Carrier AquaForce B Series Controls, Start-up, Operation, Service And Troubleshooting Instructions

Also see for AquaForce 30XV140: Controls, start-up, operation, service and troubleshooting instructions

Contents

Carrier AquaForce B Series Controls, Start-up, Operation, Service And Troubleshooting Instructions Manual pdf 208 page image

208MAINTENANCERecommended Maintenance ScheduleThe following are only recommended guidelines. Jobsite con-ditions may dictate that maintenance tasks be performed moreoften than recommended.Routine for machines with e-coat condenser coils:• Check condenser coils for debris; clean as necessary withCarrier approved coil cleaner.• Periodic clean water rinse, especially in coastal and indus-trial applications.Every 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.• Record water pressure differential.• Record system superheat.Every 3 months:• Check all refrigerant joints and valves for refrigerantleaks; 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.• Check air filters located on the front panel of the compres-sor VFD drives by opening the plastic grilles; replaceclogged filters. Filters may be cleaned with mild detergentsoap and water.• Check the back of all compressor and fan drives for any de-bris. If present, clean it by blowing air from top to bottom.• Check Compressor VFD drain tubes if present (30XV350-500).Every 12 months:• Check refrigerant charge.• Check all electrical connections; tighten as necessary.• Inspect all contactors and relays; replace as necessary.• Change oil filters year 1, then as needed.• 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 ±5psig (34.47 kPa) variance.• Check to be sure that the proper concentration of anti-freeze is 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 evaporator heater operation.• Check oil 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 evaporator approach (Leaving ChilledWater Temperature – Saturated Suction Temperature) whichmay indicate fouling. Clean evaporator vessel if necessary.• Obtain oil analysis; change as necessary.Every 3-5 years:• Inspect and clean evaporator tubes.• Inspect relief valves.TROUBLESHOOTINGAlarms and AlertsThe integral control system constantly monitors the unit andgenerates warnings when abnormal or fault conditions occur.Alarms may cause either a circuit (Alert) or the whole machine(Alarm) to shut down. Alarms and Alerts are assigned codes asdescribed in Table 167.To view information about current and past alarms or to resetalarms, touch the Alarm bell button in the top right cornerof the Carrier Controller display. A solid gray icon is presentduring normal operation. The bell icon is red if there is analarm or alert. A blinking red bell icon indicates that there is analarm, but the unit is still running. A solid red highlighted bellicon indicates that the unit is shut down due to a detected fault.CURRENT ALARMSTo access the current alarms view, touch the Alarm bell buttonin the top right corner of the Carrier Controller display, andthen select Current Alarms. This screen displays up to 10current alarms with the time and date as well as a one line de-scription of each alarm. See Table 167 for a list of possiblealarms sorted alphabetically by description.RESETTING ALARMSThe alarms can be reset without stopping the machine. Thecontroller generates two types of alarms. Automatic resetalarms will reset without any intervention if the condition thatcaused the alarm corrects itself. Manual reset alarms requirethe service technician to check for the alarm cause and reset thealarm.To reset any active alarms, touch the Alarm button and thentouch the Reset Alarms icon . For Alarm Reset select theYES Radio Button and select SET in the pop-up window.When resetting the alarm manually, the reset can be performedthrough the Carrier Controller display or remotely through theweb interface (Reset Alarms menu).Only logged-in users can access the Reset Alarms menu. Themenu displays up to five alarm codes which are currently activeon the unit, corresponding to the first five items displayed in theCurrent Alarms menu. Each alarm is also described by a numer-ic code. See Tables 167 and 168 for lists of alarms by code. SeeTable 169 for Master/Slave alarm codes.In the event of a power supply interrupt, the unit restarts auto-matically without the need for an external command. However,any faults active when the supply is interrupted are saved andmay in certain cases prevent a circuit or a unit from restarting.Before resetting any alarm, first determine the cause of thealarm and correct it. Do not reset the chiller at random withoutfirst investigating and correcting the cause(s) of the failure.ALARM HISTORYOnce the cause of the alarm has been identified and corrected, itwill be displayed in the alarm history. Information regarding re-solved alarms is stored in the Alarm history menu, which is di-vided into 50 recent alarms and 50 recent major alarms. Generalalarms indicate pumps failure, transducers faults, network con-nection problems, etc. Major alarms indicate process failure.To access the Alarm history menu, touch the Alarm button andselect Alarm Historic or Major Alarm Historic. The 50 mostrecent alarms of each type are stored in memory, and are re-placed on a first-in first-out basis.