APPENDIX
DENTAL CHAIR TROUBLESHOOTING GUIDE
───────────────────────────────────────────────────────
PROBLEM #1
1. Chair or lift will not operate.
PROBABLE CAUSE
TESTING PROCEDURE
CORRECTIVE ACTION
1. Power cord
1. Visual inspection.
1. Plug in power
not plugged
cord or turn
in to supply
circuit breaker
receptacle
on.
or circuit
breaker is off
2. Building
2. Notify proper
power supply
check for reading
personnel.
fault.
of 115v or 220v
as applicable at
power supply
receptacle. If
there is no
reading, the
problem is with
building power supply
3. Chair power
3. Visual inspection.
3. Connect.
cord not
plugged into gray
cord at rear of lift.
4. Four
4. Visual inspection.
4. Make a secure
conductor
connection.
plug on chair
not securely
plugged into
black coil coil
at rear of lift
NOTE: On newer model chairs the chair-base connector is mounted in front of the
chair. (See figure 2-3.)
MD0373
A-1