The design of the Mitsubishi GPS series elevator is mature, and the control system runs stably. If the maintenance is correct, the failure rate is very low, and the fault code can be easily checked, and the direction of maintenance can be easily found. However, if there is negligence, it is difficult to find the cause when the fault occurs. In the process of maintaining the GPS elevator for many years, the following representative faults have been handled, which are summarized and summarized for reference.
1 Failure of the brake core core stroke
The fault is like a GPS-2 type imported ladder that has been running for 8 years. Irregular emergency stop occurs, the frequency is not frequent, after the error can automatically level, open the door, you can continue to run. The fault code given by the P1 board is EA, ie the brake fault. However, the opening and closing of the brake is normal, the resistance value is normal (80-90 ohms), and the brake voltage is normal.
Analysis and resolution: The initial judgment is not a problem with the control cabinet, because if it is, it will be very frequent. Check the brake and find that the contact gap is too small, only 1.0mm, normal should be 2 ± 0.5mm. Then, the brake core was dismantled and found that due to lack of maintenance for many years, oil was accumulated in the core cavity, resulting in insufficient core travel, poor telescopicity, and the electromagnetic force did not reach the maximum value when the power was supplied. When the external voltage fluctuated or other reasons. The core shrinks and the brake contacts engage, causing a malfunction. Thoroughly clean the iron core and the cavity, re-adjust the iron core stroke to 1.5mm, and the brake gap opening to 2.5mm, the fault no longer occurs.
Summary: The iron core should be regularly maintained, at least once every 3 months. The brake and its contacts should be adjusted according to the specifications and checked frequently. The fault in this case is due to the resistance of the oil, so that the magnetic force generated by the coil is not enough to balance the brake. The spring force causes the brake contact to instantaneously engage, transmitting an error message to the main board, and the elevator stops.
2, the failure caused by the bow deformation
Symptom: A GPS-I imported ladder, running for 7 years, usually has few faults. After the wear of the guide shoe, after the replacement, the operation is close to the top position and there is an emergency stop. Then the slow train is leveled, and there is no problem in the non-top operation. There is no error display on the P1 board.
Analysis and solution: It is definitely related to the top-level equipment. Since it is not in the leveling position, the limit and limit switches are not considered first. First, the 1USD and USR switches are checked. When the manual connection is normal, the distance between the bow and the switch is 62mm (the standard is 58±). 2mm), too large. The 1USD and USR are operated by the local train, and the voltage of 1USD, USR and 420 is measured by the multimeter, and the voltage of 48V disappears at the switching operation point. Indicates that its action is normal. However, when running in the express train and hitting the USR, the voltage appears for a moment, which proves that the USR moves when the elevator runs through the USR at high speed, but the USR signal disappears instantaneously, causing an emergency stop. Subsequently, the entire sling was examined in detail, and it was found that there was a depression in the middle, the length was 30 mm, and the inward bending was 10 mm, which may be bent before installation. The switch roller jumps instantaneously when it runs on its surface. After correcting the bow deformation and adjusting the distance from the switch to 56mm, the fault disappears.
Summary: After the car replaces the guide shoe, it can not be restored to its original position, and the sling bow is deformed, causing rare faults. Therefore, when doing maintenance, try to ensure that the relevant dimensions do not change.
3, weighing device failure
The GPS series elevator car heavy signal is converted to the CPU by the voltage value given by the differential transformer of the rope head, then transmitted to the CPU, and then given the running curve according to the weight of the car, so the GPS elevator still has different loads. Ideal for comfort. If the rope head weighing device is not working properly and the weight value given is smaller than the set car no-load value, the elevator will not operate.
Fault phenomenon: When the weighing device is faulty, the driverless state cannot be operated, and the maintenance state can be operated. After the P1 board cancels the weighing function (WGHO knob is adjusted to 0), the driver status can be run, but the P1 board has no error display.
Analysis and solution: Generally, this type of failure is caused by debris between the brass sleeve of the rope head and the rope tie rod, which causes the operation of the copper sleeve to be blocked. It is possible to remove debris, but be careful not to add oil between the copper sleeve and the tie rod, because oil is more likely to accumulate oil. Then adjust the differential transformer spring size to 37.5mm. Finally, it is necessary to rewrite the no-load and half-load data to the P1 board.
4, the group control cabinet problem caused two parallel ladders can not run
Mitsubishi GPS series elevators have more than two parallel units with a group control cabinet, which specializes in additional functions such as fire return, emergency power supply operation and stop service.
Fault phenomenon: Two parallel GPS-I elevators have been working normally. Suddenly, two elevators and slow trains cannot run, but all peripheral lines are checked.
Analysis and solution: There are few opportunities for the same failure of two ladders at the same time. First consider the group control part. It was found that the FERR and EMRR were not attracted by the electrical device, and then the coil was checked for no voltage. Finally, the CR fuse was burned and everything was normal after the replacement.
Summary: Different ladder types have different design ideas. The above fault is due to the loss of pressure of a key loop 420C in the group control part, causing the NS (not service) function to take effect, thus causing all the ladders to be inoperable. If not familiar with its characteristics, the light is from a single machine. Checking the fault will not solve the problem.
Mitsubishi elevator failure troubleshooting ideas and methods
The elevator is mainly composed of mechanical, dragging and electric control parts. The drag system can also belong to the electrical system, so the fault of the elevator can be divided into mechanical faults and electrical faults. When encountering a fault, first determine which system the fault belongs to, whether it is a mechanical system or an electrical system, and then determine which part of the system the fault belongs to, and then determine which component or which component of the active component the fault is coming from.
How to judge which system the fault comes from? The commonly used method is: first set the elevator in the "overhaul" working state, and jog the elevator slowly or slow down in the car leveling position (in the machine room, car top or car operation). In order to ensure safety, first of all, you must confirm that all hall doors must be closed and can not be opened again during maintenance operation! Because the elevator is up or down in the inspection state, the electrical control circuit is the simplest jog circuit, how long the button is pressed How long does the elevator run? If the elevator does not press the button, the elevator will not move. How many distances need to be run can be controlled at will, the speed is very slow, the car running speed is less than 0.63m/s, so it is safer, easy for maintenance personnel to operate and find faults. Part, this is the elevator function specially designed for the maintenance personnel. There is no other intermediate control link in the electric circuit. It directly controls the elevator drag system. During the maintenance operation, the maintenance personnel can observe the abnormal sound, abnormal smell, and whether some indication signals are normal. As long as the elevator jog operation is normal, it can be confirmed that the main mechanical system is no problem, the main drag circuit in the electrical system has no problem, and the fault comes from the control circuit of the electrical system. On the contrary, the elevator cannot be jogged, and the fault comes from the mechanical system of the elevator or the main drag circuit.
First, the main drag system failure and its causes
In the jog operation, if it is confirmed that the main drag circuit is faulty, that is, the main circuit is faulty, you can analyze the fault location from the various links that constitute the main loop. The AC/DC power supply loop of any motor, including the control circuit of various functions, must constitute a closed loop of AC or DC current flow. The current is blocked or shunted at any part of the loop, which can cause malfunction and current is blocked. The broken part is the part where the fault is located. Of course, it should be confirmed that the power supply itself is normal, otherwise there is no current or current size, which is one of the parts that are prone to failure in different periods. The basic links that make up the main circuit of any elevator are roughly the same: from the three-phase power supply, through the air switch, the upstream or downstream AC contactor, the governor, the running contactor, the thermal relay, and finally the three-phase winding of the motor to form a three-phase alternating current. Loop. Different types of elevators have different speed control methods, and the types of governors are different. It is nothing more than frequency control, AC voltage regulation, DC voltage regulation or soft starter. Of course, the matching motors are different. The main circuit failure is also a common fault and important fault of the elevator.
Because the main drag system is a discontinuous and frequent action, after several years of elevator operation, the contactor contacts often have oxidation, contact spring fatigue, poor contact, contact dropout, inverter module and thyristor thermal breakdown or Broken, motor bearing wear and other failures. This is one of the quick ideas for finding faults, because any mechanical moving parts have a certain life, such as relays, contactors, micro switches, travel switches, buttons and other components, as well as frequently operating components, such as the car. With the cable, the bending action is often performed, and there is a possibility of a wire breakage failure.
Second, the mechanical system failure and the formation of the basic reasons
1. Faults caused by loose connectors
During long-term uninterrupted operation of the elevator, the fasteners are loose or loose due to vibration and other reasons, causing the machine to displace, fall off or lose the original precision, thereby causing wear and tear, which may cause damage to the elevator parts.
2. Faults caused by natural wear and tear
During the operation of mechanical parts, wear will inevitably occur. If the wearer reaches a certain level, new parts must be replaced. Therefore, the elevator must be overhauled after a certain period of operation, replace some wearing parts in advance, and cannot wait for the fault to be updated. It can cause accidents or unnecessary economic losses. In normal daily maintenance, as long as the time is adjusted and maintained, the elevator can operate normally. If the wear of the sliding and rolling running parts cannot be found in time and adjusted, the wear of the machine will be accelerated, resulting in mechanical wear and tear, causing accidents or malfunctions. If the wire rope is worn to a certain extent, it must be replaced in time, otherwise it will cause a big accident, and all kinds of running bearings, etc., must be replaced regularly.
3. Faults caused by the lubrication system
The function of lubrication is to reduce friction, reduce wear and prolong the life of the machine, and also play the role of cooling, rust prevention, shock absorption and buffering. If the lubricating oil is too small, the quality is poor, the type is not properly matched or improperly lubricated, it will cause overheating, burns, shaft hung or damage of the mechanical parts.
4. Faults caused by mechanical fatigue
Some mechanical parts are constantly subjected to stresses such as bending and shearing for a long time, which causes mechanical fatigue and reduces mechanical strength and plasticity. Some components are subjected to force exceeding the strength limit, causing breakage, causing mechanical accidents or malfunctions. For example, if the wire rope is subjected to tensile stress for a long time, it is subjected to bending stress, and wear is generated. When the wire is more severe, the force is uneven. A certain rope may be overstressed, firstly breaking the rope, increasing the force of the remaining strands, causing a chain reaction. In the end, all the ropes are broken and a major accident may occur. From the above analysis, as long as the daily maintenance work, regular lubrication of the relevant parts and inspection of the relevant fasteners, adjust the working gap of the machine, can greatly reduce the failure of the mechanical system.
Third, the failure of the electrical control system and its causes
1. Failure of automatic door opening mechanism and door interlock circuit
Because all the halls and car doors are the first condition for the elevator to operate, the elevator can not operate if the door interlock system fails. Such faults are mostly caused by poor contact or improper adjustment of various electrical components including automatic door locks.
2. Failure caused by insulation of electrical components
Insulation of electrical and electronic components will always cause insulation breakdown due to aging, failure, moisture or other causes after long-term operation, causing elevator failure due to open circuit or short circuit of the electrical system.
3. Faults caused by open or shorted contacts of relays, contactors, switches, etc.
In the control circuit composed of relays and contactors, the faults often occur on the contacts of the relay. If the contacts pass through a large current or are ablated by the arc, the contacts will be stuck and cause a short circuit. If the contact is blocked by dust or the reed of the contact loses its elasticity, it will cause an open circuit. The open or short circuit of the contact will invalidate the control circuit of the elevator and cause the elevator to malfunction.
4. Faults caused by electromagnetic interference
With the rapid development of computer technology, especially the microcomputer with greatly reduced cost is widely applied to the control part of the elevator, even using multi-computer control and serial communication transmission call signal, etc., the drive part adopts variable frequency variable voltage (VVVF) speed regulation. The system has become a popular standard design for elevators. In recent years, the frequency conversion door machine has also become fashionable, replacing the original DC door machine with resistance speed regulation. The wide application of the microcomputer has higher and higher requirements for the reliability of the elevator control system, which is mainly the anti-interference reliability. The main external factors encountered in elevator operation are: temperature, humidity, dust, vibration, shock, power supply voltage, current, frequency fluctuation, high frequency interference generated by the inverter itself, operator error and load Changes and so on. Under the influence of these disturbances, the elevator will produce errors and faults. The electromagnetic interference of the elevator mainly has the following three forms:
(1) Power supply noise: It mainly invades the system from the power supply and power supply incoming lines (including ground).
In particular, power supply noise is generated when the system shares power with other frequently changing large loads. When the power supply lead is long, the voltage drop occurs during the transmission process, and the induced potential also generates noise interference, which affects the normal operation of the system. The power supply noise may cause the microcomputer to lose part or most of the information, causing errors or malfunctions.
(2) Noise intruding from the input line. When the input line is in existence with its own system or other systems
When the ground line is common, the noise will be invaded. Sometimes, even if the isolation measure is used, it will still be affected by the electromagnetic induction coupled with the input line. If the input signal is very small, the system will easily cause errors and malfunctions.
(3) Static noise: It is caused by friction. The static electricity generated by friction is very small, but the voltage can be up to tens of thousands of volts.
The materials provided by the IEEE Reliability Physics Symposium show that people who walk on the blankets can carry up to 39KV, and those who work at the workbench can also reach 3KV, so when people with high potential touch the computer board, the human body The charge is discharged to the system, and the sharp discharge current causes noise, which affects the system operation and may even cause damage to electronic components. Anti-interference measures must be adopted for the above conditions, and the anti-interference measures themselves should be correct and reliable, otherwise the elevator will be faulty.
(4) Faults caused by improper electrical or electronic components damage or position adjustment: The electrical system of the elevator, especially the control circuit, has a complicated structure. In the event of an accident, it is necessary to quickly eliminate the fault. The experience alone is not enough, which requires the maintenance personnel to Master the working principle of the electric control circuit and the working process of the control link, clarify the relationship between each electrical and electronic components and their functions, and understand the installation position of each electrical component. Only in this way can the fault occurrence point be accurately judged, and Quickly rule out. On the basis of this, if you summarize and apply the actual work experience of others and yourself, it will be beneficial to quickly eliminate the fault and reduce the loss, because some faults in the operation are still regular.
Fourth, the electrical fault finding method:
When the elevator control circuit fails, the first thing to ask, see, hear, and smell is to know what is going on. The so-called question is to ask the operator or the person who reported the fault when the fault occurs. Is the query made before the fault occurs? Any adjustment or replacement of components work; the so-called look is to observe whether each part is working properly, see if the various signal indications of the control circuit are correct, see if the appearance of the electrical components changes color, etc.; the so-called listening, is to listen to the circuit when working Unvoiced; so-called smell, smell circuit components have abnormal smell. After completing the above work, the following methods can be used to find the fault of the electrical control circuit.
1, the order check method:
The elevator is operated according to a certain procedure. Each operation has to go through the cycle of selecting, orienting, closing, starting, running, changing speed, leveling and opening the door. Each step is called a work link, and each work link is realized. There is an independent control circuit. The program check method is to confirm which control link the fault occurs specifically, so that the direction of troubleshooting is clear, and it is important to correct the fault. This method is not only suitable for electrical control systems with contacts, but also for contactless control systems such as PC control systems or microcontroller control systems.
2, static resistance measurement method:
The static resistance method is to measure the resistance of the circuit with a multimeter resistance file in the case of power failure, because any electronic component is a PN structure, and its forward and reverse resistance values are different, any one electrical component. There are also certain resistance values, which are connected to the circuit or switch of the electrical components. The resistance value is not equal to zero or infinity. Therefore, it is judged whether the resistance value of the electrical resistance value meets the specified requirements. Checking an electronic circuit for good or bad can also be used in this method, and it is safer.
3. Potential measurement method:
When the above method cannot determine the fault location, the potential of both ends of each electronic or electrical component can be measured under the condition of power-on, because under normal working conditions, the potential of each point on the current closed-loop circuit is constant, so-called point potential refers to The potential of each point on the circuit component is different, and there is a certain size requirement. The current flows from the high potential to the low potential. The magnitude of the potential on the electrical and electronic components in the forward direction should conform to this law, so use a multimeter to go. If the potential of the relevant point on the measurement control circuit meets the specified value, the point where the fault is located can be judged, and then it is judged whether the current value is changed, whether the power supply is incorrect, or the circuit has an open circuit, or the component is damaged.
4, short circuit method:
The control link circuits are all switches or relays, and the contactor contacts are combined. When it is suspected that one or some of the contacts are faulty, the contact can be shorted by a wire. If the fault disappears after power-on, the judgment is correct, indicating that the electrical component is broken. However, it is important to remember that the short wiring should be removed immediately after the fault point is found. It is not allowed to replace the switch or switch contact with a short wiring. The short-circuit method is mainly used to find the breakpoint of the electrical logic circuit. Of course, this method can also be used to measure electronic circuit faults. The following describes the short-circuit method to find the fault of the door lock circuit.
Two people are on the car top, use the maintenance to move the elevator, use the inspection speed to run to a certain floor, open the automatic door lock protection plate, connect the No. 01 line with one end of the short wire, and check whether the contact is normal when the other end is short. The wiring touches the B point C to pull in, but the touch point A does not pick up, indicating that the door lock contact is broken. Loosen the short wire, repair the contacts or replace the door lock switch. However, with the short-circuit method, only the breakpoint of the "AND" logic relationship contact can be found, and it is not possible to find out whether the relay coil is short-circuited, otherwise the power supply will be burned out.
5. Open circuit method:
The control circuit may also have some special faults, such as the elevator stopping when there is no internal selection or outbound indication. This means that some of the contacts in the circuit are shorted. The best way to find such faults is to open the circuit. The contact that is suspected to be faulty is disconnected. If the fault disappears, the judgment is correct. The open circuit method is mainly used for the fault point of the "and" logical relationship.
6. Alternative method:
According to the above method, it is found that the fault is from a certain point or a certain circuit board. At this time, the component or circuit board that is considered to be problematic can be removed, replaced by a new or confirmed faultless component or circuit board, and if the fault disappears, it is judged. correct. On the contrary, it is necessary to continue to search. Usually, the maintenance personnel have spare parts for the vulnerable components or important electronic boards. Once the fault is replaced, the problem is solved. The faulty parts are brought back and slowly searched and repaired. A quick troubleshooting method.
7, experience troubleshooting method:
In order to be able to quickly troubleshoot, in addition to constantly summing up their own practical experience, we must continue to learn from other people's practical experience. Practical experience often makes the elevator's faults have a certain regular summary, and some experiences are important lessons exchanged with blood and sweat. We should also pay more attention to it. Often these experiences allow us to quickly troubleshoot and reduce accidents and losses. Of course, strictly speaking, elevator accidents should be eliminated. This is the responsibility of our maintenance personnel.
8, the basic idea of electrical system troubleshooting:
The electrical control system sometimes has complicated faults. Now the elevators are all controlled by microcomputers. The software and hardware are crossed together. When encountering faults, first of all, don’t be nervous. When you are troubleshooting, stick to it: first easy, then difficult, first and second, comprehensive consideration, some Lenovo.
The more faults in the elevator operation are the faults caused by the poor contact of the switch contacts. Therefore, when determining the fault, the external line and the power supply part should be inspected according to the fault and the indicator light displayed in the cabinet, that is, the door contact and the safety circuit. , AC power supply, etc., as long as you are familiar with the circuit, you can quickly solve it.
There is a problem with the door panel...?
The door panel adopts three-phase control of voltage regulation and speed regulation, and after closing the door, one of the phases continues to maintain a small torque through the resistance decompression to prevent the door from being opened. This is the reason why the Mitsubishi spvf ladder always outputs the door closing signal when running. Because of the long-term operation of the door panel, the requirements for the electronic components of the door panel are very high, and the door position signal is sampled by a grating disk. The position of the grating disk is very important. Although it seems to be dead, it can actually be fine-tuned. In the process of switching, you must see the LED light on-off-light-off-light process, otherwise the elevator door looks normal. Actually, the terminal motor is still running again. After a long time, the door panel is finished. The door panel can not be used unless it is completely watered. Otherwise, it is good to see the red modules. Generally, this thing is broken. If you change it, you will be ok.
Self-protected as soon as it runs...?
Generally, the elevator has a fault inspection system, and it is self-protected when it is running, indicating that the fault is only checked out during operation, such as elevator over current, encoder no output, drag data mismatch, etc., due to the earlier elevator The fault cannot be memorized, so after each power failure, a fault occurs that is self-protected after running. For this fault, we first find the reason for self-protection. In the absence of a maintenance machine, we first look at the encoder. The output of the encoder has 2.5V AC when the motor rotates, and the voltage should be less than 1VDC when stopped. No problem with the device, the external wiring is normal, it may be caused by over current, it may be the output of the actual over current, such as motor over current, elevator overload, may also be the problem of the current detection unit (dc-ct). On the E1 board, we can detect the bias voltage of ct. If it is not normal, we need to adjust the OFS potentiometer of dc-ct. How to adjust it in the SPVF installation and debugging manual.
The door is closed halfway again...?
This is a very simple problem. It is listed here because the frequency of such failures is too high. Generally, the connection line of the safety touch panel on the door is broken or short-circuited due to the frequent movement of the door. When the contact panel is connected, the time is broken and the door is closed and the part is opened again.
Floor indication does not flash when writing operation...?
In commissioning and maintenance, we often have to write the floor height, actually writing the number of floor pulses and the position of the deceleration point. If the floor indication does not flash when writing or blinks and then stops flashing, the data cannot be written. This is generally due to the abnormality of the door zone signal and the lower forced deceleration. The forced deceleration signal in one pass has the effect of forcing the floor to be 1. The door area is the key to the height of the sampling floor. Some overseas Mitsubishi door area signals have 2, one push relay, one input computer, don't see the DZ relay action or the DZ light on the computer board is bright, the door area signal is normal. .
IX. How does GPS-2 cancel the internal selection of a certain elevator?
Solution: change CC2
X. A Mitsubishi sp-vv (A) elevator, normal operation, even open the door can only open 10-30 cm, then the floor indicator flashes, PLC scan stops, recovery after power failure can sometimes use a few days recently It can only be used for a few hours. Recently, the fault has become more and more frequent. What are the problems of the masters?? Another: Sometimes 1DV shows the fault 35 What does it mean? Is there a problem with the encoder?
Solution: Display 35, the operation can not keep up with the set running speed.
You remove the encoder housing and look at it with a soft cloth. It is best to change the encoder, but West Germany has very few encoders.
The PLC did not scan and was internally self-protected.
XI. The fault of two GPS-3s is similar to that of you. I am one of the two parallel units. There is a ladder that automatically rises every three layers. No one in the basement will call on, and it will not go to independence. The outside call floor was flashed a bit like a red light. Finally, we took the faulty parallel communication cable out of the trunking and changed the socket. It is gone. We now suspect that it might be that one. There is a problem with the line
Twelve. A Mitsubishi SPVF elevator, the door machine does not rotate (can not open or close, but the door motor has a power supply, but can not move), the control cabinet related door signal, manually close the door, the elevator can walk the ladder , check the three line voltages of the door motor are 56, 28, 28, and the gate switch voltage of the door is 105.
Solution: The cause of the fault is that a wire with a socket on the control cabinet is not connected properly (pin problem), it is a UK socket.
13. Mitsubishi SPVV-A elevator, the roof failure occurred in the last two or three days. Fault phenomenon: The elevator has 10 floors and 1.75m/s. I observed and registered the 7th and 10th floors in the engine room. The elevator always showed the first floor unchanged until the top was displayed as the 10th floor.
Solution: This fault is caused by dust on the encoder disk
14. A GPS-II elevator, when the elevator goes up to deceleration of each floor, the motor will make a "beep" sound, it is difficult to hear. Especially when it reaches the top floor, it is more serious. The downside is normal.
Solution: It is a bearing on the worm that is broken. It can't be seen with the naked eye. It is only known after a change. The elevator traction machine has four bearings. The one next to the coupling is broken. The model number is 6311Z.
Fifteen. Mitsubishi GPS-2 (EF-cannot restart) Deadlock failure, elevator random floor level position crash, no floor display, no internal call, car light fan no power, control panel fault code (EF-cannot be re- Start), safety circuit, weighing device, parallel, room temperature and heat dissipation are normal, the fault occurs in the middle of the morning when the elevator usage rate is small, the fault frequency is 1-2 times a day, and the reset can be normal after emergency stop or overhaul. Use for a period of time, sometimes after the crash, pull the power and continue to crash
Solution: check as flat sensor is bad
16. Mitsubishi HOPE fault help, a Mitsubishi HOPE elevator car lighting is not bright, LCM relay pull-in, if the LCM relay does not pick up, the elevator car lighting is bright, check the line is no problem, has not investigated the problem
Solution: There is a problem with the sleep function of the door panel. The relay line is not connected, so that it can be powered. But there is no sleep function. Change the board! That thing often goes wrong
Mitsubishi GPS elevator is the mainstream product of Mitsubishi in recent years, with gps, gps-2, gps-cr, gps-3...
Main circuit charged lamp
Automatic or running
Door closing light
Phase failure (acr insurance) lamp
Secondary computer operation
Main computer operation
1.Stuage empty: It is displayed when it enters the fault display when no fault occurs. 2.A-NEG<A-MAX DECELERATING/A-NEG The range determined is smaller than the range given by INSTALLATION/A-MAX.3 .PHASE FAILURE When the elevator starts or stops, it is out of phase. 4.PHASE FAILURE When the elevator is running, the phase is wrong. Comparison of 3 and 4: If INTERFACES/QUIT is set to AUTOMAT, the phase adjustment elevator can automatically start running. 5.TEMP MOTOR Motive temperature Monitoring (accessed by P1.P2) overheats during shutdown. 6.TEMP MOTOR Motor temperature monitoring overheats during operation. 5 and 6 comparison: If INTERFACE/QUIT is set to AUTOMAT, the motor will automatically resume operation after cooling.7 .V1...V3 V1 speed is smaller than V2 or V2 is smaller than V1. 8.WRONG DIRECTION car runs a certain distance in the wrong direction. 9.NO STARTING Between monitoring the ZA-INTER/T-GUE counter-control signal, The control panel did not receive any feedback signal. 10.NO STOPING Although the brake has been turned off, the mechanical brake contactor "MB" elevator does not stop. 11.RV1 OR RV2 simultaneous operation signals in both directions. 12.RV1 /RV2 MISSING Signals when no direction is set.13.ta Cho drop out There is no speed feedback signal when the elevator starts or runs. 15-19.. The minimum value of the allowable range has been reached. The value of the corresponding option should be increased. 20. EEPROM ERROR The controller has the wrong content and contact ZIEHL-ABEGG. 21. The entire contents of the EEPROM cleard controller are erased and must be rewritten by the manufacturer. This information is displayed when the control panel software is replaced by a different new digital. 22-25. The allowed range has been reached. For the maximum value, the value of the corresponding option content should be reduced. The value of 26..v3<1.5v-nen travel/v3 may not exceed 1.5 times the value of INSTALLATION/V-NEN.27. SWITCH OFF! The control screen must be turned off for a short time. 28.SHORT TRAVEL OFF? Indicates that short-range operation is not possible. Enter the erased "V1" value before entering "V-ZE3". The connection between the POWER STAGE motor and the POWER STAGE (IDV interface) is still in the unclosed state during the test. 30. VZ<V-3 TRAVELING/VZ option value is smaller than the value of TRAVELING/V-3. 31.VZ TOO SMALL reaches the limit line. 32.STOP INPUT! While the contents of an option are being changed, the POWER STAGE temperature monitoring on the .33.TEMP CONTROLLER IDV is overheated. 34.DRIVE WITH BREAK is stopped (the mechanical brake is closed "MB" action), the elevator is still In operation, ie with brake operation. 35.N-PROG>>N-REAL The elevator failed to run at the given speed. 36.N-PROG<<N-REAL The actual speed is much higher than the set speed.37 .MTR STILL TURNS The motor is still rotating, although it has been mechanically braked (controlled by relay "MB") 38.FALSE ROT FIELD The power cord is not connected to the phase, the corresponding two phases on the control board and the power supply have to be changed. Please note that the two phases on the hard board are connected in the same way. 39.PARA-CHANGE? The contents of the option have been changed during the run. 40.MOTOR-CHANGE? In operation, the second motor is replaced.
18. Mitsubishi SP-VF for help, I have an elevator that is broken in normal. All the internal buttons are on, the elevators go on the floor, stop at the first floor, and the layer that just stopped is bright. The elevator is just like this.
Solution: Move the car control panel to the computer room and try it. There is no problem. Everything is normal. I solved the normal problem of pressing the control panel in the car. It is estimated that the contact of the serial interface of the car control panel has caused interference.
Nineteen. Mitsubishi door machine failure for help, a Mitsubishi SPVF elevator, there is a door machine does not rotate (can not open or can not be closed, but the door motor has a power to reach, but can not move), the control cabinet related door signal, manually closed After the door, the elevator can walk the ladder. The voltage of the three wires of the door motor is 56, 28, and 28, and the voltage of the door switch is 105. The door plate and other ladders are replaced. The board is good.
Solution: After detailed inspection, it was found that the door machine lacked phase.
Twenty. Mitsubishi GPS-II fault help, my unit has a Mitsubishi GPS-II elevator, the fault phenomenon is: there is an emergency stop during the elevator running, then automatically leveling, found that the SWDT indicator on the P1 board is not lit, then The elevator will not run. After re-powering, the elevator automatically writes the program, after which the elevator is normal.
Solution: Replace the P1 board and return to normal.
Twenty-one. Mitsubishi SPVL asks for help. An 18-story SPVL elevator has always been an ordinary burning high-power transistor. The temperature insurance is good, the drive board has been replaced by a few pieces, and the large capacitor has been replaced. The elevator is still running for a few days.
Solution: Normal after replacing the E1 board.
Twenty-two. Mitsubishi SP-VF failure for help, seeking Mitsubishi SP-VF elevator 3 floors and 3 stations. Fault status. The elevator stops at the first floor but the uneven level is high. Do not show. When the safety circuit is connected, the car will immediately emit an over-sounding sound, and the first floor of the engine room will flash continuously. The elevator just won't go.
Solution: The safety relay is broken. There is also a serious wear on the door belt of the back door. There is a great burnt smell.
Twenty-three. A Mitsubishi VVVF elevator was originally normal. From the beginning of March this year, it suddenly stopped in an emergency. In the event of a fault, the display of the station was extinguished. The car lighting was normal, usually once in five or six days. Such a fault, the elevator position is not regular at the time of failure, and there is no regularity in the running direction. Check the power supply and replace the power supply cable and switch. According to the commissioning outline, the various voltages are required to meet the requirements, and the safety circuit is also normal. The fault has not been solved.
Solution: Blow the output pins on the P1 E1 W1 board until the fault has not occurred again.
Twenty-four. Ask for GPS_2 door machine, adjust a GPS_2 elevator door machine, switch the door speed to adjust the speed after running several times or lock the ladder and then open the door machine
Speed will change, how can it not be fixed
Solution: The distance between the car door lock switch and the photoelectric switch is 9, 5 respectively.
Twenty-five. A Mitsubishi GPS-2 passenger elevator, a total of 32 floors, no stop in the middle of the 1st to 5th floors, there are two access doors, the elevator in normal use, the user reaction sometimes runs on the 6th to 7th floor When the elevator suddenly stops, then the anti-flat floor to the first floor, and then everything is normal, and sometimes the above phenomenon occurs on the 7th or 8th floor, near the leveling, about once every day around 6 pm, the door lock, The safety circuit of each switch, inspection door switch, gate ball, door knife and so on has been checked. The P1 board and the door board have been replaced. The fault is still old. The user has great opinions. Note that there are three parallel ladders on this site. There is a problem, the 380V power problem should be eliminated
Solution: The problem has been solved, and the weighing has been repeated. No faults have been found in these days!
Hope elevator running for a period of time, the elevator suddenly stops, the cause of the failure: no display, the car light is not bright, the button does not work, the computer seven-segment digital display EB to the car transmission error. After many inquiries, I learned that there is a problem with the chip of the SBC-C in the car. It is normal after the replacement.
Fault phenomenon: elevator control cabinet overhaul up elevator does not drive / service center
Ladder type Mitsubishi sp-vf
The reason analysis can be seen from the maintenance control circuit 2-20. The automatic one-time repair relay 60 is placed in the inspection position, the DS diode is damaged, or the up button UP is not in place or damaged, the 89 relay does not work, the main contactor and the brake The contactor LB must not be powered and the elevator will not start.
Remedy Check that TB24 has +125V voltage, and there is no voltage across the 89 safety loop relay coil, indicating that the circuit is faulty. After the power is cut off, the resistance of the 60 relay is normally closed. When the up button is pressed, the two contacts are turned on, and the D-S diode is suspected to be damaged. Use the multimeter resistance file to measure the open circuit of the diode. After replacing the protection diode D-S, the relay of No. 89 is activated. Press the up button of the maintenance, and the elevator will normally move up.
Fault phenomenon: elevator car top maintenance uplift elevator does not drive / service center
If the automatic-inspection switch or the jog up button contact is not good, the elevator will not drive.
Remedy Set the auto-overhaul switch to check the position and press the up button UP. The other person cooperates with the machine room to observe whether D89 is on. It is found that D89 is not lit, indicating that the 89 relay circuit is faulty. Check that the car top junction box line is normal, the automatic-inspection switch and push button switch are normal. Go to the machine room to check that the 89 relay wiring is not loose, and the measuring coil is normal without open circuit. Finally, re-tighten the terminals on the W1 board, press the plug again, and then power up and move up. Note that the wire contacts on the 89 relay to W1 board have loose contact failure.
Fault phenomenon: the elevator does not open the door under any state, does not close the door / service center
Ladder type Mitsubishi sp-vf
Analysis of the cause The elevator can not open and close the door under the automatic and maintenance state, indicating that the main circuit of the switch door motor and the control circuit may have problems. The door motor of the Mitsubishi elevator is a three-phase AC 110V. If the power transformer is damaged without 110V output, the door motor will not operate. The switch gate signal is controlled by the W1 board. If W1 has no output switch gate signal, of course, the door will not be opened or closed.
Remedy Check that the power supply 110V is normal, confirm that the three-winding of the door motor is symmetrical, and the door motor has no fault. When the manual contactor is actuated, the main contact is in good contact. Finally, it is suspected that the thermal relay may be faulty. Observe that the thermal relay has actually been operated before, and there is no reset. After the microcomputer W1 receives a thermal relay action signal, it cannot be closed under any state. It may be accidental overcurrent, the door machine thermal relay action. After resetting the thermal relay, the switch door is normal.
Fault phenomenon: the elevator has poor leveling accuracy/service center in all layers except the end station
Ladder type Mitsubishi sp-vf
Analysis of the reason SP-VF Mitsubishi Elevator is controlled by the forced speed change switch at the upper and lower terminal stations. The leveling accuracy is good, indicating that the position of the deceleration switch is correctly installed and the deceleration speed mode is correct. The speed reduction deceleration point of the middle layer is completed by a simulated elevator composed of a microcomputer combined with a rotary encoder. The simulated elevator is one step ahead of the actual elevator when the elevator is actually started (given a advance amount). The purpose is to detect where the target layer is, that is, to stop at the floor to be answered, and stop at the simulated elevator to the destination floor. At the same time, the elevator will send a deceleration signal, and when decelerating to the target layer according to the deceleration mode, the PAD leveling switch signal is obtained, so that the elevator is leveled off. Therefore, the accuracy of the level of the middle layer other than the end station determines whether the time advance and the deceleration speed mode of the simulated elevator first are correct, which is equivalent to the accuracy of the deceleration point position before the elevator leveling.
Remedy Like this kind of fault belongs to the microcomputer software debugging problem. The manufacturer's software commissioning personnel can solve the problem of modifying the advance time and deceleration speed mode of the simulated elevator.
Fault phenomenon: the elevator in the car is not running/service center
Ladder type Mitsubishi sp-vf
Analysis of the cause When the car is overhauled, after the automatic-inspection switch is set to “overhaul”, the 60 relay is de-energized, so that the 89 safety circuit relay is de-energized, the elevator cannot start automatically, and the manual jog operation state is lost due to the loss of the control of the microcomputer. After the 89 safety circuit relay is powered by the jog, the LB brake contactor and the main contactor are energized to realize the jog operation of the elevator. During the car interior inspection, the elevator up button is pressed, and the 89 relay is energized, and the elevator can be moved up. If the jog up button, the D-S diode component, and the 89 relay in the up-going loop are faulty, the jog up cannot be achieved. The uplink signal is controlled by the SSU. If the direction control circuit is faulty, that is, after the UP button is pressed, the SSU point does not get a high potential, and the uplink jog operation cannot be realized.
Remedy Check the measurement elevator up button UP, the diode component D-S is turned on, and the 89 relay is also fault free. The D-S component of the directional control circuit is also turned on without failure. So where is the fault? It is suspected that the car top inspection switch has not been reset to the "automatic" state, because the maintenance personnel have just been removed from the car top. On the top of the car, it is true that the car top automatic-overhaul switch is still in the "overhaul" state. As can be seen from the figure, at this time, the car interior maintenance circuit does not receive +125V control power, so it is impossible to jog up. After the car top automatic-inspection switch is set to "automatic" position, the car interior maintenance operation is normal. Failures like this should be learned, and things that have been done must be restored. For example, when troubleshooting, it is necessary to short-circuit some circuits to verify whether there is any fault. Afterwards, you must not forget to remove the short wiring in time, otherwise it will cause large losses and major accidents.
This article tags: elevator Mitsubishi elevator elevator knowledge elevator technology elevator common fault elevator resources