Carrier AQUAFORCE 30XA080-500 Controls, Start-up, Operation, Service And Troubleshooting Instructions

Also see for AQUAFORCE 30XA080: Installation instructions Controls, start-up, operation, service and troubleshooting instructions Installation instructions Product data

Contents

Carrier AQUAFORCE 30XA080-500 Controls, Start-up, Operation, Service And Troubleshooting Instructions Manual pdf 88 page image

88Every month:• Check condenser coils for debris; clean as necessary withCarrier approved coil cleaner.• Check moisture indicating sight glass for possible refriger-ant loss and presence of moisture.Every 3 months (for all machines):• Check refrigerant charge.• Check all refrigerant joints and valves for refrigerant leaks;repair as necessary.• Check chilled water flow switch operation.• Check all condenser fans for proper operation.• Check oil filter pressure drop.• Check oil separator heater operation.• Inspect pump seal, if equipped with a hydronic pump package.Every 12 months (for all machines):• Check all electrical connections; tighten as necessary.• Inspect all contactors and relays; replace as necessary.• Check accuracy of thermistors; replace if greater than ±2° F(1.2° C) variance from calibrated thermometer.• Check accuracy of transducers; replace if greater than ±5 psi(34.47 kPa) variance.• Check to be sure that the proper concentration of antifreezeis present in the chilled water loop, if applicable.• Verify that the chilled water loop is properly treated.• Check refrigerant filter driers for excessive pressure drop;replace as necessary.• Check chilled water strainers, clean as necessary.• Check cooler heater operation.• Check condition of condenser fan blades and that they aresecurely fastened to the motor shaft.• Perform Service Test to confirm operation of all components.• Check for excessive cooler approach (Leaving ChilledWater Temperature – Saturated Suction Temperature) whichmay indicate fouling. Clean cooler vessel if necessary.• Obtain oil analysis; change as necessary.TROUBLESHOOTINGSee Table 58 for an abbreviated list of symptoms, possiblecauses and possible remedies.Alarms and Alerts — The integral control system con-stantly monitors the unit and generates warnings when abnor-mal or fault conditions occur. Alarms may cause either a circuit(Alert) or the whole machine (Alarm) to shut down. Alarmsand Alerts are assigned codes as described in Table 59. Thealarm/alert indicator LED on the Navigator™ module is illu-minated when any alarm or alert condition is present. If anAlert is active, the Alarm Indicator LED will blink. If an Alarmis active, the Alarm Indicator LED will remain on. Currentlyactive Alerts and Alarms can be found in (Current Alarm,ALRM).The controller generates two types of alarms. Automaticreset alarms will reset without any intervention if the conditionthat caused the alarm corrects itself. Manual reset alarmsrequire the service technician to check for the alarm cause andreset the alarm. The following method must be followed toreset manual alarms:Before resetting any alarm, first determine the cause of thealarm and correct it. To reset the alarm, set R.ALM to YES.The alarms will be reset. Indicator light will be turned off whenswitched correctly. Do not reset the chiller at random withoutfirst investigating and correcting the cause(s) of the failure.Each alarm is described by a three or four-digit code. Thefirst one or two digits indicate the alarm source and are listed inFig. 62. The last two digits pinpoint the problem. See Table 59.DIAGNOSTIC ALARM CODES AND POSSIBLECAUSESThermistor FailureAlarm 1 — Cooler Fluid Entering (th.01)Alarm 2 — Cooler Fluid Leaving (th.02)Criteria for Trip — This alarm criterion is tested whether theunit is on or off if the temperature as measured by the thermis-tor is outside of the range –40 to 245 F (–40 to 118.3 C).Action to be Taken — The unit shuts down normally, or is notallowed to start.Reset Method — Automatic, the alarm will reset once thethermistor reading is within the expected range.Possible Causes — If this condition is encountered, check thefollowing items:• sensor wiring to the Main Base Board• sensor accuracySee the Thermistors section on page 71 for thermistor de-scription, identifiers and connections.Defrost Thermistor FailureAlarm 3 — Circuit A (th.03)Alarm 4 — Circuit B (th.04)NOTE: These alarms are not used or supported. If this con-dition is encountered, confirm machine configuration.Alarm Descriptor thAlarm SuffixCode Number to identify source.01Alarm PrefixA1 – Compressor A1 FailureB1 – Compressor B1 FailureC1 – Compressor C1 FailureCo – Communication FailureFC – Factory Configuration ErrorMC – Master Chiller Configuration ErrorP – Process FailurePr – Pressure Transducer FailureSr – Service Notificationth – Thermistor FailureAlarmFig. 62 — Alarm Descriptiona30-4250