Carrier 19XRV Start-Up, Operation And Maintenance Instructions Manual page 87

Table 16 -- Alarm and Alert Messages (cent)
I. CHILLER PROTECTIVE LIMIT FAULTS(cent)
ICVC FAULT PRIMARY SECONDARY PRIMARY CAUSE ADDITIONAL CAUSE/REMEDY
STATE MESSAGE MESSAGE
233 PROTECTIVE LIMIT HIGH MOTOR 233->Comp Motor Winding
TEMPERATURE Temp [VALUE] exceeded limit
of [LIMIT]*.
234 PROTECTIVE LIMIT HIGH BEARING
TEMPERATURE
235
236
PROTECTIVE LIMIT
PROTECTIVE LIMIT
HIGH CONDENSER
PRESSURE
COMPRESS SURGE/LOW
SPEED
234_Comp Thrust Brg Temp
[VALUE] exceeded limit of
[LIMIT]*.
235_Condenser Pressure
[VALUE] exceeded limit of
[LIMIT]*.
236_Compressor Surge:
Check condenser water temp
and flow.
237 PROTECTIVE LIMIT SPARE SAFETY DEVICE 237_Spare Safety Device.
238 PROTECTIVE LIMIT EXCESSIVE COMPR
SURGE
239 TRANSDUCER
VOLTAGE FAULT
LOW DISCHARGE
SUPERHEAT
PROTECTIVE LIMIT
PROTECTIVE LIMIT 24O
241 PROTECTIVE LIMIT RECTIFIER
OVERCURRENT
242 LOSS OF WITH CCM MODULE
COMMUNICATION
243 POTENTIAL EVAP PRESS/1-EMP TOO
FREEZE-UP LOW
244 POTENTIAL
FREEZE-UP
COND PRESS/TEMP TOO
LOW
238->Compressor Surge:
Check condenser water temp
and flow.
239-->Transducer Voltage Ref
[VALUE] exceeded limit of
[LIMIT]*.
240_Check for Oil in Or
Overcharge of Refrigerant.
241 ->Rectifier Overcurrent
Fault: Check VFD Status.
242-_Loss of Communication
With CCM, Check Comm.
Connectors.
243->Evaporator Refrig Temp
[VALUE] exceeded limit of
[LIMIT]*.
244->Condenser Refrig Temp
[VALUE] exceeded limit of
[LIMIT]*.
Check motor sensors wiring and accuracy.
Check motor cooling line and spray nozzle for
proper operation, or restrictions.
Check for excessive starts within a short time
span.
Check oil heater for proper operation.
Check for low oil level, partially closed oil supply
valves, or clogged oil filter.
Check oil cooler refrigerant thermal expansion
valves.
Check for sensor wiring and accuracy.
This fault can result from extended operation at
low load with low water flow to the evaporator or
condenser.
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.
Check for high condenser water temperatures,
low water flow, fouled tubes.
Check for division plate/gasket bypass.
Check for noncondensables.
Check surge prevention parameters in
OPTIONS screen. Increase VFD Increase Step
in SETUP2.
Check VFD Minimum Speed in SETUP2 screen.
Spare safety input has tripped or factory
installed jumper is not present on Terminal
Block 1 (TB1).
Check for high condenser water temperatures,
low water flow, fouled tubes.
Check for division plate/gasket bypass.
Check for noncondensables.
Check surge prevention parameters in
OPTIONS screen.
Check cooling tower control settings and perfor-
mance to design/selection temperatures across
the entire operating range of the chiller.
Check cooler approach and water flow.
Check that CCM transducer voltage reference is
between 4.5 v and 5.5 v.
Check that pressure transducers are not
shorted to ground. This fault is normally
declared the first time an ICVC is powered up if
it was downloaded with software when it was not
connected to a CCM.
Call Carrier Service.
Check for oil loss or excessive refrigerant. If oil
level is low, refrigerant charge may be too low
resulting in ineffective oil reclaim. Excessive
refrigerant charge may cause liquid carryover
into compressor.
Check calibration of evaporator pressure and
condenser pressure sensors.
Check calibration of compressor discharge tem-
)erature sensor.
Check for high water temperatures or changes
in water flow rates.
Check wiring and control power to CCM.
Check for proper refrigerant charge.
Check float valve operation.
Check for proper fluid flow and temperature.
Confirm that condenser water enters bottom row
of condenser tubes first.
Check Evaporator Refrigerant Temperature
sensor.
Check for division plate gasket bypass.
Check for fouled tubes.
Condenser water too cold or chiller shut down
with brine below 32 F in cooler so equalization
temperature in chiller approached 32 E
Check condenser pressure transducer.
Check refrigerant charge.
*[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.
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