Specifications

37
Table 5 — Protective Safety Limits and Control Settings
MONITORED PARAMETER
ALARM
OR
ALERT
STATE
LIMIT COMMENTS
Temperature Sensors Out of
Range
260-271,
140,141
-40 deg F>Temperature>245 deg F for 3 seconds Preset Alarm. See Temperature vs. Resistance/Voltage Drop
in Table 17A and 17B
Pressure Transducers Out
of Range
262-272 0.06>Voltage Ratio>0.98 for 3 seconds Preset Alarm Voltage Ratio=Input Voltage/Voltage Reference(5 Volts)
High Compressor Discharge
Temperature
231 COMP DISCHARGE TEMP > 180 deg F(82 deg C) Preset Alarm, Configure DISCH TEMP ALERT in SETUP1 screen
162 COMP DISCHARGE TEMP > COMP DISCHARGE ALERT Configure COMP DISCH ALERT in SETUP1 screen
103 COMP DISCHARGE TEMP > COMP DISCHARGE ALERT - 10 deg F(5.6 deg C) Prestart Alert, Configure COMP DISCHARGE ALERT in SETUP1 screen
High Motor Temperature 233 COMP MOTOR WINDING TEMP > 244 deg F(118 deg C) or < -5 deg F(-21 deg C)
— Open Circuit
Preset Alarm
102 COMP MOTOR WINDING TEMP > COMP MOTOR TEMP OVERRIDE - 10 deg
F(5.6 deg C)
Prestart Alert, Configure COMP MOTOR TEMP OVERRIDE in SETUP1 screen
Low Evaporator
Temperature (Freeze
Protection)
243 Chiller in RECYCLE SHUTDOWN and CALC EVAP SAT TEMP or EVAP REFRIG
LIQUID TEMP < EVAP REFRIG TRIPPOINT + 1 deg F
Preset Alarm, Configure EVAP REFRIG TRIPPOINT in SETUP1 screen
232 For water: EVAP REFRIG LIQUID TEMP or CALC EVAP SAT TEMP TEMP <
33 deg F and EVAPORATOR APPROACH < EVAP APPROACH ALERT
Preset Alarm, Configure EVAP APPROACH ALERT in SETUP1 screen
For brine: EVAP REFRIG LIQUID TEMP or CALC EVAP SAT TEMP is between
0 deg F(-17.8C) and 40 deg F(4.4C)(brine) and EVAPORATOR APPROACH <
EVAP APPROACH ALERT
Configure EVAP APPROACH ALERT and CHILLED MEDIUM in SETUP1 screen
104 CALC EVAP SAT TEMP < 33 deg F + REFRIG OVERRIDE DELTA T (non-brine) Prestart Alert, Configure REFRIG OVERRIDE DELTA T in SETUP1 screen
CALC EVAP SAT TEMP < EVAP REFRIG TRIPPOINT (brine) + REFRIG OVER-
RIDE DELTA T
Prestart Alert, Configure EVAP REFRIG TRIP POINT and CHILLED MEDIUM in
SETUP1 screen
Transducer Voltage Fault 239 TRANSDUCER VOLTAGE REF<4.5 VDC Preset Alarm
High Condenser Pressure
- Control 235 CONDENSER PRESSURE > 166 PSI Preset Alarm
- Switch 207 High Pressure Switch Open(165 +/-5 PSIG) & VFD START = YES Preset Alarm, Switch closes at 110 +/-7 PSIG
- Prestart 106 CONDENSER PRESSURE > COND PRESS OVERRIDE - 25 PSI Prestart Alert, Configure COND PRESS OVERRIDE in SETUP1 screen
Low Condenser Pressure
(Freeze Protection)
244 Chiller in PUMPDOWN mode and CONDENSER REFRIG TEMP < CONDENSER
FREEZE POINT
Preset Alarm, Configure CONDENSER FREEZE POINT in SETUP1 screen.
154 Energizes condenser pump relay if CONDENSER REFRIG TEMP < CONDENSER
FREEZE POINT. De-energizes condenser pump relay when CONDENSER REFRIG
TEMP > CONDENSER FREEZE POINT + 5 deg F (2.8 deg C) and ENTERING
COND LIQUID > CONDENSER FREEZE POINT
Configure CONDENSER FREEZE POINT in SETUP1 screen
Oil
- Low Pressure 234 OIL PRESSURE DELTA P < 18 PSID after OIL PUMP = ON, OIL PRESS VERIFY
TIME exceeded, and STARTUP in progress
Preset Alarm, Configure OIL PRESS VERIFY TIME in SETUP1 screen
- Low Pressure 228 OIL PRESSURE DELTA P < 15 PSID and VFD START = TRUE Preset Alarm, condition must persist for 55 consecutive seconds
- Low Pressure 142 OIL PRESSURE DELTA P < 15 PSID and VFDSTART = TRUE Preset Alert, condition must persist for 10 consecutive seconds
- High Oil Pressure 164 Oil Pump ON and OIL PRESSURE DELTA P > 45 PSI Preset Alert, condition must persist for 55 consecutive seconds
- Pressure Sensor Fault 227 OIL PRESSURE DELTA P > 4 PSI immediately before oil pump turned on Preset Alarm
- Low Temperature 105 OIL SUMP TEMP < 140 deg F and OIL SUMP TEMP < CALC EVAP SAT TEMP +
15 deg F (8
.3 deg C)
Preset Prestart Alert
Line Voltage
- High 211/145 Line voltage > limits are calculated by VFD (alert is declared if AUTORESTART is
ENABLED)
Preset Alarm/Autorestart Alert
- High 108 PERCENT LINE VOLTAGE > 115% Preset Prestart Alert
- Low 212/146 Line voltage < limits calculated by VFD (alert is declared if AUTORESTART is
ENABLED)
Preset Alarm/Autorestart Alert
- Low 107 PERCENT LINE VOLTAGE < 85% Preset Prestart Alert
- Imbalance 216 LINE VOLTAGE IMBALANCE > LINE VOLTAGE % IMBALANCE Configure LINE VOLTAGE % IMBALANCE and LINE VOLT
IMBALANCE TIME in VFD_CONF screen
Line Current
- Dropout 210/144 Line Voltage on 2 Phases < 50% for 1 Cycle Preset Alarm/Autorestart Alert
- Imbalance 209/143 LINE CURRENT IMBALANCE>LINE CURRENT % IMBALANCE Configure LINE CURRENT % IMBALANCE and LINE CURRENT IMBALANCE
TIME in VFD_CONF screen
Power
- Line Frequency Trip 222 47 Hz < LINE FREQUENCY < 63 Hz Preset Alarm
- Power Loss 214/148 DC BUS VOLTAGE<85% for Excessive Time Period Preset Alarm/Autorestart Alert
- Phase Reversal 226 Line power phases out of sequence Preset Alarm
Motor
- Stall 238 > 5 stall events within STALL TIME PERIOD Preset Alarm, Configure STALL DELTA% AMPS and STALL 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
- Rotation Reversed 221 DISCHARGE PRESSURE decreases more than 2 PSI after VFDSTART = TRUE Preset Alarm, Must be outside -2 PSI limit for 5 consecutive samples
- 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% at startup 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% 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 Liquid Flow 229 CHILLED LIQUID FLOW = FALSE after CHILLED LIQUID PUMP = ON & LIQUID
FLOW VERIFY TIME elapsed. CHILLED LIQUID DELTA P < EVAP FLOW DELTA P
CUTOUT or CALC EVAP SAT TEMP < EVAP REFRIG TRIPPOINT or EVAPORA-
TOR APPROACH > EVAP APPROACH ALERT and EVAP REFRIG LIQUID TEMP
< EVAP REFRIG TRIPPOINT +1
Configurable Alarm, Configure LIQUID FLOW VERIFY TIME in SETUP1 screen.
EVAPORATOR APPROACH = LEAVING CHILLED LIQUID TEMP - EVAP REFRIG
LIQUID TEMP
Low Cond Liquid Flow 230 COND LIQUID FLOW = FALSE after COND LIQUID PUMP = ON & LIQUID FLOW
VERIFY TIME elapsed. CONDENSER LIQUID DELTA P < COND FLOW DELTA P
CUTOUT or CONDENSER APPROACH > CONDENSER APPROACH ALERT, or
CONDENSER PRESSURE > COND PRESS OVERRIDE + 5
Configurable Alarm, Configure LIQUID FLOW VERIFY TIME in SETUP1 screen.
CONDENSER APPROACH = CONDENSER REFRIG TEMP -
LEAVING COND LIQUID TEMP
High Approach-Evaporator 160 EVAPORATOR APPROACH > EVAP APPROACH ALERT and VFD START = TRUE Configure EVAP APPROACH ALERT in SETUP1 screen
EVAPORATOR APPROACH = LEAVING CHILLED LIQUID TEMP - EVAP REFRIG
LIQUID TEMP
- Condenser 161 CONDENSER APPROACH > COND APPROACH ALERT and VFD START =
TRUE
Co nf ig ur e C ON D A PPROAC H A LE RT in SE TU P1 sc reen .
VFD
- Speed Out of Range 245 ACTUAL VFD SPEED < VFD SPEED OUTPUT - 10% or ACTUAL VFD SPEED >
VFD SPEED OUTPUT + 10%
Preset Alarm, Must be outside +/-10% range 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
- Communication Failure 224 Communication with VFD lost for more than 10 sec Preset Alarm
Rectifier
- Overcurrent 241 RECTIFIER OVERCURRENT exceeded limit determined by VFD Preset Alarm
- High Temperature 218 RECTIFIER TEMPERATURE >exceeds limit calculated by VFD Preset Alarm
101 RECTIFIER TEMPERATURE > RECTIFIER TEMP OVERRIDE - 20 deg F(11.1
deg C)
Prestart Alert, Configure RECTIFIER TEMP OVERRIDE in SETUP1 screen
Inverter
- Overcurrent 246 INVERTER OVERCURRENT exceeded limit determined by VFD Preset Alarm
- High Temperature 219 INVERTER TEMPERATURE >exceeds limit calculated by VFD Preset Alarm
109 INVERTER TEMPERATURE > INVERTER TEMP OVERRIDE - 20 deg F
(11.1 deg C)
Prestart Alert, Configure INVERTER TEMP OVERRIDE in SETUP1 screen
High VFD Inductor
Temperature
255 Inductor Temperature Switch Open Preset Alarm
DC Bus Voltage
- High 205/150 DC BUS VOLTAGE Limit Exceeded, limit is calculated by VFD Preset Alarm/Autorestart Alert
- Low 215/149 DC BUS VOLTAGE < approximately 407VDC @400/480V Line Side Voltage Preset Alarm/Autorestart Alert
Ground Fault 220 GROUND FAULT CURRENT > 7% of Drive Rated Amps Sensed Preset Alarm
Optional Limits
- Spare Temperature 248,249 SPARE TEMPERATURE > SPARE TEMP LIMIT for 3 consecutive samples Optional Alarm, Configure SPARE TEMP ENABLE and SPARE TEMP LIMIT in
SETUP1 screen
- Spare Temperature 158,159 SPARE TEMPERATURE > SPARE TEMP LIMIT for 3 consecutive samples Optional Alert, Configure SPARE TEMP ENABLE and SPARE TEMP LIMIT in
SETUP1 screen
- Refrigerant Leak Sensor 250 REFRIGERANT LEAK SENSOR PPM > REFRIG LEAK ALARM PPM Optional Alarm, configure PPM AT 20 MA and REFRIGERANT LEAK ALARM PPM
in OPTIONS screen.