104
Table 16 — ICVC Primary and Secondary Messages and
Custom Alarm/Alert Messages with Troubleshooting Guides (cont)
H. OUT-OF-RANGE SENSOR ALARMS
STATE PRIMARY MESSAGE SECONDARY MESSAGE PRIMARY CAUSE
ADDITIONAL
CAUSE/REMEDY
260 SENSOR FAULT
LEAVING CHILLED WATER 260->Sensor Fault: Check Leaving
Chilled Water Sensor
Check sensor resistance or voltage drop
against Table 17A or 17B.
Check for proper wiring between LEAVING
CHILLED WATER Temperature Sensor and
CCM J4-3 and J4-4. Check for disconnected,
grounded, or shorted wiring.
261 SENSOR FAULT
ENTERING CHILLED WATER 261->Sensor Fault: Check Enter-
ing Chilled Water Sensor
Check sensor resistance or voltage drop
against Table 17A or 17B.
Check for proper wiring between ENTERING
CHILLED WATER Temperature Sensor and
CCM J4-1 and J4-2. Check for disconnected,
grounded, or shorted wiring.
262 SENSOR FAULT
CONDENSER PRESSURE 262->Sensor Fault: Check Con-
denser Pressure Sensor
Check CONDENSER PRESSURE transducer
wiring. Confirm that 5 V reference signal is
available between CCM J2-4 and J2-6. Check
for disconnected, grounded, or shorted wiring.
Check for condensation in transducer
connector.
263 SENSOR FAULT
EVAPORATOR PRESSURE 263->Sensor Fault: Check Evapo-
rator Pressure Sensor
Check EVAPORATOR PRESSURE transducer
wiring. Confirm that 5 V reference signal is
available between CCM J2-1 and J2-3. Check
for disconnected, grounded, or shorted wiring.
Check for condensation in transducer
connector.
264 SENSOR FAULT
COMPRESSOR BEARING TEMP 264->Sensor Fault: Check Comp
Thrust Brg Temp Sensor
Check sensor resistance or voltage drop
against Table 17A or 17B.
Check for proper wiring between COMP
THRUST BRG TEMP Sensor and CCM J4-19
and J4-20. Check for disconnected, grounded,
or shorted wiring.
265 SENSOR FAULT
COMPRESSOR MOTOR TEMP 265->Sensor Fault: Check Comp
Motor Winding Temp Sensor
Check sensor resistance or voltage drop
against Table 17A or 17B.
Check for proper wiring between COMP
MOTOR WINDING TEMP Sensor and CCM J4-
23 and J4-24. Check for disconnected,
grounded, or shorted wiring.
266 SENSOR FAULT
COMP DISCHARGE TEMP 266->Sensor Fault: Check Comp
Discharge Temp Sensor
Check sensor resistance or voltage drop
against Table 17A or 17B.
Check for proper wiring between COMP DIS-
CHARGE TEMP Sensor and CCM J4-17 and
J4-18. Check for disconnected, grounded, or
shorted wiring.
267 SENSOR FAULT
OIL SUMP TEMP 267->Sensor Fault: Check Oil
Sump Temp Sensor
Check sensor resistance or voltage drop
against Table 17A or 17B.
Check for proper wiring between OIL SUMP
TEMP and CCM J4-21 and J4-22. Check for
disconnected, grounded, or shorted wiring.
268 SENSOR FAULT
COMP OIL PRESS DIFF 268->Sensor Fault: Check Oil
Pump Delta P Sensor
Check Oil Sump Pressure and Oil Pump Dis-
charge Pressure sensor wiring and accuracy.
Confirm that 5 V reference signal is available
between CCM J3-1 and J3-3 and J3-4 and J3-
6. Check for disconnected, grounded, or
shorted OIL PUMP DELTA P wiring.
269 SENSOR FAULT
CHILLED WATER FLOW 269->Sensor Fault: Check Chilled
Water Delta P Sensor
Check CHILLED WATER DELTA P transducer
wiring and accuracy. Check FLOW DELTA P
DISPLAY setting in SETUP1 screen. Confirm
that 5 V reference signal is available between
CCM J3-13 and J3-15 and J3-16 and J3-18.
Check for disconnected, grounded, or shorted
wiring. If pressure transducers are not installed,
check for presence of resistors and jumpers
CCM terminals J3-13 through J3-18. See
Chiller Controls Schematic if flow switches are
used.
270 SENSOR FAULT
COND WATER FLOW 270->Sensor Fault: Check Cond
Water Delta P Sensor
Check CONDENSER WATER DELTA P trans-
ducer wiring and accuracy. Check FLOW
DELTA P DISPLAY setting in SETUP1 screen.
Confirm that 5 V reference signal is available
between CCM J3-19 and J3-21 and J3-22 and
J3-24. Check for disconnected, grounded, or
shorted wiring. If pressure transducers are not
installed, check for presence of resistors and
jumpers CCM terminals J3-19 through J3-24.
See Chiller Controls Schematic if flow switches
are used.
271 SENSOR FAULT
VFD SPEED OUT OF RANGE 271->Sensor Fault: Check Actual
VFD Speed
Check 0 - 5 V DC input from VFD to ISM termi-
nals J6-1 and J6-2.
Check VFD speed feedback signal calibration.
Check VFD configuration, jumpers, and dip
switch settings. Check for disconnected,
grounded, or shorted wiring.
272 SENSOR FAULT
EVAP REFRIG LIQUID TEMP 272->Sensor Fault: Check Evap
Refrig Liquid Temp Sensor
Check sensor resistance or voltage drop
against Table 17A or 17B.
Check for proper wiring between EVAP
REFRIG LIQUID TEMP Sensor and CCM J4-11
and J4-12. Check for disconnected, grounded,
or shorted wiring.
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