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[8] Troubleshooting
Use the chart below to solve operational problems.
Contact the J. Morita Corp. or your local dealer if the problem cannot be
solved by following the chart below or for malfunctions and defects not
mentioned in the chart.
Problem Possible Cause Response Reference
No power when main
switch is turned on.
(Switch does not
light up.)
①Pug and socket inside plumb-
ing pit are not connected.
②Blown fuse.
①Connect plug and socket.
②Replace fuse.
[5]15.
[5]16.
Seat or backrest
does not move.
①Emergency stop activated.
②Temporary malfunction due to
electrical noise etc.
① Remove obstacles etc. to cancel
emergency stop.
②Turn main switch off and then back
on again.
[5]3.
[5]15.
Backrest moves
when foot pedal is
depressed
Attempt to over-ride the emer-
gency stop
Remove any obstacles etc. and
release emergency stop
[5]3.
Panel switches do
not work at all.
Interlock inside basin unit has
been activated
Turn lock OFF.
[5]9.
Panel switches do
not work properly
(cannot changeover
etc.)
①Pressing another switch simul-
taneously.
Press only one switch at a time
－
② Another switch is being held
down.
Check all switches on the panel.
Micromotor does not
rotate.
Fuse on motor’s printed circuit
board is blown.
Replace fuse.
[5]16.
Dentist’s instrument
does not work.
Handpiece lock is activated See if handpiece lock is activated.
Release if necessary.
[5]3.
No suction or weak
suction for vacuum
syringe or saliva
ejector
①Cut filter or vacuum tank need
cleaning.
②Cut filter or vacuum tank are not
properly connected. (Connection
is not tight enough.)
①Clean filter or tank.
②Connect all components properly.
[6]4.
[6]7.
Basin does not drain
properly.
Drain trap filter needs cleaning.
Clean filter.
[6]8.
uto Filler does not
supply water
Sensor surface need to clean
Clean filter.
[5]8.
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