Carrier 19XR - Page 76

Table 8 — CVC 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
246 PROTECTIVE
LIMIT
INVALID DIFFUSER
CONFIG
246->Diffuser Control Invalid
Configuration:
Check SETUP2 Entries.
Check diffuser/inlet guide vane schedule.
247 PROTECTIVE
LIMIT
DIFFUSER POSITION
FAULT
247->Diffuser Position Fault:
Check Guide Vane and Diffuser
Actuators
Check rotating stall transducer wiring and
accuracy.
Check diffuser schedule.
Check for proper operation of diffuser actuator
and inlet guide vane actuator.
Check diffuser coupling.
Check inlet guide vane operation.
Check inlet guide vane calibration.
Check diffuser/inlet guide vane schedule.
Check diffuser mechanical set-up for proper
orientation.
If not using variable diffuser, check that the option
has not been enabled.
248 PROTECTIVE
LIMIT
SPARE TEMPERATURE
#1
248->Spare Temperature #1
[VALUE] exceeded limit of
[LIMIT]*.
249 PROTECTIVE
LIMIT
SPARE TEMPERATURE
#2
249->Spare Temperature #2
[VALUE] exceeded limit of
[LIMIT]*.
*[LIMIT] is shown on the CVC 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.
J. CHILLER ALERTS
STATE
PRIMARY
MESSAGE
SECONDARY
MESSAGE
ALARM MESSAGE
PRIMARY CAUSE
ADDITIONAL
CAUSE/REMEDY
140 SENSOR ALERT LEAVING COND
WATER TEMP
140->Sensor Fault:
Check Leaving Cond Water
Sensor
Check sensor resistance or voltage drop.
Check for proper wiring.
141 SENSOR ALERT ENTERING COND
WATER TEMP
141->Sensor Fault:
Check Entering Cond Water
Sensor
Check sensor resistance or voltage drop.
Check for proper wiring.
142 LOW OIL PRESSURE
ALERT
CHECK OIL
FILTER
142->Low Oil Pressure Alert.
Check Oil Filter.
Check for partially or closed shut-off valves.
Check oil filter.
Check oil pump and power supply.
Check oil level.
Check for foaming oil at start-up.
Check transducer wiring and accuracy.
143 AUTORESTART
PENDING
LINE PHASE
LOSS
143->Line Phase Loss Power loss has been detected in any phase.
Chiller automatically restarting.
144 AUTORESTART
PENDING
LINE VOLTAGE
DROP OUT
144->Single Cycle Line
Voltage Dropout
A drop in line voltage has been detected within
2 voltage cycles. Chiller automatically restarting if
restart is enabled.
145 AUTORESTART
PENDING
HIGH LINE
VOLTAGE
145->Line Overvoltage —
Average Line Volt [VALUE]
Check line power.
146 AUTORESTART
PENDING
LOW LINE
VOLTAGE
146->Line Undervoltage —
Average Line Volt [VALUE]
Check line power.
147 AUTORESTART
PENDING
STARTER MODULE
RESET
147->Starter Module Power-On
Reset When Running
ISM has detected a hardware fault and has reset.
Chiller automatically restarting.
148 AUTORESTART
PENDING
POWER LOSS 148->Control Power-Loss
When Running
Check control power.
149 SENSOR ALERT HIGH DISCHARGE
TEMP
149->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 high lift or low load.
Check for proper inlet guide vane and diffuser
actuator operation (XR5 Only).
Check for fouled tubes or noncondensables in the
refrigerant system.
150 SENSOR ALERT HIGH BEARING
TEMPERATURE
150->Comp Thrust Bearing
Temp [VALUE] exceeded limit
of [LIMIT]*.
Check sensor resistance or voltage drop.
Check for proper wiring.
Check for partially closed service valves.
Check oil cooler TXV.
Check oil filter.
Check oil level.
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