1336 PLUS FAULT DESCRIPTIONS Objectives BULLETIN 1336 PLUS FAULT DESCRIPTIONS GUIDE provides information to guide the user in troubleshooting the 1336 PLUS. Included is a listing and description of the various drive faults (with possible solutions, when applicable). Fault Descriptions Fault Display The LCD display is used to indicate a fault by showing a brief text statement relating to the fault (see figure below). The fault will be displayed until a drive reset is initiated. Refer to Table A for a listing and description of the various faults. Table B provides a listing of faults by number. Clearing a Fault When a fault occurs, the cause must be corrected before the fault can be cleared. After corrective action has been taken, simply cycling drive power will clear the fault. Issuing a valid Stop command will also clear a fault if the [Flt Clear Mode] parameter is set to "Disabled." In addition, a reset command can be issued anytime from a serial device (if connected). Contact Description During normal operating conditions (no faults present, drive running) the CR3 fault contacts at TB2-13 & 14 are closed, and the contacts at TB2-14 & 15 are open. When a fault occurs, the state of these contacts will change. Name & Fault # Description Action Auxiliary Fault 02 The auxiliary input interlock is open. If Control Interface option is installed, check connections at TB3. If option is not installed, check Main Control Board jumpers at J4 (J7 on 7.5-30 HP drives), pins 3 & 4 and 17 & 18. BGND 10ms Over 51 Microprocessor loop fault. Occurs if the 10ms background task has not been run in 15 ms. Replace Main Control Board. Diag C Lim Flt 36 The drive output current has exceeded the hardware current limit and the [Cur Lim Trip En] parameter was enabled. Meant to diagnose applications where hardware current is being encountered. Check programming of [Cur Lim Trip En] parameter. Check for excess load, improper DC boost setting, DC brake volts set too high or other causes of excess current. EE Init Read 53 This fault occurs on power up: - If the serial EEprom cannot be read successfully to restore the drive parameters or - If the checksums on the EEprom are not valid or - If the drive type stored in the EEprom is invalid. In order to clear the fault the default parameters should be reset and the power to the drive should be cycled. If it is the drive type, the problem cannot be cleared without changing the driver board. Note: This fault cannot be cleared. The condition must be corrected and power cycled. This signals a bad EEprom or a noise problem while writing to the EEprom. EE Init Value 54 This fault signifies that one of the drive parameters stored in the EEprom was out of range on power up or the drive type was invalid. The parameter number can be found in parameter 207, Fault Data. If it is the drive type, then the problem cannot be cleared without changing the driver board. In order to clear the fault the default parameters should be reset and power to the driver should be cycled. Note: This fault cannot be cleared. The condition must be corrected and the power cycled. This signals a bad EEprom or a noise problem while writing to the EEprom. EE prom Fault 32 This fault will display when there is a problem programming the serial EEprom on the Main Check all wire and cable connections to the Main Control Board. Replace Main Control Board. Fgnd 10ms Over 52 Microprocessor loop fault. Occurs if a 10ms interrupt is pending before the current interrupt is complete. Replace Main Control Board. Name & Fault # Description Action Ground Short Fault 13 A current path to earth ground has been detected at one or more of the drive output terminals. This is a hardware fault condition. The trip levels are solely determined by hardware components. (100 amps instantaneous) Check the motor and external wiring to the drive output terminals for a grounded condition. Ground Warning 57 Low level ground fault present. When the parameter is enabled the drive will fault with a small amount of ground current detected. Trip level is 2 amps for 30 - 50 msec. Check the motor and external wiring to the drive output terminals for a grounded condition. Hertz Err Fault 29 This fault indicates that there is not a valid operating frequency. It can be caused by any of the following: 1 .[Maximum Freq] is less than [Minimum Freq]. 2. Skip frequencies and skip bandwidth eliminate all operating frequencies. 3. 4-20mA input signal speed reference has been lost and [4-20mA Loss Sel] is set for "Stop-Fault." 1. Check [Minimum Freq] and [Maximum Freq] parameters. 2. Check [Skip Freq 1], [Skip Freq 2], [Skip Freq 3] and [Skip Freq Band] parameters. 3. Check for broken wires, loose connections or transducer loss at 4-20mA input, TB2. Hertz Sel Fault 30 A frequency select parameter has been programmed with an out of range value. Reprogram [Freq Select 1 ] and/or [Freq Select 2] with a correct value. If problem persists, replace Main Control Board or complete drive. Loop Overrn Flt 23 An overrun of the 2.5ms control loop has occurred. Check all connections to the Power Board. Replace the board or complete drive as required. Max Retries Fault 33 Drive unsuccessfully attempted to reset a fault and resume running for the programmed number of [Reset/Run Tries]. Check fault buffer for fault code requiring reset. Correct the cause of the fault and manually clear by pressing the local Stop key or cycling the TB3 Stop input. Motor Mode Flt 24 A fault has been detected originating from the Control Board. This fault will occur if the value in the motor Mode parameter gets written to an invalid value. Check parameter programming. Check all connections to the Control Board. Replace the board or complete drive as required. Motor Stall Fault 06 Current remained over 150% for more than 4 seconds. If the motor is drawing excessive current (over 150%), the motor load is excessive and will not allow the drive to accelerate to set speed. A longer accel time or a reduced load may be required. Name & Fault # Description Action Neg Slope Fault 35 Drive software detected a portion of the volts/hertz curve with a negative slope. Check drive programming. 1. [Maximum Voltage] parameter must be greater than [Base Voltage]. 2. [Base Voltage] parameter must be greater than [Start Boost]. 3. If the [DC Boost Select] parameter is set to "Custom," [Base Voltage] must be greater than [Break Voltage] and [Break Voltage] must be greater than [Start Boost]. Open Pot Fault 09 An external pot is connected and the ground lead of the pot is disconnected creating a potential drive overspeed hazard. The analog voltage level of the pot exceeds 3.9V DC. Check the external potentiometer circuit at TB2, terminals 1, 2 and 3 for an open circuit. Operator Error Fault 11 PWM frequency is set too high. Frequency calculations receive an invalid number. A SCANbus TM device requests a Read or Write of a data type not supported. Overcurrent Flt 12 Overcurrent is detected in overcurrent hardware trip circuit. Check for a short circuit at the drive output or excessive load conditions at the motor. Overload Fault 07 Internal electronic overload trip. An excessive motor load exists. It must be reduced such that drive output current does not exceed the % of current set by the [Overload Current] parameter. Overtemp Fault 08 Heat sink temperature exceeds a predefined value of 90° C (195° F). Check for blocked or dirty heat sink fins. Check that the ambient temperature has not exceeded 40° C (104° F). Overvolt Fault 05 DC bus voltage exceeded maximum value. Monitor the AC line for high line voltage or transient conditions. Bus overvoltage can also be caused by motor regeneration. Extend the decel time or install dynamic brake option. Name & Fault # Description Action Phase U Fault 38 A phase to ground fault has been detected between the drive and motor in this phase. Check the wiring between the drive and motor. Check motor for grounded phase. The fault is checked during the power stage diagnostics (Which is after the start button is pushed , but before the accel is started) During the power stage diagnostics the drive goes out and switches on/off the IGBT’s in a certain pattern and measures for excessive current. Phase V Fault 39 A phase to ground fault has been detected between the drive and motor in this phase. Check the wiring between the drive and motor. Check motor for grounded phase. The fault is checked during the power stage diagnostics (Which is after the start button is pushed , but before the accel is started) During the power stage diagnostics the drive goes out and switches on/off the IGBT’s in a certain pattern and measures for excessive current. Phase W Fault 40 A phase to ground fault has been detected between the drive and motor in this phase. Check the wiring between the drive and motor. Check motor for grounded phase. The fault is checked during the power stage diagnostics (Which is after the start button is pushed , but before the accel is started) During the power stage diagnostics the drive goes out and switches on/off the IGBT’s in a certain pattern and measures for excessive current. P Jump Err Flt 37 An attempt has been made to enable both P Jump and Slip Compensation. Verify that both P Jump and Slip Compensation are not both enabled. Pole Calc Fault 50 A fault will occur if: 1. motor rmp > 120 *motor_hertz/motor_poles or 2. motor rpm < 180 *motor _hertz/motor _poles or 3. motor poles < 2 or 4. motor poles > 32 Check parameter programming. Motor poles is calculated using Parameter 178, motor hertz, and Parameter 177, motor rpm. Power Loss Fault 03 DC bus voltage remained below 85% of nominal for longer than 0.500ms. [Line Loss Fault] parameter is enabled. Monitor the incoming AC line for low voltage or line power interruption. Power Mode Fault 26 The internal power mode variable received an incorrect value. Check parameter programming. Check all connections to the Control Board. Replace the board or complete drive as required. Name & Fault # Description Action Power Test Flt 46 The internal power mode variable received an incorrect value. Check parameter programming. Check all connections to the Power Board. Replace the board or complete drive as required. Precharge Fault 19 Occurs if precharge device is open 20ms after the end of a line loss condition or if the bus charging alarm remains on for 20 seconds. Check the precharge circuit for. possible IGBT failure or damage. Replace drive. Precharge Open 56 Precharge device malfunction. Check the precharge circuit. Replace drive. Reprogram Fault 48 An attempt was made to program a parameter while the drive was running. Reprogram parameter after drive is stopped and fault is reset. ROM or RAM Flt 68 Internal power-up ROM or RAM tests have failed. Check Language Module. Replace Control Board or complete drive as required. Run Boost Fault 34 An attempt has been made to set the [Run Boost] parameter to a value greater than the [Start Boost] parameter. Verify that parameter has been programmed correctly. Serial Fault 10 An active SCANbusTM adapter is disconnected while it possesses control of a local bus function. Heat sink thermistor is open or malfunctioning. Check for break in communications line. Undervolt Fault 04 DC Bus voltage fell below the minimum value (388V DC at 460V AC input). [Line Loss Fault] parameter is enabled. Monitor the incoming AC line for low voltage or line power interruption. UV Short Fault 41 Excessive current has been detected between these two drive output terminals. This fault is checked during the power stage diagnostics (Which is after the start button is pushed, but before the accel is started). During the power stage diagnostics the drive goes out and switches on/off the IGTB’s in a certain pattern and measures for excessive current. Check the motor and external wiring to the drive output terminals for a shorted condition. Temp Sense Open 55 Check thermistor and connections. Name & Fault # Description Action UW Short Fault 42 Excessive current has been detected between these two drive output terminals. This fault is checked during the power stage diagnostics (Which is after the start button is pushed, but before the accel is started). During the power stage diagnostics the drive goes out and switches on/off the IGTB’s in a certain pattern and measures for excessive current. Check the motor and external wiring to the drive output terminals for a shorted condition. VW Short Fault 43 Excessive current has been detected between these two drive output terminals. This fault is checked during the power stage diagnostics (Which is after the start button is pushed, but before the accel is started). During the power stage diagnostics the drive goes out and switches on/off the IGTB’s in a certain pattern and measures for excessive current. Check the motor and external wiring to the drive output terminals for a shorted condition. Xsistr Desat Flt 47 One or more of the output transistors has gone into desaturation. Fault # Display Name Fault Description 02 03 04 05 06 Auxiliary Fault Power Loss Fault Undervolt Fault Overvolt Fault Motor Stall Fault Auxiliary Input Power Loss Undervoltage Overvoltage Motor Stall 07 08 09 10 11 Overload Fault Overtemp Fault Open Pot Fault Serial Fault Op Error Fault Overload Overtemperature Open Potentiometer Serial Communications Operation Error 12 13 19 23 24 Overcurrent Flt Ground Fault Precharge Fault Loop Overrn Flt Motor Mode Flt Overcurrent Ground Fault Precharge Loop Overrun Motor Mode Fault 26 29 30 32 33 Power Mode Fault Hertz Err Fault Hertz Sel Fault EEprom Fault Max Retries Fault Power Mode Hertz Error Hertz Set EEprom Maximum Retries 34 35 36 37 38 Run Boost Fault Neg Slope Fault Diag C Lim Flt P Jump Err Flt Phase U Fault Run Boost Negative Slope Diagnostic Current Limit P Jump Error Phase U Open 39 40 41 42 43 Phase V Fault Phase W Fault UV Short Fault UW Short Fault VW Short Fault Phase V Open Phase W Open UV Short UW Short VW Short 46 47 48 50 51 Power Test Flt Xsistr Desat Flt Reprogram Fault Pole Calc Fault BGND 10ms Over Power Fault Transistor Desaturation Reprogram Fault Motor Poles Fault Microprocessor Loop Fault 52 53 54 55 56 FGND 10ms Over EE Init Read EE Init Value Temp Sense Open Precharge Open Microprocessor Loop Fault EEprom Fault EEprom Fault Thermistor Open Fault Precharge Circuit Fault 57 68 Ground Warning ROM or RAM Flt Ground Fault Warning ROM or RAM Internal Memory Fault