Daikin Pathfinder AWV Installation, Operation And Maintenance Manual
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Daikin Pathfinder AWV Installation, Operation And Maintenance Manual

Air-cooled screw chillers
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Installation, Operation,
and Maintenance Manual
Pathfinder
®
Air-cooled Screw Chillers
Model AWV
100 to 565 Tons (350 to 1985 kW)
HFC-134a Refrigerant
60/50 Hz
IOM 1242-8
Group: Chiller
Part Number: IOM1242-8
Date: April 2022

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Do you have a question about the Pathfinder AWV and is the answer not in the manual?

Questions and answers

Timothy Goetsch
March 5, 2025

Evap LWT fault Do I need to check the resistance at the thermistor/ sensor? With the wire unplugged?

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2 comments:
Timothy Goetsch
March 5, 2025

Fault code

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Mr. Anderson
May 14, 2025

Yes. For an Evap LWT Sensor Fault, the resistance must be checked. The fault triggers if the resistance is less than 340 ohms or greater than 300 kΩ, or if the reliability value is anything other than "NoFault." This implies checking the sensor resistance, typically with the wire unplugged.

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Summary of Contents for Daikin Pathfinder AWV

  • Page 1 Installation, Operation, IOM 1242-8 and Maintenance Manual Group: Chiller Part Number: IOM1242-8 Date: April 2022 Pathfinder ® Air-cooled Screw Chillers Model AWV 100 to 565 Tons (350 to 1985 kW) HFC-134a Refrigerant 60/50 Hz...

  • Page 2: Table Of Contents

    Manufactured in an ISO 9001 & ISO 14001 certified facility ©2022 Daikin Applied. Illustrations and data cover the Daikin Applied product at the time of publication and we reserve the right to make changes in design and construction at any time without notice.
  • Page 3 Document Attached: Remote evaporator piping approval (if applicable) Notes: The most common problems delaying start-up and affecting unit reliability are: Field installed compressor motor power supply leads too small. Questions: Contact the local Daikin sales representative*. State size, number and type of conductors and conduits installed:...
  • Page 4 THIS PAGE INTENTIONALLY LEFT BLANK...

  • Page 5: Introduction

    WARNING Polyolester Oil, commonly known as POE oil is a synthetic oil used in many refrigeration systems, and may be present in this Daikin product. POE oil, if ever in contact with PVC/CPVC, will coat the inside wall of PVC/CPVC pipe causing environmental stress fractures.
  • Page 6 ® contained, automatically controlled, liquid-chilling units All Daikin Applied screw chillers must be commissioned by featuring variable speed screw compressors. All model a Daikin Applied service technician or an authorized service AWV chillers are equipped with a single evaporator and provider.

  • Page 7: Installation And Application Considerations

    FOB factory and all claims for handling and 90 INCHES. shipping damage are the responsibility of the consignee. Startup by a Daikin Applied service representative is included on all Pathfinder units sold for installation within the U.S. ®...
  • Page 8 Installation and Application Considerations Mounting Hole Access Figure 2: Representative Rigging - AWV with IWSE Option The inside of the base rail is open to allow access for securing mounting bolts, etc. Mounting location dimensions are given in Dimensional Drawings beginning on page 38.
  • Page 9 Installation and Application Considerations certain circumstances. No solid obstructions are allowed above Case 1: Building or Wall on One Side of Unit the unit at any height, see Case 5 on page 14. If low ambient For most models, maintain a 4 foot minimum from a wall of any temperature operation is expected, optional louvers should be height;...
  • Page 10 Installation and Application Considerations Figure 7: Case 1 for AWV012-014 Models Figure 9: Case 1 for AWV020-024 Models % Full Load Capacity Reduction (AWV012-014) % Full Load Capacity Reduction (AWV020-024) 1.2% 1.4% 4 Feet 4 Feet 1.2% 1.0% 1.0% 0.8% 0.8% 5 Feet 0.6%...
  • Page 11 Installation and Application Considerations Figure 11: Case 1 for AWV 012-014 Models - IWSE Option Figure 13: Case 1 for AWV 020-024 Models - IWSE Option % Full Load Capacity Reduction (AWV020-024) % Full Load Capacity Reduction (AWV012-014) 1.4% 1.2% 5 Feet 5 Feet 1.2%...
  • Page 12 Installation and Application Considerations Case 2: Two Units Side-by-Side Figure 17: Two Units, Side-by-Side For most models, there must be a minimum of 6 feet between two units placed side-by-side; however, performance may be affected at this distance due to air recirculation and elevated condenser pressure.
  • Page 13 Installation and Application Considerations Case 3: Three or More Units, Side-by-Side Figure 22: Case 3 - Power Increase Full Load Power Increase For most models, there must be a minimum of 8 feet between any units placed side-by-side; however, performance may be affected at this distance.
  • Page 14 Installation and Application Considerations Case 4: Open Screening Walls Figure 26: Case 4 - Adjustment Factor Wall Free Area vs . Distance Decorative screening walls are often used to help conceal a unit either on grade or on a rooftop. When possible, design 13.0 these walls such that the combination of their open area 12.0...
  • Page 15 Have any pit installation reviewed by the Daikin Applied sales representative prior to installation to ensure it has sufficient air-flow characteristics and approved by the installation design engineer to avoid risk of accident.
  • Page 16 Installation and Application Considerations Figure 32: Case 5 for AWV020-024 Figure 34: Case 5 for AWV012-014 - IWSE Option Full Load % Capacity Reduction/Power Increase (AWV012-014) Full Load % Capacity Reduction/Power Increase (AWV020-024) 11.0 12.0 11.0 10.0 10.0 Depth of Pit / Wall Height (ft) Depth of Pit / Wall Height (ft) Dist = 8 ft Capacity Dist = 10 ft Capacity...
  • Page 17 Polyolester Oil, commonly known as POE oil is a synthetic oil used in many refrigeration systems, and is present in this Daikin product. POE oil, if ever in contact with PVC/CPVC, will coat the inside wall of PVC/CPVC pipe causing environmental stress fractures.
  • Page 18 Installation and Application Considerations It is recommended that the field installed water piping to the Table 2: Strainer Sizing Data chiller include: Maximum Strainer Strainer Perforation Size Weight Application • Thermometers at the inlet and outlet connections of the Size (in .) in .
  • Page 19 Refer to Daikin Applied Chiller Application Guide, AG 31-003, on a continuous basis by water treatment professionals (see for method of calculating “Minimum Chilled Water Volume”.
  • Page 20 Reducing evaporator flow in proportion to load can reduce • Continuous circulation of water through the chilled water system power consumption. Daikin Applied chillers are piping and evaporator, with ability to control temperature designed for variable water flow duty provided that the rate of within chiller safety limits.
  • Page 21 Consult the work together in hybrid cooling mode. local Daikin Applied sales office for performance outside these temperatures. Leaving chilled fluid temperatures below 40°F (4.4°C) result in evaporating temperatures at or below Figure 42: Hybrid Cooling Mode Operation the freezing point of water and a glycol solution is required.
  • Page 22 Figure for connection port. Daikin supplied relief valve kit provides relief valve with ½” female NPT connection and allows for customer to pipe to blowdown tank or other receptacle as may be required by local building codes.
  • Page 23 NEC guidelines. ® any damage or sources of corrosion. A Daikin Applied service representative must perform an inspection and leak test of Terminals are provided in a unit control panel for optional the unit on a minimum quarterly schedule, to be paid by the field hookup of the control circuit to a separate fused 115-volt owner or contractor.
  • Page 24 Installation and Application Considerations Figure 46: Field Wiring Diagram - Single Point Power PANEL POWER BLOCK CIRCUIT BREAKER (BY OTHERS) DISCONNECT SWITCH 3 PHASE COMPRESSOR(S) POWER AND FAN MOTORS SOURCE OR CIRCUIT 1 EARTH F120 F120 GROUND DISCONNECT (BY OTHERS) FUSE OPTIONAL 20A for 2KVA...
  • Page 25 Installation and Application Considerations Figure 47: Field Wiring Diagram - Multiple Point Power PANEL POWER BLOCK CIRCUIT BREAKER (BY OTHERS) DISCONNECT SWITCH 3 PHASE COMPRESSOR(S) POWER AND FAN MOTORS SOURCE OR CIRCUIT 1 EARTH F120 F120 GROUND Note: Separate grounding is required if fed from different DISCONNECT (BY OTHERS)
  • Page 26 Installation and Application Considerations Figure 48: Representative Refrigerant Diagram - Packaged Unit With Shell & Tube Evaporator Without Optional Economizer IOM 1242-8 • PATHFINDER MODEL AWV CHILLERS www.DaikinApplied.com ®...
  • Page 27 Installation and Application Considerations Figure 49: Representative Refrigerant Diagram - Packaged Unit With Shell & Tube Evaporator With Optional Economizer www.DaikinApplied.com IOM 1242-8 • PATHFINDER MODEL AWV CHILLERS ®...
  • Page 28 Installation and Application Considerations Figure 50: Representative Refrigerant Diagram - Packaged Unit With Braze Plate Evaporator Without Optional Economizer IOM 1242-8 • PATHFINDER MODEL AWV CHILLERS www.DaikinApplied.com ®...
  • Page 29 Installation and Application Considerations Figure 51: Representative Refrigerant Diagram - Packaged Unit With Braze Plate Evaporator With Optional Economizer www.DaikinApplied.com IOM 1242-8 • PATHFINDER MODEL AWV CHILLERS ®...
  • Page 30 Installation and Application Considerations Figure 52: Representative Refrigerant Diagram - Packaged Unit With Optional Integrated Waterside Economizer IOM 1242-8 • PATHFINDER MODEL AWV CHILLERS www.DaikinApplied.com ®...

  • Page 31: Remote Evaporators

    AWV performance data is available from the current version of • Copper (Type L) piping is recommended; carbon steel Daikin Sales Tools or the local sales office. There is a derate to piping is allowed (see Table 9).
  • Page 32 Installation and Application Considerations - Remote Evaporators necessary provided notation is made on schematic to Table 5: Fitting Losses Equivalent Feet of Pipe aid field servicing of equipment. When sourcing cable, 90-Degree 90-Degree Line Size In . Angle Globe Std . Radius Long Radius consideration should be made towards Alpha Wire H1 Valve...
  • Page 33 Installation and Application Considerations - Remote Evaporators colored white, black, green, and red but not necessary terminals 8 and 23 on terminal block M5 in the chiller provided notation is made on schematic to aid field control panel. See Unit Field Wiring Diagrams - Figure servicing of equipment.
  • Page 34 The location and size of the refrigerant connections are shown as separate pieces for field mounting, wiring, and piping. The on dimensional drawings available from a Daikin Applied sales suction shutoff valve is standard on remote evaporator units. representative.
  • Page 35 Installation and Application Considerations - Remote Evaporators Table 7: Sizing Guidelines for Horizontal or Downflow Suction Lines and Liquid Lines Recommended Horizontal or Downflow Suction Line Size Recommended Liquid Line Size Nominal Nominal Circuit Estimated Line Suction Line Circuit Estimated Line Liquid Line Size Capacity TEL (ft)
  • Page 36 Installation and Application Considerations - Remote Evaporators Table 8: Sizing Guidelines for Horizontal or Downflow Suction Lines and Liquid Lines Recommended Horizontal or Downflow Suction Line Size Recommended Liquid Line Sizes Nominal Nominal Circuit Estimated Line Suction Line Circuit Estimated Line Liquid Line Size Capacity TEL (ft)
  • Page 37 Installation and Application Considerations - Remote Evaporators Table 9: Alternate Sizing Guidelines for Horizontal or Table 10: Sizing Guidelines for Upflow Lines Downflow Suction Lines - Steel Recommended Upflow Suction Line Size Recommended Horizontal or Downflow Suction Line Size Nominal Circuit Suction Line Estimated Line Nominal Circuit...

  • Page 38: Dimensional Drawings

    Drawings, dimensional values, and other information may change depending on options or configurations selected. Refer to the as-built submittal drawings provided by a Daikin Applied sales representative for configuration-specific details. Figure 55: Reference Dimensional Drawing - 08 Fan to 14 Fan Configurations With Brazed Plate Evaporator...
  • Page 39 Dimensional Drawings Figure 56: Reference Dimensional Drawing - 12 Fan and 14 Fan Configurations with Shell and Tube Evaporator 87.6 DOES NOT INCLUDE LIFTING LUGS 100.1 WATER INLET CG Y WATER OUTLET CG X CG Z 5.2 BASE FIELD POWER ENTRY FROM RAIL WIDTH BOTTOM FOR SMALL CONTROL BOX (SHOWN),...
  • Page 40 Dimensional Drawings Table 12: Unit Dimensions by Configuration with Shell and Tube Evaporator # OF L1 / L3 / L5 / L7 / M1 / M3 / M5 / M7 / M9 / EVAP D LH D RH CG X CG Y CG Z FANS EV 4027 148.4...

  • Page 41: Isolator Information

    Dimensional Drawings section beginning on page 38 or in the Submittal As-Built Drawings, available from a Daikin Applied sales representative. Submittal As- Built Drawings also specify the correct isolator color for each mounting location, if ordered. When spring isolators are required, install springs under the main unit supports.

  • Page 42: Pressure Drop Data

    Pressure Drop Data Pressure Drop Data Table 13: Evaporator Flow Limits NOTE: Flow rates and pressure drops reflect water only and do not apply to glycol solutions. Minimum Maximum EVAP ft H ft H Figure 62: Model ACH1000DQ Evaporator ACH1000DQ ACH1000DQ-166AH 157.0 528.0...
  • Page 43 Pressure Drop Data Evaporator EV5027 Figure 64: Model EV5027 EV5027A14/07 EV5027A17/05 EV5027F14/08 EV5027F17/06 1100 1300 Flow Rate (gpm) Evaporator EV5039 Figure 65: Model EV5039 EV5039A12/11 EV5039F12/12 Flow Rate (gpm) www.DaikinApplied.com IOM 1242-8 • PATHFINDER MODEL AWV CHILLERS ®...
  • Page 44 Pressure Drop Data Figure 66: Model EV6633 Evaporator EV6633 EV6633A15/07 EV6633F15/08 EV6633F16/06 1000 1200 1400 1600 Flow Rate (gpm) Evaporator EV6639 Figure 67: Model EV6639 EV6639A14/11 EV6639A16/09 EV6639A17/07 EV6639F14/12 EV6639F16/10 EV6639F17/08 1000 1200 1400 1600 Flow Rate (gpm) IOM 1242-8 • PATHFINDER MODEL AWV CHILLERS www.DaikinApplied.com ®...

  • Page 45: Controller Operation

    During a number of extension input/output (I/O) modules, which vary the initial startup of the chiller, the Daikin Applied service depending on the unit size and configuration. The control technician will be available to answer any questions and system provides the monitoring and functions required for the instruct the proper operating procedures.
  • Page 46 Controller Operation System Architecture Modbus Communication - Unit The overall controls architecture uses the following: The unit controller (UC) communicates to the compressor VFD’s and the EXV modules via the Modbus RTU connection • One MicroTech III unit controller ® on the controller itself.
  • Page 47 Controller Operation MicroTech III Inputs/Outputs CC Modules - Circuit #1 and #2 ® Unit Controller - UC Module Table 18: Analog Inputs Description Signal Source Table 14: Analog Inputs Discharge Temperature NTC Thermister (10K@25°C) Description Signal Source Suction Temperature NTC Thermister (10K@25°C) Evap Entering Water Temp NTC Thermister (10K@25°C) Evaporator Pressure...
  • Page 48 Controller Operation Economizer EXV Module RapidRestore Module ® Table 25: Analog Inputs Table 31: Digital Inputs Description Signal Source Description Signal Off Signal On Economizer Pressure Circuit #1 Ratiometric 0.5-4.5 Vdc RapidRestore Lock Out Option Unlock Option Unlock Economizer Temperature Circuit #1 NTC 10K Thermister Backup Chiller Normal Chiller...
  • Page 49 Controller Operation Set Points The following parameters are remembered during power off (permanent memory), are factory set to the Default value, and can be adjusted to any value in the Range column. Unit Level Set Points All of these settings require the unit switch to be off in order to make a change and require rebooting the controller in order to apply a change.
  • Page 50 Controller Operation Table 37: Set Point Default and Range (continued) Description Default Range Waterside Economizer Control Waterside Economizer Option No, Yes Waterside Economizer Enable No, Yes Evaporator Pump Control Evap Pump Control Configuration #1 Only #1 Only, #2 Only, Auto, #1 Primary, #2 Primary Evap Recirc Timer 90 seconds 0 to 300 seconds...
  • Page 51 Controller Operation Table 38: Unit Test Mode Set Points Description Default Range Unit Test Mode Off, On Test Unit Alarm Output Off, On Test Evaporator Pump Output 1 Off, On Test Evaporator Pump Output 2 Off, On NOTE: Unit test mode set points can be changed only when the unit mode is Test. When the unit mode is no longer Test, all unit test mode set points will be changed back to the ‘off’...
  • Page 52 Controller Operation Circuit Level Set Points The settings in this section all exist for each individual circuit. Table 45: Set Points for Individual Circuits Description Default Range Mode, Enabling, Configuration Circuit Mode Enable Disable, Enable, Test Capacity Control Auto Auto, Manual Manual Speed See Note 1 Condenser Control...
  • Page 53 Controller Operation Circuit Test Mode Set Points Circuit test mode set points can be changed when either the unit mode is Test, or the circuit mode is Test. When neither the unit nor the circuit are in Test mode, all the circuit test mode set points for the circuit are automatically changed back to their ‘off’ values. Description Default Range...

  • Page 54: Unit Functions

    Unit Functions Unit Functions Unit Mode Selection Calculations The operating mode of the unit is determined by set points and Evaporator inputs to the chiller. The Available Modes set point determines what modes of operation can be used. This set point also Error determines whether the unit is configured for glycol use.
  • Page 55 Unit Functions Unit Control States T1 - Off to Auto. All of the following are required: • Unit is enabled The unit will always be in one of three states: • No unit alarm requiring shutdown is active 1. Off – Unit is not enabled to run. •...
  • Page 56 Unit Functions Ice Mode Start Delay BAS Annunciation Low Ambient Lockout is not an alarm, but it can be An adjustable start-to-start Ice Cycle Delay timer will limit the annunciated to the BAS as if it is one. When the Low OAT frequency with which the chiller may start in Ice Mode.
  • Page 57 Unit Functions Freeze Protection Table 51: LWT Targets Control Source Available Control To protect the evaporator from freezing, the evaporator pump Mode Modes Source Mode BAS LWT Target Switch will start if the manual reset flow loss alarm is not active and Set Point Set Point Command...
  • Page 58 Unit Functions Unit Capacity Control starts • if starts are equal, it must have the least run hours Unit capacity control will be performed as described in this • if run hours are equal, it must be the lowest numbered section.
  • Page 59 Unit Functions Ice Mode Operation Staging Circuits Off Unit capacity control will command a single circuit to shut down In Ice Mode, running circuits will load up simultaneously at the if both circuits are running and any of the following are true: maximum possible rate that allows for stable operation of the individual circuits.
  • Page 60 Unit Functions RapidRestore ® Enable • WSE EWT sensor fault alarm, WSE Valve Problem alarm, The option allows the capability to restart more quickly and to and WSE Valve Fault alarm are not active load faster than normal when power is lost and restored. •...
  • Page 61 Unit Functions same as they normally do (based on condenser pressure upon entering the Hybrid Cooling Modulation state. After the control). Fans on a circuit NOT running the compressor should cooling state is Hybrid Cooling Modulation for five minutes the all remain off in this state so that the circuit is ready to start as fans on a circuit not running the compressor can start turning needed.

  • Page 62: Circuit Functions

    Circuit Functions Circuit Functions Circuit Functions Table 52: Saturated Condenser Temperature Conditions Components controlled at the circuit level include: Saturated Evap Max Cond Saturated Condition Temp or LWT Temp (°C) • Compressor VFD EXV state is Start LWT ≤ 0°C 1.589 X LWT + 68.3 •...
  • Page 63 Circuit Functions Circuit Availability T1 – Off to Preopen - All of the following are required: • Circuit is available to start per the previous section A circuit is available to start if the following conditions are true: • Adequate pressure in the evaporator and condenser (see •...
  • Page 64 Circuit Functions Circuit Status Compressor Control Circuit Status is displayed to indicate the general condition of The compressor is controlled via: the circuit. The following table lists the text displayed for each • a digital output to give the run command to compressor circuit status and the conditions that enable each status.
  • Page 65 Circuit Functions Capacity Control Load and Unload Delay LWT Error determines the delays for load and unload The compressor will vary capacity via changes to the motor commands. speed (frequency). Auto Capacity Control Table 54: Load and Unload Delay Conditions The normal speed change is 1 Hz for all compressor LWT Error Delay...
  • Page 66 Circuit Functions Condenser Fan Control When circuit state is Start, Run, or Pumpdown, the condenser fan control will be in the Condensing Temperature Control Condenser fan control will vary in operation based on the Fan state. Fan staging and speed will be controlled as needed to VFD Configuration set point.
  • Page 67 Circuit Functions Circuit 2 # Fans 203,205 203,205 203,205 Output 204,206 204,206 204,206 204,206 105,107 207,209 207,209,211 207,209,211,213 106,108 208,210 208,210,212 208,210,212,214 Fan Outputs Per Fan Stage The table below shows which digital outputs are energized for each stage. Table 58: Digital Outputs Energized for Each Stage # Fans On Circuit 1,2,3...
  • Page 68 Circuit Functions VFD on 1st Fan of Each Circuit Staging Up When the saturated condenser temperature is above the Target As an option, the first fan may be driven by a VFD. The VFD + the active deadband, a Stage Up error is accumulated. control will vary the fan speed to drive the saturated condenser temperature to a target value.
  • Page 69 Circuit Functions Staging the target should be allowed to drop by 0.1°C. Increases to the condenser target value will happen as often as the target Calculated RPM is a value used in the fan staging logic. calculation requires. These requirements ensure the running When the circuit run flag is 0, the fan stage is always 0.
  • Page 70 Circuit Functions SSH Target If the unit is configured with liquid line solenoid valves, the EXV position should be 0% when the EXV initially enters the closed The SSH target varies linearly based on discharge superheat state, while it is re-initializing to the zero position. After the (DSH).
  • Page 71 Circuit Functions Operation – Closed State High Water Temperature Capacity Limit The EXV position command should be 0% any time the EXV is If the evaporator LWT is 25°C (77°F) or higher, the circuit in the closed state. The 0% position command also causes the capacity will be limited.

  • Page 72: Alarms And Events

    Alarms and Events Alarms and Events Situations may arise that require some action from the chiller, required to initiate the alarm no longer exist. All alarms and or that should be logged for future reference. The alarm digital groups of alarms can be cleared via the keypad or network output will be operated based on active alarm scenarios as via LON using nviClearAlarms and via BACnet using the shown in the table below.
  • Page 73 Alarms and Events Circuit 2 GFP Fault Evaporator Water Freeze Protect Alarm: Circuit 2 GFP Fault Alarm: Evaporator Water Freeze Protect Displayed Text: C2 Ground Fault Displayed Text: Evap Water Freeze Trigger: All of the following are true: Trigger: Evaporator LWT or EWT equal to or less •...
  • Page 74 Alarms and Events Evaporator EWT Sensor Fault Emergency Stop Alarm: Emergency Stop Alarm: Evaporator EWT Sensor Fault Displayed Text: Emergency Stop Switch Displayed Text: Evap EWT SenFault Trigger: Emergency Stop input off for 1 second Trigger: If any of the following occur for more than one second: Action Taken: Rapid shutdown all circuits and lock out...
  • Page 75 Alarms and Events Evaporator Pump #1 Failure Economizer EXV Module Comm Failure Alarm: Evaporator Pump #1 Failure Alarm: Economizer EXV Module Comm Failure Displayed Text: Evap Pump 1 Fault Displayed Text: EconExvModCommFail Trigger: Unit is configured with primary and backup Trigger: Economizer Configuration set point is set to pumps, pump #1 is running, and the pump...
  • Page 76 Alarms and Events Circuit Alarms Waterside Economizer Valve Fault Alarm: Waterside Economizer Valve Fault Low Evaporator Pressure Displayed Text: WSE Valve Fault Trigger: If the following conditions are true for 90 Alarm: Low Evaporator Pressure seconds the alarm should be triggered: Text: Cn EvapPressLow Trigger: When circuit state = Start and OAT ≥...
  • Page 77 Alarms and Events High Condenser Pressure Mechanical Low Pressure Switch Alarm: Mechanical Low Pressure Switch Alarm: High Condenser Pressure Displayed Text: Cn MLP Switch Displayed Text: Cn CondPressHigh Trigger: The alarm is triggered if all of the following Trigger: Saturated Condenser Temp > Max are true for at least 40 seconds: Saturated Condenser Value for time longer than High Condenser Pressure Delay set...
  • Page 78 Alarms and Events High Discharge Temperature Oil Feed Loss Alarm: High Discharge Temperature Alarm: Oil Feed Loss Displayed Text: Cn DiscTempHigh Displayed Text: Cn Oil Feed Loss Trigger: The following are true for 5 seconds: Trigger: The following are true for 20 second: •...
  • Page 79 Alarms and Events No Pressure At Start Compressor VFD Current Input High Alarm: No Pressure At Start Alarm: High Compressor VFD Input Current Displayed Text: Cn No Press At Start Displayed Text: Cn CmpVFD Curr In Hi Trigger: All of the following must be true to trigger: Trigger: Alarm will trigger when all of the following •...
  • Page 80 Alarms and Events Compressor VFD Comm Failure Compressor VFD Fault Alarm: Compressor VFD Comm Failure Alarm: Compressor VFD Fault Displayed Text: Cn CompVfdCommFail Displayed Cn Comp Vfd Fault Text: Trigger: Unit has compressor VFD’s and there is either a modbus configuration error or there Trigger: F3/F4 compressor types: Fault flag from VFD is are 10 consecutive modbus commands...
  • Page 81 Alarms and Events Condenser Pressure Sensor Fault Action Taken: Normal shutdown of circuit and lock out from running Alarm: Condenser Pressure Sensor Fault Reset: This alarm can be cleared manually via Displayed Text: Cn CondPressSenFault the keypad or BAS command if sensor Trigger: Trigger any time sensor input voltage is input value is 340 Ω...
  • Page 82 Alarms and Events There is only one unit level event, Unit Power Restore. This is Reset: This alarm will automatically clear if value selectable directly from the event log screen. A setting on the reported is from 3.85 to 3083 kPa for 5 Unit Power Restore screen allows selecting which day to show seconds.
  • Page 83 Alarms and Events High Condenser Pressure - Unload High VFD Output Current - Unload Trigger: This event will trigger when the unit mode = Trigger: This event will trigger when all of the following Cool, compressor is running, and saturated are true for at least 3 seconds.
  • Page 84 Alarms and Events High VFD Temperature Hold High VFD Capacitor Current Hold Trigger: This event will trigger when all of the following Trigger: This event will trigger when all of the following are true for at least 3 seconds: are true for at least for 30 seconds. •...

  • Page 85: Using The Controller

    • Technician/Manager level - will be provided at startup • Menu title, displayed in the first line as in Figure • Daikin Applied service technician level • Link (also called Jump) having an arrow ( > ) in the right Enter passwords from the Main Menu: of the line and used to link to the next menu.
  • Page 86 Using the Controller Once a valid password has been entered, the controller allows further changes and access without requiring the user to enter a password until either the password timer expires or a different password is entered. The default value for this password timer is 10 minutes.

  • Page 87: Startup And Shutdown

    Complete the pre-start checklist at the front of without first moving Q1 and Q2 to the “Stop” position, unless this manual and return to Daikin Applied prior to startup date. it is an emergency, as this will prevent the unit from going...
  • Page 88 -20°F. Chilled The thermal dispersion flow switch supplied by Daikin Applied, water piping must be protected with field-installed shown in Figure 1, comes as a 2 part unit consisting of a flow protection.
  • Page 89 Startup and Shutdown Wiring Figure 82: Flow Switch Details Refer to wiring diagram in the unit control panel. Either AC or DC is used to power the flow switch. The unit controller’s digital input is a DC signal which is supplied through the switch output of the flow switch for flow indication.
  • Page 90 Startup and Shutdown Step 1: Adjust flow through the evaporator to the minimum Figure 86: Upper Range of Minimum Flow desired operating gpm. Maintain this flow throughout the setup Step 5: Once procedure. the SP is set, it Step 2: Once steady state minimum desired operating flow is is recommended obtained, perform the ‘Teach’...

  • Page 91: System Maintenance

    Polyolester Oil, commonly known as POE oil is a synthetic oil used in many refrigeration systems, and is present in this Daikin product. POE oil, if ever in contact with PVC/CPVC, will coat the inside wall of PVC/CPVC pipe causing environmental stress fractures.
  • Page 92 In the unlikely occurrence of a coil leak, contact Daikin Applied to receive a replacement coil module. Figure 92: Microchannel Coil Cross Section 4.
  • Page 93 System Maintenance Cleaning Microchannel Aluminum Coils will void the warranty and may result in reduced efficiency and durability in the environment. Maintenance consists primarily of the routine removal of dirt For routine quarterly cleaning, first clean the coil with a coil and debris from the outside surface of the fins.
  • Page 94 Lead-Lag long as the facility and the chiller have power. The only positive freeze protection during power failures is to A feature on all Daikin Pathfinder air-cooled chillers is a ® drain the evaporator and blow out each tube or add the system for alternating the sequence in which the compressors appropriate concentration of glycol to the system.
  • Page 95 System Maintenance Table 65: Preventative Maintenance Schedule Monthly Annual Operation Weekly Quarterly (Note 1) (Note 2) General Complete unit log and review (Note 3) Inspect unit for loose or damaged components and visible leaks Inspect thermal insulation for integrity Clean and paint as required Electrical ( * including the VFDs) Sequence test controls * Check contactors for pitting, replace as required *...
  • Page 96 (collectively “Owner”) that Company, at it’s option, will repair or replace defective parts in the event any product manufactured by Company, including products sold under the brand name Daikin and used in the United States or Canada, proves defective in material or workmanship within twelve (12) months from initial startup or eighteen (18) months from the date shipped by Company, whichever occurs first.
  • Page 97 Now that you have made an investment in modern, efficient Daikin Applied equipment, its care should be a high priority. For training information on all Daikin Applied HVAC products, please visit us at www.DaikinApplied.com and click on Training, or call 540-248-9646 and ask for the Training Department.

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