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Carrier AquaEdge 19XRV series, Руководство по запуску, эксплуатации и техническому обслуживанию

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46

The PRESTART FAULT TIMER provides a timeout if there 
is a prestart alert condition that prevents a chiller from 
starting in a timely manner. If the configured lead chiller 
does not complete its start-up before the PRESTART 
FAULT TIMER (a user-configured value) elapses, then the 
lag chiller starts, and the lead chiller shuts down. The lead 
chiller then monitors the lag, acting as the lead, for a start 
request. The 

PRESTART FAULT TIMER

 parameter is on 

the LEADLAG screen, which is accessed from the EQUIP-
MENT SERVICE table of the SERVICE menu.

If the lag chiller does not achieve start-up before the 

PRE-

START FAULT TIMER

 elapses, the lag chiller stops, and the 

standby chiller is requested to start, if configured and ready.

5.27.3 - Standby chiller configuration and operation

A chiller is designated as a standby chiller when its 

LEAD-

LAG: CONFIGURATION

 value on the LEADLAG screen 

is set to “3.” The standby chiller can operate as a replacement 
for the lag chiller only if one of the other two chillers is in 
an alarm (*) condition (as shown on the ICVC panel). If 
both lead and lag chillers are in an alarm (*) condition, the 
standby chiller defaults to operate in CCN mode and will 
operate based on its configured CCN occupancy schedule 
and remote contacts input.

5.27.4 - Lag chiller start-up requirements

Before the lag chiller can be started, the following conditions 
must be met:
1.  Lead chiller ramp loading must be complete.
.  Lead chilled water temperature must be greater than 

the 

CONTROL POINT

 temperature (see the MAIN-

STAT screen) plus 1/ the 

CHILLED WATER DEAD-

BAND 

temperature (see the SETUP1 screen).

 

NOTE: The chilled water temperature sensor may be 
the leaving chilled water sensor, the return water sen-
sor, the common supply water sensor, or the common 
return water sensor, depending on which options are 
configured and enabled.

3.  Lead chiller 

ACTIVE DEMAND LIMIT

 (see the 

MAINSTAT screen) value must be greater than 95% 
of full load amps.

4.  Lead chiller temperature pulldown rate (

TEMP PULL-

DOWN DEG/MIN

 on the TEMP_CTL screen) of the 

chilled water temperature is less than 0.7 K per minute 
for a sustained period of 100 seconds.

5.  The lag chiller status indicates it is in CCN mode and 

is not in an alarm condition. If the current lag chiller is 
in an alarm condition, the standby chiller becomes the 
active lag chiller, if it is configured and available.

6.  The configured 

LAG START TIMER

 entry has elapsed. 

The 

LAG START TIMER

 starts when the lead chiller 

ramp loading is completed. The 

LAG START TIMER

 

entry is on the LEADLAG screen, which is accessed 
from the EQUIPMENT SERVICE table of the 
SERVICE menu.

When all the above requirements have been met, the lag 
chiller is commanded to a STARTUP mode (indicated by 
“CONTRL” flashing next to the CHILLER START/STOP 
parameter in the MAINSTAT screen). The PIC III control 
then monitors the lag chiller for a successful start. If the lag 
chiller fails to start, the standby chiller, if configured, is started.

5.27.5 - Lag chiller yhutdown Requirements

The following conditions must be met in order for the lag 
chiller to be stopped.
1.  Lead chiller AVERAGE LINE CURRENT or 

MOTOR 

PERCENT KILOWATTS

 (on the MAINSTAT 

screen) is less than the lead chiller percent capacity.

 

NOTE: Lead Chiller Percent Capacity = 115 – 

LAG 

% CAPACITY

. The 

LAG % CAPACITY

 parameter 

is on the LEADLAG screen, which is accessed from 
the EQUIPMENT SERVICE table on the SERVICE 
menu.

.  The lead chiller chilled water temperature is less than 

the 

CONTROL POINT 

temperature (see the MAIN-

STAT screen) plus 1/ the 

CHILLED WATER DEAD-

BAND

 temperature (see the SETUP1 screen).

3.  The configured 

LAG STOP TIMER

 entry has elapsed. 

The 

LAG STOP TIMER

 starts when the lead chiller 

chilled water temperature is less than the chilled water 

CONTROL POINT

 plus 1/ of the 

CHILLED WATER 

DEADBAND

 and the lead chiller compressor motor 

load (

MOTOR PERCENT KILOWATT

 or 

AVERAGE 

LINE CURRENT

 on the MAINSTAT screen) is less 

than the lead chiller percent capacity.

NOTE: Lead Chiller Percent Capacity = 115 – 

LAG % 

CAPACITY

. The 

LAG % CAPACITY

 parameter is on the 

LEADLAG screen, which is accessed from the EQUIP-
MENT SERVICE table on the SERVICE menu.

5.27.6 - Faulted chiller operation 

If the lead chiller shuts down because of an alarm (*) condi-
tion, it stops communicating to the lag and standby chillers. 
After 30 seconds, the lag chiller becomes the acting lead 
chiller and starts and stops the standby chiller, if necessary.

If the lag chiller goes into alarm when the lead chiller is 
also in alarm, the standby chiller reverts to a stand-alone 
CCN mode of operation.

If the lead chiller is in an alarm (*) condition (as shown on 
the ICVC panel), press the 

ReSet

 softkey to clear the 

alarm. The chiller is placed in CCN mode. The lead chiller 
communicates and monitors the RUN STATUS of the lag 
and standby chillers. If both the lag and standby chillers are 
running, the lead chiller does not attempt to start and does 
not assume the role of lead chiller until either the lag or 
standby chiller shuts down. If only one chiller is running, 
the lead chiller waits for a start request from the operating 
chiller. When the configured lead chiller starts, it assumes 
its role as lead chiller.

If the lag chiller is the only chiller running when the lead 
chiller assumes its role as a lead chiller then the lag chiller 
will perform a 

RECOVERY START REQUEST

 (LL_

MAINT screen). The lead chiller will start up when the 
following conditions are met.
1.  Lag chiller ramp loading must be complete.
.  Lag 

CHILLED WATER TEMP

 (MAINSTAT screen) 

is greater than 

CONTROL POINT

 plus 1/ the 

CHILLED WATER DEADBAND

 temperature.

3.  Lag chiller 

ACTIVE DEMAND LIMIT

 value must 

be greater than 95% of full load amps.

Содержание AquaEdge 19XRV series

Страница 1: ...19XRV PIC III Control Hermetic Centrifugal Liquid Chillers Start up operation and maintenance instructions ...

Страница 2: ...ter 35 5 3 Occupancy schedule 35 5 4 Safety controls 36 5 5 Shunt trip 36 5 6 Default screen freeze 36 5 7 Ramp loading control 38 5 8 Capacity override Table 6 39 5 9 High discharge temperature control 39 5 10 Oil sump temperature and pump control 39 5 11 Oil cooler 39 5 12 Remote start stop controls 40 5 13 Spare safety and spare temperature inputs 40 5 14 Alarm trip output contacts 40 5 15 Kilo...

Страница 3: ...tart up 51 6 2 Shutdown sequence 52 6 3 Chilled water recycle mode 53 7 TROUBLESHOOTING GUIDE 54 7 1 Overview 54 7 2 Checking display messages 54 7 3 Checking temperature sensors 54 7 4 Checking pressure transducers 55 7 5 Control algorithms checkout procedure 56 7 6 Control test 56 8 Control Modules 69 APPENDIX 19XRV LIQUIFLO 2 ICVC PARAMETER INDEX 70 ...

Страница 4: ...ire assembly DO NOT work on high voltage equipment unless you are a qualified electrician DO NOT WORK ON electrical components including control panels switches starters or oil heater until you are sure ALL POWER IS OFF and no residual voltage can leak from capacitors or solid state components LOCK OPEN AND TAG electrical circuits during servicing IF WORK IS INTERRUPTED confirm that all circuits a...

Страница 5: ...e disconnect switch es in the control box es If any maintenance operations are carried out on the unit lock the power supply circuit in the open position ahead of the machine If the work is interrupted always ensure that all circuits are still deenergised before resuming the work ATTENTION Even if the unit has been switched off the power circuit remains energised unless the unit or circuit disconn...

Страница 6: ...tart up procedures Procedures in this manual are arranged in the sequence required for proper chiller start up and operation 2 1 Light emitting diodes on boards All boards continuously check and indicate the proper operation of their electronic circuits A light emitting diode LED lights on each board when it is operating properly The red LED flashing for a 2 second period on the NRCP BASE board in...

Страница 7: ...g chilled water temperature The control panel registers cooler condenser and lubricating system pressures shows chiller operating condition and alarm shutdown conditions records the total chiller operating hours sequences chiller start stop and recycle under micro processor control displays the status of the VFD provides access to other CCN Carrier Comfort Network devices and energy management sys...

Страница 8: ...ure differential that exists due to compressor operation After the refrigerant flows past an isolation valve an in line filter and a sight glass moisture indicator the flow is split between motor cooling and oil cooling systems Flow to the motor flows through an orifice and into the motor Once past the orifice the refrigerant is directed over the motor by a spray nozzle The refrigerant collects in...

Страница 9: ...frequency drive motor controller mounted on the condenser This VFD is used with low voltage motors between 380 and 460 V a c It reduces the starting current inrush by controlling the voltage and frequency to the compressor motor Once the motor has accelerated to minimum speed the PIC III modulates the compressor speed and guide vane position to control chilled water temperature Operational paramet...

Страница 10: ...ring Forward motor bearing Labyrinth gas line Oil supply to forward high speed bearing Isolation valve Filter Sight glass Isolation valve Oil skimmer line Filter Eductor Sight glass Oil pump Oil pump motor Oil cooler Isolation valves Pressure transducer TXV bulb Oil filter ...

Страница 11: ...e oil heater while the compressor is off and regulates the hot gas bypass valve if installed The PIC III controls provide critical protection for the compressor motor and control the VFD The PIC III can interface with the Carrier Comfort Network CCN system if desired It can communicate with other PIC I PIC II or PIC III equipped chillers and other CCN devices The PIC III consists of three modules ...

Страница 12: ...r thermistor is located in the base of the evaporator sensing refrigerant temperature directly Evaporator and condenser water side differential pressure transducers are not standard and are not required The ICVC software uses the evaporator satu ration refrigerant temperature in place of differential pres sure flow detection to provide evaporator freeze protection Approach temperatures are shown i...

Страница 13: ...DISPLAY is enabled but the standard CCM connection is retained a differential value of approximately 197 kPa will always be displayed If water side differential pressure transducers are used flow is detected from differential pressure between sensors pressure transducers located in water inlet and outlet nozzles for each heat exchanger The thresholds for flow determination EVAP FLOW DELTA P CUTOUT...

Страница 14: ...wing and modifica tion of the local and CCN time schedules and Ice Build time schedules The SETPOINT menu allows set point adjustments such as the entering chilled water and leaving chilled water set points The SERVICE menu can be used to view or modify information on the Alarm History Control Test Control Algorithm Status Equipment Configuration VFD Configuration data Equipment Service Time and D...

Страница 15: ...CPC01S LOCAL TIME SCHEDULE OCCPC02S ICE BUILD TIME SCHEDULE OCCPC03S CCN TIME SCHEDULE Select a Schedule NEXT PREVIOUS SELECT EXIT 1 2 3 4 5 6 7 8 Override Select a Time Period Override NEXT PREVIOUS SELECT EXIT Modify a Schedule Time INCREASE DECREASE ENTER EXIT ANALOGUE VALUES Add Eliminate a Day ENABLE DISABLE ENTER EXIT DISCRETE VALUES Base Demand Limit LCW Setpoint ECW Setpoint Ice Build Setp...

Страница 16: ...ag Status VFD_HIST VFD Alarm History LOADSHED CUR ALRM Chiller Alarm History WSMDEFME Water System Manager Control Status OCCDEFCM Time Schedule Status Select a table NEXT PREVIOUS SELECT EXIT Select a test NEXT PREVIOUS SELECT EXIT CAPACITY Capacity Control Algorithm OVERRIDE Override Status EXIT LL_MAINT LEADLAG Status WSMDEFME Water System Manager Control Status Maintenance Table Data OCCDEFM T...

Страница 17: ...S NO ENTER EXIT DISCRETE VALUES ATTACH TO NETWORK DEVICE List Network Devices Local Device 6 Device 1 Device 7 Device 2 Device 8 Device 3 Attach To Any Device Device 4 Device 5 Select a Device NEXT PREVIOUS SELECT ATTACH Modify Device Address INCREASE DECREASE ENTER EXIT Use to attach ICVC to another CCN network or device Attach to LOCAL to enter this machine To upload new tables LOG OUT OF DEVICE...

Страница 18: ...NSTAT table shows the actual value of overall chiller status such as CONTROL MODE RUN STATUS AUTO CHILLED WATER RESET and REMOTE RESET SENSOR 1 On the menu screen press STATUS to view the list of point status tables STATUS SCHEDULE SETPOINT SERVICE 2 Press NEXT or PREVIOUS to highlight the desired status table The list of tables is MAINSTAT Overall chiller status STARTUP Status required to perform...

Страница 19: ...ELEASE ENTER Override indication An override value is indicated by SUPVSR SERVC or BEST flashing next to the point value on the STATUS table 4 4 3 Time schedule operation Fig 8 1 On the Menu screen press SCHEDULE STATUS SCHEDULE SETPOINT SERVICE 2 Press NEXT or PREVIOUS to highlight the de sired schedule OCCPC01S LOCAL Time Schedule OCCPC02S ICE Build Schedule OCCPC03S CCN Time Schedule NEXT PREVI...

Страница 20: ...e CONTROL POINT SOURCES LCW or ECW can be active at one time The setpoint that is active is deter mined from the SERVICE menu See the Service Operation section page 49 The ice build ICE BUILD function is also activated and configured from the SERVICE menu 3 Press NEXT or PREVIOUS to highlight the desired setpoint entry NEXT PREVIOUS SELECT EXIT 4 Press SELECT to modify the highlighted setpoint NEX...

Страница 21: ...oint Names preceded by two asterisks can be changed only from the ICVC Reference Point Names in lower case type can be viewed by CCN or BS only by viewing the whole table 7 Alarms and Alerts An asterisk in the far right field of an ICVC status screen indicates that the chiller is in an alarm state an exclamation mark in the far right field of the ICVC screen indicates an alert state The asterisk o...

Страница 22: ...gramming or BACnet Translator use 2 Off 0 Local 1 CCN 2 Reset 3 3 Timeout 0 Ready 1 Recycle 2 Startup 3 Running 4 Demand 5 Ramping 6 Auto Restart 7 Override 8 Tripout 9 Control Test 10 Lockout 11 Pumpdown 12 Prestart 13 4 Normal 0 Alert 1 Alarm 2 5 All variables with capital letter point names are available for CCN read operation Those shown with support write operations for all CCN devices Exampl...

Страница 23: ...en To access this display from the ICVC default screen 1 Press MENU 2 Press STATUS 3 Scroll down to highlight HEAT_EX 4 Press SELECT DESCRIPTION STATUS UNITS POINT Chilled Water Delta P Entering Chilled Water Leaving Chilled Water Chilled Water Delta T Chill Water Pulldown Min Evaporator Refrig Temp Evaporator Pressure Evaporator Approach Condenser Water Delta P Entering Condenser Water Leaving Co...

Страница 24: ...Inverter Temperature Rectifier Temperature VFD Enclosure Temp VFD Cold Plate Temp Humidity Sensor Input Relative Humidity VFD Coolant Flow Actual VFD Speed 0 to 999 0 to 99999 0 to 999 0 to 99999 0 0 to 2 0 0 to 99999 0 to 99999 0 to 99999 0 to 99999 0 0 to 2 0 0 to 99999 0 to 99999 0 to 99999 0 to 99999 0 to 99999 0 to 99999 0 to 99999 0 to 99999 0 to 99999 0 to 99999 0 to 99999 0 to 99999 0 to 9...

Страница 25: ...ALARM NORMAL ALARM NORMAL ALARM NORMAL ALARM NORMAL ALARM NORMAL ALARM NORMAL ALARM NORMAL ALARM NORMAL ALARM NORMAL ALARM FALSE TRUE FALSE TRUE NORMAL ALARM NORMAL ALARM NORMAL ALARM NORMAL ALARM NORMAL ALARM NORMAL ALARM NORMAL ALARM NORMAL ALARM VFD_FLT CYCLE_1 LINEIM_I LINEIM_V PH_REV HI_VOLT LOW_VOLT HI_DCBUS LO_DCBUS MOTIM_I MOTOR_OV RECT_OI RECT_OT RECT_PU INV_OI INV_OT INV_PU GRND_FLT FREQ...

Страница 26: ...1 Press MENU 2 Press SERVICE 3 Scroll down to highlight CONTROL ALGORITHM STATUS 4 Press SELECT 5 Scroll down to highlight CAPACITY DESCRIPTION STATUS UNITS POINT Entering Chilled Water Leaving Chilled Water Capacity Control Control Point Control Point Error ECW Delta T ECW Reset LCW Reset Total Error Resets Guide Vane Delta Target Guide Vane Pos Actual Guide Vane Pos Target VFD Speed Actual VFD S...

Страница 27: ... display from the ICVC default screen 1 Press MENU 2 Press SERVICE 3 Scroll down to highlight CONTROL ALGORITHM STATUS 4 Press SELECT 5 Scroll down to highlight LL_MAINT DESCRIPTION STATUS UNITS POINT Lead Lag Control LEADLAG Configuration Current Mode Load Balance Option LAG Start Time LAG Stop Time Prestart Fault Time Pulldown Delta T Min Satisfied LEAD CHILLER in Control LAG CHILLER Mode Run St...

Страница 28: ... Voltage Reference Flux Current Torque Current Inverter Temperature Rectifier Temperature VFD Enclosure Temp VFD Cold Plate Temp Actual VFD Speed Chiller Fault State VFD Fault Code 0 to 99999 0 to 99999 0 to 99999 0 to 99999 0 to 99999 0 to 99999 0 to 99999 0 to 99999 0 to 99999 0 to 999 0 to 99 0 to 2 0 0 to 100 0 to 100 0 to 2 0 0 to 100 0 to 100 0 to 99999 0 to 99999 0 to 99999 0 to 99999 0 to ...

Страница 29: ...nt names are available for CCN read operation Forcing shall not be supported on maintenance screens Example 15 NET_OPT display screen To access this display from the ICVC default screen 1 Press MENU 2 Press SERVICE 3 Scroll down to highlight EQUIPMENT CONFIGURATION 4 Press SELECT 5 Scroll down to highlight NET_OPT DESCRIPTION STATUS UNITS POINT DEFAULT Loadshed Function Group Number Demand Limit D...

Страница 30: ...lineim_t motim_i motim_t ramp_inc ramp_dec cycdrop 460 60 YES 460 200 100 100 200 100 3456 100 0 102 0 102 0 102 0 0 0 10 10 40 10 40 10 30 30 DSABLE Note Those parameters marked with a shall not be downloaded to the VFD but shall be used in other calculations and algorithms in the ICVC Example 17 OPTIONS display screen To access this display from the ICVC default screen 1 Press MENU 2 Press SERVI...

Страница 31: ...RT TB_ALERT MEDIUM CWDB ERT_TRIP REF_OVER EVAP_AL COND_AL CDFREEZE FLOWDISP EVAP_CUT COND_CUT WFLOW_T oilpr_t rcycr_dt rcycs_dt sp1_en sp1_lim sp2_ en sp2_ lim 93 3 861 71 2 71 2 93 3 79 5 WATER 0 6 0 6 1 7 2 8 3 3 1 1 DSABLE 3 4 3 4 5 40 2 8 0 6 0 118 0 118 Note No variables are available for CCN read or write operation Forcing shall not be supported on service screens Example 19 SETUP2 display s...

Страница 32: ...own to highlight RAMP_DEM DESCRIPTION STATUS UNITS POINT DEFAULT Pulldown Ramp Type Select Temp 0 kW 1 Demand Limit and kW Ramp Demand Limit Source Select Amps 0 kW 1 Amps or kW Ramp Min Demand Limit Prop Band Demand Limit At 20 mA 20 mA Demand Limit Opt Demand Watts Interval 0 1 0 1 5 to 20 3 to 15 40 to 100 0 1 5 to 60 DSABLE ENABLE Minutes ramps1ct dem_src kw_ramp dem_app dem_20ma dem_sel dw_in...

Страница 33: ...city by modulating both motor speed and inlet guide vanes in response to chilled water temperature deviation from the CONTROL POINT see above During operation when the CONTROL POINT is not met within 1 3 of the width of the CHILLED WATER DEADBAND the controller will calculate a GUIDE VANE DELTA which will effect a percentage change to either the guide vane position or TARGET VFD SPEED Factors cons...

Страница 34: ...s is the tolerance range on the chilled water brine temperature control point If the water temperature goes outside the CHILLED WATER DEADBAND the PIC III opens or closes the guide vanes until the temperature is within tolerance The PIC III may be configured with a 0 3 to 1 1 K deadband CHILLED WATER DEADBAND may be viewed or modified on the SETUP1 screen which is accessed from the EQUIPMENT SERVI...

Страница 35: ...WATTS INTERVAL in the SERVICE EQUIPMENT SERVICE RAMP_DEM screen 5 2 Chiller timers and starts counter The PIC III maintains two run time clocks COMPRESSOR ONTIME and SERVICE ONTIME COMPRESSOR ONTIME indicates the total lifetime compressor run hours SERVICE ONTIME is a resettable timer that can be used to indicate the hours since the last service visit or any other event A separate counter tallies ...

Страница 36: ... can define alert limits on various monitored inputs in the SETUP1 screen A partial list of protective safety and alert limits is provided in Table 5 A complete list of alarm and alert messages is provided in the Troubleshooting Guide section page 54 5 5 Shunt trip The function of the shunt trip on the PIC III is to act as a safety trip The shunt trip is wired from the standard I O board to a VFD ...

Страница 37: ...condenser pump relay if CONDENSER REFRIG TEMP CONDENSER FREEZE POINT Deenergises condenser pump relay when CONDENSER REFRIG TEMP CONDENSER FREEZE POINT 2 8 K and ENTERING COND LIQUID CONDENSER FREEZE POINT Configure CONDENSER FREEZE POINT in SETUP1 screen Oil Low Pressure 228 OIL PRESSURE DELTA P 90 kPa and VFD START TRUE Preset Alarm Low Pressure OIL PRESSURE DELTA P 124 kPa and startup complete ...

Страница 38: ...rature 158 159 248 249 SPARE TEMPERATURE SPARE TEMP LIMIT Optional Alarm Alert Configure SPARE TEMP ENABLE and SPARE TEMP LIMIT in SETUP1 screen Guide Vane Position 253 ACTUAL GUIDE VANE POS 4 after 4 minutes of closing Preset Alarm ACTUAL GUIDE VANE POSITION 0 045 V after startup complete Preset Alarm ACTUAL GUIDE VANE POSITION 3 15 V after startup complete Preset Alarm ACTUAL GUIDE VANE POSITION...

Страница 39: ...e the Surge Prevention Algorithm section page 43 5 9 High discharge temperature control If the COMP DISCHARGE TEMP increases above 71 1 C the guide vanes are proportionally opened to increase gas flow through the compressor If the LEAVING CHILLED WATER temperature decreases 2 8 K below the control set point temperature as a result of opening the guide vanes the PIC III will bring the chiller into ...

Страница 40: ...he STARTS IN 12 HOURS parameter on the MAINSTAT screen occur not counting either recycle restarts or auto restarts after power failure an excessive starts alarm displays preventing the chiller from starting The operator must press the RESET softkey on the ICVC to override the starts counter and start the chiller If the chiller records 12 starts excluding recycle starts in a sliding 12 hour period ...

Страница 41: ...denser pump will energise to try to decrease the pressure and Alert 151 will be generated The pump turns off when the condenser pressure is 24 1 kPa less than the pressure over ride and the CONDENSER REFRIG TEMP is within 1 7 K of the ENTERING CONDENSER WATER temperature 5 18 Condenser freeze prevention This control algorithm helps prevent condenser tube freeze up by energizing the condenser pump ...

Страница 42: ...he oil pump will energise for one minute before energising the evaporator pump AUTO RESTART will then continue like a normal start up If power to the ICVC module has been off for more than 3 hours or the timeclock has been set for the first time start the compressor with the slowest TEMP PULLDOWN DEG MIN rate possible in order to minimise oil foaming The oil pump is energised occasionally during t...

Страница 43: ... point moved directly into the surge prevention region In this case investigate the ability of the condenser cooling means e g cooling tower to provide cooling water in accordance with the design load entering condenser water temperature schedule A surge condition occurs when the lift becomes so high the gas flow across the impeller reverses This condition can eventually cause chiller damage When ...

Страница 44: ...cific piece of equipment that is without further control elements or signal conditioning although it may be The head pressure reference output will be on whenever the condenser pump is operating It may also be manually operated in CONTROLS TEST When the head pressure differential is less than the value entered for DELTA P AT 0 the output will be maintained at 4 mA 5 26 Lead lag control The lead la...

Страница 45: ...a designated standby chiller when either the lead or lag chiller is faulted and capacity requirements are not met The lead lag option only operates when the chillers are in CCN mode If any other chiller configured for lead lag is set to the LOCAL or OFF modes it will be unavailable for lead lag operation Lead lag chiller configuration and operation A chiller is designated the lead chiller when its...

Страница 46: ... flashing next to the CHILLER START STOP parameter in the MAINSTAT screen The PIC III control then monitors the lag chiller for a successful start If the lag chiller fails to start the standby chiller if configured is started 5 27 5 Lag chiller yhutdown Requirements The following conditions must be met in order for the lag chiller to be stopped 1 Lead chillerAVERAGE LINE CURRENT or MOTOR PERCENT K...

Страница 47: ...e build schedule can be viewed or modified from the SCHEDULE table From this table select the ice build schedule OCCPC02S screen See Fig 8 and the section on Time Schedule Operation page 19 for more information on modifying chiller schedules The ice build time schedule defines the period s during which ice build is active if the ice build option is enabled If the ice build time schedule overlaps o...

Страница 48: ...ut Ice build operation terminates when the ICE BUILD TERMINATION parameter is set to 1 CONTACTS and the ICE BUILD CONTACTS are open and the ICE BUILD RECYCLE is set to DSABLE 0 In this case the ICE BUILD CONTACTS provide ice level termination control The contacts are used to stop the ice build function when a time period on the ice build schedule OCCPC02S is set for ice build operation The remote ...

Страница 49: ... ATTACH softkey to attach to the LOCAL device and view the chiller operation Fig 13 Example of Attach to Network Device screen 5 30 Service operation An overview of the tables and screens available for the SERVICE function is shown in Fig 7 5 30 1 To access the service screens When the SERVICE screens are accessed a password must be entered 1 From the main MENU screen press the SERVICE softkey The...

Страница 50: ...chiller or CCN device can be configured as the broadcast device The controller that is configured as the broadcaster is the device responsible for transmitting holi day time and daylight savings dates throughout the network To access the BRODEF screen see the SERVICE menu structure Fig 7 To view or change the holiday periods for up to 18 different holidays perform the following operation 1 At the ...

Страница 51: ...ss the CLOSE softkey To end the override select REMOTE CONTACTS INPUT and press the RELEASE softkey Once local start up begins the PIC III performs a series of pre start tests to verify that all pre start alerts and safeties are within the limits shown in Table 6 The RUN STATUS parameter on the MAINSTAT screen line now reads PRE START If a test is not successful the start up is delayed or aborted ...

Страница 52: ...mpressor stops The condenser water pump shuts down at the same time if the ENTERING CONDENSER WATER temperature is greater than or equal to 46 1 C and the CONDENSER REFRIG TEMP is greater than the CONDENSER FREEZE POINT plus 2 8 K The stop to start timer now begins to count down If the start to start timer value is still greater than the value of the start to stop timer then this time displays on ...

Страница 53: ...s the RECYCLE CONTROL RESTART DELTA T in ECW CONTROL and the ENTERING CHILLED WATER temperature is greater than the CONTROL POINT plus the RECYCLE CONTROL RESTART DELTA T Once these conditions are met the compressor initiates a start up with a normal start up sequence An alert condition may be generated if 5 or more recycle start ups occur in less than 4 hours Excessive recycling can reduce chille...

Страница 54: ... expand on the fault description For a complete list of VFD Fault Code Descrip tions and corrective actions see Table 11 NOTE The date format in these tables is MM DD YY If the alarm light starts to flash while accessing a menu screen press the EXIT softkey to return to the default screen to read the alarm message The STATUS screen can also be accessed to determine where an alarm exists A C to the...

Страница 55: ... are at 0 kPa or are open to atmospheric pressure the transducers can be calibrated for zero without removing the transducer from the vessel 3 Access the HEAT_EX screen and view the particular transducer reading the EVAPORATOR PRESSURE or CONDENSER PRESSURE parameter on the HEAT_EX screen To calibrate oil pressure or liquid side flow device view the particular reading CHILLED WATER DELTA P and CON...

Страница 56: ...ntrol override values LL_MAINT LEAD LAG Status Indicates LEAD LAG operation status OCCDEFCM Time Schedules Status The Local and CCN occupied schedules are displayed here to help the operator quickly determine whether the schedule is in the occupied mode or not WSMDEFME Water System Manager Status The water system manager is a CCN module that can turn on the chiller and change the chilled water con...

Страница 57: ...CONTACTS CLOSED Chiller timer countdown complete Unit will proceed to start Remote contact enabled and closed READY TO START IN XX MIN START COMMAND IN EFFECT Chiller START STOP on MAINSTAT manually forced to start Release SUPERVISOR force to start under normal control READY TO START IN XX MIN RECYCLE RESTART PENDING Chiller in recycle mode READY TO START UNOCCUPIED MODE Time schedule for PIC III ...

Страница 58: ...eck for proper VFD cooling fan operation and blockage 111 PRESTART ALERT HIGH INVERTER TEMP 111 Inverter Temperature VALUE exceeded limit of LIMIT Check that VFD refrigerant isolation valves are open Check VFD refrigerant cooling solenoid and refrigerant strainer Check for proper VFD cooling fan operation and blockage LIMIT is shown on the ICVC as the temperature pressure voltage etc setpoint pred...

Страница 59: ...etc setpoint predefined or selected by the operator as an override alert or alarm condition VALUE is the actual pressure temperature voltage etc at which the control is tripped H OUT OF RANGE SENSOR ICVC FAULT STATE PRIMARY MESSAGE SECONDARY MESSAGE PRIMARY CAUSE ADDITIONAL CAUSE REMEDY 260 SENSOR FAULT LEAVING CHILLED WATER 260 Sensor Fault Check Leaving Chilled Water Sensor Check sensor resistan...

Страница 60: ...to ground distribution bus voltage Check VFD fuses Check 24 V a c power supply to ICVC Consult power company 215 PROTECTIVE LIMIT LOW DC BUS VOLTAGE 215 Low DC Bus Voltage VALUE exceeded limit of LIMIT Verify phase to phase and phase to ground line voltage VFD Circuit Board malfunction Call Carrier Service 216 PROTECTIVE LIMIT LINE VOLTAGE IMBALANCE 216 Line Voltage Imbalance Check VFD Fault Histo...

Страница 61: ... valves Confirm that TXV bulb is secured in place and insulated Check for sensor wiring and accuracy This fault can result from extended operation at low load with low water flow to the evaporator or condenser 235 PROTECTIVE LIMIT HIGH CONDENSER PRESSURE 235 Condenser Pressure VALUE exceeded limit of LIMIT Check for high condenser water temperatures low water flow fouled tubes Check for division p...

Страница 62: ... CONFLICT 252 VFD Config Conflict VFD Downloaded Verify to Reset Alarm The VFD_CONF table in the Gateway does not match that which is in the ICVC 253 PROTECTIVE LIMIT GUIDE VANE CALIBRATION 253 Guide Vane Fault VALUE Check Calibration Enter CONTROL TEST and execute Guide Vane Calibration Check CCM guide vane feedback terminals J4 9 and J4 10 Check guide vane feedback potentiometer Alarm before sta...

Страница 63: ...e or voltage drop Check for proper wiring Check for partially closed service valves Check oil cooler TXV Check oil level and oil temperature 151 CONDENSER PRESSURE ALERT PUMP RELAY ENERGISED 151 High Condenser Pressure VALUE Pump Energised to Reduce Pressure Check sensor wiring and accuracy Check condenser flow and water temperature Check for fouled tubes This alarm is not caused by the High Press...

Страница 64: ...ondenser Check that the condenser tubes are not fouled 164 VFD SPEED ALERT LOW VFD SPEED 164 Actual VFD Speed exceeded limit of Target VFD Speed 10 Actual VFD Speed on COMPRESS screen must be at least 90 of Target VFD Speed 165 AUTORESTART PENDING LOW DC BUS VOLTAGE 165 Low DC Bus Voltage VALUE Exceeded Limit of LIMIT Verify phase to phase and phase to ground line voltage 166 AUTORESTART PENDING H...

Страница 65: ...e maximum value of 10 0 seconds Verify connection of current feedback device and motor terminals If fault repeats replace current feedback devices and or power supply 206 36 SW OverCurrent 1 The drive output current has exceeded the software current Check for excess load improper DC boost setting DC brake volts set too high 286 37 Motor I Imbalance 4 Phase current displayed in Imbalance Display 22...

Страница 66: ...unexpected fault Check wiring harness 206 216 Rectifier Ground Fault Excessive ground current measured Check for grounded input wiring 220 217 Rectifier Base Temp Excessive rectifier temperature measured Check for proper temperature and flow rate of coolant 218 218 Rectifier IGBT Temp Excessive calculated IGBT temperature Check for proper temperature and flow rate of coolant 218 219 Rectifier IT O...

Страница 67: ...at Voltage 4 The rectifier did not regulate to the desired bus voltage within the defined time Replace rectifier power board and or rectifier control board 206 238 Rectfr Not Log In 4 Rectifier took too long to connect to inverter a Check the cabling between the communications interface and the two control boards b Connect one DPI device at a time to see if one of the DPI devices is causing the pr...

Страница 68: ...1 3 266 36 1 675 3 134 37 1 629 3 008 38 1 585 2 888 39 1 542 2 773 40 1 499 2 663 41 1 457 2 559 42 1 417 2 459 43 1 377 2 363 Temperature C PIC III voltage drop V Resistance Ohms 44 1 338 2 272 45 1 300 2 184 46 1 263 2 101 47 1 227 2 021 48 1 192 1 944 49 1 158 1 871 50 1 124 1 801 51 1 091 1 734 52 1 060 1 670 53 1 029 1 609 54 0 999 1 550 55 0 969 1 493 56 0 941 1 439 57 0 913 1 387 58 0 887 ...

Страница 69: ...roperly Is lit continuously there is most likely a hardware fault that requires replacing the module Is off continuously the power should be checked Blinks 3 times per second a software error has been discovered and the module must be replaced If there is no input power check the fuses and circuit breaker If the fuse is good check for a shorted secondary of the transformer or if power is present t...

Страница 70: ...S POWER Average Load Current STATUS POWER Base Demand Limit SETPOINT SETPOINT X Baud Rate SERVICE ICVC CONFIGURATION X Broadcast Option SERVICE EQUIPMENT CONFIGURATION NET_OPT X Bus Number SERVICE ICVC CONFIGURATION X Capacity Control SERVICE CONTROL ALGORITHM STATUS CAPACITY Capacity Control SERVICE EQUIPMENT SERVICE SETUP2 CCM Pressure Transducers SERVICE CONTROL TEST CCM Temperature Thermistors...

Страница 71: ... STATUS CAPACITY CONTROL TEST SERVICE Current CHW Setpoint SERVICE CONTROL ALGORITHM STATUS WSMDEFME Current Date SERVICE TIME AND DATE X Current Mode SERVICE CONTROL ALGORITHM STATUS LL_MAINT Current Time SERVICE TIME AND DATE X Date SERVICE TIME AND DATE X Day of Week SERVICE TIME AND DATE X Daylight Savings SERVICE EQUIPMENT CONFIGURATION BRODEF X DC Bus Voltage STATUS POWER DC Bus Voltage SERV...

Страница 72: ... MAINSTAT Ice Build Control SERVICE EQUIPMENT SERVICE OPTIONS Ice Build Option SERVICE EQUIPMENT SERVICE OPTIONS X Ice Build Recycle SERVICE EQUIPMENT SERVICE OPTIONS X Ice Build Setpoint SETPOINT SETPOINT X Ice Build Termination SERVICE EQUIPMENT SERVICE OPTIONS X Ice Build Time Schedule SCHEDULE OCCP02S X Ice Build Time Schedule OCCPC02S SERVICE EQUIPMENT CONFIGURATION OCCDEFCS X ICVC CONFIGURAT...

Страница 73: ... ALGORITHM STATUS VFD_HIST Line Voltage Ph2 ST STATUS POWER Line Voltage Ph2 ST SERVICE CONTROL ALGORITHM STATUS VFD_HIST Line Voltage Ph3 TR STATUS POWER Line Voltage Ph3 TR SERVICE CONTROL ALGORITHM STATUS VFD_HIST Load Balance Option SERVICE CONTROL ALGORITHM STATUS LL_MAINT Load Balance Option SERVICE EQUIPMENT SERVICE LEADLAG X Load Current Ph1 U STATUS POWER Load Current Ph1 U SERVICE CONTRO...

Страница 74: ...ATUS POWER Pressure Transducers Control Test SERVICE CONTROL TEST PRESTART FAULT Time SERVICE CONTROL ALGORITHM STATUS LL_MAINT PRESTART FAULT Timer SERVICE EQUIPMENT SERVICE LEADLAG X PRIMARY MESSAGE DEFAULT SCREEN Proportional Dec Band SERVICE EQUIPMENT SERVICE SETUP2 X Proportional ECW Gain SERVICE EQUIPMENT SERVICE SETUP2 X Proportional Inc Band SERVICE EQUIPMENT SERVICE SETUP2 X Pulldown Ramp...

Страница 75: ...ture 2 SERVICE CONTROL ALGORITHM STATUS LL_MAINT Spare Temperature 2 SERVICE CONTROL TEST THERMITORS STANDBY Capacity SERVICE EQUIPMENT SERVICE LEADLAG X STANDBY Address SERVICE EQUIPMENT SERVICE LEADLAG X STANDBY Chiller Option SERVICE EQUIPMENT SERVICE LEADLAG X STANDBY CHILLER Mode SERVICE CONTROL ALGORITHM STATUS LL_MAINT Start Acceleration Fault STATUS VFD_STAT Start Advance SERVICE EQUIPMENT...

Страница 76: ...NTROL ALGORITHM STATUS VFD_HIST VFD Checksum Error STATUS VFD_STAT VFD Cold Plate Temp STATUS POWER VFD Cold Plate Temp SERVICE CONTROL ALGORITHM STATUS VFD_HIST VFD Comm Fault STATUS VFD_STAT VFD CONFIG PASSWORD SERVICE VFD CONFIG DATA X VFD Coolant Flow STATUS HEAT_EX VFD Coolant Flow STATUS POWER VFD Coolant Solenoid Test SERVICE CONTROL TEST DISCRETE OUTPUTS X VFD Enclosure Temp STATUS POWER V...

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