The cleaner does not work, the thermobimetal fuse is triggered
The blown fuse is detected by characteristic «clicks» when you turn on the purifier.
Causes of the malfunction and how to fix it:
- the cleaner rods are deformed and touch the body parts; in winter, the brushes may freeze to the glass. Inspect the cleaner mechanism and eliminate the causes that prevent the normal movement of parts;
- short circuit «mass» wires that supply power to the motor. Disconnect the wires from the cleaner and put in position «Turned off» key in the ignition switch. Then, with an ohmmeter or a test lamp at various positions of the cleaner switch lever, check whether they are shorted with «weight» yellow wires with a white stripe connecting the purifier to the switch. If there is a short circuit, then eliminate it;
- short circuit «mass» in the cleaner motor or short circuit in the armature winding. Disconnect the wires from the motor and check with an ohmmeter or test lamp for a short circuit between the motor wires and «weight». If there is a short circuit, then disassemble the motor and eliminate the short circuit. If closed to «mass» armature winding, then replace the gearmotor. Short circuit in armature winding (between turns) can only be detected with a special device at a car service station.
The cleaner does not work, the thermobimetal fuse does not work
Making sure the fuse «5» in the mounting block is intact, check if voltage is applied to the contact «53a» switch 7 (see fig. 128). To do this, remove the switch from the socket, disconnect the wiring block from it and, turning on the ignition, use a test lamp or voltmeter to check if there is voltage at the tip of the yellow wire with a white stripe, which is connected to the output «53a» switch. In this case, two cases are possible.
A) Contact voltage «53a» not served.
Causes of the malfunction and how to fix it:
- break in the wires supplying voltage to the contact «53a» switch. Check the wires, the reliability of their connections, replace damaged wires;
- the thermal bimetallic fuse in the cleaner is damaged. Check fuse, replace damaged.
b) Contact voltage «53a» served.
Causes of the malfunction and how to fix it:
- Faulty purifier switch. Check switch contacts for continuity. Replace defective switch;
- damaged wires connecting the contacts «53» and «53c» cleaner switch. Check the wires, clean their connections, replace damaged wires;
- wear or freezing of the brushes of the cleaner motor, severe oxidation of the collector. Disassemble the electric motor, clean the collector with fine-grained sandpaper, check the ease of movement of the brushes in the brush holders. Replace worn brushes.
The purifier does not operate intermittently.
Causes of the malfunction and how to eliminate them:
- damaged wires connecting the leads «I» and «S» relay with purifier switch. Check the wires, clean their connections, replace damaged wires;
- the purifier switch is damaged - the contacts do not close «53a» and «I» or «53rd» and «53». In the latter case, when the cleaner is turned off, the brushes will not stop in their original position. Check the short circuit of the switch contacts, replace the damaged switch;
- the purifier relay is faulty or its terminals are oxidized. Remove the relay from the mounting block and strip the terminals. To test the relay, connect its outputs «31» and «R» With «weight», A «15» - With «a plus» battery. Between withdrawal «S» and «weight» turn on the control lamp type A12, 3 W or a voltmeter. Connect output «I» relay with «a plus» battery. If the relay is working properly, then the lamp should light up, and the voltmeter should show a voltage equal to the supply voltage. Replace defective relay.
When the cleaner is turned on, the brushes do not stop in their original position
Causes of the malfunction and how to fix it:
- oxidation or loose contact of the limit switch contacts in the gearmotor. Remove the gearbox cover and clean the switch contacts. If necessary, bend the plate of the movable contact of the switch so that its contacts are clearly opened and closed by the gear cam of the gearbox;
- oxidation of the contacts of the electromagnetic relay in the purifier relay, when the purifier is turned off, the conclusions do not close «31c» and «S». Remove the cleaner relay, remove the printed circuit boards from the relay housing and clean the contacts of the electromagnetic relay;
- Faulty purifier switch - contacts do not close «53rd» and «53». Check switch contact closure, replace damaged switch.
Cleaner gearmotor works, brushes do not move
Causes of the malfunction and how to eliminate them:
- gear teeth broken. Replace gear;
- weak fastening of the crank on the axis of the gear motor gear. Check, tighten the crank fastening nut, positioning it so that it is parallel to the short draft of the cleaner and is directed towards the electric motor when the brushes are installed in their original position.