Specifications

90
Table 15 — ICVC Primary and Secondary Messages and
Custom Alarm/Alert Messages with Troubleshooting Guides (cont)
I. CHILLER PROTECTIVE LIMIT FAULTS (cont)
STATE
PRIMARY
MESSAGE
SECONDARY
MESSAGE
ALARM MESSAGE
PRIMARY CAUSE
ADDITIONAL
CAUSE/REMEDY
245 PROTECTIVE LIMIT
VFD SPEED OUT
OF RANGE
245->Actual VFD Speed
exceeded limit of Target
VFD Speed ± 10%]*.
Check if ACTUAL VFD SPEED exceeds VFD
SPEED OUTPUT ±10% in COMPRESS
or CAPACITY screen.
See Table 5.
Check for VFD FAULT CODES in VFD_HIST screen.
246 PROTECTIVE LIMIT
INVERTER
OVERCURRENT
246->Inverter Overcurrent Fault:
Check VFD Status
Check LINE CURRENTs and VFD FAULT
CODE in VFD_HIST screen.
See VFD FAULT CODES in Table 16.
247 PROTECTIVE LIMIT
VFD START
INHIBIT
247->VFD Start Inhibit: Check
VFD Diagnostic Parameters
212/214
Check VFD FAULT CODE in VFD_HIST screen.
See VFD FAULT CODES in Table 16.
248 PROTECTIVE LIMIT
SPARE
TEMPERATURE #1
248->Spare Temperature #1
[VALUE] exceeded limit of
[LIMIT]*.
Check component that SPARE TEMPERATURE #1
is monitoring.
See Table 5.
Check SPARE TEMPERATURE #1 settings
in SETUP1 screen.
Check SPARE TEMPERATURE #1 sensor
resistance or voltage drop on CCM terminals
J4-25 and J4-26.
Check SPARE TEMPERATURE #1 sensor wiring.
249 PROTECTIVE LIMIT
SPARE
TEMPERATURE #2
249->Spare Temperature #2
[VALUE] exceeded limit of
[LIMIT]*.
Check component that SPARE TEMPERATURE #2
is monitoring.
See Table 5.
Check SPARE TEMPERATURE #2 settings in
SETUP1 screen.
Check SPARE TEMPERATURE #2 sensor
resistance or voltage drop on CCM terminals
J4-27 and J4-28.
Check SPARE TEMPERATURE #2 sensor wiring.
250 PROTECTIVE LIMIT
REFRIGERANT
LEAK SENSOR
250->Refrigerant Leak
Sensor ppm [VALUE]
exceeded Limit of [LIMIT]*
REFRIGERANT LEAK OPTION is enabled.
The refrigerant leak detector output wired to
CCM terminals J5-5 and J5-6 has reached
the alarm threshold (PPM AT 20 MA).
See Table 5.
Check for leaks.
Check leak detector.
Check REFRIGERANT LEAK OPTION, REFRIG
LEAK ALARM PPM and PPM AT 20 MA settings in
OPTIONS screen.
251 PROTECTIVE LIMIT
VFD CONFIG
CONFLICT
251->VFD Config Conflict;
Verify & Save VFD Config
Data to Reset
VFD Parameters stored in Gateway and ICVC
are not consistent.
Enter VFD_CONF screen and check settings stored
in ICVC against Machine Electrical Data Nameplate.
If parameter values are unacceptable,
exit VFD_CONF by pressing cancel. Re-enter
VFD_CONF screen and check settings uploaded
from Gateway against Machine Electrical Data
Nameplate. Press SAVE before exiting
VFD_CONF.
253 PROTECTIVE LIMIT
VFD CHECKSUM
ERROR
253->Checksum Error:
Press Reset to Restore
Configuration
VFD inverter or rectifier checksum must
be regenerated.
Check VFD FAULT CODE in VFD_HIST screen.
See VFD FAULT CODES in Table 16.
Press RESET softkey on ICVC to restore
VFD configuration.
254 PROTECTIVE LIMIT
VFD DEW
PREVENTION
254->VFD Dew Prevention - VFD
Coolant too Cold, Check Solenoid
and Cond T
Reducing VFD COOLANT FLOW to 0% did not
adequately increase VFD COLDPLATE TEMP.
Check HUMIDITY SENSOR INPUT on CCM J3-7,
J3-9 and J4-10 and RELATIVE HUMIDITY in
POWER or CONTROLS TEST screen.
Check humidity sensor wiring on CCM.
Check VFD refrigerant cooling solenoid operation.
Increase Entering Condenser Liquid Temperature.
Reduce humidity surrounding chiller.
Check that VFD A34 NTC cold plate thermocouple is
wired to VFD A12 AC LINE I/O card TB1-19 and
TB1-20.
255 PROTECTIVE LIMIT
INDUCTOR
OVERTEMP
255->Inductor Overtemp
Tr ip - C h eck Tem p S w it c h
and Cooling Fans
Temperature switch in VFD inductor has opened.
Middle Control Center door must be fully closed
to properly route airflow around VFD inductors.
Check wiring to inductor temperature switch.
Check inductor cooling fan operation.
Check for inductor cooling fan airflow obstructions.
Check VFD FAULT CODE in VFD_HIST screen.
See VFD FAULT CODES in Table 16.
256 VFD GATEWAY
COMPATIBILITY
CONFLICT
256->VFD Gateway Compatibility
Conflict: Check VFG/VFD
Versions
VFD INVERTER VERSION # and/or VFD
RECTIFIER VERSION # are not compatible
with the GATEWAY VERSION #.
Check software version numbers in
VFD_STAT screen.
*[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.