Carrier 19XRV - Page 41

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Table 6 — Protective Limits and Control Settings (cont)
MONITORED PARAMETER ALARM/ALERT LIMIT COMMENTS
Motor — Surge 238 > 5 surge events within SURGE TIME PERIOD
and VFD SPEED > 90%
Preset Alarm, Configure SURGE DELTA% AMPS
and SURGE TIME PERIOD in OPTIONS screen
Surge 236 > 5 surge events within SURGE TIME PERIOD
and VFD SPEED < 90%
Preset Alarm, Configure SURGE DELTA% AMPS
and SURGE TIME PERIOD in OPTIONS screen
Current Imbalance 225 MOTOR CURRENT IMBALANCE > MOTOR
CURRENT % IMBALANCE
Configure MOTOR CURRENT % IMBALANCE and
MOTOR CURRENT IMBAL TIME in VFD_CONF
screen
Overload Trip 217 Any LOAD CURRENT PHASE > 108% for
Excessive Time Period
Preset Alarm, Configure MOTOR LOAD ACTIVE
DEMAND LIMIT in MAINSTAT screen
Excessive Amps 208 PERCENT LOAD CURRENT > 110% for 30 sec. Preset Alarm
Acceleration Fault 203 PERCENT LOAD CURRENT > 95% and
VFDSTART = TRUE for 5 to 40 sec
Preset Alarm, PERCENT LOAD CURRENT =
AVERAGE LOAD CURRENT/MOTOR RATED
LOAD AMPS
Amps Not Sensed 202 PERCENT LOAD CURRENT < 5% for 3 seconds
and VFD START=TRUE for 20 sec
Preset Alarm, PERCENT LOAD CURRENT =
AVERAGE LOAD CURRENT/MOTOR RATED
LOAD AMPS
Starts Limit Exceeded 100 More than 8 starts in 12 hours Preset Prestart Alert
Low Chilled Water Flow 229 CHILLED LIQUID FLOW = FALSE after CHILLED
WATER PUMP = ON & WATER FLOW VERIFY
TIME elapsed
Optional Alarm, Configure WATER FLOW VERIFY
TIME in SETUP1 screen
Low Cond Water Flow 230 COND WATER FLOW = FALSE after COND
WATER PUMP = ON & WATER FLOW VERIFY
TIME elapsed
Optional Alarm, Configure WATER FLOW VERIFY
TIME in SETUP1 screen
High Approach — Evaporator 162 EVAPORATOR APPROACH > EVAP APPROACH
ALERT and startup complete
Configure EVAP APPROACH ALERT in SETUP1
screen
Condenser 163 CONDENSER APPROACH > COND APPROACH
ALERT and startup complete
Configure COND APPROACH ALERT in SETUP1
screen
VFD — High VFD Speed 245 ACTUAL VFD SPEED > VFD SPEED OUTPUT
+ 10%
Preset Alarm, Must be outside +10% threshold for
75 sec.
Failure to Stop 204 PERCENT LOAD CURRENT >15% and
VFDSTART = NO for 20 sec
Preset Alarm, PERCENT LOAD CURRENT =
AVERAGE LOAD CURRENT/MOTOR RATED
LOAD AMPS
Rectifier — High Temperature 218 RECTIFIER TEMPERATURE limit exceeded Preset Alarm, Configure RECTIFIER TEMP
OVERRIDE in SETUP1 screen
110 RECTIFIER TEMPERATURE > RECTIFIER TEMP
OVERRIDE –20 F (11.1 C)
Prestart Alert, Configure RECTIFIER TEMP
OVERRIDE in SETUP1 screen
Overcurrent 241 Rectifier current limit exceeded Preset Alarm
Power Fault 200 IGBT current limit exceeded or a fault was detected
in the rectifier
Preset Alarm
Inverter — High Temperature 219 INVERTER TEMPERATURE limit exceeded Preset Alarm, Configure INVERTER TEMP
OVERRIDE in SETUP1 screen
111 INVERTER TEMPERATURE > INVERTER TEMP
OVERRIDE –20 F (11.1 C)
Prestart Alert, Configure INVERTER TEMP
OVERRIDE in SETUP1 screen
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6 Inverter current limit exceeded Preset Alarm
Power Fault 201 IGBT current limit exceeded Preset Alarm
Inductor — Overtemperature Switch 256 Inductor temperature limit exceeded Preset Alarm, Temperature switch in reactor has
opened
DC Bus Voltage — High 205/166 DC BUS VOLTAGE Limit Exceeded Preset Alarm/Alert
Low 215 DC BUS VOLTAGE < 407 VDC at 400/480 V
Line Side Voltage
Preset Alarm
Ground Fault 220 GROUND FAULT CURRENT > 7% of Drive Rated
Amps Sensed
Preset Alarm
Optional Limits — Spare Temperature 158,159,
248,249
SPARE TEMPERATURE > SPARE TEMP LIMIT Optional Alarm/Alert, Configure SPARE TEMP
ENABLE and SPARE TEMP LIMIT in SETUP1
screen
Guide Vane Position 253 ACTUAL GUIDE VANE POS > 4% after 4 minutes
of closing
Preset Alarm
ACTUAL GUIDE VANE POSITION < .045 volts
after startup complete
Preset Alarm
ACTUAL GUIDE VANE POSITION > 3.15 volts
after startup complete
Preset Alarm
ACTUAL GUIDE VANE POSITION < –1% after
startup complete
Preset Alarm
ACTUAL GUIDE VANE POSITION > 103% after
startup complete
Preset Alarm
Low Discharge Superheat 240 DISCHARGE SUPERHEAT < SUPERHEAT
REQUIRED –3° F (1.7° C) for 60 seconds
Preset Alarm, DISCHARGE SUPERHEAT = COMP
DISCHARGE TEMP – CONDENSER REFRIG
TEMP
Humidity — Dew Prevention 255 VFD COOLANT FLOW = 0% and VFD COLD
PLATE TEMPERATURE < Tdewpoint + 0.5 F
(0.3 C) or VFD COOLANT FLOW = 0% and there is
a Rectifier Overtemperature or Inverter Overtem-
perature Alarm
Preset Alarm
Sensor Fault 168 HUMIDITY SENSOR INPUT > 4.5 V or
HUMIDITY SENSOR INPUT < 0.5 V
Preset Alert