Daikin UAA-ST3M Operation Manual
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Daikin UAA-ST3M Operation Manual

Air -cooled chiller (single screw compressor)
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OPERATION
MANUAL
AIR -COOLED CHILLER
(SINGLE SCREW COMPRESSOR)
UAA-ST3M
OM-UAA-0620(1)-DAIKIN
Part Number: C08019049338

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Summary of Contents for Daikin UAA-ST3M

  • Page 1 OPERATION MANUAL AIR -COOLED CHILLER (SINGLE SCREW COMPRESSOR) UAA-ST3M OM-UAA-0620(1)-DAIKIN Part Number: C08019049338...

  • Page 3: Table Of Contents

    TABLE OF CONTENTS TABLE OF CONTENTS INTRODUCTION 1.1 General DEFINITION ABOUT SAFETY CONTROL PANEL 4.1 System Architecture 4.2 Control Panel Layout 4.3 Controller features 4.4 Main controller OPERATING THE CONTROL SYSTEM 5.1 Start/Stop Unit 5.2 Parameter Viewing and setting UNIT PARAMETERS 6.1 Unit Setpoints TROUBLESHOOTING GUIDE 7.1 Startup Troubleshooting Guide...

  • Page 4: Introduction

    1. INTRODUCTION 1.1 General This manual provides setup, operating, troubleshooting and maintenance information for the DAIKIN Air Cooled Single Screw Chillers listed below with 1 and 2 circuits using MicroTech III Controller. HAZARD IDENTIFICATION INFORMATION ⚠ DANGER Dangers indicate a hazardous situation which will result in death or serious injury if not avoided.
  • Page 5 Operation of this equipment in a residential area can cause harmful interference, in which case the user will be required to correct the interference at the user’s own expense. Daikin disclaims any liability resulting from any interference or for the correction thereof.

  • Page 6: Definition

    2. DEFINITION Active Setpoint The active setpoint is the parameter setting in effect at any given moment. This variation can occur on setpoints that can be altered during normal operation. Resetting the chilled water leaving temperature setpoint by one of several methods such as return water temperature is an example. Active Capacity Limit The active capacity setpoint is the setting in effect at any given moment.
  • Page 7 Stage Up / Stage Down Delta-T Staging is the act of starting or stopping a compressor or fan when another is still operating. Startup and Stop is the act of starting the first compressor or fan and stopping the last compressor or fan. The Delta-T is the “dead band”...

  • Page 8: About Safety

    3. ABOUT SAFETY Electrical installation ⚠ CAUTION • All electrical connections to the machine must be carried out in compliance with laws and regulations in force. • All installation, operating and maintenance activities must be carried out by qualified personnel. •...

  • Page 9: Control Panel

    4. CONTROL PANEL 4.1 System Architecture The MicroTech III control system for air cooled single screw chillers consists of a main unit controller with several extension I/O modules attached depending on the chiller size and configuration. Up to two optional BAS communication modules may be included on request. The overall controls architecture uses the following: •...

  • Page 10: Control Panel Layout

    4.2 Control Panel Layout Item Function Description Turn OFF the unit Q0 (Unit Switch) Turn ON the unit Turn OFF System 1 Q1 (1#SYS SW) Turn ON System 1 Turn OFF System 2 Q2 (2#SYS SW) Turn ON System 2 Indicating working current for 1#SYS Compressor Indicating working current for 2#SYS Compressor Page | 9...

  • Page 11: Controller Features

    4.3 Controller features 1. Display following temperature and pressure readings: i. Entering and leaving chilled water temperature ii. Saturated evaporator refrigerant temperature and pressure iii. Saturated condenser refrigerant temperature and pressure iv. Suction line, and discharge line temperatures – calculated superheat for suction and discharge lines 2.

  • Page 12: Main Controller

    4.4 Main controller 4.4.1 Installation of controller battery Every delivered unit is come with a lithium coin cell 3V battery, packed in a sealable plastic bag as illustrated in figure below: The battery acts as backup power for controller internal memory retention (setting and parameters) when there is power failure.
  • Page 13 4.4.2 Controller layout Item Function Description LED backlight screen Display information or data Alarm Query Press the key to enter alarm menu Shortcut key Return to main menu Return Return to the upper-layer menu Turn Page up while checking / Reduce value while Clockwise parameter setting Turn Anti-...

  • Page 14: Operating The Control System

    5. OPERATING THE CONTROL SYSTEM 5.1 Start/Stop Unit Unit start-up Start-up procedure Steps Description Pre-start check up 1.1 Confirm the unit has been commissioned and ready for operation 1.2 Check whether unit status meet the requirements of start-up. Start-up 2.1 Supply power to the unit 2.2 Turn the Emergency Stop clockwise until it springs up.

  • Page 15: Parameter Viewing And Setting

    Unit shut down Shut down procedure Description Steps Shut down - Circuit To shutdown circuit 1# or circuit 2#, turn the switch of the corresponding circuit to “OFF”. After these operations, the circuit will shut down automatically. Shut down - Unit Turn Q1(1#SYS SW.) and Q2(2#SYS SW.) to OFF Turn Q0 (UNIT SWITCH) to OFF.
  • Page 16 Main Menu Steps Description Press the knob. The password input interface displays. Press the knob and enter the highest digit of the password and press the knob to confirm the entry. Enter other digits in turn in the same way. If the user password is correct, you can view and modify parameters at the user level.
  • Page 17 Setting Temperature Temperature setting procedure Steps Description Enter the user password and choose “View/Set Unit” in main menu then choose “Temperatures”. The following screen displays: Turn the knob clockwise. The following menus display in turn: “Cool LWT 1” indicates the setpoint of evaporator leaving water temperature in cooling mode.
  • Page 18 Quick Menu Quick Menu Steps Description Choose Quick Menu Press the knob to enter the Quick Menu Turn the knob clockwise or anticlockwise to view other parameters in the quick menu. Menu Property Unit Description View the current operation status of the unit.
  • Page 19 Menu Property Unit Description View the actual setpoint of evaporator Active Setpt °C leaving water temperature View the evaporator leaving water Evap LWT °C temperature View the evaporator entering water Evap EWT °C temperature Unit Capacity °C View the capacity of the unit Unit Current View the current of the unit View the softload capacity limitation of...
  • Page 20 View/Set Unit View/Set Unit Steps Description Choose View/Set Unit Press the knob to enter the View/Set Unit Turn the knob clockwise or anticlockwise to view other parameters in the quick menu. User needs to press the enter knob to view details parameters No.
  • Page 21 • Status/Settings Menu Property Unit Description View the current operation status of the Unit Status unit Next Crkt On View the next circuit to be started Next Crkt Off View the next circuit to be stopped Used to enable the unit Chiller Enable Enable: Allow the unit to be started Disable: Prohibit the unit to be started...
  • Page 22 • Set-Up Menu Property Unit Description Set the available modes for the unit: Cool: Cooler only Cool/Ice w/Glycol: Cooler only, Ice Available Storage, Glycol Modes Cool/Heat: Heat Pump Cool/Ice/Heat w/Glycol: Heat Pump Unit, Ice Storage, Glycol Test: Test mode View the start-up temperature Start Up DT °C difference...
  • Page 23 • Temperature Menu Property Unit Description Current evaporator leaving water Evap LWT °C temperature Current evaporator entering water Evap EWT °C temperature View the current difference between the Evap Delta T °C leaving and entering water temperatures of evaporator View the current actual setpoint for Active Setpt °C leaving water temperature of the...
  • Page 24 • Date/Time/Schedule Property Unit Description Actual Time View or set the current time Actual Date View or set the current date View or set chiller operating schedule. The options are as follows: Disable: Schedule OFF En Schedule Enable: Schedule ON When Schedule is enabled, chiller will start or stop by the defined timing.
  • Page 25 Menu Property Unit Description View or set the hour when the quiet mode QM Start Hr takes effect View or set the minute when the quiet QM Start Min mode takes effect View or set the hour when the quiet mode QM End Hr finishes View or set the minute when the quiet...
  • Page 26 Menu Property Unit Description View or set the ambient temperature when it is the maximum adjustment using “Oat” Max Reset OAT °C to adjust the evaporator leaving water temperature setpoint View or set the ambient temperature when adjustment starts using “Oat” to adjust the Strt Reset OAT evaporator leaving water temperature °C...
  • Page 27 View/Set Circuit View/Set Unit Steps Description Choose View/Set Circuit and press the knob to access. Select Circuit#1 or Circuit#2 After selecting circuit #1 or #2, then the key parameters or status of the circuit show. See the following table: User needs to press the enter knob to view details parameters: No.
  • Page 28 • Data Menu Property Unit Description View the evaporating pressure of circuit #1 Evap Pressure or #2. View the condensing pressure of circuit #1 Cond Pressure or #2. View the suction temperature of circuit #1 or Suction Temp °C View the discharge temperature of circuit #1 Discharge Temp °C or /#2.
  • Page 29 Menu Property Unit Description View the mode of circuit #1 or #2. The default value is “Enable”, it means Circuit Mode the corresponding circuit can start Circuit Cap View the capacity of circuit #1 or #2 • Comp 1/2 Menu Property Unit Description...
  • Page 30 Time Until Restart Time Until Restart Steps Description Choose Time Until Restart and press the knob to access. Time left for each circuit will be displayed as follow: Menu Property Unit Description C1 Cycle Tm View the remaining time before compressor Left 1 can be restarted C2 Cycle Tm...
  • Page 31 Schedule Maintenance Schedule Maintenance Steps Description Choose Time Until Restart and press the knob to access. Time left for each circuit will be displayed as follow: Menu Property Unit Description Next Maint View the next maintenance time Support View the telephone number of technical support Reference personnel 30 |...
  • Page 32 About chiller About Chiller Steps Description Choose About Ciller and press the knob to access. Software version and application version will be displayed as follow: Menu Property Unit Description View the BSP version. BSP refers to Board Support Package. The version number must be BSP version 9.20 or higher.

  • Page 33: Unit Parameters

    6. UNIT PARAMETERS 6.1 Unit Setpoints Authorisation Range Factory Default Menu Unit Setting Minimum Maximum 1.View/Set ACSys(Master) 1.1.Status/Settings ACSys Enable Enable Disable Enable Control Source Local Local Network 1.2.Set-Up Start Up DT C Shut Dn DT H Shut Dn DT Stg Up DT Stg Dn DT ℃/min...
  • Page 34 Authorisation Range Unit Factory Default Menu Setting Minimum Maximum #1 Only #2 Only Auto Evp Pmp Ctrl #1 Only #1 Primary #2 Primary Evap Recirc Tm Evap Var Flow Var Fl Unload Adj Evap Nom DT Evap Pmp 1 Hrs 999999 hour Evap Pmp 2 Hrs...
  • Page 35 Range Unit Authorisation Factory Default Menu Setting Minimum Maximum Start Setpoint 15.0 20.0 Stop Setpoint 25.0 20.0 40.0 Water Ele.Heater Disable Disable Enable Ele. Heater Del ℃ Ele. Heater OAT Set -15.0 20.0 ℃ Cool LWT HL 15.0 15.0 35.0 Dfrst Del 60.0 Inhibit Dfrst...
  • Page 36 Range Authorisation Factory Default Unit Menu Setting Minimum Maximum Holiday5 0mon 0day Holiday6 0mon 0day Holiday7 0mon 0day Holiday8 0mon 0day Holiday9 0mon 0day Holiday10 0mon 0day Quiet Mode Disable Disable Enable QM Start Hr hour QM Start Min QM End Hr hour QM End Min QM Cond Offset...
  • Page 37 Range Authorisation Factory Default Unit Menu Setting Minimum Maximum 3.8.Design Conditions Evap Dsn EWT ℃ -64.0 64.0 Evap Dsn LWT Evap Dsn Flow 600000 Evap Dsn Approach Cir#1 Evap Dsn Approach Cir#2 -64.0 64.0 Cond Dsn Approach Cir#1 Cond Dsn Approach Cir#2 Design FL Eff -64.0...
  • Page 38 Range Authorisation Factory Default Unit Menu Setting Minimum Maximum 4.View/Set Circuit #1/#2 4.1.Status/Settings Circuit Mode Enable Disable Enable Service Pumpdn Defrost Time Clr Clr Dfrst Tmr Corresponding Unload Curr Limit 148.0 50.0 to Comp Size 4.2.Comp 1 / 2 Run Hours 999999 hour No.
  • Page 39 Range Authorisation Factory Default Unit Menu Setting Minimum Maximum EXV Configuration Drive Current Hold Current Drive Speed Over Close Steps Over Open Steps Dead Time Sync 、 、 HSS3219 HSS3220 、 、 HSS3221 HSS3222 Comp Size HSS3221 、 、 HSS3223 HSS4224 HSS4225、HSS4226、...
  • Page 40 Range Authorisation Factory Default Unit Menu Setting Minimum Maximum 9.Manual Control 9.1.Unit Manual Control Unit Alarm Out C1 Alarm Out C1 Alarm Out Evap Pump 1 Evap Pump 2 Water Valve Water Ele.Heater HR Pump C1 HR Ele.Heater C2 HR Ele.Heater 9.2.Cir 1/2 Manual Control Test Sld Load1 Test Sld Load2...

  • Page 41: Troubleshooting Guide

    All repair activities on the machine must be carried out solely by qualified personnel who has experience with this type of equipment. DAIKIN is not responsible for any equipment damage, personal injury or death caused by negligence of operators failing to comply with these requirements.
  • Page 42 7.1.2 With Alarm Start-up Troubleshooting – With Alarm Steps Description Choose the Alarms menu in the main menu and press the knob Press the knob to view alarm log and active alarms After entering the Alarm Active menu, you can view the number of alarms and clear alarms.

  • Page 43: Alarm Troubleshooting Guide

    Unit Alarm Records Model: Serial No.: Service Personnel Alarm Information Alarm Time 7.2 Alarm Troubleshooting Guide Menu Solution Check that the phases of the power supply meet UnitOffPhaseVoltageOffNormal the requirements of the unit. Check and make sure the water flow meet UnitOffEvapWaterFlowOffNormal requirement.
  • Page 44 Menu Property Check whether leaving water temperature sensor is working properly. UnitOffEvpLvgWTempFault Check whether leaving water temperature sensor wiring is correct. Start the unit only when the ambient temperature meets the related requirements StartInhbtAmbTempLowLimitActive (cooling > 4°C). C1/2OffStrtFailEvpPrLowLimitActive Check whether there is refrigerant leakage. Check that the working conditions meet therelated requirements.
  • Page 45 Menu Property Check whether there is refrigerant leakage. Check the suction and discharge pressure C1/2 OffNoPressAtStartOffNormal sensors and its wiring. Check the fan speed regulating governor. Check whether compressor control panel and C1/2 OffCmpCtrlrComFailOffNormal the main controller are properly connected. Remarks: •...
  • Page 46 Code: UnitOffPhaseVoltage Alarm Phase Voltage Protection Circuit OffNormal Category: Critical Main controller has power up for 5 sec? Phase protector contact = Open? Trigger Phase protector configuration is “Single point”? Alarm Action Unit immediate shutdown Reset method Manual reset Reset Phase protector contact (NC) = Close for 5 Sec Condition Solution...
  • Page 47 Code: Alarm Evaporator Water Flow Loss UnitOffEvapWaterFlowOffNormal Category: Case 2 Case 1 Critical Evap Pmp Ctrl = #1 Only? Pump is running? Pump runtime ≥ 30 Sec Water flow switch contact = Open? Water flow switch contact Confirm Time = 15 sec? Trigger = Open? Confirm Time...
  • Page 48 Evaporator Water Temperature Code: UnitOffEvapWaterTmp Alarm LoOffNormal Category: Critical Alarm: Evap entering/leaving water UnitOffEvpEntWTempOffNormal / temp sensor = Alarm? UnitOffEvpLvgWTempFault Evap entering/leaving water temp ≤ 2.2 Trigger Confirm Time = 3 sec? Alarm Action Unit immediate shutdown Reset method Manual reset Entering water temp.
  • Page 49 Evap entering water temp sensor Code: UnitOffEvpWTempInvr Alarm and evap leaving water temp sensor tdOffNormal inverted Category: Critical Alarm: Evap entering/leaving water UnitOffEvpEntWTempOffNormal / temp sensor = Alarm? UnitOffEvpLvgWTempFault No. of running compressor ≥ 1? Trigger Evap LWT -Evap EWT > 1.5 Confirm time = 30 sec? Alarm Action...
  • Page 50 Evap leaving water temp sensor Code: UnitOffEvpLvgWTempO Alarm Faulty ffNormal Category: Critical Evap entering water Temp = out of range? Trigger Alarm Action Unit immediate shutdown Reset method Manual reset Reset Evap leaving water temperature in operating range Condition Solution Check sensor condition, wiring and connector condition.
  • Page 51 Alarm Controller Communication Failure Code: AlrmLimCtrlrCommFail Category: Event Main controller power up time = 60 Sec? Trigger Ext. module no communication with Main controller? Alarm Action Unit immediate shutdown Reset method Manual reset Reset Communication between main controller and extension module is established for 5 Condition Solution Check connection between Main controller and extension module...
  • Page 52 Alarm External Event Alarm Code: UnitOffExternalAlarmOffNormal Category: Critical External Fault Cfg = Alarm? External Alarm contact = Open? Trigger Confirm Time = 5 sec? Alarm Action Unit immediate shutdown Reset method Manually reset Reset External alarm contact = Close for 5 Sec Condition Solution Check for field wiring, relay contact and control box internal wire connection.
  • Page 53 Event Alarm Evap entering water temp sensor Code: UnitOffEvpEntWTempO Alarm Faulty ffNormal Category: Critical Evap entering water Temp = out of range? Trigger Alarm Action Unit pump down shutdown Reset method Manual reset Reset Evap entering water temperature in operating range Condition Solution Check sensor condition, wiring and connector condition.
  • Page 54 Code: Alarm Start Inhibit Low Ambient Temp StartInhbtAmbTempLowLimitActive Category: Critical Unit Mode = Cooling? OAT Lockout SP Trigger > Ambient Temperature Alarm Action Unit pump down shutdown if operating, idle Unit not allow to start Reset method Auto reset Reset Ambient temperature >...
  • Page 55 Code: Alarm C# Fan Controller Comm Failure C#OffFnCtlrComFailOffNormal Category: Event Main controller power up time > 60 Sec? Fan ctrl.module Trigger Confirm Time communicate with = 5 sec? Main controller? Alarm Action Unit immediate shutdown Reset method Manual reset Reset Communication between main controller and extension module is established for 5 Condition Check connection between Main controller and extension module...
  • Page 56 Code: Alarm C#Fan Evap Pressure Low Start Fail C#OffStrtFailEvpPrLowLimitActive Category: Event C#Compressor state = ON? Cond. saturated temp < 15.5°C? Trigger Evap pressure < low pressure unload SP? Confirm Time = 60 sec? Alarm Action Corresponding system immediate shutdown Reset method Manual reset Reset C#Evap pressure >...
  • Page 57 Code: Alarm C# Hi Condensing Pressure Off C1#Cmp#OffHighCndPressOffN ormal Category: Event C# Compressor state = ON? C#Cond. saturated temp > Cond. temp alarm SP? Trigger Confirm Time = 5 sec? Alarm Note: Evap sat. temp (°C) Cond. sat. temp alarm SP (°C) 68.3 ≥...
  • Page 58 Code: Alarm C# Low Evap Pressure Off C#Cmp1OffLowEvpPressOffNo rmal Category: Event C#Compressor state = ON? C#Evap. pressure < Evap pressure alarm SP? C#Evap. pressure < Evap pressure unload SP? Trigger Confirm Time = Freeze time delay? Alarm Note: Evap pressure unload = 140 – 150kPa (depends on LWT) Evap pressure alarm SP = 0kPa Freeze time= 20 –...
  • Page 59 C# Compressor# off low compression Code: Alarm ratio C1Cmp1OffPrRatioLoOffNormal Category: Event C#Compressor state = ON? Actual pressure ratio < PrRatio alarm SP? Trigger Confirm Time = 90 sec? Alarm Note: ( ��������.���������������� +101.325 ) [������] Actual pressure ratio = ��������. ���������������� [������] Action Corresponding system pump down shutdown Reset method...
  • Page 60 C# Compressor# off hi mechanical Code: Alarm pressure switch off C#Cmp#OffMechPressHiOffNormal Category: Event Hi mech. sw contact = open? Trigger Confirm Time = 1 sec? Alarm Action Corresponding system pump down shutdown Reset method Manual reset Reset Cond sat. temp < Cond. sat temp Alarm SP Condition Check chiller operating ambient temperature Check condensing coil condition...
  • Page 61 Code: Compressor# discharge Alarm C#Cmp#OffHighDischTmpOffN temperature ormal Category: Event Alarm: Disch temp sensor = Alarm? C#Cmp#OffDischTmpFault C#Compressor state = ON? Trigger Disch temp > Hi Disch temp SP? Alarm Action Corresponding system pump down shutdown Reset method Manual reset Reset Disch temp <...
  • Page 62 C#Compressor# off hi oil pressure Code: Alarm different C#Cmp#OffOilPrDiffHiOffNormal Category: Event C#Compressor state = ON? Actual oil pressure diff. < OilPrDiffHi SP? Trigger Confirm Time = 30 sec? Alarm Note: Actual oil pressure diff. = Discharge pressure – oil pressure Action Corresponding system pump down shutdown Reset method Manual reset...
  • Page 63 Code: Alarm C#Compressor# off starter fault C#Cmp#OffStarterFltOffNormal Category: Event PVM Config = Single Point? Starter fault input = Open? Trigger Confirm Time = 30 sec? Alarm Action Corresponding system immediate shutdown Reset method Manual reset Reset Starter fault input = Open Condition Check starter condition and setting Solution...
  • Page 64 Code: Alarm C# off no pressure change at start C1OffNoPressChgStartOffNormal Category: Event C#Compressor state = ON? Trigger Cond. pressure = Evap pressure? Alarm Action Corresponding system immediate shutdown Reset method Manual reset Reset Condition Check refrigerant leakage Solution Check suction and discharge pressure sensor condition and wiring Page | 63...
  • Page 65 Code: Alarm C# off no pressure at start C#OffNoPressAtStartOffNormal Category: Event C#Compressor state = ON? Evap/Cond. pressure < 35kPa? Trigger VFD unit Alarm Action Corresponding system immediate shutdown Reset method Manual reset Reset Condition Check refrigerant leakage Solution Check discharge and suction pressure transducer condition and its wiring 64 | P a g e...
  • Page 66 Code: Alarm C# off no pressure at start C#OffNoPressAtStartOffNormal Category: Event C#Compressor state = ON? Evap/Cond. pressure < 35kPa? Trigger VFD fan control? Alarm Action Corresponding system immediate shutdown Reset method Manual reset Reset Condition Check refrigerant leakage Solution Check discharge and suction pressure transducer condition and its wiring Page | 65...
  • Page 67 Code: Alarm C# off EXV Controller Comm Failure C#OffEXVCrtlrComFailOffNormal Category: Event Main controller power up time > 60 Sec? EEXV.module Trigger Confirm Time communicate with = 5 sec? Main controller? Alarm Action Unit immediate shutdown Reset method Manual reset Reset Communication between main controller and extension module is established for 5 Condition Check connection between Main controller and EEXV module...
  • Page 68 C#Cmp# Suction Pressure Alarm Code: C#Cmp#OffEvpPressFault Sensor Fault Category: Critical Suction pressure = out of range? Trigger Alarm Action Unit immediate shutdown Reset method Manual reset Reset Suction pressure in operating range Condition Solution Check sensor condition, wiring and connector condition. C#Cmp# Off Discharge Pressure Alarm Code: C#Cmp#OffCndPressFault...
  • Page 69 C#Cmp# Off Oil Feed Pressure Alarm Code: C#Cmp#OilFeedPFault Sensor Fault Category: Critical Oil pressure = out of range? Trigger Alarm Action Unit immediate shutdown Reset method Manual reset Reset Oil pressure in operating range Condition Solution Check sensor condition, wiring and connector condition. C#Cmp# Off Suction Temp.
  • Page 70 C#Cmp# Discharge Temp. Alarm Code: C#Cmp#OffDischTempFault Sensor Fault Category: Critical Discharge temp = out of range? Trigger Alarm Action Unit immediate shutdown Reset method Manual reset Reset Discharge temperature in operating range Condition Solution Check sensor condition, wiring and connector condition. Page | 69...
  • Page 71 C#Cmp# Off Nbr Restart Off Code: Alarm Normal C#Cmp#OffNbrRestartsOffNormal Category: Critical Low ambient application? C#OffStrtFailEvpPrLowLimitActive = Active? Trigger Occurrence counter = 3? Alarm Action Unit immediate shutdown Reset method Manual reset Reset Suction pressure > 35kPa Condition Solution Check refrigerant leakage 70 | P a g e...
  • Page 72 C#Cmp# Off Compressor Motor Hi Code: Alarm Temp Normal C#Cmp#OffMotorTempHiOffNormal Category: Critical Motor protection input = Open? Trigger Confirm Time = 2 sec? Alarm Action Unit immediate shutdown Reset method Manual reset Reset Motor protection input = closed Condition Solution Check refrigerant charge (overcharged) Page | 71...
  • Page 73 C#Cmp# Off Compressor Overload Code: Alarm Normal C#Cmp#CompOverloadOffNormal Category: Critical Motor Overload input = Open? Trigger Confirm Time = 2 sec? Alarm Action Unit immediate shutdown Reset method Manual reset Reset Motor overload input = closed Condition Check ammeter setting as per recommended in wiring diagram Solution Check ammeter wiring and condition Check CT condition and wiring...

  • Page 74: Alarm Clearing

    7.3 Alarm Clearing Clear Alarm Steps Description After entering the Alarm Active menu, you can view the number of alarms and clear alarms. Press the knob to view alarm log and active alarms By turning the knob clockwise or anticlockwise, you can select an alarm. Then press the knob to view the data and time when the alarm is generated 7.4 Alarm Log Clear Alarm...

  • Page 75: Bas Interface

    If an interface module was ordered, one of the following BAS interface installation manuals was shipped with the unit. Contact your local Daikin sales office fora replacement, if necessary. This BAS interface can communicate using Modbus protocol or BACnet protocol.
  • Page 76 Level Register Description Units Data Type Notes Notes <5> 40041 System #1 Evap Pressure psi×10 kPa×10 ℉×10 ℃×10 40042 System #1 Evap Sat Temp. ℉×10 ℃×10 40065 System #1 Suct Temp. ℉×10 ℃×10 40068 System #1 Disch Temp. 40073 System #1 Comp Starts ——...
  • Page 77 Units Level Register Description Data Type Notes Notes <5> Imperial Metric unsigned —— 40772 Unit Actual Status word 40773 System #1 Cond Pressure psi×10 kPa×10 ℉×10 ℃×10 40774 System #1 Cond Sat Temp. 40775 System #1 Evap Pressure psi×10 kPa×10 ——...
  • Page 78 8.2.2 Modbus setup The communication module POL902 should be connected to main controller POL687 as in shown in the picture below: RS485 serial network connection should be ass shown in below figure: BSP and BUS LED on communication module can indicate connection status: Status Description Green On...

  • Page 79: Bacnet Protocol

    8.3 BACnet protocol 8.3.1 BACnet Data Points Level Object Name Object Type Details Unit Notes Instance <4> Chiller On/Off 0: Off (Inactive) ChillerEnableStp 1: On (Active) binary_value Single <1> Clear Unit Alarm 0: Off (Inactive) ClearAlarm 1: On (Active) Evap Flow Status Single 0: Off(Inactive) EvapWaterFlowStatus...
  • Page 80 Level Object Name Object type Details Unit Notes Instance <4> Evap Pump #1 Run Single EvapPump1OperHours Hours Hour Master (precision: 1 Hour) Evap Pump #2 Run Hour EvapPump2OperHours Single Hours (precision: 1 Hour) Chiller Warn Code AVWarningAlarmCode (precision: 1) Chiller Probble AVProblemAlarmCode Code (precision: 1) Chiller Fault Code...
  • Page 81 Level Object Name Object type Details Unit Notes Instance <4> HR LWT2 (precision 0.1℃) HRLwt2 analog_input Single ºC Air-condition System On/Off ACSysEnableStp 0: Off (Inactive) 1: On (Active) Air-condition System Master ACSysMasterEnableStp Master On/Off 0: Off (Inactive) 1: On (Active) Air-condition binary_value System Slave...
  • Page 82 Level Object Name Object type Details Unit Notes Instance <4> System #1 Comp Starts SlaveCir1Starts (precision: 1) System #1 Comp Hour SlaveCir1Hours Run Hours (precision: 1 Hour) System #1 Actual Capacity SlaveCir1TarCap (rang: 0.0%~100.0%) System #1 EXV Position SlaveCir1ExvPos (rang: 0.0%~100.0%) System #2 Comp SlaveCir2Starts...
  • Page 83 Level Object Name Object type Details Unit Notes Instance <4> System #2 Suct SlaveCir2SuctT Temp. ºC (precision: 0.1℃) System #2 Disch SlaveCir2DishT Temp. ºC (precision: 0.1℃) System #2 Oil SlaveCir2OilP Pressure (precision: 0.1kPa) Notes： "R" means "readable","W" means "Writable". <1>The setting is available when "Control Source" is set to "network" in HMI. <2>The details see to the Appendix A.
  • Page 84 ★ The printing may deviate from the real products, please refer to the real object when purchasing. ★ All material is carefully reviewed. In case of any printing errors, DAIKIN bears no responsibility. Models, parameters and performance may change due to product improvement without further notification. Please refer to the nameplate for detail.

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