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Alarm frequency converter
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(1) the OC alarm
Keyboard panel LCD display: over current plus, minus, constant speed.
For a short time and high current OC alarm, general is the driving plate current detection circuit is out of the question, the module may also have impacted (damage), there may be reset to continue after the failure, the cause is basically the following situation: long motor cables, cable selection output leakage current caused by high or critical output cable loose joints and damaged cable caused by load effect produced when arc current increase.
Small capacity (below 7.5G11) 24V fan power supply short circuit of frequency converter can also be caused by the OC3 alarm, when the 24V fan power on the motherboard will damage the normal function, other board. If the "1, OC2" alarm and cannot be reset or power on display "OC3" alarm, then the motherboard may be a problem; if a press RUN key to display "OC3" alarm, is driving board was bad.
(2) the OLU alarm
Keyboard panel display: LCD converter over load.
When the G/P9 series inverter this alarm can be solved by three methods: first, revise the "torque", "acceleration and deceleration time" and "energy saving operation" parameter setting; secondly use output card meter to measure the frequency converter is really too large; finally, using the oscilloscope observation motherboard left detection point angle output to judge whether to have damaged the motherboard.
(3) the OU1 alarm
Keyboard panel LCD display: acceleration over voltage.
When the general inverter appears "OU" alarm, should first consider the cable is too long, the insulation is aging, electrolytic capacitor of DC middle part is damaged, at the same time, in view of the big inertia load can consider to do online self-tuning about motor. Also in the startup with a multimeter measure the DC link voltage, if the voltage measuring instrument display and operation panel LCD display voltage is different, the detection circuit board has fault, the need to replace the motherboard. When the DC bus voltage is higher than 780VDC, frequency converter for OU alarm; when below 350VDC, LU frequency converter under voltage alarm.
(4) the LU alarm
Keyboard panel LCD show: under voltage.
If the equipment is often "LU under voltage alarm," may be considered the initialization parameters of transducer (H03 to 1 after the confirmation), and then improve the carrier frequency of the inverter (parameter F26). If the E9 device LU under voltage alarm and cannot be reset (power), is the drive plate out of the question.
(5) the EF alarm
Keyboard panel LCD display: to ground short circuit fault.
G/P9 series inverter this alarm may be the motherboard or Holzer element malfunction.
(6) the Er1 alarm
Keyboard panel LCD display: the memory exception.
Treatment of G/P9 series inverter "ER1 reset" fault: remove the FWD CD short circuit plate, the power on, press and hold down the RESET key energy, know LED power indicator lamp extinguished and then let go; and then re power on, see "ER1 does not reset the fault is removed, if by this method can not lift, then the internal code that has been lost, can only change the motherboard.
(7) the Er7 alarm
Keyboard panel display: LCD self-tuning bad.
The emergence of G/P11 series inverter this fault alarm, is generally charge resistance damage (small capacity converter). Another is to check whether the internal contactor pull (large capacity inverter, 30G11 or above; and when the frequency converter with load output only when the alarm), the auxiliary contact of the contactor is good contact; if the internal contactor does not pull can first check the drive plate on the 1A insurance tube is damaged. May be driving plate out of the question - two core signal check whether it is normal for the motherboard.
(8) the Er2 alarm
Keyboard panel LCD panel display: abnormal communication.
The transducer above 11kW when this alarm will 24V fan power supply short circuit (motherboard problem). For E9 series machine is usually DTG element panel damage, the damage of components will causes damage to the motherboard, the performance for the replacement of the display panel after the power on operation immediately when the OC alarm. But for the G/P9 machine power on display "ER2" alarm, is the drive capacitance board failure.
(9) the OH1 overheating alarm
Keyboard panel LCD display: fin overheating.
OH1 and OH3 is essentially the same signal, CPU random testing, OH1 (detection of bottom parts) and OH3 (detect the motherboard part) analog signal series and then to the CPU together, and the CPU random quote any fault. "OH1" alarm, should first check the environmental temperature is too high, the normal work of the cooling fan is, second is to check the heat sink is clogged (food processing and textile occasions such alarm). If in the constant pressure water supply situations and the use of analog to the timing, in general use 800 ohm potentiometer is prone to this fault; given potentiometer capacity can not be too small, can not be less than 1K ohm; Potentiometers activity termination wrong will also appear this alarm. If the big capacity frequency converter (more than 30G11) of the 220V fan does not turn, will overheat alarm, at this time can check the power supply board insurance tube FUS (600V, 2A) is damaged.
When "OH3" alarm, generally drive small capacitors on the board due to overheating and failure, failure of the results (symptoms) is a three-phase inverter output imbalance. Therefore, when the converter appears "OH1" or "OH3", the three-phase output can first check whether the balance of electric converter.
For OH overheating alarm, the motherboard or electronic heat meter the possibility of failure also exists.
G/P11 series inverter electronic heat meter for analog signal,
G/P9 series inverter electronic heat meter for the switching signal.
(10) 1, OH2 and OH2 alarm alarm
The G/P9 series machines, because the external alarm definition exists (E function), when the external alarm defined terminal no short tab or in the use of this short piece of virtual connection, will
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