the Group.
Operation: Set Up Group Grp Smoke Alrm. Share smoke alarms among the Systems in this Group. If the Group Smoke Alarm setting is On, all Systems in the Group will shut down if a smoke alarm occurs in one System. Comm Loss Failover. Decide if the Group considers a System in the Comm Lost state to be failed. • Off — The Group will assume that the System is still operating normally. • On — A backup System will be moved to the online state. Name. Set the name of this Group.
Operation: Set Up Group Note The System Failure Events must be configured at each System in the Group. Unlike other Group settings, the System Failure Events list is not copied to each System in the Group. Configure the list of System Failure Events. If a System failure event occurs, the System in which it occurs transitions to the failed state, and a backup System is engaged if available. Event. Scroll through the list of possible failure events.
Set Up the Display Set display settings, including the time and date, temperature units, passwords, and time-out settings. You can also reset settings to their default values and download new firmware. Password & Time-out Path: Main > Setup > System > Display > Password & Time-out The default user password is APC (uppercase). See “Password entry” on page 4 to enter the password. Note Change passwords. Set the passwords necessary to change System settings. 1.
Operation: Set Up the Display Pressure units. Set the units of measure for pressure readings and settings to either English (psig) or metric (kPa). Adjust display Path: Main > Setup > System # > Display > Display Adjust Set the LCD contrast. Adjust the visibility of the screen text. Lower numbered settings provide darker text; higher numbers provide lighter text. Settings range from 0–7. Key Click. Enable or disable a beep sound every time a key is pressed on the display interface.
Operation: Set Up the Display 5. In your terminal emulator, ensure that the connection is active (HyperTerminal will display a series of “C” characters) and send the file using the XMODEM protocol. 6. When the download is complete, the screen displays the new version. 7. Restart the System. Reset to defaults Path: Main > Setup > System # > Display > Reset to Defaults Reset User Params. Return settings that can be modified with the user password to their factory default settings. Reset Srvc Params.
Set Up Network Configuration Configure the network settings for Network Management Card from the display interface. The management card allows for remote control and configuration of the NetworkAIR IR In-row Precision Air Conditioner. Network config Path: Main > Setup > System # > Network Config MAC Address. Displays the unique network identifier assigned to each Network Management Card at the factory. Mode. Set the method by which the System’s Network Management Card will acquire its network settings.
View Status Readings The display interface has several options for viewing the status of the System, its Modules, and the environment being controlled. The status readings for Modules are available under the Main Module and Expansion Module # options, and status readings for the System are available under the System Status option or on the scrolling status screens. Only the Main Module of a System has a display interface.
Operation: View Status Readings About Module. View identifying information that is helpful when obtaining service: • Manufacturer Name • Model Number • Date of Manufacture • Serial Number • Firmware Revision • Hardware Revision Humidifier Status. View the humidifier output, current drawn by the humidifier, and the conductivity of the water in the humidifier cylinder in this Module. Water Temps. View the coil fluid inlet temperatures for the coolant and hot water supplies (if applicable).
Operation: View Status Readings Group status Path: Main > Status > Group The Group Status screen includes information about the member Systems of the Group and their roles. Group Status. View the assigned role and current state of each System in the Group Group Run hours. View the run hours for each System in the Group Reset Local System Run Hours. Reset the run hours of the local System.
Respond to Alarms When an alarm is triggered, the Main Module alerts you through the display by the following methods: • Alarm beeper • Major or Minor Alarm LED • Active alarm screen • Alarm/Event log Major or minor alarm LEDs When an alarm is triggered, the Check Log LED and either the Minor Alarm LED or the Major Alarm LED activates. The Major and Minor Alarm LEDs cannot be deactivated manually; the alarm condition must be cleared to deactivate them.
Operation: Respond to Alarms Clear active alarms Path: Main > Respond to Alarms > Clear Active Alarms Clears all active alarms. If the conditions that caused the alarm still exist, those conditions cause the alarm to be regenerated. • Clear System Alarms — Clear active alarms that apply to the Modules in this System. • Clear Group Alarms — Clear active alarms that apply to the Group. Reset sys failure Path: Main > Respond to Alarms > Reset Sys Failure Reset a System after a failure event has occurred.
Operation: Respond to Alarms Alarm messages and suggested actions Displayed Alarm Message Action Required Air Block Interlock Open • Verify that the air block is in place. • Confirm that the wiring connections for the air block interlock are secure. Air Filter Clogged • Verify the condition of the return air filters, and replace them if required. • Check the pressure drop across the filters by reviewing the System status. • Ensure that the pressure-sensing tubing is properly connected to the sensor.
Operation: Respond to Alarms Displayed Alarm Message Action Required Cooling Coil Coolant Temp High • Check the chilled water supply temperature. • Verify that the coil fluid coolant temperature high threshold is not set below the normal temperature of your chilled water supply. Cooling Coil Coolant Temp Low • Check the chilled water supply temperature. • Verify that the coil fluid coolant temperature low threshold is not set above the normal temperature of your chilled water supply.
Operation: Respond to Alarms Displayed Alarm Message Action Required Env Temperature Low • Verify that no supply air is fed directly back into the return air. • Ensure that the alarm delay is not set too low. The delay should be long enough to allow the room temperature to stabilize after start-up. • Verify that the temperature alarm threshold for the environmental (return or remote) sensors is below the cool and reheat setpoints. • Verify that the Module is configured and equipped for the reheat mode.
Operation: Respond to Alarms Displayed Alarm Message Action Required Humidifier Cylinder Depleted • Replace the disposable cylinder. • Clean the reusable humidifier cylinder (optional). Humidifier Cylinder Full when Off • Check the humidifier drain valve for clogging. • Check the operation of the humidifier drain solenoid. Humidifier Drain Malfunction • Ensure that the drain is free of any debris. • Verify the operation of the drain solenoid valve.
Operation: Respond to Alarms Displayed Alarm Message Action Required Remote Sensor Added • Check the CAN bus connection to the remote sensors. • Disregard if you added the remote sensor. Replace Steam Cylinder • Replace the steam cylinder. • Clean the steam cylinder (if your System is equipped with reusable humidifier cylinders). Return Sensor Fail • Verify that there is a proper CAN connection between the sensors and the user interface box. • Replace the sensor assembly.
Operation: Respond to Alarms Displayed Alarm Message Action Required System Failure • After correcting the cause of the system failure, perform a Reset System Failure command (Path: Main > Respond to Alarms > Reset Sys Failure). System Fire Detected • Follow the appropriate facility emergency protocol. NOTE: The purpose of the fire sensor is to warn you of possible equipment damage. It is NOT intended to provide a fire alarm system to protect the facility and the lives of its occupants.
Network Management Card Quick Configuration The NetworkAIR IR In-row Precision Air Conditioner is shipped with a Network Management Card that provides for the management of the Air Conditioner over your network. You must set up the Network Management Card in order to control the NetworkAIR IR In-row Precision Air Conditioner through a web browser. Disregard the procedures in this section if you have APC InfraStruXure Manager as part of your system.
Network Management Card: Quick Configuration TCP/IP configuration methods Use one of the following methods to define the TCP/IP settings needed by the Network Management Card: • APC Device IP Configuration Wizard (See “APC Device IP Configuration Wizard” on page 48.) • BOOTP or DHCP server (See “BOOTP & DHCP configuration” on page 48.) • Local computer (See “Local access to the control console” on page 51.) • Networked computer (See “Remote access to the control console” on page 52.
Network Management Card: Quick Configuration With Boot Mode set to DHCP & BOOTP (the default setting), the Network Management Card attempts to discover a properly configured server. It first searches for a BOOTP server, then a DHCP server, and repeats this pattern until it discovers a BOOTP or DHCP server. See “BOOTP” on this page or “DHCP” on page 50. BOOTP. You can use an RFC951-compliant BOOTP server to configure the TCP/IP settings for the Network Management Card.
Network Management Card: Quick Configuration DHCP. You can use a RFC2131/RFC2132-compliant DHCP server to configure the TCP/IP settings for the Network Management Card. This section briefly summarizes the Network Management Card communication with a DHCP server. For more information about how a DHCP server is used to configure the network settings for a Network Management Card, see “DHCP Configuration” in the User’s Guide. \ 1.
Network Management Card: Quick Configuration Local access to the control console You can use a local computer that connects to the NetworkAIR IR System through the serial port on the control board to access the control console. Whenever possible access the control panel through a network connection. The procedure requires the front door and right side (low voltage) of the electrical panel of the NetworkAIR IR In-row Precision Air Conditioner to be open, which creates an electrical hazard. 1.
Network Management Card: Quick Configuration Remote access to the control console From any computer on the same subnet as the Network Management Card, you can use ARP and Ping to assign an IP address to a Network Management Card, and then use Telnet to access that Card’s control console and configure the needed TCP/IP settings. After a Network Management Card has its IP address configured, you can use Telnet, without first using ARP and Ping, to access that Network Management Card. Note 1.
Network Management Card: Quick Configuration TCP/IP settings, select the Boot Mode menu. Select Manual boot mode, and then press ESC to return to the TCP/IP menu. (Changes will take effect when you log out.) 4. Set the System IP, Subnet Mask, and Default Gateway address values. 5. Press CTRL-C to exit to the Control Console menu. 6. Log out (option 4 in the Control Console menu).
How to Access a Configured Unit Overview After the Network Management Card is running on your network, you can use the interfaces summarized here to access the NetworkAIR IR In-row Precision Air Conditioner. For more information on the interfaces, see the User’s Guide. Web interface As your browser, you can use Microsoft® Internet Explorer 5.0 (and higher) or Netscape® 4.0.8 (and higher, except Netscape 6.x) to access the Management Card through its Web interface.
Network Management Card: How to Access a Configured Unit Telnet for basic access. Telnet provides the basic security of authentication by user name and password, but not the high-security benefits of encryption. To use Telnet to access a NetworkAIR IR In-row Precision Air Conditioner’s control console from any computer on the same subnet: 1.
Network Management Card: How to Access a Configured Unit FTP/SCP You can use FTP (enabled by default) or Secure CoPy (SCP) to transfer new firmware to the Network Manager Card, or to access a copy of the System’s event logs. SCP provides the higher security of encrypted data transmission and is enabled automatically when you enable SSH. Note If you enable SSL and SSH for their high-security authentication and encryption, disable FTP.
How to Recover From a Lost Password You can use a local computer, a computer that connects to the Network Management Card or other device through the serial port to access the control console. 1. Select a serial port at the local computer, and disable any service that uses that port. 2. Use the configuration cable (940-0103) to connect the selected port to the serial port (J2) on the controller board. The controller board is in the right compartment of the electrical panel.
How to Upgrade Firmware For a complete description on how to download a firmware upgrade for your Network Management Card and transfer it to the unit, see the User’s Guide on the provided NetworkAIR FM and NetworkAIR IR Precision Air Conditioner CD. For you to be able to use FTP to upgrade a single Network Management Card over the network: • The Network Management Card must be connected to the network. • The FTP server must be enabled at the Network Management Card.
Network Management Card: How to Upgrade Firmware 5. Upgrade the AOS. For example: ftp> bin ftp> put apc_hw02_aos_225.bin 6. When FTP confirms the transfer, type quit to close the session. 7. Wait 20 seconds, and then repeat step 2 through step 5 for the application module. In step 5, use the application module file instead of the AOS module.
Maintenance Monthly Preventive Maintenance Photocopy and use the pages in this section during the maintenance procedures and save them for future reference.
Maintenance: Monthly Preventive Maintenance Cleanliness * Check the condition of return air filters. Replace them if necessary. * Check the condition of the drain pan and remove any accumulation of debris in the pan. Mechanical * Ensure that all components of the evaporator blower and its motor are moving freely, with no signs of binding or damages. * Inspect the set-screws on fan blades and bushings to make sure that they are tight. * Verify that the condensate line is flowing freely.
Quarterly Preventive Maintenance Photocopy and use the pages in this section during the maintenance procedures, and save them for future reference. Perform all the Monthly Preventive Maintenance items AND the items below. Prepared by: _________________________________ Model Number: ______________________________ Serial Number: _______________________________ Date: _________________ Mechanical * Check the water lines for leaks. * Verify that the hardware of the blower and its motor is tight.
Maintenance: Quarterly Preventive Maintenance Functional tests * Verify the following modes of operation: • • • • * Full cooling Full reheat Humidification Dehumidification Verify the operation of these actuators: • Chilled water • Hot water reheat (optional) 64 NetworkAIR IR Operation, Maintenance, and Troubleshooting
Semi-Annual Preventive Maintenance Photocopy and use the pages in this section during the maintenance procedures and save them for future reference. Perform all the Monthly/Quarterly Preventive Maintenance items AND the items below. Prepared by: _________________________________ Model Number: ______________________________ Serial Number: _______________________________ Date: _________________ Cleanliness * Ensure that the chilled water coil is clean.
Troubleshooting Refrigeration Problem Possible Cause Corrective Action Controls are erratic or inoperative • Incorrect secondary voltage. • Ensure that the control transformer secondary voltage is within +/- 10% of 24 VAC. • Remote shutdown input is cycling the Module on and off. • Check the event log for an entry in the log that indicates remote shutdown activity. • Control circuit breaker is tripped. • Reset the control circuit breaker. • Frequency Drive is in an alarm condition or has failed.
Troubleshooting: Semi-Annual Preventive Maintenance Problem Possible Cause Corrective Action Airflow too high • External static pressure may be too low. • Check the evaporator coil pressure drop through the display interface. Pressure should match the recommended pressure drops indicated on the chart based on Module size. If the pressure drop is above the recommended settings, decrease the blower speed until the pressure drop matches the recommended setting.
Troubleshooting: Semi-Annual Preventive Maintenance hlj Problem Possible Cause Corrective Action Humidifier inoperative • Water supply is not on. • Electrical connections are loose. • Humidifier fuse is open. • Relative humidity is above the setpoint. • Turn on the supply. • Tighten all electrical connections. Reheat elements inoperative • Overheat switch is actuated. • A fuse is open. • The thermostat is set too low. • The thermal fuse in the heater is open. • Reset and check for operation.
Warranty Limited Product Warranty for APC Products The limited warranty provided by American Power Conversion Corporation (“APC”) in this Statement of Limited Factory Warranty applies only to Products you purchase for your commercial or industrial use in the ordinary course of your business.
Limited Product Warranty for APC Products Assignment of warranties APC will assign to you any warranties which are made by manufacturers and suppliers of components of the APC Product and which are assignable. Any such warranties are assigned “AS IS” and APC makes no representations as to the effectiveness or extent of such warranties, assumes NO RESPONSIBILITY for any matters which may be warranted by such manufacturers or suppliers and extends no coverage under this Warranty to such components.
Limited Product Warranty for APC Products IN NO EVENT SHALL APC, ITS OFFICERS, DIRECTORS, AFFILIATES OR EMPLOYEES BE LIABLE FOR ANY FORM OF INDIRECT, SPECIAL, CONSEQUENTIAL OR PUNITIVE DAMAGES ARISING OUT OF THE USE, SERVICE OR INSTALLATION OF THE PRODUCTS, WHETHER SUCH DAMAGES ARISE IN CONTRACT OR TORT, IRRESPECTIVE OF FAULT, NEGLIGENCE OR STRICT LIABILITY OR WHETHER APC HAS BEEN ADVISED IN ADVANCE OF THE POSSIBILITY OF SUCH DAMAGE.
Warranty Procedures Claims You will need the model number of the Product, the serial number, and the date purchased. A technician will also ask you to describe the problem. If it is determined that the Product will need to be returned to APC you must obtain a returned material authorization (RMA) number from APC Customer Support. Products that must be returned must have the RMA number marked on the outside of the package, and be returned with transportation charges prepaid.
Warranty Procedures Parts • APC warrants the parts of their systems for 1 year from the date of commissioning or 18 months from the ship date. This warranty only covers the cost of the part and not the labor for installation. • Calls for warranty parts requests need to have specific unit information (serial number, model number, job number) to allow proper identification and processing of the warranty part transaction. • A purchase order may be required to issue a warranty part(s).
APC Worldwide Customer Support Customer support for this or any other APC product is available at no charge in any of the following ways: • Visit the APC Web site to access documents in the APC Knowledge Base and to submit customer support requests. – www.apc.com (Corporate Headquarters) Connect to localized APC Web sites for specific countries, each of which provides customer support information. – www.apc.com/support/ Global support searching APC Knowledge Base and using e-support.
