Carrier 19XRV Start-Up, Operation And Maintenance Instructions Manual page 62

I. CHILLER PROTECTIVE LIMIT FAULTS (continued)
ICVC PRIMARY MESSAGE SECONDARY
FAULT
STATE
243 POTENTIAL FREEZE-
UP
244 POTENTIAL FREEZE-
UP
245 PROTECTIVE LIMIT
246 PROTECTIVE LIMIT
247 PROTECTIVE LIMIT
248 PROTECTIVE LIMIT
249 PROTECTIVE LIMIT
250 UNUSED
251 PROTECTIVE LIMIT
252 PROTECTIVE LIMIT
253 PROTECTIVE LIMIT
254 PROTECTIVE LIMIT
255 PROTECTIVE LIMIT
256 PROTECTIVE LIMIT
257 PROTECTIVE LIMIT
258 UNUSED STATE
259 PROTECTIVE LIMIT
282 PROTECTIVE LIMIT
283 PROTECTIVE LIMIT
284 VFD GATEWAY
285 VFD GATEWAY
286 PROTECTIVE LIMIT
* [LIMIT] is shown on the ICVC as the temperature, pressure, voltage, 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 tripped.
6
Table 10 - Alarm and alert messages (continued)
ALARM MESSAGE PRIMARY
MESSAGE CAUSE
EVAP PRESS/TEMP 243->Evaporator Refrig Temp
TOO LOW [VALUE] exceeded limit of [LIMIT]*.
COND PRESS/TEMP 244->Condenser Refrig Temp
TOO LOW [VALUE] exceeded limit of [LIMIT]*.
HIGH VFD SPEED 245->Actual VFD Speed exceeded
limit of Target VFD Speed ± 10%]*.
INVALID DIFUSER 246->Diffuser Control Invalid Con-
CONFIG. figuration: Check SETUP2 Entries
DIFFUSER 247->Diffuser Position Fault: Check
POSITION FAULT Guide Vane/Diffuser Actuators
SPARE 248->Spare Temperature #1
TEMPERATURE #1 [VALUE] exceeded limit of [LIMIT]*.
SPARE 249->Spare Temperature #2
TEMPERATURE #2 [VALUE] exceeded limit of [LIMIT]*.
UNUSED 250->Unused state
VFD CONFIG 251->VFD Config Conflict (VFD
CONFLICT Uploaded); Verify to Reset Alarm.
VFD CONFIG 252->VFD Config Conflict (VFD
CONFLICT Downloaded); Verify to Reset Alarm.
GUIDE VANE 253->Guide Vane Fault [VALUE].
CALIBRATION Check Calibration
VFD CHECKSUM 254->Checksum Error: Press Reset
ERROR to Restore Configuration
VFD DEW 255->VFD Dew Prevention - VFD
PREVENTION Coolant too Cold, Check Solenoid
and Cond T
INDUCTOR 256->Inductor Overtemp Trip - Check
OVERTEMP Temp Switch and Cooling Fans
VFD START INHIBIT 257->VFD Start Inhibit: Check VFD
Diagnostic Parameters 212/214.
UNUSED 258->Unused
CCN OVERRIDE 259->CCN Emergency/Override
STOP Stop.
INVALID VFD 282->Line Frequency [VALUE]
CONFIG Exceeded Configuration Range.
INVALID VFD 283->Compressor 100%
CONFIG Speed Config Ranges: 50=Hz
45-52; 60 Hz=55-62.
COMPATIBILITY 284->VFD Gateway Compatibil¬ity
CONFLICT Conflict: Check VFG/VFD Versions.
COMPATIBILITY 285->VFD Gateway Compatibil¬ity
CONFLICT Conflict: Check VFG/ICVC Versions.
INVERTER 286->Inverter Overcurrent Fault:
OVERCURRENT Check VFD Status.
ADDITIONAL CAUSE/REMEDY
Check for proper refrigerant charge.
Check float valve operation.
Check for proper fluid flow and temperature.
Confirm that condenser water enters bottom row of condenser tubes first.
Check Evaporator Refrigerant Temperature sensor.
Check for division plate gasket bypass.
Check for fouled tubes.
Condenser water too cold or chiller shut down with brine below 0°C in
cooler so equalization temperature in chiller approached 0°C.
Check condenser pressure transducer.
Check refrigerant charge.
Actual VFD Speed on COMPRESS screen must not exceed Target VFD
Speed by more than 10%.
Check 25%, 50%, and 75% Guide Vane and Diffuser Load Point entries
in SETUP2 screen.
Confirm that Diffuser Option in SETUP 2 screen has not been Enabled if
compressor does not have a split ring diffuser. May indicate rotating stall
condition.
Check rotating stall transducer wiring, accuracy and sealing.
Check diffuser schedule and guide vane schedule in SETUP2 screen.
Check for proper operation of diffuser and inlet guide vane actuators
including inlet guide vane calibration.
Check diffuser actuator coupling for rotational slip.
Check RC snubber on CCM J4-23 and J4-24.
Check 4.3 kOhm resistor between CCM terminals J3-7 and J3-8.
Check for electrical noise in CCM Diffuser Pressure wiring. Do not continue
to operate compressor except for diagnostic purposes.
Check Spare Temperature Enable and Spare Temperature Limit in
SETUP1 Screen.
Check component that SPARE TEMPERATURE #2 is Check Spare
Temperature Enable and Spare Temperature Limit in SETUP1 Screen.
The VFD_CONF table in the Gateway does not match that which is in the
ICVC. This is a normal fault if an ICVC has been uploaded with software
when it was not attached to the CCM. Enter VFD_CONF screen and
then exit VFD_CONF screen by pressing EXIT then CANCEL. Re-enter
the VFD_CONF screen, press EXIT then SAVE. Parameters stored in
the Gateway will be uploaded into the ICVC. Confirm valid settings in
VFD_CONF screen.
The VFD_CONF table in the Gateway does not match that which is in
the ICVC.
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 start indicates
guide vane opening is not less than 4%. Alarm running indicates guide
vane position is < -1% or > 103%, or feedback voltage is < 0.045 or
> 3.15 V d.c.
Actual VFD checksum does not match calculated value.
VFD COLDPLATE TEMP is too close to dew point based on VFD
ENCLOSURE TEMP and RELA¬TIVE HUMIDITY in POWER screen.
Check for moisture in VFD enclosure.
Check Humidity Sensor in CONTROLS TEST.
Check for contamination on CCM J3-7 and J3-9 Humidity Sensor.
Check that VFD refrigerant cooling modulating valve is closing.
Check for cooling fan air flow obstructions.
The VFD Start Inhibit is derived from the Alarm bit being set in the VFD.
The conditions causing the alarm must be corrected in the VFD to
enable subsequent starts and operation. See VFD parameters 212/214.
CCN has signaled the chiller to stop.This fault must be manually reset
from the default screen of the ICVC.
LINE FREQUENCY in POWER screen must be maintained between 45-
52 Hz if LINE FREQ=60Hz? is set to NO (50 Hz). LINE FREQUENCY
must be maintained between 55-62 Hz if LINE FREQ=60Hz? is set to
YES (60 Hz).
Check 2C AUX/HPR Gate Kill circuit.
COMPRESSOR 100% SPEED in VFD_CONF screen must be set
between 45-52 Hz if LINE FREQ=60Hz? is set to NO (50 Hz).
COMPRESSOR 100% SPEED must be set between
55-62 Hz if LINE FREQ=60Hz? is set to YES (60 Hz).
VFD Gateway and VFD software versions are not compatible.
Call Carrier Service.
VFD Gateway and ICVC software versions are not compatible.
Call Carrier Service.
Check for high entering water temperature or low condenser water flow.
Check current settings in VFD_CONF screen.