1. Fault: no dehydration, no drainage
(b) fault maintenance: the failure is usually caused by the melting of the copper hedge fuse between the vs5 and the plug x2-1 on the pcb board。
It may be repaired at both ends of the copper smelt by direct welding of the melting wire in the 0. 5a glass tube。
Method of overhaul: if a two-way crystal tube vs5 is detected, then it is generally judged that the copper fuse has melted。
In addition, drainage pumps may cause similar malfunctions. The maintenance will be carried out simultaneously to check whether the drain pumps are stuck or the wire is burned。
Additional tip: err2 code indicates system drainage failure, i. E. Failure to report water drains within four minutes。
It is recommended that filters be cleaned first, that drainage pipes be checked for congestion, and that the internal laundry machine be opened for repair if external screening is normal。
2. Fragmentation: the remaining time shown is that of procedure 1
(c) maintenance of malfunctions: most of the malfunctions were caused by damage to the computer sheet single machine。
The replacement of the same computer panel would be sufficient。
Method of overhaul: the inspection shall focus on checking the normality of the power supply and the output signal of the single machine。
In addition, damage to the program control switch may result in similar malfunctions。
If the failure following the replacement of the computer plate continues, further routing of the switch and its outer subvoltage resistance is required。
Fragmentation: no water on board, later display of “err5”
Failed maintenance: the failure is usually caused by the opening of the ev1 line of the hydroelectric magnetic valve。
Welding and insulation can be done。
Method of repair: once on-board, test the working voltage at both ends of the ev1 loop will determine its goodness and badness - at normal times, approximately 155 ev1 and ev2 circuit resistances。
In addition, components such as drive tubes vt, transistor tubes vs3 are vulnerable and require further scrutiny。
Additional tip: the err5 code indicates that the water is not washed up within eight minutes。
Prior to maintenance, it is recommended to check whether the tap is open, whether the water pressure is normal, whether the water valve filter is blocked and, when external factors are removed, to focus on the ev1 and the associated driving circuits。
Fault phenomenon: electric motor noise is high, no dehydration and displays “err2”
Fault maintenance: the failure is usually caused by damage to the control plate transistors vs1, vs5。
Vs1 may be replaced directly by bt139 or bta16 and vs5 by bt131 or bt7049。
Method of repair: vs1 is identical to vs5 but different - vs1 can replace vs5, but not vice versa。
In addition, damage to water-level sensors may cause similar malfunctions。
Supplementary hint: bta 16-600b is broadly consistent with the parameters of the bt139 series (valid value 16a, triggering currents of about 50ma) and is interchangeable。
Vs3 (model bt131l) may also be replaced with bta16, bt139, bt7049, mac15a etc. Upon damage。
Fault: unheated and displaying “err3”
(b) failure maintenance: the failure is usually caused by damage to the temperature sensor (negative temperature factor thermally sensitive electrical resistance)。
Replacement of the same-specified sensor and ensuring that the seal is good enough to repair it。
Method of overhaul: the electrical resistance between the 36 feet of ic6 and the ground can be directly measured to determine whether the sensor is normal - if measured as a roadway, it means that the sensor has been damaged。
Damage to the temperature sensor switch may cause similar malfunctions。
Additional tip: err3 indicates that the thermostat is broken or short-circuited. Care should also be taken during maintenance to check whether the sensor plugs are loose and the line links are good; if both the sensor and the line are normal, further computer panels need to be checked。
6. Fault: no dehydration
Malfunction maintenance:
The breakdown was usually caused by damage to ry2 relays。
The same type of relay could be replaced。
Method of correction:
The repairs should focus on the ry2 two-end voltage conversion, and determine its normality by listening to relay insulation。
In addition, damage to the drive tube vt13 may result in similar malfunctions。
Note that after the ry2 damage, although the single machine still issues control instructions, an error in the coder feedback signal will cause the washing machine to stop and alert the police, at which point the code displayed may not be consistent with the actual failure。
7. Fault phenomenon: sudden increase in noise during washing
(b) trouble maintenance: failure is usually caused by damage to the drainage pumps. The same type of drainage pump could be replaced。
Method of correction:
Under normal conditions, there were approximately 155 direct-flow resistances to the pumps。
Damage to the transistor vs5, the drive tube vt6 may also cause similar malfunctions。
It is worth noting that the water pumps are working with less noise because the vs5 has used a zero-trigger method to smooth power and minimize high frequency interference。
If there is doubt about driving the circuit, check whether vt6 is open。
Additional reminder: the machine control panel has limited maintenance space and is not operational and needs to be maintained in a safe manner。
The err8 code indicates that the water level exceeds the protected water level and that excessive foam formation on the water level switches can lead to misreporting。
