20
User Manual | MTI
527, 527W, & 526
TROUBLESHOOTING GUIDE
NOTICE/AVIS
For more information on this equipment, including circuit diagrams, parts and service manuals, and other descriptions,
please contact MTI.
Pour plus d’informations sur cet équipement, y compris des schémas de circuits, les manuels de service et pièces, et
autres descriptions, s’il vous plaît contacter MTI.
# SYMPTOM
PROBLEM CAUSE
SOLUTION
1
Chair will not function.
Chair power cord is not plugged in. Verify power cord is securely
connected at both ends.
2
Chair will not function.
Facility power receptacle problem.
Check facility’s power receptacle
with a known working device of
same voltage specifications.
3
Chair will not function.
Facility power receptacle problem.
Check facility circuit breaker to
verify it is not tripped.
4
Chair will not function.
Facility supply voltage is incorrect
voltage.
Verify voltage is per specifications
on chair serial number/product tag.
5
Chair motor will not function.
Electrical lockout switch is off.
Flip the Electrical Lockout Switch.
See “Electrical Lockout” on page
12.
6
Chair will not function.
Fuses have blown.
Verify fuses are not burnt. Replace
fuse(s) if necessary. See “Fuse
Replacement Instructions” on page
17.
7
Chair will not function.
Circuit board isn’t functioning
correctly.
Contact Customer Service.
8
Chair will not function or a
function is erratic.
Controls are not securely
connected.
Verify each control is securely
connected to the chair. See
“Unpacking and Set-up” on page
8 for instructions how to
securely connect controls.
9
Lift function is slower than usual
and only goes up about halfway.
One of the lifting column motors
is not functioning or circuit board
isn’t functioning correctly.
Contact Customer Service.
10
Back, Tilt, or Lift functions will not
function.
Circuit board has disabled motor(s).
The controller may disable
individual motor(s) to prevent
motor damage in the event that
a failure in the circuit board
is detected or unusual motor
operation has occurred.
Reset circuit board. For chairs with
a circuit board revision AG (June
2014) and after, flip the electrical
lockout switch to “OFF” position,
wait 2 seconds, and then flip the
toggle switch to the “ON” position.
See “Electrical Lockout” on page
12. For chairs with a circuit
board revision AD and prior, unplug
the chair from power and wait one
minute and plug back in.
