Carrier 19XL - page 73

Table 9 — LID Primary and Secondary Messages and CustomAlarm/Alert Messages
with Troubleshooting Guides (cont)
K. CHILLER PROTECT LIMIT FAULTS
Excessivenumbers of the same fault can lead to severe
chiller damage. Seek service expertise.
PRIMARYMESSAGE SECONDARYMESSAGE ALARM MESSAGE/PRIMARY CAUSE ADDITIONALCAUSE/REMEDY
PROTECTIVELIMIT HIGHDISCHARGE
TEMP CMPD[VALUE] exceeded limit of [LIMIT]*.Check discharge temperature.
Checkdischarge temperature immediately. Check sen-
sorfor accuracy; check for proper condenser flow and
temperature;check oil reservoir temperature. Check
condenserfor fouled tubes or air in chiller. Check for
properguide vane actuator operation.
PROTECTIVELIMIT LOWREFRIGERANT
TEMP ERT[VALUE] exceeded limit of [LIMIT]*.
Checkevap pump and flow switch.
Checkfor proper amount of refrigerant charge; check
forproper water flow and temperatures. Check for
properguide vane actuator operation.
PROTECTIVELIMIT HIGHMOTOR
TEMPERATURE
MTRW[VALUE] exceeded limit of
[LIMIT]*.Check motor cooling and
solenoid.
Checkmotor temperature immediately. Check sensor
foraccuracy. Check for proper condenser flow and
temperature.Check motor cooling system for restric-
tions.Check motor cooling solenoid for proper opera-
tion.Check refrigerant filter.
PROTECTIVELIMIT HIGHBEARING
TEMPERATURE MTRB[VALUE] exceeded limit of [LIMIT]*.Check oil cooling control.
Checkfor throttled oil supply isolation valves. Valves
shouldbe wide open. Check oil cooler thermal expan-
sionvalve. Check sensor accuracy. Check journal and
thrustbearings. Check refrigerant filter. Check for ex-
cessiveoil sump level.
PROTECTIVELIMIT LOWOIL PRESSURE
OILPD[VALUE] exceeded limit of
[LIMIT]*.Check oil pump and
transducer.
Checkpower to oil pump and oil level. Check for dirty
filtersor oil foaming at start-up. Check for thermal
overloadcutout. Reduce ramp load rate if foaming
noted.
NOTE:This alarm is not related to pressure switch
problems.
LowOil Pressure [OPEN]*. Check oil
pressureswitch/pump and 2C aux.
Checkthe oil pressure switch for proper operation.
Checkoil pump for proper pressure. Check for exces-
siverefrigerant in oil system.
PROTECTIVELIMIT NOMOTOR CURRENT CA PLoss of Motor Current: Check
sensor.
Checkwiring: Check torque setting on solid-state
starter.Check for main circuit breaker trip. Check
powersupply to PSIO module.
PROTECTIVELIMIT POWERLOSS V P Power Loss: Check voltage
supply. Check24-vdc input sensor on the SMM; adjust potenti-
ometerif necessary. Check transformers to SMM.
Checkpower to PSIO module. Check distribution bus.
Consultpower company.
PROTECTIVELIMIT LOWLINE VOLTAGE V P [VALUE] exceeded limit of
[LIMIT]*.Check voltage supply.
PROTECTIVELIMIT HIGHLINE VOLTAGE V P[VALUE] exceeded limit of
[LIMIT]*.Check voltage supply.
PROTECTIVELIMIT LOWCHILLED
WATERFLOW EVFLFlow Fault: Check evap pump/flow switch. Performpumps Control Test and verify proper switch
operation.Check all water valves and pump operation.
PROTECTIVELIMIT LOWCONDENSER
WATERFLOW CDFLFlow Fault: Check cond pump/ flowswitch.
PROTECTIVELIMIT HIGHCONDENSER
PRESSURE
HighCond Pressure [OPEN]*. Check
switch,oil pressure contact, and water
temp/flow.
Checkthe high-pressure switch. Check for proper con-
denserpressures and condenser waterflow. Check for
fouledtubes. Check the 2C aux. contact and the oil
pressureswitch in the power panel. This alarm is not
causedby the transducer.
HighCond Pressure [VALUE]: Check
switch,water flow, and transducer.
Checkwater flow in condenser. Check for fouled
tubes.Transducer should be checked for accuracy.
Thisalarm is not caused by the high pressure switch.
PROTECTIVELIMIT 1CRAUX CONTACT
FAULT 1CR AUX Starter Contact Fault: Check
1CR/1Maux contacts. 1CRauxiliary contact opened while chiller was run- ning.Check starter for proper operation.
PROTECTIVELIMIT RUNAUX CONTACT
FAULT RUN AUX Starter Contact Fault Check
1CR/1Maux contacts. Runauxiliary contact opened while chiller was running. Checkstarter for proper operation.
PROTECTIVELIMIT CCNOVERRIDE STOP CHIL S S CCN Override Stop while
inLOCAL run mode.
CCNhas signaled chiller to stop. Reset and restart
whenready. If the signal was sent by the LID, release
theStop signal on STATUS01 table.
PROTECTIVELIMIT SPARESAFETY
DEVICE SRP PL Spare Safety Fault: Check
contacts. Sparesafety input has tripped or factory-installed jumpernot present.
PROTECTIVELIMIT EXCESSIVEMOTOR
AMPS
CA P [VALUE] exceeded limit of
[LIMIT]*.High Amps; Check guide vane
drive.
Checkmotor current for proper calibration. Check
guidevane drive and actuator for proper operation.
PROTECTIVELIMIT EXCESSIVECOMPR
SURGE CompressorSurge: Check condenser watertemp and flow. Checkcondenser flow and temperatures. Check con- figurationof surge protection.
PROTECTIVELIMIT STARTERFAULT STR FLT Starter Fault: Check starter
forfault source. Checkstarter for possible ground fault, reverse rota- tion,voltage trip, etc.
PROTECTIVELIMIT STARTEROVERLOAD
TRIP STR FLT Starter Overload Trip: Check
ampscalibration/reset overload.
Resetoverloads and reset alarm. Check motor current
calibrationor overload calibration (do not field-calibrate
overloads).
PROTECTIVELIMIT TRANSDUCER
VOLTAGEFAULT
V REF [VALUE] exceeded limit of
[LIMIT]*.Check transducer power
supply.
Checktransformer power (5 vdc) supply to trans-
ducers.Power must be 4.5 to 5.5 vdc.
*[LIMIT] is shown on the LID 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 temperature, pressure, voltage, etc., at which the control tripped. [OPEN] indicates that an input circuit is open.
NOTE:See Legend on page 68.
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