Specifications

89
Table 15 — ICVC Primary and Secondary Messages and
Custom Alarm/Alert Messages with Troubleshooting Guides (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.
I. CHILLER PROTECTIVE LIMIT FAULTS (cont)
STATE
PRIMARY
MESSAGE
SECONDARY
MESSAGE
ALARM MESSAGE
PRIMARY CAUSE
ADDITIONAL
CAUSE/REMEDY
234 PROTECTIVE LIMIT
LOW OIL
PRESSURE
234->Low Prelube Oil Press [VALUE]:
Check Oil Pump & Filter
Check for low oil level in oil sump sight glass.
See Table 5.
Refrigerant has not been adequately removed
from the oil if bubbling can be observed through
oil sump sight glass.
Check vaporizer and oil sump heaters and
contactors.
Check OIL PRESS VERIFY TIME.
235 PROTECTIVE LIMIT
HIGH CONDENSER
PRESSURE
235->Condenser Pressure
[VALUE] exceeded limit of
[LIMIT]*.
Check for high condenser liquid temperatures
against chiller design conditions.
See Table 5.
Check Condenser Approach in HEATEX screen.
Check for low liquid flow, plugged liquid strainers,
and fouled tubes. Check for division plate/gasket
bypass.
Check for noncondensables in refrigerant.
Check CONDENSER PRESSURE transducer
wiring and accuracy.
Configure COND PRESS OVERRIDE in
SETUP1 screen.
236 PROTECTIVE LIMIT
CCN OVERRIDE
STOP
236->CCN Emergency/Override
Stop
CCN has signaled the chiller to stop.
EMERGENCY STOP in the MAINSTAT
screen has been set to EMSTOP.
Reset and restart when ready. If the
signal was sent by the ICVC, release the
stop signal on the STATUS01 table.
237 PROTECTIVE LIMIT
SPARE SAFETY
DEVICE
237->Spare Safety Device
Spare safety input has tripped or factory-installed
jumper is not present between terminals 19 and
20 on the Low Voltage Field Wiring Terminal Strip.
238 PROTECTIVE LIMIT
COMPRESSOR
MOTOR STALL
238->Compressor Stall:
Check Compressor and Motor
Check condenser liquid flow and temperatures
against chiller design conditions.
See Table 5.
Check STALL TIME PERIOD and STALL %
AMPs settings.
Check for excessive refrigerant charge and
oil loss.
239 PROTECTIVE LIMIT
TRANSDUCER
VOLTAGE FAULT
239->Transducer Voltage Ref
[VALUE] exceeded limit of
[LIMIT]*.
Check If CCM PRESSURE TRANSDUCER
VOLTAGE REFERENCE is less than 4.5 V
in CONTROLS TEST screen.
Confirm PRESSURE TRANSDUCER VOLTAGE
REFERENCE across a CCM Pressure Transducer
(e.g., CCM J3-1 to J3-3).
Confirm that none of the transducers have
been shorted to ground.
Look for changes in voltage if customer wiring
to CCM J5-1 through J5-6 and J8-1 to J8-2 are
temporarily removed.
Check for 24 VAC across CCM terminals
J1-1 and J1-2.
240 VFD GATEWAY
COMPATIBILITY
CONFLICT
240->VFD Gateway Compatibility
Conflict: Check VFG/ICVC
Versions
ICVC and Gateway software compatibility numbers
do not match. See ICVC SOFTWARE PART # in
ICVC CONFIGURATION SCREEN.
See VFD GATEWAY VERSION # in VFD_STAT
screen.
241 PROTECTIVE LIMIT
RECTIFIER
OVERCURRENT
241->Rectifier Overcurrent Fault:
Check VFD Status
Check LOAD CURRENT and VFD FAULT
CODE in VFD_HIST screen.
See VFD FAULT CODES in Table 16.
242 LOSS OF COMMUNICATION
WITH CCM
MODULE
242->Loss of Communication
With CCM: Check Comm.
Connectors
Check wiring and connectors between CCM
terminal J6 and ICVC terminal J7.
Check CCM status lights.
Check for 24V control power to CCM J1-1
and J1-2.
Confirm that all CCM SW1 switches are in the
“off” position.
243 POTENTIAL FREEZE-UP
EVAP PRESS/TEMP
TOO LOW
243->Evaporator Refrig Temp
[VALUE] exceeded limit of
[LIMIT]*.
Alarm declared at power up and after chiller is
shutdown, see Table 5.
Check EVAPORATOR PRESSURE transducer.
Check EVAP REFRIG TRIP POINT.
Check for proper refrigerant charge.
Check float operation.
Check for proper evaporator fluid flow
and temperature.
244 POTENTIAL FREEZE-UP
COND PRESS/TEMP
TOO LOW
244->Condenser Refrig Temp
[VALUE] exceeded limit of
[LIMIT]*.
Alarm declared when chiller in shutdown,
see Table 5.
Check CONDENSER PRESSURE transducer.
Check CONDENSER FREEZE POINT setting.