Carrier AquaEdge 19XRV series Operation, Maintenance And Installation Manual page 103

I. CHILLER PROTECTIVE LIMIT FAULTS (cont)
ICVC
PRIMARY
FAULT
MESSAGE
STATE
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
*[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.
Table 16 — Alarm and Alert Messages (cont)
SECONDARY
MESSAGE
HIGH VFD SPEED 245Actual VFD Speed
exceeded limit of Target VFD
Speed + 10%.
INVALID DIFFUSER 246Diffuser Control Invalid
CONFIG. Configuration: Check SETUP2
Entries.
DIFFUSER POSITION 247Diffuser Position Fault:
FAULT Check Guide Vane/Diffuser
Actuator.
SPARE TEMPERATURE 248Spare Temperature #1
#1 [VALUE] exceeded limit of
[LIMIT]*.
SPARE TEMPERATURE 249Spare Temperature #2
#2 [VALUE] exceeded limit of
[LIMIT]*.
UNUSED 250Unused State.
VFD CONFIG CONFLICT 251VFD Config Conflict
(VFD Uploaded): Verify to
Reset Alarm.
VFD CONFIG CONFLICT 252VFD Config Conflict
(VFD Downloaded): Verify to
Reset Alarm.
GUIDE VANE 253Guide Vane Fault
CALIBRATION [VALUE]. Check Calibration.
VFD CHECKSUM ERROR 254Checksum Error:
Press Reset to Restore
Configuration
VFD DEW PREVENTION 255Dew Prevention - Cool-
ant Too Cold. Check Solenoid
& Cond T.
INDUCTOR OVERTEMP 256Inductor Overtemp Trip
- Check Temp Switch and
Cooling Fans.
VFD START INHIBIT 257VFD Start Inhibit: Check
VFD Diagnostic Parameters
212/214.
UNUSED 258Unused.
PRIMARY CAUSE
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 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.
Check Spare Temperature Enable and Spare
Temperature Limit in SETUP1 Screen.
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 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.
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 feed-
back voltage is < .045 or > 3.15 VDC.
Actual VFD checksum does not match calcu-
lated value.
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.
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.
103
ADDITIONAL CAUSE/REMEDY