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PROBLEM #1 (continued)
1. Chair or lift will not operate (continued).
PROBABLE CAUSE
TESTING PROCEDURE
CORRECTIVE ACTION
10. Assistant
10a. Remove screws
10a. Remove and
and Doctor's
securing switch
replace chair
manual
bezel to chair
wiring
switches are
and pull switch
harness.
faulty.
bezel out from
the chair.
Check for a
reading of 115v
or 220v as
applicable
between terminal
2 and ground.
(See figure 3-11)
If there is no
reading, wiring
harness is faulty.
10b. Check for a
10b. Remove and
reading of 115v
replace
or 220v as
switch.
applicable
between terminal
3 and neutral
line when top
side of control
switch is
depressed;
between terminal
1 and neutral
line (see figure
2-1, [Control
Board portion])
when bottom side
of control
switch is depressed.
If there is no
reading, switch
is faulty.
MD0373
A-4