Carrier SmartVu Control Manual page 107

Alm-257 ALM-257 Protective
Limit - High Condenser
Pressure
Alm-258 ALM-258 Protective
Limit - Spare Safety
Device
Alm-259 ALM-259 Protective
Limit - Excessive
Compressor Surge
Alm-260 ALM-260 Protective
Limit - Compressor
Start Relay Start failure
Alm-261 ALM-261 Potential
Evaporator Freeze-up
Alm-263 ALM-263 Protective
Limit - Invalid Diffuser
Config
Alm-264 ALM-264 Protective
Limit - Diffuser Position
Fault
SRDC-UG-2-14-000
19 Series Carrier®
–
TM
SmartVu
Controls IOM
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REVISION DATE
2.3 Dec 4, 2020
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Check CONDENSER PRESSURE. Check
for high Condenser Water temperatures,
low water flow, fouled tubes. Check for
division plate/gasket bypass or plugged
condenser water strainers. Check for
noncondensables in condenser. Check
CONDENSER PRESSURE transducer
wiring and accuracy to IOB . Configure
COND PRESS OVERRIDE in
configuration screen. This Alarm is not
caused by the High Condenser Pressure
Switch.
Spare safety input has been closed
Five SURGE PROTECTION COUNTS
occurred within SURGE TIME PERIOD.
VFD Only: Surge prevention alarm
declared when ACTUAL VFD SPEED is at
least 90%. Check for high condenser
water temperatures, low water flow, fouled
tubes. Check CONDENSER APPROACH.
Check condenser water strainers. Check
for division plate/gasket bypass. Check for
noncondensables in condenser. Check
surge prevention parameters in OPTIONS
screen. Compare cooling tower control
settings and performance against
design/selection temperatures across the
entire operating range of the chiller.
Check EVAPORATOR APPROACH and
chilled water flow.
Check motor starter 1M contactor wiring
Check ISM current sensors
Check CALC EVAP SAT TEMP, EVAP
REFRIG LIQUID TEMP, and EVAP
REFRIG TRIPPOINT. Check for proper
refrigerant charge.
Check float valve operation. Confirm that
optional refrigerant liquid line isolation
valve is open.
Check for proper Chilled Water flow and
temperature. Confirm that condenser
water enters bottom row of condenser
tubes first, reversed condenser water flow
may cause refrigerant to stack in the
condenser. Check EVAPORATOR
PRESSURE transducer and EVAP
REFRIG LIQUID TEMP sensor. Check for
evaporator water box division plate gasket
bypass. Check for fouled tubes.
Check SRD configurations
Confirm that Diffuser Option in SRD
Configuration screen has not been
Enabled if compressor does not have a
split ring diffuser. May indicate rotating
stall condition.
Check rotating stall transducer wiring
accuracy and sealing.
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