APPENDIX
DENTAL CHAIR (MODEL JSR) TROUBLESHOOTING GUIDE
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PROBLEM I. Chair or lift will not operate.
TESTING PROCEDURE
CORRECTIVE ACTION
PROBABLE CAUSE
1. Power cord not
1. Visual inspection.
1. Plug in power cord or
plugged in to supply
turn circuit breaker on.
receptacle or circuit
breaker is off.
2. Building power
2. Notify proper
supply fault.
reading of 115v or 220v as
personnel.
applicable at power supply
receptacle. If there is no reading, the
problem is with building power
supply.
3. Chair power cord 3. Visual inspection.
3. Connect.
not plugged into
gray cord at rear of
lift.
4. Four conductor
4. Visual inspection.
4. Make a secure
plug on chair not
connection.
securely plugged into
black coil cord at rear
of lift. NOTE: On
newer model chairs
the chair-base
connector is
mounted in front of
the chair (figure 2-2).
5. Motors not
5. Visual inspection.
5. Plug in each motor.
plugged into chair
electrical junction
box.
MD0371
A-1