Posted 04 Dec 2010 07:05
A, OC alarm (add, subtract, constant speed over current) for a short time high current OC alarm, Shanghai Chi Chen drive repair center that is driven under normal circumstances the current detection circuit board is a problem, the module may have by the impact (damage), resulting in possible failure to continue after reset, the basic causes are the following situations: long motor cables, cable selection, the output of the critical leakage current caused by excessive or output cable connector and cable damage caused by loose generated when the load current increases the arc effect. Fuji drive repair many years experience, small-capacity (7.5G11 below) inverter 24V fan power can also cause short circuit OC3 alarm, 24V fan on the motherboard at this time will damage the power supply, motherboard other functions normally. If there is 1, OC2 and can not reset the alarm or a power to show OC3 warning, there may be a problem with the motherboard; if a press the RUN button to display OC3 alarm, the driver board is damaged. Second, OLU alarm (inverter overload) occurs when the alarm G/P9 series inverter can be resolved in three ways: First, change it to enhance torque, acceleration and deceleration time and energy to run the parameter set; followed by measuring the frequency The output is really too large; then detected with an oscilloscope the upper left corner point of the output board to determine whether the board has been damaged. Third, OU1 alarm (Over-voltage) when the general purpose inverter alarm occurs when the OU should first consider the cable is too long, the insulation is aging, the middle part of the DC electrolytic capacitor is damaged, while for large inertia motor loads can be considered to do something on-line self-tuning. Also in the startup with a multimeter measure the intermediate DC link voltage, if the measuring instrument panel LCD display shows voltage and the voltage is different, the detection circuit board failure, the need to replace the motherboard. When the DC bus voltage is higher than 780VDC, the drive to do OU alarm; when less than 350VDC, the drive to do voltage LU alarm. Maintenance of the past, Siemens converter also encountered such problems. Fourth, LU alarm (under voltage) If the device is often under-voltage alarm LU, you can consider the parameters of the drive initialization (H03 set to 1, confirm), then increase the drive's carrier frequency (parameter F26). If under-voltage alarm LU E9 equipment and can not be reset, it is the (power) driver board out of the question. V., EF alarm (on the ground short circuit fault) G/P9 series inverter alarm occurs when the Hall element may be the motherboard or a fault. VI, Er1 alarm (memory error) on the G/P9 series inverter ER1 not reset the fault of the treatment: remove FWDCD short-circuit chip, power, press and hold the RESET button has been under the power, to know and then let go off LED power indicator; and then re-power on, see the lifting of ER1 does not reset the fault, if this method can not be lifted by, then the internal code has been lost, then the need for a motherboard. VII, Er7 alarm (self-tuning negative) G/P11 series inverter failure alarm occurs when the damage is usually charging resistor (small capacity inverter). Another is to check whether the internal contactor pull (30G11 or more large capacity drive, and when the drive only when the alarm output load), contactor auxiliary contact is good contact; if it does not pull the internal contacts can first check 1A fuse driver board is damaged. Problem may be driver board, you can check the signal sent to the Main Board of the two cores are normal. VIII, Er2 alarm (panel communication error) 11KW more power inverter circuit when the 24V fan alarm occurs when (motherboard problem). For the E9 series machines, generally display panel DTG component damage, damage to the device when the joint damage caused by the motherboard, the performance of the display panel for the replacement immediately after the power-running OC police. For G/P9 machine to display ER2 a police power, it is a driver board capacitor failure. September, OH1 overheat alarm (heat sink overheat) OH1 and OH3 essentially the same type of information, is random testing CPU, OH1 (test floor area) and OH3 (test board area) in series with the analog signal and then sent to CPU, the CPU Random reported either fault. OH1 alarm occurs, first check the ambient temperature is too high, the cooling fan is working properly, then check the heat sink is clogged (food processing and textiles, there will be occasions, such alarm). If constant pressure water supply situation and the use of analog to time, usually when using the potentiometer 800 prone to this fault; the capacity of a given potentiometer can not be too small, not less than 1k; potentiometer fault termination of activities will appear This alarm. If the large capacity drive (30G11 above) 220V fan does not turn, it will overheat alarm, then you can check the power board fuse FUS2 (600V, 2A) for damage. OH3 alarm when there is usually a small capacitor driver board failure due to overheating, failure of the results (symptoms) is three-phase inverter output imbalance. Therefore, when the drive appears OH1 or OH3, you can check the drive the first three-phase power output is balanced. For OH overheat alarm, electronic heat meter board or the possibility of failure exists. G/P11 series inverter electronic heat meter to an analog signal, G/P9 series inverter switching signals for the calorimeter electronics. Ten, OH2 OH2 alarm and the alarm on the G/P9 series machines is concerned, because the definition of the existence of external alarm (E function), when the terminal is not defined in this external alarm jumper or short films in the virtual access, it will result in OH2 alarm; when the CN18 on the board at this time if the plug (plug detect temperature of the electric meter) loose, will result in 1, OH2 alarm and can not be reset. Once complete, the need to re-power on reset. XI, low-frequency output of the inverter in the low-frequency oscillator fault output (5Hz below), the motor output forward / reverse direction of frequent pulse, the inverter board is usually a problem. Second, a speed range of oscillation fault when the drive appears in the low-frequency three-phase unbalance (vibration motor performance) or oscillation in a speed range, you can try to modify the frequency of the carrier frequency (lower), can solve most of the time this problem. XIII, no output to run into trouble this failure two situations: First, if the LCD display after running the drive output frequency and voltage increase, while measuring the output no voltage, it is the driver board is damaged; second is running if the drive LCD display shows the output frequency and voltage remain zero, it is a problem with the motherboard. XIV, operating frequency does not rise when the drive after power failure, press Run key, run the indicator light (keyboard), but the output frequency of 0.00 does not always show up, usually the driver board is a problem, a new driver board for the block immediately after the problem. If the load when the drive can run up to the set frequency, but when you stay with a set of about 1Hz, it is because of overload, the inverter over the instantaneous current limit feature to work, then resolved by modifying the parameters; such as the F093, H100, H120, to modify these three parameters are generally able to return to normal.