Carrier 38APS025 Manual

Also see for 38APD115: Installation instructions

Carrier 38APS025 Manual Manual pdf 154 page image

154Table 72 — Motormaster ® V Fault CodesLEGENDPressure Transducers — The suction and dischargetransducers are different part numbers and can be distinguishedby the color of the transducer body: suction (yellow) and dis-charge (red). See Fig. 33-43 for typical locations of pressuretransducers on each circuit. No pressure transducer calibrationis required. The transducers operate on a 5 vdc supply, which isgenerated by the main base board (MBB). See Fig. 183 fortransducer connections to the J8 connector on the MBB.TROUBLESHOOTING — If a transducer is suspected of be-ing faulty, first check supply voltage to the transducer. Supplyvoltage should be 5 vdc ± 0.2 v. If supply voltage is correct,compare pressure reading displayed on the scrolling marqueedisplay module against pressure shown on a calibrated pressuregage. Pressure readings should be within ± 5 psig (35 kPa). Ifthe two readings are not reasonably close, check the pressuretransducer harness wiring at the MBB connection and at thetransducer plug. If the wiring is good, replace the pressuretransducer.FAULT CODE DESCRIPTION SOLUTIONAF High Temperature Fault: Ambient temperature is toohigh; cooling fan has failed (if equipped).Check cooling fan operation.CF Control Fault: A blank EPM or an EPM with corrupteddata has been installed.Perform a factory reset using Parameter P48 - PRO-GRAM SELECTION.cFIncompatibility Fault: An EPM with an incompatibleparameter version has been installed.Either remove the EPM or perform a factory reset(Parameter 48) to change the parameter version of theEPM to match the parameter version of the drive.CLCURRENT LIMIT: The output current has exceeded theCURRENT LIMIT setting (Parameter P25) and the driveis reducing the output frequency to reduce the outputcurrent.If the drive remains in CURRENT LIMIT too long, it cantrip into a CURRENT OVERLOAD fault (PF).Check for loose electrical connections.Check for faulty condenser fan motor.Check that Parameter P25 (see Table 55 on page 127)is set correctly.Er Error: Invalid data has been entered or an invalid com-mand was attempted.GF Data Fault: User data and OEM defaults in the EPM arecorruptedRestore factory defaults P48, see fault code CF. If thatdoes not work, replace EPM.HF High DC Bus Voltage Fault: line voltage is too high;deceleration rate is too fast; overhauling load.Check line voltage; set P01 appropriately.JFSerial Fault: The watchdog timer has timed out, indicat-ing that the serial link has been lost.Check serial connection (computer)Check settings for P15.Check settings in communication software to matchP15.LC Fault Lockout: The drive has failed three start attemptsand requires a manual reset.Correct fault condition.LCS Loss of control signalLF Low DC Bus Voltage Fault: Line voltage is too low. Check line voltage; set P01 appropriately.OFOutput Transistor Fault: Phase to phase or phase toground short circuit on the output; failed output transis-tor; boost settings are too high; acceleration rate is toofast.Check VFD wiring to motor. Be sure motor is connectedto T1, T2, and T3.Reduce boost or increase acceleration values.If unsuccessful, replace drive.PFCurrent Overload Fault: VFD is undersized for the appli-cation; mechanical problem with the driven equipment.Check line voltage; set P01 appropriately.Check for dirty coils.Check for motor bearing failure.SF Single-phase fault: Single-phase input power has beenapplied to a three-phase driveCheck input power phasing.SP Start pending: The drive is in between restart attempts. Correct fault condition.F1 EPM fault: The EPM is missing or damagedF2 - F9, Fo Internal Faults: The control board has sensed a prob-lemConsult factory.Drive display = 60.0 eventhough it is cold outside andit should be running slowerFeedback signal is above set point Check for proper set point.Check liquid line pressure.Drive display = --- eventhough drive should berunningStart jumper is missing Replace start jumper. See section above.Drive display = 8.0 eventhough fan should berunning fasterFeedback signal is below set point and fan is at mini-mum speedCheck for proper set point.Check liquid line pressure.VFD flashes 57 and LCSFeedback or speed signal lost. Drive will operate at 57Hz until reset or loss of start command. Resettingrequires cycling start command (or power).In stand-alone mode: Check transducer wiring and feed-back voltage. Feedback voltage displayed on P-69. Pin6 should be 5 v output.Pin 5 (feedback) should be between 0 and 5 v.EPM — Electronic Programming ModuleVFD — Variable Frequency Driveo815