Emerson Liebert iCOM Training And Service Manual

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Large Systems
iCOM Microprocessor
Environmental Training and Service Manual
TM-10098: Rev. 05/27/08

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  Summary of Contents for Emerson Liebert iCOM

  • Page 1 Large Systems iCOM Microprocessor Environmental Training and Service Manual TM-10098: Rev. 05/27/08...
  • Page 2 iCOM Control Training and Service Manual iCOM Training & Service Manual...
  • Page 3 Liebert Corporation. Liebert® and the Liebert logo are registered trademarks of Liebert Corporation. Emerson® and the Emerson logo are registered trademarks of Emerson Electric Copyright © 2006 by Liebert Corporation All rights reserved throughout the world.
  • Page 4: Table Of Contents

    iCOM Control Training and Service Manual Table of Contents Chapter 1: Temperature/Humidity Control Temperature Control Types Proportional Control Proportional + Integral (PI) Control Proportional + Integral + Derivative (PID) Control Intelligent Control Temperature Control Operations and Charts 2 Stage Compressorized 4 Stage Compressorized Cooling Optional Dual Compressor Digital Scroll Operation Optional Glycool (Econ-O-Cycle) Cooling...
  • Page 5 iCOM Controls Training and Service Manual Chapter 2: Programming Functions Programming Functions iCOM Display Components and Functions iCOM Keypad Layout Descriptions iCOM Display Symbols / Icons Programming Functions Status Display Screens Menu Screens and Symbols User Menu Icons and Descriptions Service Menu Icons and Descriptions Advanced Menu Icons and Descriptions Navigating and Accessing Sub Menus...
  • Page 6 iCOM Control Training and Service Manual Chapter 4: General Troubleshooting Data Introduction Isolation Basic Operation of the Triac Basic Operation of the Opto-Isolator Troubleshooting the Opto-Isolator Unit Control Board: Opto-Isolator/Triac Legends Control Input Check (Aquastat Sensor) iCOM Diagnostics/Service Mode Programs Troubleshooting Checklist Basic Troubleshooting Steps Moisture Content Charts...
  • Page 7: Chapter 1: Temperature/Humidity Control

    Chapter 1 Temperature and Humidity Control Programs This section provides details on how your Liebert iCOM control responds to the user programmed inputs values and room conditions. Refer to this section when you need specific information on the controls operation. This section provides details on the four (4) user selectable temperature control programs and the three (3) user selectable humidity control programs.
  • Page 8: Proportional + Integral (Pi) Control

    iCOM Control Training and Service Manual Proportional + Integral (PI) Control The PI control combines two (2) individual terms to determine the control output for a given set of conditions. The proportional (P) term is determined by the difference between the current temperature and the control set point.
  • Page 9: Intelligent Control

    iCOM Controls Training and Service Manual Intelligent Control The Intelligent Control operates from a set of general rules that define how the control output should be adjusted for different system conditions. The rules are designed to duplicate the actions that an experienced human operator would take if manually controlling the system.
  • Page 10 iCOM Control Training and Service Manual The temperature controller deactivates the second stage of cooling (lag compressor) when the return air temperature decreases to 50% of the cooling proportional control band value. The first cooling stage (lead compressor) is deactivated when the return air temperature decreases to the temperature set point value or 0% of the cooling proportional control band value.
  • Page 11 iCOM Controls Training and Service Manual In the example below the control band begins at the 70°F temperature set point and has a length of 4.5°F, which is ½ of the programmed temperature dead band value plus ½ of the programmed temperature proportional band value. As the return air temperature increases, Cooling 1 (lead compressor) is activated at 72.5°F or ½...
  • Page 12: Stage Compressorized Cooling

    iCOM Control Training and Service Manual Optional 4 - Step Cooling, Two (2) Compressors with Unloaders The basic temperature cooling control band is established at the temperature set point with the length equal to ½ of the programmed temperature proportional band divided by the number of cooling stages.
  • Page 13 iCOM Controls Training and Service Manual The table below shows the sequence of device operation by each of the four (4) cooling stages. STAGE COMPRESSORS, UNLOADER STATE Compressor 1 On, Unloader On (Energized) Compressor 2 Off, Unloader Off (De-Energized) Compressor 1 On, Unloader On (Energized) Compressor 2 On, Unloader On (Energized) Compressor 1 On, Unloader Off (De-Energized) Compressor 2 On, Unloader On (Energized)
  • Page 14 iCOM Control Training and Service Manual The example below is based on a temperature set point of 70°F with a control band length of 4°F, which is ½ of the programmed temperature proportional band value. 4-Step Compressorized Cooling w/No Dead Band...
  • Page 15 iCOM Controls Training and Service Manual The example below is based on a temperature set point of 70°F with a control band length of 4°F, which is ½ of the programmed temperature proportional band value, plus a ½ °F Deadband, which is ½ the programmed temperature deadband. 4 Stage Compressorized Cooling –...
  • Page 16: Optional Dual Compressor Digital Scroll Operation

    iCOM Control Training and Service Manual In the above example that the control band begins at the 70°F temperature set point and has a length of 5°F, which is ½ of the programmed temperature dead band value plus ½ of the programmed temperature proportional band value. As the return air temperature increases Cooling 1 (lead compressor unloaded) is activated at 71.8°F or ½...
  • Page 17 iCOM Controls Training and Service Manual In the chart below we are defining the Digital Compressor start and stop at the sensible cooling capacity and how the compressors load and unload with the PWM (Pulse Width Modulation) from the controller and the unit setting for temperature control.
  • Page 18: Optional Glycool (Econ-O-Cycle) Cooling

    iCOM Control Training and Service Manual Optional Glycool (Econ-O-Cycle) Cooling When Liebert DS units are supplied with the Glycool option, the basic unit is supplied with an additional coil, piping, valve and an Aquastat Sensor (AQ) which measures the glycol fluid temperature. The sensor is mounted to the unit supply fluid line and serves as the control interface in determining the system operation.
  • Page 19 iCOM Controls Training and Service Manual Glycool at 100% Capacity – No Dead Band...
  • Page 20 iCOM Control Training and Service Manual Glycool at 50% Capacity – No Dead Band...
  • Page 21: Optional Dual Source Cooling

    iCOM Controls Training and Service Manual Optional Dual Source Cooling When Liebert DS units are supplied with the Dual Cooling option, the basic unit is supplied with an additional coil, piping, valve and an Aquastat Sensor (AQ) which measures the chilled water fluid temperature. The sensor is mounted to the unit supply fluid line and serves as the control interface in determining the system operation.
  • Page 22: Optional Staged Electric Reheat

    iCOM Control Training and Service Manual Dual Cooling at 100% Capacity – No Dead Band An addition program is available with the Dual Cooling option. The program is called Minimum Chilled Water Temperature. This program allows the end user to select a Minimum Chilled Water Temperature setpoint that will not permit simultaneous operation of the chilled water valve and compressors.
  • Page 23 iCOM Controls Training and Service Manual The temperature controller activates the first electric heating stage when the return air temperature decreases to 33% of the heating proportional band. The second electric heating stage activates when the return air temperature decreases to 66% of the heating proportional band.
  • Page 24 iCOM Control Training and Service Manual 3 Stage Electric Reheat – With Dead Band In the above example that the control band begins at the 70°F temperature set point plus ½ of the programmed temperature proportional band value. As the return air temperature decreases Reheat 1 is activated at 68.2°F or ½ of the dead band value plus 33% of the heating control band.
  • Page 25: Humidity Control

    iCOM Controls Training and Service Manual Humidity Control Humidification and/or Dehumidification in Percent (%) The humidity control program for the iCOM microprocessor is based on a calculated percent (%RH) requirement for humidification and/or dehumidification. This percent (%RH) requirement is determined by the control type (algorithm) selected by the user.
  • Page 26 iCOM Control Training and Service Manual Absolute (Predictive) Humidity Control Flowchart When utilizing the absolute (predictive) humidity control program feature, the humidity level is automatically adjusted ~ 2% RH for each degree difference between the return air temperature and the temperature set point. It is important to remember that the unit displays relative humidity %RH not the actual moisture content value.
  • Page 27: Relative Humidity Control

    iCOM Controls Training and Service Manual Relative Humidity Control Relative humidity control is based on the humidity content in the return air. The iCOM microprocessor control determines the unit humidification/dehumidification operation by comparing the return air humidity value to the control band that is determined by the: •...
  • Page 28 iCOM Control Training and Service Manual Humidifier Operation The Relative Humidity control program is used to illustrate the humidification operation in the following examples. The basic humidification control band is established at the humidity setpoint with the length equal to ½ of the programmed humidity proportional band value.
  • Page 29: Autoflush Control For Infrared Humidifier

    iCOM Controls Training and Service Manual Infrared Humidification – With Dead Band In the above example that the control band begins at the 50% humidity setpoint plus ½ of the programmed dead band value plus ½ of the programmed humidity proportional band value.
  • Page 30 iCOM Control Training and Service Manual If the off time is less than 15 hours (or user programmed value) the pre-fill program is bypassed and the infrared lamps and water valve are activated at the same time to fill the pan to the proper water level and initiate humidification. During normal infrared humidification operation the water makeup valve is periodically opened (pan refill) and closed (no pan refill) based on a timing sequence.
  • Page 31: Dehumidification Operation

    iCOM Controls Training and Service Manual Dehumidification Operation Dehumidification with Absolute (Predictive) Humidity Control When absolute humidity control is used, over dehumidification is avoided in the space. When overcooling occurs, causing an increase in the relative humidity reading, the humidity control program “predicts” what the RH will be when the dehumidification cycle ends and the temperature returns to the programmed set point.
  • Page 32: Stage Dehumidification, Compressorized Operation

    iCOM Control Training and Service Manual In the above example, that the control band begins at the 50% humidity setpoint and has a length of 4%, which is ½ of the programmed humidity proportional band value. As the return air humidity increases, dehumidification operation is activated at 54%RH or 100% of the dehumidification control band.
  • Page 33 iCOM Controls Training and Service Manual return air humidity level decreases to the humidity setpoint or 0% of the humidity proportional band. If the compressors have unloading capability (4-stage cooling), the compressors are activated in the fully loaded condition for each stage of dehumidification. 2 Stage Compressorized Dehumidification –...
  • Page 34 iCOM Control Training and Service Manual 2 Stage Compressorized Dehumidification – With Dead Band In the above example that the control band begins at the 50% humidity setpoint plus ½ of the programmed dead band value plus ½ of the programmed humidity proportional band value.
  • Page 35: Reheat During Dehumidification

    iCOM Controls Training and Service Manual Reheating during Dehumidification The parameter Electric Reheat Operation defines how the reheats react when the return air temperature decreases below the temperature setpoint during the dehumidification process. The following are the selections: Selection Operation No electric reheat allowed during compressorized dehumidification operation.
  • Page 36: Additional Programs

    iCOM Control Training and Service Manual Additional Programs Start Circuit The unit fan is activated. The unit can be switched on or off from 2 inputs: 1. Remote on/off input (RSD – Remote Shutdown Device) 2. Display button Note: Switches 1 and 2 must be wired in series, the unit will start only if both switches are in the ON position.
  • Page 37 iCOM Controls Training and Service Manual Fan Alarm/Fan settings The fan operation is controlled by two (2) digital devices: the Loss of Airflow differential pressure switch and the Main fan overload motor protection. The time delay at the unit start is always 5 seconds shorter than the control delay. High Pressure Cutout When the compressor is commanded to turn ON after being OFF for a period of 10 minutes, or if the power has been removed from the unit and then turned back on,...
  • Page 38 iCOM Control Training and Service Manual High Head Pressure upon Startup continued: If the above “situation” happens 3 times in a rolling twelve-hour period (that means the internal counter reaches 3) the compressor will be locked out and will not come back on until main power is reset or the S302 or S303 counters are reset to 0 (zero).
  • Page 39 iCOM Controls Training and Service Manual High Pressure Internal Counter The internal counter can have 4 states 0, 1 and 2 are OK states, no alarm will show up. If a “Situation”, which caused the counter to increase by 1 becomes older than 12 hours, the value of the counter will be decreased by 1 again.
  • Page 40 iCOM Control Training and Service Manual DigiScroll compressors Note: On units with Digital Scroll Compressors the unloader is energized 0.1 second before the compressor contactor is energized. The compressor(s) run @ 50% for the LPDT value. For the last 30 seconds of the LPDT value, run compressor at 100%.
  • Page 41 iCOM Controls Training and Service Manual If the unit was operating in DX + FC Mode (and the FC valve is open), at the first leaving of Phase 6 the “flow” will check (after the 600 seconds compressor off time) if at the DT 3 (A138) checkpoint the actual unit temperature is above DT 3 (A138 see below).
  • Page 42 iCOM Control Training and Service Manual...
  • Page 43 iCOM Controls Training and Service Manual Pump Down If the pump down parameter is enabled and when there is a call to turn off a compressor the LLSV is closed. If the low suction transducer value does not reach the pumpdown cutout parameter value within 60 seconds the LLSV is turned on than back off (to try to un-stick the LLSV).
  • Page 44 iCOM Control Training and Service Manual DigiScroll compressors Note: On units with Digital Scroll Compressors the unloader is energized 0.1 second before the compressor contactor is energized. Let the compressor run @ 50% capacity for the LPDT value. For the last 30 seconds of the LPDT value, run compressor at 100%.
  • Page 45 iCOM Controls Training and Service Manual does not open, the compressor and LLSV are locked off and an alarm “Pump Down Fail” will appear. There is a re-pump down if the LPS opens again after the compressor has been already stopped – a maximum of 6 re-pump-down cycles per hour are allowed: at the 7 request of re-pump down the alarm “Pump Down Fail”...
  • Page 46 iCOM Control Training and Service Manual...
  • Page 47: Next Maintenance Calculation

    iCOM Controls Training and Service Manual Next Maintenance Calculation Foreword The next maintenance calculation will help run the Liebert Environmental unit in an optimum way to ensure minimum component stress resulting in increased reliability. Calculation of next Maintenance Parameters The following components are included in the calculation individually: •...
  • Page 48 iCOM Control Training and Service Manual The control always takes the component with the most on/ off (cycling) as the reference component, which asking for the nearest maintenance (example: if the fan runs continuously, but the compressor switches on/off all the time, the next maintenance will be calculated from the compressor).
  • Page 49: Shared Parameters

    iCOM Controls Training and Service Manual Fans/Heaters/Humidifier/Compressor 1 and 2 Settings Number of Starts and Working hours The number of starts and total operating hours of each device is counted and recorded since the last maintenance reset. Total working hours can be read in the standard working hour’s window (customer window).
  • Page 50: Networking And Functions

    iCOM Control Training and Service Manual Shared Temperature and Humidity Parameters Example Two units share the master Temperature Control (1/2) Proportional Band Setting such as 10°F, and then each unit will use the master band divided by 2 (units) or 5°F proportional bands.
  • Page 51 iCOM Controls Training and Service Manual Cascade Function Allows additional units to be staged on/off based on the temperature or humidity requirement. iCOM Network Setup Process To setup a system network with the iCOM control requires a complete understanding of the control processes and parameter programming to insure the proper functional operation without incident.
  • Page 52 iCOM Control Training and Service Manual Small Displays Small Displays use a single CAN (controller area network) connection between the display and the unit control board. A small display can only program the control board it is connected to. 2. Only two units with Small Displays can be networked together.
  • Page 53 iCOM Controls Training and Service Manual Example A: 2 Units with Small Display’s The following referenced parameters are located in the in the Network Menu. Large Control Boards S836 Control Board IP Address 192.168.254.xxx S837 Control Board Netmask IP 255.255.255.000 (must be the same Address in each unit) S838 Control Board Gateway IP...
  • Page 54 iCOM Control Training and Service Manual Example B: 2 Units, One Large Display and One Small Display The following referenced parameters are located in the in the Network Menu. Large Display S802 Number of Connected Units 1 - 32 S813 Large Display IP Address 192.168.254.xxx S814 Large Display Netmask IP 255.255.255.000 (must be the same...
  • Page 55 iCOM Controls Training and Service Manual Example C: One Large Wall Display and Five Small Display Units The following references parameters in the Network Menu. Remote Wall Mounted Large Display S802 Number of Connected Units 1 - 32 S813 Large Display IP Address 192.168.254.xxx S814 Large Display Netmask IP 255.255.255.000 (must be the same...
  • Page 56 iCOM Control Training and Service Manual Example D: Four Units with Small Displays in 2 Groups with Large Wall Mounted Displays The following references parameters in the Network Menu. Remote Wall Mounted Large Displays S802 Number of Connected Units 1 - 32 S813 Large Display IP Address 192.168.254.xxx...
  • Page 57 iCOM Controls Training and Service Manual Multi-Unit IP Address Setup Chart Sample Default Addresses Control Board Large Display 192.168.254.001 192.168.254.003 S836 S813 255.255.255.000 255.255.255.000 S837 S814 S838 000.000.000.000 S815 000.000.000.000 Unit #1 Unit #2 Unit #3 U2U = 1 U2U = 33 U2U = 2 U2U =34 U2U = 3...
  • Page 58: Teamwork

    iCOM Control Training and Service Manual Teamwork Teamwork Teamwork is the ability to group unit functionality, while connected in a network to provide the ability to work together as a team. There are three different teamwork modes. No Teamwork In this mode all units are working independently for control and functionality. No values or sensors are shared.
  • Page 59: Unit Lead/Lag Or Running/Standby Functions

    iCOM Controls Training and Service Manual Teamwork Mode 2 In teamwork mode 2 all system parameters are shared equally as in teamwork mode 1. The lead unit will average the temperature and humidity of all connected units. Each unit operates on its own sensors for their operational needs if there is a request for cooling, heating, dehumidification or humidification.
  • Page 60 iCOM Control Training and Service Manual If the end user enables the parameter “Start all Standby units by HT” all available standby units will turn ON and will continue to run until the return air temperature in the unit in alarm decrease to approximately 5°F below the high temperature alarm setpoint.
  • Page 61 iCOM Controls Training and Service Manual Standby and Cascade Normally the standby unit(s) will start when an alarm occurs in of one of the running units. If the standby units are also programmed to cascade, they will start in order to “help” the operating units control the room. If the temperature and/or humidity condition exceeds the programmed control range, the cascaded units are switched ON before a high or low temperature or humidity alarm occurs.
  • Page 62 iCOM Control Training and Service Manual Notes:...
  • Page 63: Chapter 2: Programming Functions

    iCOM Controls Training and Service Manual Chapter 2 Programming Functions The standard iCOM control is supplied with a front panel mounted small display screen display which features a 128 x 64 dot matrix graphics. The display provides both descriptive text readouts and two (2) menu icons. The optional large screen display features a 320 x 240 dot matrix graphic display that shows user and service icons as well as descriptive text and graphics.
  • Page 64: Icom Display Components And Functions

    iCOM Control Training and Service Manual iCOM Display Components and Functions The keypad functions and LEDs are identical on both the Small and Large displays. The large display is shown for reference. Liquid Crystal display LED Status Indicators Top LED is red or flashing red - alarm, Bottom LED is amber (power on) or green (unit on) Keypad iCOM Keypad Layout:...
  • Page 65: Icom Keypad Layout Descriptions

    iCOM Controls Training and Service Manual iCOM Keypad Descriptions: Icon Key Name Function On/Off Key Controls the operation state of the unit. Alarm Key Silences the audible alarm. Help Key Accesses the integrated help menus. ESCape Key Returns to the previous display. Enter Key Confirms all selections, icons and text.
  • Page 66: Icom Display Symbols/Icons

    iCOM Control Training and Service Manual iCOM Display Symbols/Icons compressor freecooling maintenance hot water el. heaters dehum horn The iCOM programming functions are separated into three (3) basic menus: • User Menu • Service Menu • Advanced Menu When the desired icon has been selected, press the enter key. If the selected menu item has submenus, they are now revealed.
  • Page 67: Programming Functions

    iCOM Controls Training and Service Manual Programming Functions Displays The Large and Small Display’s have the ability to present information in two formats: The Graphic format shows a bar graph and icon for every function (even if your unit does not use this function). The bar is highlighted when the function is operational, indicating the percent operating of the required function.
  • Page 68: Status Display Screens

    iCOM Control Training and Service Manual Small Display Graphic View Small Display Simple View...
  • Page 69 iCOM Controls Training and Service Manual Large Display Graphic View Large Display Simple View...
  • Page 70: Menu Screens And Symbols

    iCOM Control Training and Service Manual Menu Screens and Symbols Menu Parameters Names Level 1: User Level 2: Service Level 3: Advanced Readable w/o password Readable w/o password Readable w/o password PW required to program PW required to program PW required to program Setpoints Setpoints Factory Settings...
  • Page 71: User Menu Icons And Descriptions

    iCOM Controls Training and Service Manual User Menu Icons and Descriptions Available Icon Name Descriptions Display °C/ °F To view and change temperature Small and Setpoints % RH and humidity set points Large Spare Parts Displays the spare parts list of the Large only List unit...
  • Page 72: Service Menu Icons And Descriptions

    iCOM Control Training and Service Manual Service Menu Icons and Descriptions Available Icon Name Descriptions Display °C/ °F To view and change temperature and Small and Set Points % RH humidity set points Large Is a notepad containing notes from Unit Diary Large only the service person or customer...
  • Page 73: Advanced Menu Icons And Descriptions

    iCOM Controls Training and Service Manual Advanced Menu Icons and Descriptions Available Icon Name Descriptions Display Factory configuration files. Factory Small and Do Not Change Settings Settings Large Consult the Factory First Compressor Shows operational status of the Large Info compressor(s).
  • Page 74: Where And When To Save

    iCOM Control Training and Service Manual Navigating and Accessing Sub-Menus for Small Displays To navigate and access any parameter when in the MENU screens press the ENTER key. This will highlight the Password Level. Pressing the DOWN arrow key will let you navigate the sub-menus. Press the ENTER key on the sub-menu you want to access.
  • Page 75 iCOM Controls Training and Service Manual Large Display Saves Save Parameters Menu Location Menu Line (Configuration Safe) Network Menu/System View (PG 1) S809 (Network Safe) Network Menu/System View (PG 1) S810 (Bootloader Variables) Network Menu/System View (PG 2) S821 Entering a Password To enter a password to change a parameter press the ENTER key.
  • Page 76: User Menu Parameters

    iCOM Control Training and Service Manual Menu Parameters The following pages show all of the various parameters, default values and programming ranges. USER MENU Parameters - Password: 1490 Small Display parameters are shown in CAPITAL LETTERS Large Display parameters are shown in (Parenthesis) Parameters may be System or Unit and either Read only or Read/Write.
  • Page 77 iCOM Controls Training and Service Manual USER MENU’s Continued Spare Parts List (Large Display only) – Read Only Displays the various part numbers of the components/parts supplied in the unit. Event Log – Read Only Stores and displays the last 400 events that have occurred at the unit. Graphics Parameters Parameter Control...
  • Page 78 iCOM Control Training and Service Manual USER MENU’s Continued Set Alarm Parameters Parameter Control Menu Shared SMALL DISPLAY Default Range Board Line in TW1 (Large Display) Safe U201 (Password) RTN SNSR NO, YES U202 (Return Sensor Alarms) (Disable) (Enable, Disable) HI TEMP U203 80°F...
  • Page 79 iCOM Controls Training and Service Manual USER MENU’s Continued Sensor Data Parameters, page 1 of 2 – Read Only Parameter Menu SMALL DISPLAY Line (Large Display) U301 TEMP A (Optional Sensor A Temperature) U302 HUM A (Optional Sensor A Humidity) U303 TEMP B (Optional Sensor B Temperature) U304...
  • Page 80 iCOM Control Training and Service Manual USER MENU’s Continued Display Setup Parameters Parameter Menu Shared Display SMALL Default Range Line in TW1 Safe DISPLAY EN (English), DEU (Deutsch), ITA (Italiano), FRE (French), LANGUAGE ESP (Espanol), U401 EN (English) (Language) POR (Portugues), CZE (Czech), RUS (Russian), CHI (Chinese),...
  • Page 81 iCOM Controls Training and Service Manual USER MENU’s Continued Total Run Hours Parameters Parameter LIMIT Control Menu SMALL DISPLAY (Limit Board Line (Large Display) Range Hr) Safe (Actual LIMIT U501 Hours) (Limit) U502 MOTOR(S) (Fan Motors) 0 - 32000 U503 COMP1 (Compressor 1) 0 - 32000 U504...
  • Page 82 iCOM Control Training and Service Manual USER MENU’s Continued Sleep Mode Parameters Parameter Control Menu Shared SMALL DISPLAY Default Range Board Line in TW1 (Large Display) Safe U601 (PASSWORD) MON, TUE, WED, THU, U602 No, Yes FRI, SAT, SUN (Sleep On) U603 M, T, W, T, F, S, SU (No) No, Yes...
  • Page 83: Service Menu Parameters

    iCOM Controls Training and Service Manual SERVICE MENU - 5010 Small Display parameters are shown in CAPITAL LETTERS Large Display parameters are shown in (Parenthesis) Parameters may be System or Unit and either Read only or Read/Write Note: The column indicated by TW1 (Teamwork Mode 1) is a list of parameters that are shared when TW1 is selected for the control operation.
  • Page 84 iCOM Control Training and Service Manual SERVICE MENU’s Continued * Note: Menu line S103 – Control type selection for PID and Menu line S106 - Temperature Derivative Time parameters appear on the display but are not active at this time. Setpoint Parameters, page 2 of 3 Parameter Control...
  • Page 85 iCOM Controls Training and Service Manual SERVICE MENU’s Continued Setpoint Parameters, page 3 of 3 Parameter Control Menu Shared SMALL DISPLAY Default Range Board Line in TW1 (Large Display) Safe S123 (Password) NO, YES S124 SUP LIM (Supply Limit) (Disable) (Enable, Disable) SUP TEMP (Supply Limit S125...
  • Page 86 iCOM Control Training and Service Manual SERVICE MENU’s Continued Setpoint Parameters, page 3 of 3 continued Parameter Control Menu Shared SMALL DISPLAY Default Range Board Line in TW1 (Large Display) Safe C01 TD (Compressor 1 S149 m (min) Stop delay) C02 ON (Start S150 Compressor 2 At)
  • Page 87 iCOM Controls Training and Service Manual SERVICE MENU’s Continued Standby Settings/Lead-Lag Parameters Parameter Control Menu Shared SMALL DISPLAY Default Range Board Line in TW1 (Large Display) Safe S501 (Password) #STANDBY (Number S502 0 - 32 of Standby Units) NO, DAILY, MON, TUE, WED, THU, FRI, SAT, SUN, M-MO, M-TU, M-WE, M-TH,...
  • Page 88 iCOM Control Training and Service Manual SERVICE MENU’s Continued Maintenance/ Wellness Parameters Basic Settings, page 1 of 8 Parameter Control Menu Shared SMALL DISPLAY Default Range Board Line in TW1 (Large Display) Safe S001 (Password) FREQ/YR (Maintenance 0 – 12 Per S002 Frequency Per Year) Year...
  • Page 89 iCOM Controls Training and Service Manual SERVICE MENU’s Continued Wellness Compressor 1 Settings, page 3 of 8 Parameter Control Menu SMALL DISPLAY Default Range Board Line (Large Display) Safe S023 (Password) S024 STARTS (Number of Starts) 0 – 32000 S025 RUN HRS (Run Hours) 0 –...
  • Page 90 iCOM Control Training and Service Manual SERVICE MENU’s Continued Wellness Electric Heater 1 Settings, page 5 of 8 Parameter Control Menu SMALL DISPLAY Default Range Board Line (Large Display) Safe S045 (Password) S046 STARTS (Number of Starts) 0 – 32000 S047 RUN HRS (Run Hours) 0 –...
  • Page 91 iCOM Controls Training and Service Manual SERVICE MENU’s Continued Wellness Electric Heater 3 Settings, page 7 of 8 Parameter Control Menu SMALL DISPLAY Default Range Board Line (Large Display) Safe S067 (Password) S068 STARTS (Number of Starts) 0 – 32000 S069 RUN HRS (Run Hours) 0 –...
  • Page 92 iCOM Control Training and Service Manual SERVICE MENU’s Continued Diagnostics/Service Mode, page 1 of 7 Parameter Menu SMALL DISPLAY Range Line (Large Display) S301 (Password) S302 HP1 CODE (HP 1 Alarm Code) 1, 2, 4 or 5 S303 HP2 CODE (HP 2 Alarm Code) 1, 2, 4 or 5 S304 HT1 CNT (HT 1 Alarm Counter)
  • Page 93 iCOM Controls Training and Service Manual SERVICE MENU’s Continued Diagnostics/Service Mode, page 2 of 7 Parameter Menu SMALL DISPLAY Range Line (Large Display) S312 (Password) S313 MANUAL (Manual Mode) YES, NO (Yes, No) S314 MOTOR(S) (Motors) OFF, ON (Off, On) OFF, ON, S315 COMP1 (Compressor 1)
  • Page 94 iCOM Control Training and Service Manual SERVICE MENU’s Continued Diagnostics/Service Mode, page 3 of 7 Parameter Menu SMALL DISPLAY Range Line (Large Display) S323 (Password) S324 EL HEAT1 (Electric Heat 1 or HG/HW) OFF, ON (Off, On) S325 EL HEAT2 (Electric Heat 2 or E.Heat 1) OFF, ON (Off, On) S326 EL HEAT3 (Electric Heat 3 or E.Heat 2)
  • Page 95 iCOM Controls Training and Service Manual SERVICE MENU’s Continued Diagnostics/Service Mode, page 5 of 7 – Read Only Parameter Menu SMALL DISPLAY Range Line (Large Display) S345 RSD (Status Remote Shutdown) ON. OFF (On, Off) S346 AIR LOSS (Status Airflow Loss) OK, ACT (OK, Active) S347 MOTOR OL (Status Motor Overload)
  • Page 96 iCOM Control Training and Service Manual SERVICE MENU’s Continued Diagnostics/Service Mode, page 7 of 7 – Read Only Parameter Menu SMALL DISPLAY Range Line (Large Display) S367 HUM PROB (Status Humidifier Problem) OK, ACT (OK, Active) S368 DT1 (not on Large Display) S369 DT2 * (Status DT2 Glycol/Room) OFF, ACT (OK, Active)
  • Page 97 iCOM Controls Training and Service Manual SERVICE MENU’s Continued Set Alarm Parameters, page 1 of 7 Parameter Control Menu Shared SMALL DISPLAY Default Range Board line in TW1 (Large Display) Safe S201 (Password) RTN SNSR YES, NO S202 (Return Sensor Alarms) (Enabled) (Enable, Disable) HI TEMP (High Return...
  • Page 98 iCOM Control Training and Service Manual SERVICE MENU’s Continued Set Alarm Parameters, page 2 of 7 Parameter Control Menu SMALL DISPLAY Default Range Board Line (Large Display) Safe S212 (Password) S213 CUST IN1 (Customer Input 1) Water Alarm See Note C1 ACT (Customer Input 1 CLOSED CLOSED, OPEN...
  • Page 99 iCOM Controls Training and Service Manual SERVICE MENU’s Continued Small Display messages in CAPITAL LETTERS (large display messages in parenthesis): Customer Input 1, 2, 3 and 4 alarm messages are selected by the customer. Below are the pre-programmed alarm message choices. The customer cannot write a custom alarm message.
  • Page 100 iCOM Control Training and Service Manual SERVICE MENU’s Continued The end user may be able to change the default Alarm Type setting for some of the alarms. The table below defines what occurs at the unit when an alarm becomes active. Alarm Audible Red Alarm...
  • Page 101 iCOM Controls Training and Service Manual SERVICE MENU’s Continued Set Alarm Parameters, page 3 of 7 Parameter Default / Control Menu Default / SMALL DISPLAY Range in Default / Range Board Line Range (Large Display) Seconds Safe S223 (Password) Alarm / FOL (Main Fan 10 sec / YES, NO...
  • Page 102 iCOM Control Training and Service Manual SERVICE MENU’s Continued Set Alarm Parameters, page 4 of 7 Parameter Default / Control Menu Default / Default / SMALL DISPLAY Range in Board Line Range Range (Large Display) Seconds Safe S236 (Password) YES, NO Alarm / Internal –...
  • Page 103 iCOM Controls Training and Service Manual SERVICE MENU’s Continued Set Alarm Parameters, page 5 of 7 Parameter Default / Control Menu Default / Default / SMALL DISPLAY Range in Board Line Range Range (Large Display) Seconds Safe S249 (Password) YES, NO 5 sec / S251 (Working Hours...
  • Page 104 iCOM Control Training and Service Manual SERVICE MENU’s Continued Set Alarm Parameters, page 6 of 7 Parameter Default / Control Menu Default / Default / SMALL DISPLAY Range in Board Line Range Range (Large Display) Seconds Safe S262 (Password) YES, NO Alarm / 5 sec / S264...
  • Page 105 iCOM Controls Training and Service Manual SERVICE MENU’s Continue Set Alarm Parameters, page 7 of 7 Parameter Default / Control Menu Default / Default / SMALL DISPLAY Range in Board Line Range Range (Large Display) Seconds Safe S275 (Password) YES, NO Message / 5 sec / S277...
  • Page 106 iCOM Control Training and Service Manual SERVICE MENU’s Continue Sensor Calibration Parameters, page 2 of 3 Parameter Control Menu SMALL DISPLAY Range Board Line (Large Display) Safe S612 (Password) S613 TEMP A (Temperature Sensor A) ±18°F S614 CAL A (Calibrated Temperature Sensor A) 32 –...
  • Page 107 iCOM Controls Training and Service Manual SERVICE MENU’s Continue Network Setup Parameters – SMALL Display Unit View (Control Board) Control Menu Parameter Default Range Board Line SMALL DISPLAY Safe S802 # UNITS 1 – 32 S803 TEAMWORK No, 1, 2 S824 MON ADD 1 –...
  • Page 108 iCOM Control Training and Service Manual SERVICE MENU’s Continued System/Network Setup Parameters - LARGE Display (System View), page 1 of 2 Control Menu Parameter Display Default Range Board Line (Large Display) Safe Safe S801 (Password) S802 (Number of Connected Units) 1 –...
  • Page 109 iCOM Controls Training and Service Manual SERVICE MENU’s Continued System/Network Setup Parameters – LARGE Display Unit View, page 1 of 2 Control Menu Parameter Default Range Board Line (Large Display) Safe S823 (Password) S824 (Monitoring Address) 1 – 99 S825 (Monitoring Timeout/Handshake) * 0 –...
  • Page 110 iCOM Control Training and Service Manual SERVICE MENU’s Continued Options Setup Parameters, page 1 of 2 Parameter Control Menu SMALL DISPLAY Default Range Board Line (Large Display) Safe S401 (Password) S402 COMP SEQ (Compressor Sequence) Auto Auto, 1, 2 S403 LP DELAY (Low Pressure Alarm Delay) 3 min 0 –...
  • Page 111 iCOM Controls Training and Service Manual SERVICE MENU’s Continued Options Setup Parameters, page 2 of 2 Parameter Control Menu Display SMALL DISPLAY Default Range Board Line Safe (Large Display) Safe S412 (Password) HUM ENAB S413 No, Yes (Humidification Enabled) IR FLUSH S414 150% 110 –...
  • Page 112 iCOM Control Training and Service Manual SERVICE MENU’s Continued Service Contacts Parameters Parameter Control Menu SMALL DISPLAY Range Board Line (Large Display) Safe S701 (Password) NONE, AUSTRIA, SWISS D, SWISS F BENELUX D, BENEL.FL, GERMANY, FRANCE, UK, HUNGARY, ITALY, POLAND, SPAIN, USA, AUSTRALIA, N ZEALAND, COUNTRY INDONESIA, MALAYSIA, SINGAPORE (None,...
  • Page 113: Advanced Menu Parameters

    iCOM Controls Training and Service Manual ADVANCED MENU - Password: 2210 Small Display parameters are shown in CAPITAL LETTERS Large Display parameters are shown in (Parenthesis) Parameters may be System or Unit and either Read only or Write. Factory Settings Parameters, page 1 of 9 Parameter Control Menu...
  • Page 114 iCOM Control Training and Service Manual ADVANCED MENU Continued * Notes: Menu lines A008 and A009 are for the unit code. When the status indicates “Code Not Available” you will need to enter the correct code for the system as listed on the decal located on the dead front panel of the unit. These values must be entered on menu lines A003, A005 and A007.
  • Page 115 iCOM Controls Training and Service Manual ADVANCED MENU Continued Factory Settings Parameters, page 3 of 9 Parameter Control Menu SMALL DISPLAY Default Range Board Line (Large Display) Safe A112 (Password) A113 DS CYCLE (Digital Scroll Cycle) 15 sec No, 10 – 30 sec A114 DS HT (High Temp Digital Scroll) 268°F...
  • Page 116 iCOM Control Training and Service Manual ADVANCED MENU’s Continued Note 2: Low Pressure Threshold Phase 2 (Menu Line A118): The displayed pressure value for menu line A118 – Low Pressure Threshold Phase 2 is determined by the combinations of programmed selections on menu lines: A102 (Refrigerant Type) + A137 (Cooling Type) + S407 (Hot Water Reheat).
  • Page 117 iCOM Controls Training and Service Manual ADVANCED MENU’s Continued Factory Settings Parameters, page 5 of 9 Parameter Control Menu SMALL DISPLAY Default Range Board Line (Large Display) Safe A134 (Password) A136 CW F DUR (CW Flush Duration) 0, 1, 2, 3 Min SINGL, FC, SINGL DC (Single...
  • Page 118 iCOM Control Training and Service Manual ADVANCED MENU’s Continued Factory Settings Parameters, page 6 of 9 Parameter Control Menu SMALL DISPLAY Default Range Board Line (Large Display) Safe A145 (Password) NO, EXT, IFS, IFL, PEX6, PEX9, PEX12, 21LLA, 53LLC, 53HLB, 93LLE, 93HLD, d3H, HT2, HT5, HT9 (No, External, IFS, IFL,...
  • Page 119 iCOM Controls Training and Service Manual ADVANCED MENU’s Continued Factory Settings Parameters, page 7 of 9 Parameter Control Menu SMALL DISPLAY Range Board Line (Large Display) Safe A156 (Password) A157 ANOUT1LO/HI (Analog Output 1 Low/High Limit) 0 – 100% A158 ANOUT2LO/HI (Analog Output 2 Low/High Limit) 0 –...
  • Page 120 iCOM Control Training and Service Manual ADVANCED MENU’s Continued Factory Settings Parameters, page 8 of 9 Parameter Control Menu SMALL DISPLAY Range Board Line (Large Display) Safe A167 (Password) A168 AO1 STA (Analog Output 1 Start Point) 0% = 0.0V A169 AO1 END ( Analog Output 1 End Point) 100% = 10.0V...
  • Page 121 iCOM Controls Training and Service Manual ADVANCED MENU’s Continued Compressor Status Parameters - Large Display only, page 1 of 6 Menu Parameter Range Definition Line (Large Display) A301 (Password) Compressor rotation, shows actual lead A302 (First Compressor) 1, 2 compressor (Compressor 1 A303 No, Yes...
  • Page 122 iCOM Control Training and Service Manual ADVANCED MENU’s Continued Compressor Status Parameters - Large Display only, page 2 of 6 Menu Parameter Range Definition Line (Large Display) A312 (Password) (Compressor 1 On A313 No, Yes Yes if compressor is requested direct) (Compressor 1 On Yes if compressor is requested and timers...
  • Page 123 iCOM Controls Training and Service Manual ADVANCED MENU’s Continued Compressor Status Parameters - Large Display only, page 3 of 6 Menu Parameter Range Definition Line (Large Display) A323 (Password) (Compressor 1 LP A324 Number Shows actual Low Pressure phase Phase) (Compressor 1 LP A325 0 –...
  • Page 124 iCOM Control Training and Service Manual ADVANCED MENU’s Continued Compressor Status Parameters - Large Display only, page 4 of 6 Menu Parameter Range Definition Line (Large Display) A334 (Password) A335 (First Compressor) 1, 2 Compressor rotation, actual lead compressor (Compressor 2 A336 No, Yes Yes: Compressor is Off by to alarm...
  • Page 125 iCOM Controls Training and Service Manual ADVANCED MENU’s Continued Compressor Status Parameters - Large Display only, page 5 of 6 Menu Parameter Range Definition Line (Large Display) A345 (Password) (Compressor 2 On A346 No, Yes Yes if compressor is requested direct) (Compressor 2 On Yes if compressor is requested and timers...
  • Page 126 iCOM Control Training and Service Manual ADVANCED MENU’s Continued Compressor Status Parameters - Large Display only, page 6 of 6 Menu Parameter Range Definition Line (Large Display) A356 (Password) (Compressor 2 LP A357 Number Shows actual Low Pressure phase Phase) (Compressor 2 LP A358 0 –...
  • Page 127 iCOM Controls Training and Service Manual ADVANCED MENU’s Continued Motorized Ball Valve Settings - Large Display only, page 1 of 1 Menu Parameter Range Line (Large Display) A401 (Password) A403 (Max Setpoint/Output) 0 – 580 psia / 0 – 100% A404 (U4 Actual/Setpoint/Ouput Change) 0 –...
  • Page 128 iCOM Control Training and Service Manual ADVANCED MENU’s Continued Runtime Monitoring - Large Display only, page 1 of 7 – State, Read Only Menu Parameter Range Line (Large Display) A601 (Password) A602 (Current Operating State) 0 – 99 A603 (Current Control Mode State) 0 –...
  • Page 129 iCOM Controls Training and Service Manual ADVANCED MENU’s Continued Runtime Monitoring - Large Display only, page 3 of 7 – Heaters, Read Only Menu Parameter Range Line (Large Display) A625 (Heater 1 State without Rotation) 0 – 3 A626 (Heater 2 State without Rotation) 0 –...
  • Page 130 iCOM Control Training and Service Manual ADVANCED MENU’s Continued Runtime Monitoring - Large Display only, page 5 of 7 – Fuzzy 1, Read Only Menu Parameter Range Line (Large Display) A649 (Fuzzy Input) 0.00 – 99.99% A650 (Fuzzy Output Deviation) 0.00 –...
  • Page 131 iCOM Controls Training and Service Manual ADVANCED MENU’s Continued Runtime Monitoring - Large Display only, page 7 of 7 – Fuzzy 3, Read Only Menu Parameter Range Line (Large Display) A673 (Fuzzy Temp Rate) ± 999 A674 (Fuzzy Hum Rate) ±...
  • Page 132: Chapter 3: Icom Hardware Connections

    iCOM Control Training and Service Manual Chapter 3 iCOM Board Electrical Connections Introduction This section describes the basic connection points on the Liebert DS units. Each sub-section describes the standard electrical connections and control DIP switches supplied with the various iCOM control boards. The detail is as follows: Display Assembly: Small and Large Plug and Terminal Block Connections Fuse Board: All Units...
  • Page 133: Display Assemblies

    iCOM Controls Training and Service Manual Display Assemblies Both the Large and Small display assemblies are mounted to the unit accent panel. The large Display assembly uses one (1) CAN cable and one (1) crossover Ethernet cable to connect to the control board. The Small Display assembly uses one (1) CAN cable to connect to the control board Small Display Large Display...
  • Page 134: Unit Control Board Dip Switches And Jumpers

    iCOM Control Training and Service Manual Control Board DIP Switches The following section describes the control board DIP switch settings for defining the analog inputs. DIP Switches Unit Mounted Control Board...
  • Page 135 iCOM Controls Training and Service Manual iCOM Control Board DIP Switch Settings for Analog Input Setup Plug Connector Input/Output Type Setting P7-1 (+) / P7-2 (-) NTC Thermistor * Software (ASW1 = 1) PTC Thermistor Software (ASW1 = 0) P11-1 (+) / P11-2 (-) Analog Voltage: 0 to +5V * Sw2-1: On / Sw2-2: Off Analog Voltage: 0 to +10V...
  • Page 136: Small Display Dip Switches

    iCOM Control Training and Service Manual iCOM Control Board Jumper Settings Jumper Type Setting Watchdog *Shunt on Pins 1 & 2 CAN Bus Terminator *Shunt on Pins 1 & 2 Bootloader *No Shunt * Default Setting Small Display DIP Switch #3 Settings Type Setting SW3 - 1...
  • Page 137: Large Display Dip Switches And Jumpers

    iCOM Controls Training and Service Manual Large Display DIP Switch #3 Settings Large Display DIP Switch #3 Settings Position Type Setting SW3 - 1 CAN Address SW3 - 2 CAN Address SW3 - 3 CAN Address SW3 - 4 CAN Address SW3 - 5 CAN Address SW3 - 6...
  • Page 138: Temperature/Humidity Board Dip Switches And Jumpers

    iCOM Control Training and Service Manual Temperature/Humidity Board DIP Switch #1 Settings SW1 - 1 SW1 - 2 SW1 - 3 SW1 - 4 SW1 - 5 SW1 - 6 Comments Internal T/H Sensor Sensor A Sensor B Sensor C Temperature/Humidity Board Jumper Settings Jumper Type...
  • Page 139: Unit Control Board Plug Connectors

    iCOM Controls Training and Service Manual Control Board Plug Connectors This section identifies the various plug connections and the terminal block connections located on the unit control board. The tables in this section show all of the pin connections and the reference points for signal flow through these connections.
  • Page 140 iCOM Control Training and Service Manual DS/VS Units: P4: 24 VAC Power P4-1: Fuse 1 (24 VAC) P4-3: Fuse 3 (24 VAC) P4-2: Fuse 2 (24 VAC) P4-4: Fuse 4 (24 VAC) P7: Fluid Sensor P7-1: Aquastat Sensor P7-3: No Connection P7-2: Aquastat Sensor P7-4: No Connection...
  • Page 141 iCOM Controls Training and Service Manual P13: DCV Thermistor Signals P13-1: No Connection P13-2: No Connection P13-3: DCV Signal to Digital Scroll Thermistor 1 P13-4: DCV Signal from Digital Scroll Thermistor 1 P13-5: DCV Signal to Digital Scroll Thermistor 2 P13-6: DCV Signal from Digital Scroll Thermistor 2 P18: Serial Cable Plug Connection –...
  • Page 142 iCOM Control Training and Service Manual P36: Basic Unit Connections P36-1: 24 VAC Out (Filter Clog) P36-9: No connection P36-2: 24 VAC (Filter Clog Alarm) P36-10: P36-3: 24 VAC Out (MF) P36-11: No connection P36-4: 24 VAC Out (AS Switch) P36-12: No connection P36-5:...
  • Page 143 iCOM Controls Training and Service Manual P53: Motorized Ball Valve #1 (MBV-1) P53-1: 24 VAC Out to MVB-1 P53-4: 24 VAC Gnd (E4) P53-2: 24 VAC Out P53-5: No connection P53-3: MVB-1 Signal to MP P54: Motorized Ball Valve #2 (MBV-2) P54-1: 24 VAC Out to MVB-2 P54-4:...
  • Page 144: Fuse Board Connectors

    iCOM Control Training and Service Manual Fuse Board Layout: All Units This section deals with the seven (7) plug connectors on the fuse board. The fuse board is supplied on all systems with iCOM and is located in the low voltage section of the unit.
  • Page 145: Temperature/Humidity Board Connectors

    iCOM Controls Training and Service Manual Temperature/Humidity Board: All Units This section deals with the single plug connection located on the system temperature and humidity board. The temperature/ humidity board is supplied on all systems with iCOM controls. The cable is plugged into Plug P67 on the unit microprocessor board and transmits information using “CAN”...
  • Page 146 iCOM Control Training and Service Manual NOTES:...
  • Page 147: Chapter 4: General Troubleshooting Data

    iCOM Controls Training and Service Manual Chapter 4 General Troubleshooting Data * Basic Operation of the Opto and Triac * Troubleshooting the Opto-Isolator and Triac * Control Input Check (Sensors) * Troubleshooting Signals and Checklist * Moisture Content Charts This section covers only very basic electronics. The major components, such as triacs and opto-isolators are briefly described and related to the Liebert units you have come to study.
  • Page 148: Isolation

    iCOM Control Training and Service Manual The path of a signal from beginning to the end - using the four block process. C P U INPUT MICRO OUTPUT LOAD MEMORY The temperature sensor senses a rise in temperature. The rise is transmitted to the Central Processing Unit (CPU).
  • Page 149: Basic Operation Of The Triac

    iCOM Controls Training and Service Manual BASIC OPERATION OF THE TRIAC To better understand the operation of the triac, we need to look at the movement of electrons in a special type of material used in electronics. Here we have a semiconductor material with what is called a depletion region.
  • Page 150 iCOM Control Training and Service Manual The triacs that Liebert uses are standard in the industry and are rated at a 2-amp capacity. You can check these devices for proper operation while they are connected in the circuit. If the load is removed from the device, you can get a false reading from the meter.
  • Page 151: Basic Operation Of The Opto-Isolator

    iCOM Controls Training and Service Manual Basic Operation of the Opto-Isolator The purpose of the opto-isolator is to provide isolation of two voltage sources. This allows a DC voltage source to activate an AC voltage load device or allows an AC voltage source to provide a DC signal. We are working with two types of circuits, an input and an output.
  • Page 152: Troubleshooting The Opto-Isolator

    iCOM Control Training and Service Manual Troubleshooting the Output Opto-Isolator The opto-isolator IC chips used in these circuits are the H11J (output) devices. The drawing shows the pin location for component checks on the output opto. The indented circle in the upper left hand corner of this chip indicates the location of Pin 1.
  • Page 153 iCOM Controls Training and Service Manual Troubleshooting the Input Opto-Isolato The opto-isolator IC chips used in these circuits are the H11AA (input) devices. The pin location for component checks on the input opto. The indented circle in the upper left hand corner of this chip indicates the location of Pin 1. Note that the number sequence is in a "U"...
  • Page 154: Unit Control Board: Opto-Isolator/Triac Legends

    iCOM Control Training and Service Manual Microprocessor Control Board: Typical Location othe Opto-Isolators and Triacs Input Opto-Islators Output Opto-Isolators and Triacs Microprocessor Control Board Alarm Input Opto-Isolator Legend: Opto Purpose Opto Purpose Air Safety Switch Power On Custom Alarm 1 Compressor 2 Overload Custom Alarm 2 Low Pressure Switch 2...
  • Page 155 iCOM Controls Training and Service Manual Control Output Opto-Isolator and Triac Legend: Opto Triac Purpose Reheat 1 Reheat 2 Reheat 3 Humidifier Main Fan Humidifier Makeup Valve Liquid Line Solenoid 2 CUV2 or DSV2 * Compressor 2 Liquid Line Solenoid 1 CUV1 or DSV1 * Compressor 1 Not Used...
  • Page 156: Control Input Check (Aquastat Sensor)

    iCOM Control Training and Service Manual Control Input Check (Aquastat Sensor) The iCOM control system may be supplied with the either the Glycool or Dual Cooling option. These options are supplied with an additional sensor to provide an input to the control board. This additional sensor measures either the chilled glycol or chilled water temperature.
  • Page 157: Icom Diagnostics/Service Mode Programs

    iCOM Controls Training and Service Manual iCOM Diagnostics/Service Mode Program The iCOM controller has a valuable tool built into software under the SERVICE MENU. This program allows the user to evacuate and charge the refrigerant circuit during installation, turn on/off all loads (outputs) for testing, and allows user to check all inputs.
  • Page 158: Troubleshooting Checklist

    iCOM Control Training and Service Manual Troubleshooting Checklist 1. Check the obvious before beginning troubleshooting. A. Be sure that a remote control switch has not been shut off. B. Be sure that the communication cable is properly connected. C. Be sure that power is reaching all modules associated with the system. 2.
  • Page 159: Basic Troubleshooting Steps

    iCOM Controls Training and Service Manual Basic Troubleshooting Steps: Example: Unit load is not energizing. Programming: 1. Read and record all program parameter values. 2. Read and record all DIP (control) switch positions on all boards. Check all jumpers on each board, check for the CAN healthy light on the boards and check programming per the read and record sheet in appropriate manuals to verify selected options.
  • Page 160 iCOM Control Training and Service Manual AC Voltage check: 1. Place the digital VOM meter on AC voltage scale and verify that 24 VAC is being applied to the output opto-isolator by placing the VOM between Pin 4 and the proper transformer ground connection. To verify that the switch leg of the output opto-isolator is working properly place the VOM between Pin 6 and the proper transformer ground connection.
  • Page 161: Moisture Content Charts

    iCOM Controls Training and Service Manual Moisture Content Charts The following charts show moisture content of various levels of relative humidity for given temperatures. Follow the procedures below to use the charts: STEP 1: Locate the chart for the temperature with which you are working. STEP 2: Locate the line with the relative humidity value you are using.
  • Page 162 iCOM Control Training and Service Manual Moisture Content at Temperature = 80°F (26.7ºC) Grains Per Cu Ft Grains Per Lb. 3.864 53.59368 3.9744 55.12493 4.0848 56.65618 4.1952 58.18743 4.3056 59.71868 4.416 61.24992 4.5264 62.78116 4.6368 64.31241 4.7472 65.84367 4.8576 67.37492 4.968 68.90616 5.0784...
  • Page 163 iCOM Controls Training and Service Manual Moisture Content at Temperature = 79°F (26.1ºC) Grains Per Cu Ft Grains Per Lb. 3.7485 51.9917 3.8556 53.47717 3.9627 54.96265 4.0698 56.44813 4.1769 57.9336 4.284 59.41908 4.3911 60.90456 4.4982 62.39004 4.6053 63.87551 4.7124 65.36099 4.8195 66.84647 4.9266...
  • Page 164 iCOM Control Training and Service Manual Moisture Content at Temperature = 78°F (25.6ºC) Grains Per Cu Ft Grains Per Lb. 3.633 50.38971 3.7368 51.82942 3.8406 53.26913 3.9444 54.70883 4.0482 56.14854 4.152 57.58824 4.2558 59.02795 4.3596 60.46765 4.4634 61.90736 4.5672 63.34707 4.671 64.78677 4.774801...
  • Page 165 iCOM Controls Training and Service Manual Moisture Content at Temperature = 77°F (25.0ºC) Grains Per Cu Ft Grains Per Lb. 3.521 48.83628 3.6216 50.2316 3.7222 51.62691 3.8228 53.02224 3.9234 54.41756 4.024 55.81288 4.124601 57.20821 4.2252 58.60353 4.3258 59.99885 4.4264 61.39417 4.527 62.78949 4.6276...
  • Page 166 iCOM Control Training and Service Manual Moisture Content at Temperature = 76°F (24.4ºC) Grains Per Cu Ft Grains Per Lb. 3.41215 47.32652 3.50964 48.67871 3.60713 50.03089 3.70462 51.38307 3.80211 52.73527 3.8996 54.08745 3.99709 55.43964 4.09458 56.79182 4.19207 58.14401 4.28956 59.4962 4.38705 60.84838 4.48454...
  • Page 167 iCOM Controls Training and Service Manual Moisture Content at Temperature = 75°F (23.9ºC) Grains Per Cu Ft Grains Per Lb. 3.3068 45.86532 3.40128 47.17575 3.49576 48.48619 3.59024 49.79663 3.68472 51.10707 3.7792 52.4175 3.87368 53.72794 3.96816 55.03838 4.06264 56.34882 4.15712 57.65926 4.251601 58.9697 4.34608...
  • Page 168 iCOM Control Training and Service Manual Moisture Content at Temperature = 74°F (23.3ºC) Grains Per Cu Ft Grains Per Lb. 3.20355 44.43324 3.29508 45.70276 3.38661 46.97228 3.47814 48.2418 3.56967 49.51132 3.6612 50.78085 3.75273 52.05037 3.84426 53.31989 3.93579 54.58941 4.02732 55.85893 4.11885 57.12845 4.21038...
  • Page 169 iCOM Controls Training and Service Manual Moisture Content at Temperature = 73°F (22.8ºC) Grains Per Cu Ft Grains Per Lb. 3.10345 43.04485 3.19212 44.2747 3.28079 45.50456 3.36946 46.73441 3.45813 47.96426 3.5468 49.19412 3.63547 50.42397 3.72414 51.65382 3.81281 52.88367 3.90148 54.11352 3.99015 55.34338 4.07882...
  • Page 170 iCOM Control Training and Service Manual Moisture Content at Temperature = 72°F (22.2ºC) Grains Per Cu Ft Grains Per Lb. 2.9988 41.59336 3.08448 42.78174 3.17016 43.97012 3.25584 45.1585 3.34152 46.34688 3.4272 47.53527 3.51288 48.72365 3.59856 49.91203 3.68424 51.10041 3.76992 52.28879 3.8556 53.47717 3.94128...
  • Page 171 iCOM Controls Training and Service Manual Moisture Content at Temperature = 71°F (21.7ºC) Grains Per Cu Ft Grains Per Lb. 2.91165 40.38459 2.99484 41.53843 3.07803 42.69228 3.16122 43.84613 3.24441 44.99997 3.3276 46.15381 3.41079 47.30766 3.49398 48.46151 3.57717 49.61535 3.66036 50.7692 3.74355 51.92304 3.82674...
  • Page 172 iCOM Control Training and Service Manual Moisture Content at Temperature = 70°F (21.1ºC) Grains Per Cu Ft Grains Per Lb. 2.81925 39.103 2.8998 40.22023 2.98035 41.33746 3.0609 42.45469 3.14145 43.57192 3.222 44.68914 3.30255 45.80637 3.3831 46.9236 3.46365 48.04083 3.5442 49.15806 3.62475 50.27529 3.7053...
  • Page 173 iCOM Controls Training and Service Manual Moisture Content at Temperature = 69°F (20.6ºC) Grains Per Cu Ft Grains Per Lb. 2.7293 37.85539 2.80728 38.93697 2.88526 40.01856 2.96324 41.10014 3.04122 42.18173 3.1192 43.2633 3.19718 44.34489 3.27516 45.42647 3.35314 46.50805 3.43112 47.58964 3.5091 48.67122 3.58708...
  • Page 174 iCOM Control Training and Service Manual Moisture Content at Temperature = 68°F (20.0ºC) Grains Per Cu Ft Grains Per Lb. 2.64985 36.75342 2.72556 37.80352 2.80127 38.85362 2.87698 39.90371 2.95269 40.95381 3.0284 42.00391 3.10411 43.05401 3.17982 44.10411 3.25553 45.1542 3.33124 46.2043 3.40695 47.2544 3.48266...
  • Page 175 iCOM Controls Training and Service Manual Moisture Content at Temperature = 67°F (19.4ºC) Grains Per Cu Ft Grains Per Lb. 2.5578 35.47669 2.63088 36.49031 2.70396 37.50393 2.77704 38.51755 2.85012 39.53116 2.9232 40.54479 2.99628 41.5584 3.06936 42.57202 3.14244 43.58565 3.21552 44.59926 3.2886 45.61288 3.36168...
  • Page 176 iCOM Control Training and Service Manual Moisture Content at Temperature = 66°F (18.9ºC) Grains Per Cu Ft Grains Per Lb. 2.4759 34.34073 2.54664 35.3219 2.61738 36.30306 2.68812 37.28422 2.75886 38.26539 2.8296 39.24655 2.90034 40.22772 2.97108 41.20888 3.04182 42.19005 3.11256 43.17121 3.1833 44.15237 3.25404...
  • Page 177 iCOM Controls Training and Service Manual Moisture Content at Temperature = 65°F (18.3ºC) Grains Per Cu Ft Grains Per Lb. 2.39575 33.22905 2.4642 34.17846 2.53265 35.12785 2.6011 36.07726 2.66955 37.02666 2.738 37.97606 2.80645 38.92546 2.8749 39.87486 2.94335 40.82426 3.0118 41.77366 3.08025 42.72307 3.1487...
  • Page 178: Suction Transducer Information

    iCOM Control Training and Service Manual Suction Transducer Information (Codes A124 & A128) psig psia volts barg bara psig psia volts barg bara -33.5 -18.8 -2.31 -1.29 62.2 76.9 2.55 4.29 5.30 0.05 -2.18 4.42 -31.6 -16.9 -1.16 64.1 78.8 5.43 -29.7 -15.0...
  • Page 179: Digital Scroll High Temperature Sensor Chart

    iCOM Controls Training and Service Manual Digital Scroll High Temperature Sensor Chart NTC (Code S606 and S608)
  • Page 180: Unit Code Configuration And Code Definitions

    iCOM Control Training and Service Manual Unit Code The iCOM control uses a system that auto configures the control board for an individual unit based on options contained within the unit. The unit will have a Unit Configuration Code Tag displayed on the front of the electric panel cover.
  • Page 181 iCOM Controls Training and Service Manual Unit Configuration Code Definition Unit Field Code 001 (Firmware Revision) Code Firmware Field Revision Value Level Unit Field Code 002 (Unit Product Type) Code Product Field Type Value Deluxe Himod Challenger Himod – S XDWP Matrix Process Chiller...
  • Page 182 iCOM Control Training and Service Manual Unit Configuration Code Definition Continued Unit Field Code 003 (Refrigerant Type) Code Refrigerant Field Type Value None R407C R410 R134A R407C/R134A Unit Field Code 004 (Cooling Operation) Code Field Cooling Operation Value Chilled Water Scroll/Rotary, qty 1 Scroll, qty 1 w/ Hot Gas Bypass Scroll, qty 2...
  • Page 183 iCOM Controls Training and Service Manual Unit Configuration Code Definition Continued Unit Field Code 005 (Humidifier Type) Code Humidifier Field Type Value None Canister, On/Off, 200 Volt Canister, On/Off, 208 Volt Canister, On/Off, 230 Volt Canister, On/Off, 380 Volt Canister, On/Off, 415 Volt Canister, On/Off, 460 Volt Canister, On/Off, 575 Volt Canister, Proportional, 200 Volt...
  • Page 184 iCOM Control Training and Service Manual Unit Configuration Code Definition Continued Unit Field Code 006 (Heating Type) Code Field Heating Type Value None 1 Stage Electric 2 Stage Electric 3 Stage Electric (3 Outputs) 3 Stage Electric (2 Outputs) SCR Electric (0 –...
  • Page 185 iCOM Controls Training and Service Manual Unit Configuration Code Definition Continued Unit Field Code 007 (Heat Rejection Type) Code Heat Rejection Field Type Value Air (Lee-Temp) Air (Fanspeed) Air (Lee-Temp) w/ Freecooling Valve Standard Operation Air Fanspeed) w/ Freecooling Valve Standard Operation Air (Lee-Temp) w/ Freecooling Valve Reverse Operation Air (Fanspeed) w/ Freecooling Valve Reverse Operation Water/Glycol...
  • Page 186 iCOM Control Training and Service Manual Unit Configuration Code Definition Continued Unit Field Code 008 (Cooling Valve Travel Time) Code Valve Travel Field Time Value No Valve/NA Valve (On/Off)/NA Valve (0 – 10V)/NA Valve (0.9 – 1.8V)/NA Valve 24V Modulating (62 Seconds) Valve 24V Modulating (74 Seconds) Valve 24V Modulating (90 Seconds) Valve 24V Modulating (165 Seconds)
  • Page 187 iCOM Controls Training and Service Manual Unit Configuration Code Definition Continued Unit Field Code 011, 012, 013, 014 (Customer Input Alarms) Code Field Customer Input Alarms 1(50), 2(51), 3(55), 4(56) Value None (Use Default Setting) Smoke Detected Liquitect Alarm Only Liquitect Shutdown Unit Liquitect Alarm and Lockout Humidifier Make-up Valve Condensate Pump Alarm Only...
  • Page 188 iCOM Control Training and Service Manual Unit Configuration Code Definition Continued Unit Field Code 015 (Dehumidification/Reheat Sequencing) Code Field Dehumidification/Reheat Sequencing Value No Dehumidification Chilled Water Unit Dehumidification 2 Compressors (Two-Stage) Dehumidification: Lockout Reheat 2 Compressors (Two-Stage) Dehumidification: Normal Reheat* 2 Compressors (Two-Stage) Dehumidification: Delayed Reheat #1 Compressors (Single-Stage) Dehumidification: Lockout Reheat #1 Compressors (Single-Stage) Dehumidification: Normal Reheat...
  • Page 189 iCOM Controls Training and Service Manual Unit Configuration Code Definition Continued Unit Field Code 017 Code Reheat/Humidifier Field Lockout and Load Monitor Value No Override If Reheat On, Lockout Humidifier If Humidifier On, Lockout Reheat Load Monitor 120 volts* Load Monitor 230 volts* * Used on XDF Products Only Unit Field Code 018 (Not Used) Code...
  • Page 190: Glossary Of Terms

    iCOM Control Training and Service Manual Glossary of Terms Address: A pattern of characters that identifies a unique storage location Algorithm: A set of procedures to obtain a given result Ambient: Condition on immediately surrounding atmosphere or area: usually refers to temperature or pressure Analog: Refers to circuitry;...
  • Page 191 iCOM Controls Training and Service Manual CPU: Central Processing Unit; the part of a computer system that contains the main storage, arithmetic unit and special register groups (It performs arithmetic operations, controls instruction processing and provides timing signals.) Data: Another name for information Data Bus: One method of input/output for a system where data is moved by way of a group of wires forming a common bus Decrease Button: Control button used to decrease values...
  • Page 192 iCOM Control Training and Service Manual Impedance: Opposition that a circuit offers to the flow of current through it, measured in Ohms Input: An incoming information signal Isolation: Separation of one device or environment from the effects of an adjacent or connected device or environment Lead Compressor: Compressor coming on first as a result of a call for Cooling 1 Lag Compressor: Compressor coming on second as a result of a call for...
  • Page 193 iCOM Controls Training and Service Manual Prefill: The period of time between when the water begins to fill the pan and the humidifier lamps turn on Program: A set of instructions to achieve a certain result PROM: Programmable Read-Only Memory; an Integrated Circuit (IC) memory chip whose stored data can be read at random (The IC can be used only one time.) RAM: Random-Access Memory where work can be written (stored) or read...
  • Page 194: Computer And Network Terms

    iCOM Control Training and Service Manual Computer and Network Terms Agent: A program that performs some information gathering or processing task in the background. Typically, an agent is given a very small and well-defined task. Although the theory behind agents has been around for some time, agents have become more prominent with the recent growth of the Internet.
  • Page 195 iCOM Controls Training and Service Manual Ethernet: A local-area network (LAN) architecture developed by Xerox Corporation in cooperation with DEC and Intel in 1976. Ethernet uses a bus or star topology and supports data transfer rates of 10 Mbps. The Ethernet specification served as the basis for the IEEE 802.3 standard, which specifies the physical and lower software layers.
  • Page 196 iCOM Control Training and Service Manual • wide-area networks (WANs): The computers are farther apart and are connected by telephone lines or radio waves. • campus-area networks (CANs): The computers are within a limited geographic area, such as a campus or military base. •...
  • Page 197 iCOM Controls Training and Service Manual There are a variety of standard protocols from which programmers can choose. Each has particular advantages and disadvantages; for example, some are simpler than others, some are more reliable, and some are faster. From a user's point of view, the only interesting aspect about protocols is that your computer or device must support the right ones if you want to communicate with other computers.
  • Page 198 iCOM Control Training and Service Manual Understanding IP Addressing: Every computer that communicates over the Internet is assigned an IP address that uniquely identifies the device and distinguishes it from other computers on the Internet. An IP address consists of 32 bits, often shown as 4 octets of numbers from 0-255 represented in decimal form instead of binary form.
  • Page 199: Network Information

    iCOM Controls Training and Service Manual Network Information Commonly known as: Network wire, Ethernet cable, Cat5 cable, the information following will explain the connectivity for Liebert Environmental units. Fundamentally, this section will explain the terms of networking so that you can apply the information to building your own network.
  • Page 200 iCOM Control Training and Service Manual inside that allows communication to operate at faster speeds and allow for multiple unit communication. Switches are the latest technology, but you are safe to use either device. d i g i t a l Hubs are available in different Twisted pair - 10baseT - UTP Cable configuration, with 4, 8, 12, 15 or 24 RJ-...
  • Page 201: How To Use The Schematic

    iCOM Controls Training and Service Manual How to Use the Schematic As you look at the outside edge of the electrical schematic (drawing), you will see the numbers 8 through 1 (reading left to right) across the top and bottom and the letters D through A (reading from top to bottom) along both the left and right edges of the schematic.
  • Page 202: Electrical Schematic List

    iCOM Control Training and Service Manual Electrical Schematic List Liebert DS/VS Schematics 182952 DS Board w/ iCOM Control Layout and Plug Assignments 183575 DS iCOM Global Control 8 - 12 Ton 183576 DS iCOM Global Control 15 – 30 Ton, 380 – 575V 183577 DS iCOM Global Control 15 –...
  • Page 203 iCOM Controls Training and Service Manual Notes...

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