Steris Amsco 3085 SP, Maintenance Manual

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5-7
764332-898
5.2 ELECTRICAL TROUBLESHOOTING
See Troubleshooting Guide ( Table 5-1 ) for a sequence
of steps to use to identify and correct most electrical
problems encountered. Also refer to the electrical
schematics behind
R
EFERENCE
D
RAWINGS
tab when
using the Troubleshooting Guide.
Refer to S
ECTION
3.3, H
YDRAULIC
S
YSTEM
, when the
cause of the problem appears to be hydraulic.
Refer to Table 5-2 , Battery Diagnostics, to determine
proper battery voltages (battery-operated tables only).
Electrical Troubleshooting Guidelines:
• Before replacing any PC boards or other components
suspected of being defective, ensure all cable plugs
are fully inserted into their respective jacks.
• Ensure all cable pins are installed and locked into
place on the plug(s).
• When making any dc voltage measurements,
reference the dc ground, not the chassis ground.
(These two points are isolated from each other.)
The pump motor and/or the hydraulic solenoids
can be checked by applying 24 Vdc only directly to
the component.
• To completely disconnect power to the table, the line
cord as well as the batteries must be disconnected.
• When resoldering or replacing any of the table or
floor-lock microswitches, isolate the control by
disconnecting its associated plug.
Figure 5-1. Amsco 3085 SP Surgical Table Block Diagram
26. Table articulates with NO
input from hand control or
override command. Electrical system
malfunction Faulty override switch board from liquid
exposure - replace override switch board
and verify RTV is applied around bellows
for fluid intrusion protection.
Table 5-1. Troubleshooting Guide (Cont’d)
Situation Cause Service Instructions
Table 5-2. Battery Diagnostics
Battery
Low Battery LED Status
ON Flashing
Motor
22.7 Vdc 21.6 Vdc
Control 23.6 Vdc 22.7 Vdc
CAUTION – POSSIBLE EQUIPMENT
DAMAGE: Isolate the coil and/or pump
motor from the power control by
disconnecting the wires on the motor
terminal board, or slip the wires off the
solenoid coil that is being worked on.