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Table 11 — CVC/ICVC Primary and Secondary Messages and
Custom Alarm/Alert Messages with Troubleshooting Guides (cont)
I. CHILLER PROTECT LIMIT FAULTS (cont)
STATE
PRIMARY
MESSAGE
SECONDARY
MESSAGE
ALARM MESSAGE
PRIMARY CAUSE
ADDITIONAL
CAUSE/REMEDY
227 PROTECTIVE
LIMIT
OIL PRESS
SENSOR FAULT
227->Oil Pump Delta P
[VALUE] exceeded limit of
[LIMIT]*.
Check transducer wiring and accuracy.
Check power supply to pump.
Check pump operation.
Check transducer calibration.
228 PROTECTIVE
LIMIT
LOW OIL
PRESSURE
228->Oil Pump Delta P
[VALUE] exceeded limit of
[LIMIT].*
Check transducer wiring and accuracy.
Check power supply to pump.
Check pump operation.
Check oil level.
Check for partially closed service valves.
Check oil filters.
Check for foaming oil at start-up.
Check transducer calibration.
229 PROTECTIVE
LIMIT
LOW CHILLED
WATER FLOW
229->Low Chilled Water
Flow; Check Delta P Config
& Calibration
Perform pump control test.
Check transducer accuracy and wiring.
Check water valves.
Check transducer calibration.
230 PROTECTIVE
LIMIT
LOW CONDENSER
WATER FLOW
230->Low Condenser Water
Flow; Check Delta P Config
& Calibration
Perform pump control test.
Check transducer accuracy and wiring.
Check water valves.
Check transducer calibration.
231 PROTECTIVE
LIMIT
HIGH DISCHARGE
TEMP
231->Comp Discharge
Temp [VALUE] exceeded
limit of [LIMIT].*
Check sensor resistance or voltage drop.
Check for proper wiring.
Check for proper condenser flow and temperature.
Check for proper inlet guide vane and diffuser
actuator operation.
Check for fouled tubes or noncondensables in the
system.
232 PROTECTIVE
LIMIT
LOW REFRIGERANT
TEMP
232->Evaporator Refrig
Temp [VALUE] exceeded
limit of [LIMIT]*.
Check for proper refrigerant charge.
Check float operation.
Check for proper fluid flow and temperature.
Check for proper inlet guide vane operation.
233 PROTECTIVE
LIMIT
HIGH MOTOR
TEMPERATURE
233->Comp Motor Winding
Temp [VALUE] exceeded
limit of [LIMIT]*.
Check motor sensors wiring and accuracy.
Check motor cooling line for proper operation, or
restrictions.
Check for excessive starts within a short time span.
234 PROTECTIVE
LIMIT
HIGH BEARING
TEMPERATURE
234->Comp Thrust Bearing
Temp [VALUE] exceeded
limit of [LIMIT]*.
Check oil heater for proper operation.
Check for low oil level, partially closed oil supply
valves, clogged oil filters, etc.
Check the sensor wiring and accuracy.
235 PROTECTIVE
LIMIT
HIGH CONDENSER
PRESSURE
235->Condenser Pressure
[VALUE] exceeded limit of
[LIMIT]*.
Check for high condenser water temperatures, low
water flow, fouled tubes.
Check for division plate/gasket bypass.
Check for noncondensables.
Check transducer wiring and accuracy.
236 PROTECTIVE
LIMIT
CCN OVERRIDE
STOP
236->CCN Override Stop
while in LOCAL run mode
CCN has signaled the chiller to stop. Reset and
restart when ready. If the signal was sent by the
CVC/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.
238 PROTECTIVE
LIMIT
EXCESSIVE
COMPR SURGE
238->Compressor Surge:
Check condenser water
temp and flow
Check condenser flow and temperatures.
Check surge protection configuration.
239 PROTECTIVE
LIMIT
TRANSDUCER
VOLTAGE FAULT
239->Transducer Voltage
Ref [VALUE] exceeded limit
of [LIMIT]*.
240 PROTECTIVE
LIMIT
LOW DISCHARGE
SUPERHEAT
240->Check for Oil in
Refrigerant or Overcharge
of Refrigerant
241 LOSS OF
COMMUNICATION
WITH STARTER
MODULE
241->Loss of Communica-
tion With Starter.
Check wiring to ISM.
242 LOSS OF
COMMUNICATION
WITH CCM
MODULE
242->Loss of Communica-
tion With CCM.
Check wiring to CCM.
243 POTENTIAL
FREEZE-UP
EVAP PRESS/TEMP
TOO LOW
243->Evaporator Refrig
Temp [VALUE] exceeded
limit of [LIMIT]*.
Check for proper refrigerant charge.
Check float operation.
Check for proper fluid flow and temperature.
Check for proper inlet guide vane operation.
244 POTENTIAL
FREEZE-UP
COND PRESS/TEMP
TOO LOW
244->Condenser Refrig
Temp [VALUE] exceeded
limit of [LIMIT]*.
245 PROTECTIVE
LIMIT
VFD SPEED
OUT OF RANGE
245->Actual VFD Speed
[VALUE] exceeded limit of
[LIMIT]*.