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EWWQ090G ÷  EWWQ720L - R410a - Water-cooled scroll chillers 
EWLQ090G   ÷ EWLQ720L   - R410a - Condenser less 
EWHQ100G  ÷ EWHQ400G  - R410a - Heat pump scroll chillers 

Water cooled scroll chillers & heat pump

 

Operation 

 

Manual

 

 
 
 

EWWQ - EWLQ - EWHQ 

Water cooled scroll chiller &heat 
pump 
D-EOMWC01203-15EN

 

 

Operation Manual 

51

 

 

- 

High Pressure: when unit works as chiller or as heat pump with water inversion 

 

Symptom 

Cause 

Solution 

Unit status is Off. 
All circuits are stopped immediately. 
Bell  icon  is  moving  on  controller’s 
display. 
Led on the button 2 of External HMI is 
blinking 
String in the alarm list: 

+UnitOff CndFlwAlm 

String in the alarm log: 

 

UnitOff CndFlwAlm 

String in the alarm snapshot: 

UnitOff CndFlw Alm 
 

 

No  condenser  water  flow  sensed 
continuously or water flow too low. 

Check  the  condenser  water  pump 
filler  and  the  water  circuit  for 
obstructions. 
Check  the  condenser  flow  switch 
calibration  and  adapt  to  minimum 
water flow. 
Check    if  condenser  pump  impeller 
can  rotate  freely  and  it  has  no 
damages. 
Check  condenser  pumps  protection 
devices 

(circuit 

breakers, 

fuses, 

inverters, etc.) 
Check 

condenser 

flow 

switch 

connections. 

 

6.1.3.7  Evaporator Water Freeze Protect alarm 

This alarm is generated to indicate that the evaporator (entering or leaving) water temperature has 
dropped below a safety limit.  

Symptom 

Cause 

Solution 

Unit status is Off. 
All circuits are stopped immediately. 
Bell  icon  is  moving  on  controller’s 
display. 
String in the alarm list: 

+UnitOff EvpFreezeAlm 

String in the alarm log: 

UnitOff EvpFreezeAlm 

String in the alarm snapshot: 

UnitOff EvpFreeze Alm 

 
 

Water flow too low. 

Increase the water flow. 
 

Inlet  temperature  to  the  evaporator  is 
too low. 

Increase the inlet water temperature. 
 

Flow switch is not working or no water 
flow. 

Check  the  flow  switch  and  the  water 
pump. 
 

Refrigerant  temperature  become  too 
low (< -0.6°C). 

Check  the  water  flow  and  filter.  No 
good  heat  exchange  conditions  into 
the evaporator. 

Sensors 

temperature 

readings 

(entering  or  leaving)  are  not  properly 
calibrated 

Check  the  water  temperatures  with  a 
proper  instrument  and  adjust  the 
sensor offsets 

6.1.3.8  Condenser Water Freeze Protect alarm 

This alarm is generated to indicate that the condenser (entering or leaving) water temperature has 
dropped below a safety limit.  

Symptom 

Cause 

Solution 

Unit status is Off. 
All circuits are stopped immediately. 
Bell  icon  is  moving  on  controller’s 
display. 
String in the alarm list: 

+UnitOff CondFreezeAlm 

String in the alarm log: 

UnitOff CondFreezeAlm 

String in the alarm snapshot: 

UnitOff CondFreeze Alm 

 

Water flow too low. 

Increase the water flow. 
 

Inlet  temperature  to  the  condenser  is 
too low. 

Increase the inlet water temperature. 
 

Flow switch is not working or no water 
flow. 

Check  the  flow  switch  and  the  water 
pump. 
 

Refrigerant  temperature  become  too 
low (< -0.6°C). 

Check  the  water  flow  and  filter.  No 
good heat exchange condition into the 
evaporator. 

Sensors 

temperature 

readings 

(entering  or  leaving)  are  not  properly 
calibrated 

Check  the  water  temperatures  with  a 
proper  instrument  and  adjust  the 
sensor offsets 

 

Содержание EWWQ090G

Страница 1: ...croll chillers EWLQ090G EWLQ720L Condenserless EWHQ100G EWHQ400G Heat pump scroll chillers Refrigerant R410A D EOMWC01203 15EN Control operation manual Rev 00 Date Supersedes D EOMHW00107 15EN Water c...

Страница 2: ...ces 6 1 4 Available sensors 8 1 4 1 Pressure transducers 8 1 4 2 Temperature sensors 8 1 4 3 Thermistors 8 1 5 Available Controls 8 1 5 1 Evaporator Condenser pumps 8 1 5 2 Compressors 8 1 5 3 Expansi...

Страница 3: ...Conservation 25 4 2 7 Controller IP setup 25 4 2 8 Menu Password 26 4 3 View Set Circuit 26 4 3 1 Settings 27 4 4 Tmp Setpoints 28 4 5 Temperatures 28 4 6 Available Modes 28 4 7 Timers 29 4 8 Alarms...

Страница 4: ...servation 37 5 2 Unit Circuit Start up 39 5 2 1 Prepare the unit to start 39 5 2 2 Preparing circuits to start 41 5 3 Circuit Capacity Control 42 5 3 1 Low Evaporating Pressure 42 5 3 2 High Condensin...

Страница 5: ...tood and followed Apply all standard safety codes and practices Wear safety glasses and gloves Use the proper tools to move heavy objects Move units carefully and set them down gently 1 2 Avoid electr...

Страница 6: ...itch 1 3 2 Circuit safety devices Safety of this level of severity will shut down the circuit they protect The remaining circuits will keep running 1 3 3 Component safety devices Safety of this level...

Страница 7: ...freezing of the evaporator If the freeze condition will activate when the unit is running all the unit will shut down in alarm while the pump will keep running Alarm will automatically clear when the...

Страница 8: ...es a hazardous temperature 1 5 Available Controls 1 5 1 Evaporator Condenser pumps The controller can regulate one or two evaporator pumps and takes care of automatic change over between pumps It s al...

Страница 9: ...ration of the flow switch must be checked prior to start up the unit 1 6 1 2 Double setpoint This contact can be used to switch between two different LWT setpoints and depending on the application bet...

Страница 10: ...100G EWHQ400G R410a Heat pump scroll chillers Water cooled scroll chillers heat pump Operation Manual Operation Manual 10 EWWQ EWLQ EWHQ Water colled scroll chiller heat pump D EOMWC01203 15EN 1 6 1 8...

Страница 11: ...d outputs The controller can work in accordance with three independent modes Local mode the machine is controlled by commands from the user interface Remote mode the machine is controlled by remote co...

Страница 12: ...min 260 hPa corresponding to max 10 000 m above sea level 2 4 Controller Architecture The overall controller architecture is the following One unit controller I O extensions as needed depending on the...

Страница 13: ...will not operate and the boards may be damaged 2 5 Communication Modules Any of the following modules can be connected directly to the left side of the main controller to allow a BAS or other remote...

Страница 14: ...vailable 1 Inbuilt HMI This HMI is provided of three buttons and one wheel button Alarm status from any page it links with the page with alarm list alarm log and alarm snapshot if available INFO Back...

Страница 15: ...or this reason it is strongly recommended to never power off the unit during winter especially in cold climates 3 2 Browsing When power is applied to the control circuit the HMI screen will be active...

Страница 16: ...l fields the 4 digits password will be entered and if correct the additional settings available with that password level will be disclosed E n t E r P a s s w o r d 2 2 E n t e R P W 5 The password wi...

Страница 17: ...this line is a link Press the button 6 to jump to the next menu Alarms There are two lines here Alarm Active and Alarm Log Alarms are cleared from the Active Alarm link Press the button 6 to jump to...

Страница 18: ...d No Communication to Neuron internal error could be solved by downloading a new LON application Flashing Yellow Communication not possible to the Neuron The Neuron must be configured and set online o...

Страница 19: ...R2032 and it is produced by many different vendors To replace the battery remove the plastic cover of the controller display using a screw driver as shown in the following pictures Be careful to avoid...

Страница 20: ...is turned on shows the units connected to it Highlight the desired unit and press the wheel to access it The remote will automatically show the units attached to it no initial entry is required The R...

Страница 21: ...Password SBTAdmin The following page will be displayed The page is a copy of the onboard HMI and follows the same rules in terms of access levels and structure In addition it allows to trend log a max...

Страница 22: ...G R410a Heat pump scroll chillers Water cooled scroll chillers heat pump Operation Manual Operation Manual 22 EWWQ EWLQ EWHQ Water colled scroll chiller heat pump D EOMWC01203 15EN These software are...

Страница 23: ...it Submenu for circuit data and settings Unit Status Off Unit Loc Rem Sw Auto Auto Mtr Prot Delay Off Ice Mode Tmr Off All Cir Disabled Off Unit Alarm Off Keypad Disable Off BAS Disable Off Unit Loc R...

Страница 24: ...point for unit stage down Max Pulldn 1 7 C min 0 1 2 7 C min Max pull down rate of controlled water temperature Max PullUp 1 7 C min 0 1 2 7 C min Max pull up rate of controlled water temperature Stg...

Страница 25: ...e to set the starting and ending date for the DayLight Saving time DLS if used Setpoint Sub Menu Default Range Description Actual Time 12 00 00 Actual Date 01 01 2014 UTC Diff 60min Difference with UT...

Страница 26: ...o avoid to enter the User password To do this the Password Disable setpoint shall be set to On Setpoint Sub Menu Default Range Description Pwd Disable Off Off On Disable password levels 4 3 View Set C...

Страница 27: ...f the last start Stop Date and time of the last stop Run Hours 0h Running hours of compressor No Of Starts 0 Number of compressor starts Compressor 3 State Off Off On Compressor State Start Date and t...

Страница 28: ...state 4 4 Tmp Setpoints This page allows to set the water temperature setpoints in the several modes For more details refer to the section 5 1 3 Setpoint Sub Menu Default Range Description Cool LWT 1...

Страница 29: ...st of the active alarms Alarm Log History of all the alarms and acknowledges Event Log List of the events Alarm Snapshot List of alarm snapshots with all the relevant data recorded at time the alarm o...

Страница 30: ...ub Menu Default Range Description Low Press Alm 200 0kPa 200 0 630 0kPa Low pressure alarm limit Low Press Hold 670 0kPa 150 0 793 0kPa Low pressure hold limit Low Press Unld 650 0KPa 150 0 793 0kPa L...

Страница 31: ...npt Off Off On Status of the Condenser Flow switch HP Switch Inpt Off Off On Status of the Heat Pump switch PVM GFP Inpt Off Off On Status of Phase Voltage monitor Under Over voltage protection or Gro...

Страница 32: ...rvice Org 4 10 About this Chiller This page resumes all the information needed to identify the unit and the current software version installed These information may be required in case of alarms or un...

Страница 33: ...etting implies an operation with double functioning which is activated through the Cool Heat switch on the electric box Switch COOL The chiller will work in cooling mode with the Cool LWT 1 as the Act...

Страница 34: ...following explanation can be read for Chiller Heat Pump modes Compressors start conditions The control will start the first compressor if the controlled temperature is higher lower than the active set...

Страница 35: ...ntrolled Temperature Setpoint Stage Up DT Last Compressor Off Controlled Temperature Setpoint Shut Dn DT Controlled Temperature Setpoint Shut Dn DT Other Compressor Off Controlled Temperature Setpoint...

Страница 36: ...her for the evaporator either for the condenser Number of pumps and their priority can be set from the menu 4 2 4 Evap Pump Ctrl Set number of active pumps and priority Cond Pump Ctrl Set number of ac...

Страница 37: ...al 4 20 mA signal The table below reports the unit limitation based on the 4 20mA signal Number of compressors Demand Limit Signal mA Maximum unit capacity Maximum number of compressors On 2 12 mA 100...

Страница 38: ...tively in chiller and heat pump mode The following abbreviations are used Setpoint Reset by Evaporator Return Temperature The active setpoint is calculated applying a correction that depends on the ev...

Страница 39: ...e unit will be described All HMI status will be briefly described to allow a better understanding of what is going on into the chiller control 5 2 1 Prepare the unit to start In order to let the unit...

Страница 40: ...or can be all in alarms Check the individual circuit status for further details Unit Alarm A unit alarm is active Check the alarm list to see what is the active alarm inhibiting the unit to start and...

Страница 41: ...cuit is off waiting for the compressor cycle timer to expire All Comp Disable Circuit is off as all compressors are disable Keypad Disable Circuit is off by the local or remote HMI Check with your loc...

Страница 42: ...essure When the circuit is running and the evaporating pressure drops below the safety limits see section 4 9 2 the circuit control logic reacts at two different levels in order to recover the normal...

Страница 43: ...cuit status as Run Cond Press High The status is automatically cleared when the condensing pressure falls below the High Pressure Hold limit by 862 kPa If the condensing pressure rises above the Hi Pr...

Страница 44: ...one cooling tower This means that for the Double circuit unit Dual the common entering leaving condenser water temperature will be controlled 5 5 EXV Control As a standard the unit is equipped with o...

Страница 45: ...e control maintains the superheat close to the Cool SSH target or Heat SSH target depending on the actual operating mode The transition from Superheat Control to Pressure Control may happen only if th...

Страница 46: ...ircuit alarms holding different information to help the failure diagnosis 6 1 1 Unit Warning Alarms 6 1 1 1 External Event This alarm indicate that a device whose operation is linked with this machine...

Страница 47: ...om Cause Solution Unit status is Off All circuits are stopped with a normal shutdown procedure Bell icon is moving on controller s display Led on the button 2 of External HMI is blinking String in the...

Страница 48: ...resistance measurement Sensor is not properly connected open Check for absence of water or humidity on electrical contacts Check for correct plug in of the electrical connectors Check for correct sen...

Страница 49: ...re both green Check if the connector on the side is tightly inserted in the module Module address is not properly set Check if module s address is correct referring to the wiring diagram Module is bro...

Страница 50: ...p can occur from a certain unit cooling capacity level or because of certain working condition i e high values of OAT In these cases the issue can be related with the sizing of power cables There is a...

Страница 51: ...ng in the alarm list UnitOff EvpFreezeAlm String in the alarm log UnitOff EvpFreezeAlm String in the alarm snapshot UnitOff EvpFreeze Alm Water flow too low Increase the water flow Inlet temperature t...

Страница 52: ...onfigured see section 4 9 1 It indicates that the circuit is starting with low outside ambient temperature Symptom Cause Solution Circuit status is Off The circuit is stopped Bell icon is moving on co...

Страница 53: ...s not working properly Check for proper operation of evaporating pressure sensor Compressor on circuit is internally damaged with a mechanical problems for example on internal check valve or on intern...

Страница 54: ...ted in the operational range working envelope of the chiller Excessive charge of refrigerant into the unit Check liquid sub cooling and suction super heat to control indirectly the correct charge of r...

Страница 55: ...to see if there is flash gas Measure sub cooling to see if the refrigerant charge is correct Condensing Setpoint not correct for the application Check if necessary to increase the condensing saturated...

Страница 56: ...ing in the alarm list CxOff EvapPressSen String in the alarm log CxOff EvapPressSen String in the alarm snapshot Cx Off EvapPress Sen Sensor is broken Check for sensor integrity Check correct sensors...

Страница 57: ...chillers EWLQ090G EWLQ720L R410a Condenser less EWHQ100G EWHQ400G R410a Heat pump scroll chillers Water cooled scroll chillers heat pump Operation Manual EWWQ EWLQ EWHQ Water cooled scroll chiller hea...

Страница 58: ...cy reliability or fitness for particular purpose of its content and the products and services presented therein Specifications are subject to change without prior notice Daikin Europe N V explicitly r...

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