Tadiran Telecom Swift Inverter 9U, Service Manual

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(6) E4- Sliding door error of floor standing
Explanation of
sliding door
error
Cause: For the model with upper and lower sliding doors, the position
of trap door is sensed via the upper and lower photoelectric switches.
When the sliding door closes, it will move upward until the upper
photoelectric switch senses the sliding door; when the sliding door
opens, it will move downward until the lower photoelectric switch
senses the sliding door. When the photoelectric switch cannot sense the
position of the sliding door normally, it will indicate “sliding door
error”.
Inspection path: Mechanical jam of sliding plate →Synchronous
motor → Can synchronous motor connect to 220V power →
photoelectric switch connection wire → Photoelectric switch → Main
internal control panel
Tools required
for inspection
Multimeter, photoelectric switch in normal condition
Frequent
problematic part
Mechanical jam of sliding plate, photoelectric switch, reversible
synchronous motor, main internal control panel
Inspection
procedure and
key points
1. Power on and observe whether there is mechanical jam in the sliding
plate. Note that new machines may be fixed by tapes, remove them.
2. If the sliding door slides normally when the machine powers on and
off but it still indicates “sliding door error”, then there’s something
wrong with the photoelectric switch.
3. If the sliding door does not slide when the machine powers on and
off, check the reversible synchronous motor to see whether the motor
is connected to 220V power or the motor’s wire is damaged.
4. If there is something wrong with the photoelectric switch, replace it
with another one in normal condition and repeat the above procedures.
If the error disappears, then it’s photoelectric problem; if not, then it’s
main internal control panel problem.
Special attention
1. Please confirm that it is a new sealed one when replacing the
photoelectric switch.
2. There are two photoelectric switches, so check the upper one when
the error occurs when powering off and check the lower one when the
error occurs when powering on.
3. Terminals connected to upper and lower photoelectric switches
should be connected accordingly because they have different colors.
Otherwise, it will lead to reverse switches for the sliding plate.