Carrier 19XRV User Manual
Page 18

18
Table 5 — ICVC Alarm Codes (cont)
CHILLER PROTECTIVE LIMIT FAULTS (cont)
*[LIMIT] is shown on the ICVC as the temperature, pressure, voltage, etc., set point 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.
ICVC FAULT
STATE
PRIMARY
MESSAGE
SECONDARY
MESSAGE
PRIMARY CAUSE
ADDITIONAL CAUSE/REMEDY
245
PROTECTIVE LIMIT HIGH VFD SPEED
245
Actual VFD Speed
exceeded limit of Target VFD
Speed + 10%.
Actual VFD Speed on COMPRESS screen must
not exceed Target VFD Speed by more than
10%.
246
PROTECTIVE LIMIT INVALID DIFFUSER
CONFIG.
246
Diffuser Control Invalid
Configuration: Check SETUP2
Entries.
Check 25%, 50%, and 75% Guide Vane and Dif-
fuser Load Point entries in SETUP2 screen.
247
PROTECTIVE LIMIT DIFFUSER POSITION
FAULT
247
Diffuser Position Fault:
Check Guide Vane/Diffuser
Actuator.
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 sched-
ule 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 4.3k ohm resistor between CCM termi-
nals J3-7 and J3-8.
Check for electrical noise in CCM Diffuser Pres-
sure wiring. Do not continue to operate com-
pressor except for diagnostic purposes.
248
PROTECTIVE LIMIT SPARE TEMPERATURE
#1
248
Spare Temperature #1
[VALUE] exceeded limit of
[LIMIT]*.
Check Spare Temperature Enable and Spare
Temperature Limit in SETUP1 Screen.
249
PROTECTIVE LIMIT SPARE TEMPERATURE
#2
249
Spare Temperature #2
[VALUE] exceeded limit of
[LIMIT]*.
Check Spare Temperature Enable and Spare
Temperature Limit in SETUP1 Screen.
250
UNUSED
UNUSED 250
Unused State.
251
PROTECTIVE LIMIT VFD CONFIG CONFLICT
251
VFD Config Conflict
(VFD Uploaded): Verify to
Reset Alarm.
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 soft-
ware 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.
252
PROTECTIVE LIMIT VFD CONFIG 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 start indicates guide vane opening
is not less than 4%. Alarm running indicates
guide vane position is < -1% or > 103%, or feed-
back voltage is < .045 or > 3.15 VDC.
254
PROTECTIVE LIMIT VFD CHECKSUM ERROR 254
Checksum Error:
Press Reset to Restore
Configuration
Actual VFD checksum does not match calcu-
lated value.
255
PROTECTIVE LIMIT VFD DEW PREVENTION
255
Dew Prevention - Cool-
ant Too Cold. Check Solenoid
& Cond T.
VFD COLDPLATE TEMP is too close to dew
point based on VFD ENCLOSURE TEMP and
RELATIVE 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.
256
PROTECTIVE LIMIT INDUCTOR OVERTEMP
256
Inductor Overtemp Trip -
Check Temp Switch and Cool-
ing Fans.
Check for cooling fan air flow obstructions.
257
PROTECTIVE LIMIT VFD START INHIBIT
257
VFD Start Inhibit: Check
VFD Diagnostic Parameters
212/214.
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.
258
UNUSED STATE
UNUSED
258
Unused.