Chapter 5: Troubleshooting
Troubleshooting Symptoms
5-4 Service Manual
S17 Elevating base and canopy will
not go up or down.
Pedal switches are
disabled on Operator
Setup screen or Service
screen.
Try raising/lowering canopy
using the hand switches. Check
Setup screen or Service screen
to see if pedal switches are
disabled.
Defective toroidal
transformer
Check the toroidal transformer.
Refer to the Tips section (5.3.6).
Replace transformer if
defective.
No mains input to the
toroidal transformer
Replace relay board.
Output voltage from the
toroidal transformer is OK.
Defective fuse on relay
board.
Check fuses F5, F6 on the relay
board.
Defective 50 pin ribbon
cable between the relay
and control board
Check for continuity on pins 23,
24, 26, 27, 34 (motor control
and safety relay 2 control
signals). If defective, replace
the cable.
Output voltage from the
toroidal transformer is OK.
Fuses on relay board are
OK. Defective relay board.
Replace relay board.
S18 Elevating base will not go up or
down, canopy works OK.
Pedal switches are
disabled on Nurse Setup
screen or Service screen.
Check Operator Setup screen
or Service screen to see if pedal
switches are disabled.
Defective elevating base
motor.
Check the voltage to the
elevating base motor. Refer to
the Tips section (5.3.4). If the
voltage is OK, replace the
elevating base assembly.
Defective relay board. Replace relay board.
S19 Canopy will not go up or down
with pedal switches or hand
switches, elevating base works
OK.
Canopy motor turns.
Defective belt or clutch.
Check rail drive belt and clutch.
Refer to the Tips section (5.3.5).
Canopy motor does not
turn. Defective canopy
motor
Check the voltage to the
canopy motor. Refer to the Tips
section (5.3.4). If voltage is OK,
replace the canopy motor.
Canopy motor does not
turn. Defective 50 pin
ribbon cable between the
relay and control board.
Check for continuity on pins 23,
24, 26, 27, 34 (motor control
and safety relay 2 control
signals). If defective, replace
the cable.
Canopy motor does not
turn. Defective relay board.
Replace relay board.
ID Symptom Possible Cause(s) Action(s)
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