Ohio 7300 Service manual

Schaerer Mayfield USA, Inc.

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7300

Modular Surgery

Table

Service and

Parts Manual

SMI

7300

SF-1586 Part No. 504-0023-00 Rev. E (5/04)

CA802000

FOR USE BY SMI
TRAINED TECHNICIANS
ONLY

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TABLE OF CONTENTS

Section/Paragraph Page Section/Paragraph Page

IMPORTANT INSTRUCTIONS

General Safety Instructions........................................ iv

Warnings.................................................................... iv

Warranty Instructions ................................................. iv

SECTION I GENERAL INFORMATION

1.1 Scope of Manual ......................................... 1-1

1.2 How to Use Manual ..................................... 1-1

1.3 Description of 7300 Modular Surgery

Table ....................................................... 1-1

1.4 Specifications ............................................. 1-7

1.5 Parts Replacement Ordering ....................... 1-8

1.6 Special Tools .............................................. 1-9

SECTION II TESTING AND TROUBLESHOOTING

2.1 Operational Test.......................................... 2-1

2.2 Troubleshooting Procedures ........................ 2-6

SECTION III SCHEDULED MAINTENANCE

3.1 Scheduled Maintenance .............................. 3-1

SECTION IV MAINTENANCE/SERVICE
INSTRUCTIONS

4.1 Introduction ................................................. 4-1

4.2 Checking Oil Level / Adding Oil To

Reservoir .................................................. 4- 1

4.3 Calibration Of Return To Level / Neutral

Position .................................................... 4- 2

4.4 Hand Control Button Board

Removal / Installation ............................... 4-4

4.5 Hand Control Board

Removal / Installation ............................... 4-4

4.6 Seat Cylinders Synchronization

Procedure ................................................. 4- 5

4.7 Column Cylinder Slave Line Volume

Adjustment ............................................... 4- 7

4.8 Trendelenburg Cylinder

Removal / Installation ............................... 4-9

4.9 Trendelenburg Pilot Operated Check Valve

Removal / Installation ............................. 4-11

4.10 Trendelenburg Cylinder Orifice(s)

Removal / Installation ............................. 4-13

4.11 Trendelenburg Position Sensor

Removal / Installation ............................. 4-14

4.12 Lateral Tilt Cylinder

Removal / Installation ............................. 4-15

4.13 Lateral Tilt Orifice(s)

Removal / Installation ............................. 4-16

4.14 Lateral Tilt Pilot Operated Check Valve

Removal / Installation ............................. 4-18

4.15 Lateral Tilt Position Sensor

Removal / Installation ............................. 4-20

4.16 Seat Cylinder

Removal / Installation ............................. 4-21

4.17 Seat Cylinder Orifice(s)

Removal / Installation ............................. 4-26

4.18 Seat Cylinder Pilot Operated Check Valve

Removal / Installation ............................. 4-27

4.19 Seat Position Sensor

Removal / Installation ............................. 4-28

4.20 Column Cylinder

Removal / Installation ............................. 4-31

4.21 Column Pilot Operated Check Valve

Removal / Installation ............................. 4-34

4.22 Typical L.H. and R.H. Control Valve Solenoids

Removal / Installation ............................. 4-35

4.23 Typical Base Mounted Control Valve Solenoids

Removal / Installation ............................. 4-37

4.24 Discharge Filter Replacement .................... 4-39

4.25 Main Floor Lock or Outrigger

Floor Lock Cylinder

Removal / Installation ............................. 4-41

4.26 Motor Or Motor Pump

Removal / Installation ............................. 4-42

4.27 Pump Unit

Removal / Installation ............................. 4-44

4.28 Motor Pump Output Check Valve

Removal / Installation ............................. 4-47

4.29 Motor Pump Pressure Relief Valve

Removal / Installation ............................. 4-48

4.30 Outrigger Pressure Relief Valve

Removal / Installation ............................. 4-50

4.31 Main Controller Board

Removal / Installation ............................. 4-53

4.32 Charging / Power Driver Board

Removal / Installation ............................. 4-55

4.33 Emergency Override Panel

Removal / Installation ............................. 4-57

4.34 Distribution Board

Removal / Installation ............................. 4-58

4.35 RFI Filter

Removal / Installation ............................. 4-59

(*) Indicates that there has been a serial number break for the illustration

and that there are additional point page(s) following the original page.

© Schaerer Mayfield USA, Inc. 2004 Page iPrinted in U.S.A.

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4.36 Transformer

Removal / Installation ............................. 4-61

4.37 Line Power Pilot Lamp

Removal / Installation ............................. 4-63

4.38 Plug Receptacle

Removal / Installation ............................. 4-63

4.39 Batteries

Removal / Installation ............................. 4-64

4.40 Primary Thermostat

Removal / Installation ............................. 4-65

4.41 Secondary Thermostat

Removal / Installation ............................. 4-66

4.42 Floor Lock Status Switch

Removal / Installation ............................. 4-66

4.43 Head Section Gas Spring

Removal / Installation / Adjustment ........ 4-68

4.44 Foot Control Interface Board

Removal / Installation ............................. 4-69

4.45 Typical Latch Mechanism

Removal / Installation ............................. 4-70

4.46 Typical Floor Lock Check Valve

Removal / Installation ............................. 4-71

4.47 Articulating Leg Transfer Board

Adjustments............................................ 4-73

4.48 Bell Footpiece Traction Crank Assembly

Disassembly / Assembly ........................ 4-75

SECTION V SCHEMATICS AND DIAGRAMS

5.1 Electrical Schematics / Wiring Diagrams..... 5-1

5.2 Hydraulic Flow Diagram................................ 5-4

5.3 Hand Control Messages ............................... 5- 5

5.4 Error Code Chart .......................................... 5- 6

SECTION VI PARTS LIST

6.1 Introduction ................................................. 6-1

6.2 Description of Columns ............................... 6-1

6.3 Torque Specifications And Important

Assembly Notes ....................................... 6-1

Pictorial Index ............................................. 6-2

Accessories ................................................. 6- 3

Labels And Decals ....................................... 6-4

Cushions and Table Tops............................. 6- 5

Covers and Shields ...................................... 6-6

Head Section Assembly............................... 6-7

Bridge Components...................................... 6-8

Lateral Tilt Cylinder Assembly...................... 6- 9

Upper Hose Connections............................ 6-10

L.H. Side Components ............................... 6-11

L.H. Control Valve Assembly ..................... 6-12

L.H. Seat Cylinder Assembly ..................... 6-13

R.H. Side Components............................... 6-14

Emergency Override Panel Assembly ........ 6-15

R.H. Control Valve Assembly..................... 6-16

R.H. Seat Cylinder Assembly..................... 6-17

Column Assembly Components ................. 6-18

Column Assembly ...................................... 6-19

Trendelenburg Cylinder Assembly ............. 6-20

Column Cylinder Assembly ........................ 6-21

Hand Control Assembly.............................. 6-22

Base Cover Components ........................... 6-23

Base Hydraulic / Electrical

Components............................................ 6-24

Electrical Control Box Components ............ 6-25

Base Hydraulic Plumbing ........................... 6-26

Base Control Valve Assembly.................... 6-27

Hydraulic Pump / Motor Components ......... 6-28

Hydraulic Motor Components ..................... 6-29

Hydraulic Pump Components ..................... 6-30

Floor Lock Components ............................. 6-31

Main Floor Lock Cylinder Components ....... 6-32

Outrigger Floor Lock Cylinder

Components............................................ 6-33

Caster Components ................................... 6-34

Power Driver Board Components................ 6-35

Battery Components .................................. 6-36

10210 Perineal Post Assembly .................. 6-37

10322 Cross Arm Support Assembly ......... 6-38

10360 Safety Strap .................................... 6-39

10395 Lottes Anklet ................................... 6-40

10508 Well Leg Support Assembly............. 6-41

10509 Equipment Cart................................ 6-42

10620 Drape Stand Assembly .................... 6-43

10821 Removable Siderail.......................... 6-44

10823 Leg Transfer Board .......................... 6-45

10824 Horizontal Perneal Post ................... 6-46

10825 Tibia Extender ................................. 6-47

10830 Well Leg Support (Siderail Mount).... 6-48

10836 Offset Adapter Mount ...................... 6-49

13100 / 13200 Montreal Lateral

Position Device....................................... 6-50

(*) Indicates that there has been a serial number break for the illustration

and that there are additional point page(s) following the original page.

© Schaerer Mayfield USA, Inc. 2004

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22111 Pin and Wire Holder ......................... 6-51

22119 Traction Bow Assembly ................... 6-52

22314 Traction Cuff Assembly ................... 6-53

70542 Bierhoff Leg Holder .......................... 6-54

70556 Siderail Extension Set ..................... 6-55

71070 Siderail Socket ................................ 6-56

71071 I.V. Arm Board Assembly ................ 6-57

71073 Siderail Clamp ................................. 6-58

71074 Conventional Ether Screen .............. 6-59

71075 Foot Rest......................................... 6-60

71077 Siderail Extender Set ....................... 6-61

71078 A/P Cassette Holder ........................ 6-62

71079 Lithotomy Leg Holder ....................... 6-63

71080 Universal Ether Screen .................... 6-64

71082 Lateral Cassette Holder ................... 6-65

71083 Cross Arm Support .......................... 6-66

71084 / 71085 / 71093 I.V. Arm Board

Cushion .................................................. 6-67

71088 Neuro Headrest Adapter................... 6-68

71090 Lateral Support Set.......................... 6-69

71092 Infant Arm & Hand Table ................. 6-70

71094 Table Side Extenders ...................... 6-71

71097 Tri Clamp 2 ...................................... 6-72

71098 Flexguard Stirrup Set ....................... 6-73

71099 Guardian Stirrup Set ........................ 6-74

71100 Leg Prep Stand................................ 6-75

71101 Snaplock Arm Board........................ 6-76

71102 / 71103 Snaplock Arm

Board Cushion ........................................ 6-77

71104 Shoulder Brace Set.......................... 6-78

71105 Universal Patient Brace /

71113 Circular Head Cushion ..................... 6-79

71106 / 71107 Uro Catch Bags................... 6-80

71108 Winged Anesthesia Screen.............. 6-81

71110 Footswitch ....................................... 6-82

71111 Split Leg Set - 71118 / 71119 Split

Leg Pad Set............................................ 6-83

71112 Foot Extension Assembly /

71114 Foot Extension Cushion................... 6-84

71116 Conductive Safety Strap /

20715 Nonconductive Safety Strap ............ 6-85

71120 Side Extender Shelf......................... 6-86

71125 Image Amplification Extension ....... 6-87

71129 X-Ray Arm Board............................. 6-88

71130 I.A. Board (36-inch).......................... 6-89

73001 Pelvic Base w/ Cushion ................... 6-90

73002 Leg Transfer Board w/ Cushion ........ 6-91

73003 Drain Pan......................................... 6-92

73004 I.A. Extention w/ Cushion (55-inch).. 6-93

73005 X-Ray Top Set................................. 6-94

73006 Back Section ................................... 6-95

73007 Ortho Pelvic Base /

73023 / 73024 Board w/ Cushion............ 6-96

73008 Abductor Bar ................................... 6-97

73009 Abductor Bar Clamp ........................ 6-98

73010 Traction Unit .................................... 6-99

73011 Traction Unit Extention .................. 6-100

73012 Popliteal Support ........................... 6-101

73013 Lateral Well Leg Holder .................. 6-102

73014 Shoulder Arthroscopic Attachment. 6-103
Shoulder Arthroscopic Lumbar

Support Assembly ................................ 6-104

Shoulder Arthroscopic Head Rest............. 6-105

73015 Articulating Bracket ....................... 6-106

73016 Drapery Kit .................................... 6-107

73019 Back Section X-Ray Top ............... 6-108

73020 Leg Transfer Frame ....................... 6-109

73021 Yellofin Leg Holder System.... Not Shown

73022 Clear Vision Drapes ............... Not Shown

10531 Bell Footpiece Traction Assy......... 6-110

73025 Orthopedic Cart ............................. 6-111

73026 General Surgery Cart ..................... 6-112

COMMENTS ............................................................ 7-1

(*) Indicates that there has been a serial number break for the illustration

and that there are additional point page(s) following the original page.

Page iiiPrinted in U.S.A.© Schaerer Mayfield USA, Inc. 2004

IMPORTANT INSTRUCTIONS

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General Safety Instructions

Safety First: The primary concern of
Schaerer Mayfield USA is that this surgery table is

maintained with the safety of the patient and staff in
mind. Toassure that services and repairs are completed
safely and correctly, proceed as follows:

(1 ) Read this entire manual before performing any

services or repairs on this surgery table.

(2 ) Be sure you understand the instructions con-

tained in this manual before attempting to
service or repair this surgery table.

Warnings

Throughout this manual are Note, Caution, and Danger
paragraphs that call attention to particular procedures.
These items are used as follows:

NOTE

A note is used to amplify an operating procedure,
practice or condition.

Warranty Instructions

Refer to the SMI “Limited Warranty” printed on the
back cover of the Installation and Operation Manual for
warranty information. Failure to follow the guidelines
listed below will void the warranty and / or render the
7300 Modular Surgery Table unsafe for operation.

• In the event of a malfunction, do not attempt to
operate the surgery table until necessary repairs have
been made.

• Do not attempt to disassemble surgery table, replace
malfunctioning or damaged components, or perform
adjustments unless you are one of SMI’s
authorized service technicians.

• Do not substitute parts of another manufacturer when
replacing inoperative or damaged components. Use
only SMI replacement parts.

CAUTION

A CAUTION is used for an operating

procedure, practice, or condition which, if
not correctly followed, could result in equipment
damage.

DANGER

A DANGER is used for an operating

procedure, practice, or condition
which, if not correctly followed, could result in
loss of life or serious personal injury.

© Schaerer Mayfield USA, Inc. 2004

Page ivPrinted in U.S.A.

SECTION I

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GENERAL INFORMATION

SECTION I

GENERAL INFORMATION

1.1 Scope of Manual

This manual contains detailed troubleshooting, sched­uled maintenance, maintenance, and service instruc­tions for 7300 Modular Surgery Table. This manual is
intended to be used by SMI’s authorized service
technicians.

1.2 How to Use Manual

A. Manual Use When Performing Scheduled Mainte-

nance.
(1) Perform inspections and services listed in

Scheduled Maintenance Chart (Refer to
para 3.1).

(2) If a component is discovered to be faulty or out

of adjustment, replace or adjust component in
accordance with maintenance/service instruc­tions (Refer to para 4.1).

B. Manual Use When Unit Is Malfunctioning And

Cause Is Unknown.
(1) Perform an operational test on unit (Refer to

para 2.1).

(2) Perform troubleshooting procedures listed in

Troubleshooting Guide (Refer to para 2.2).

(3) If a component is discovered to be faulty or out

of adjustment, replace or adjust component in
accordance with maintenance/service instruc­tions (Refer to para 4.1).

C. Manual Use When Damaged Component Is Known.

(1) Replace or adjust component in accordance

with maintenance/service instructions (Refer to
para 4.1).

1.3 Description Of 7300 Modular Surgery
Table

A. General Description (See Figure 1-1, Sheets 1

and 2).

The 7300 Modular Surgery Table is designed for use as
a general surgery table on which virtually any surgical
procedure can be accomplished. 7300 was designed
for maximum C-arm access and X-ray visibility.

Major serviceable components of the surgery table are:

1. Motor pump which includes two motors, two pump

units, two motor pump pressure relief valves, two
primary thermostats, two secondary thermostats, and a
motor pump output check valve, and a discharge filter,

2. Trendelenburg (UP and DOWN) solenoid valves,

Trendelenburg cylinder pilot operated check valves,
and Trendelenburg cylinder, trendelenburg position
sensor.

3. Seat (UP and DOWN) solenoid valves, seat cylinder

pilot operated check valves, seat cylinders and, seat
position sensor.

4. Lateral tilt (LEFT and RIGHT) solenoid valves,

lateral tilt cylinder pilot operated check valves, lateral tilt
cylinder, and lateral tilt position sensor.

5. Column (UP and DOWN) solenoid valves, column

cylinder pilot operated check valve, column cylinder,
and column assembly which includes slides.

6. Main and Outrigger Floor Lock solenoid valves,

three main floor lock cylinders, two outrigger floor lock
cylinders, outrigger pressure relief valve, main and
outrigger floor lock status switches.

7. Head section with two gas cylinders.

8. Main Controller Board which includes a 10 amp

fuse.

9. Charging / Power Driver Board which includes a 40

amp fuse.

10. RFI filter.

11. Transformer.

12. Four batteries.

13. Hand control which includes button board and

hand control board.

14. Foot control which includes foot switch pad and

foot control interface board.

15. Emergency override board.

16. Distribution board.

17. Plug Receptacle which includes two 5 amp fuses,

and line power pilot lamp.

© Schaerer Mayfield USA, Inc. 2004

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SECTION I

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GENERAL INFORMATION

Figure 1-1. Major Components (Sheet 1 of 2)

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SECTION I

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GENERAL INFORMATION

Figure 1-1. Major Components (Sheet 2 of 2)

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GENERAL INFORMATION

B. Theory of Operation. See Figures 5-1, Sheets 1

and 2, and Figure 5-2 for electrical schematic /
wiring diagram. See Figure 5-3 for hydraulic
schematic.

Electrical Theory Of Operation

When power cord is plugged into power cord recep­tacle, line voltage (approximately 115 VAC) is supplied
to table. Line voltage is applied across an RFI filter.
RFI filter reduces line conducted RFI / EMI that is
present on incoming power line. Across RFI filter
output is a line power pilot lamp which illuminates to
indicate power is present at output of RFI filter.
Transformer primary lines are also connected across
RFI filter output. Transformer steps line voltage down
to 32.5 VAC ± 2 VAC. The 32.5 VAC from output of
transformer is applied to charging / power driver board.
Charging / power driver board uses a DC rectifying
circuit to convert 32.5 VAC to approximately 27.8 VDC.
Charging / power driver board regulates charging rate
of four batteries by regulating rate at which 27.8 VDC is
applied to batteries. Charging / power driver board also
supplies 27.5 VDC to main controller board to power it.
Transformer has thermal fuses connected in each
primary winding and they are embedded between the
primary and secondary windings. If transformer over­heats, normally closed (N.C.) thermal fuses open,
disconnecting power to transformer.
Transformer is primarily used to supply power to
charging / power driver board, so board can charge
batteries and supply power to rest of table.
Charging / power driver board regulates charge rate
of batteries when batteries are being charged. This
means that a full load is not continuously being placed
on transformer, which is important because transformer
is not sized to draw a full current load continuously. If
batteries are low and a function is selected, power to
drive motor pump(s) is drawn from batteries first and
then from transformer as necessary. If batteries are too
low or a function is selected for too long, continuous
current draw thru transformer will overheat transformer
very quickly, causing thermal fuses to blow.

CAUTION

It is important that a table with a low bat­tery charge be operated only in case of

emergency and for a very short time period (less

than a minute).

Logic Theory Of Operation

When ENABLE button is pressed, a 5 VDC signal is
sent to main controller board, activating it. Main
controller board performs a self diagnostic check on
itself. If self diagnostic check fails, error code E11
(Internal RAM / Register Failure) is displayed on hand
control.
Main controller board and charging / power driver board
uses status circuits to check functionality of following
electrical components: motors, charging / power driver
board, valve spool solenoids, main controller board,
position sensors, foot control switch pad, and hand
control button board.
A status circuit, on charging / power driver board,
monitors amount of current draw thru motor pump
windings, when a function has been selected. If current
draw exceeds a predetermined value, main controller
board stops all functions and displays error code E02
(Overcurrent - Motor Pump #1) or E03 (Overcurrent ­Motor Pump #2), which indicates a failure of a motor
pump.
If current draw falls below a predetermined value, main
controller board stops all functions and displays error
code E04, which indicates failure of charging / power
driver board.
A status circuit, on main controller board, monitors
enable circuitry for each valve spool solenoid and
detects if a valve spool solenoid or enable circuitry of
main controller board is functioning correctly. If not,
main controller board stops all functions and displays
error code E05 (Valve Drive Failure), which indicates
failure of either a valve spool solenoid or main controller
board.
Another status circuit, on main controller board, moni­tors voltage input from position sensors. If voltage
value exceeds or falls below a predetermined range,
main controller board stops all functions and displays
appropriate error code: E07 (Trendelenburg Position
Sensor Failure), E08 (Tilt Position Sensor Failure), E09
(Seat Position Sensor Failure). An error code indicates
failure of either a position sensor, main controller board,
or wiring.
Main controller board also monitors main floor lock
status switch, outrigger floor lock status switch, motor
pump #1 primary thermostat, and motor pump # 2
primary thermostat. When hand control is ENABLED,
main controller board checks if normally open (N.C.)
main floor lock status switch and outrigger floor lock
status switch is untripped. If main controller does not
detect that
energizes main floor lock valve spool and motor pump,
causing main floor locks to extend. After eight seconds,
main controller de-energizes main floor lock valve spool

both

status switches are untripped, it

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GENERAL INFORMATION

and motor pump, and then energizes outrigger floor
lock valve spool and motor pump, causing outrigger
floor locks to extend. After six seconds, main controller
de-energizes outrigger floor lock valve spool and motor
pump. At this time main controller checks status of
status switches again. If main controller does not
detect that
all functions and displays E01 (Floor Lock Status
Switch Is Not Responding).
Also, when hand control is ENABLED, main controller
board checks if normally closed (N.C.) motor pump
primary thermostats are closed. If main controller
board detects an open circuit, it stops all functions and
displays error code E13 (Overheat - Motor Pump #1) or
E14 (Overheat - Motor Pump #2), which indicates that
motor pump has overheated, opening its primary
thermostat.
Also, when hand control is ENABLED, main controller
board checks status of each set of switches in hand
control; there are two normally open (N.O.) switches for
each function, one for solenoid valve and one for motor.
If only one of the set of two switches is detected as
being pressed, main controller board detects this and
displays error code E15 (Hand Control Switch Failure).
This indicates that one switch is stuck in closed posi­tion. Also, if a function button is pressed and then error
code E15 displays, this indicates that only one of two
switches is working properly. This safety feature
prevents unintended table movement due to a switch
malfunction.
Also, when a function is selected using foot control,
main controller board checks status of each set of
switches in the foot control pad; there are two normally
open (N.O.) switches for each function. If there is a set
of switches for which only one of two switches is
detected as being pressed, the main controller board
detects this and displays error code E06 (Foot Switch
Failure) on hand control. This indicates that one of two
switches is stuck in closed position or not working
properly. This safety feature prevents unintended table
movement due to a switch malfunction.
Motor pumps also have secondary thermostats which
provide backup protection if primary thermostats fail. If
a motor pump overheats and its primary thermostat
does not shut off motor pump, normally open (N.O.)
secondary thermostat closes, directly shorting current
past motor windings to ground, causing 40 amp fuse on
charging / power driver board to blow, which stops
motor pump.

both

status switches are untripped, it stops

Hydraulic System Theory Of Operation

When a function is selected using hand control or foot
control, motor pump(s) begins to run and selected
function's valve spool shifts.
Hydraulic oil flows thru a strainer in reservoir and into
pump chamber. Pump pumps oil thru an internal check
valve, and a discharge filter. Oil is now in supply line,
ready to power selected function's cylinder(s). Motor
pump internal check valve allows oil to flow thru to the
supply line, but closes when motor pump stops running,
preventing oil from back flowing into motor pump, which
prevents gravity drain out of supply line and back into
motor pump. Discharge filter removes any contami­nants from oil before oil reaches any hydraulic compo­nents. This prevents reduced life expectancy of
hydraulic components such as seals and o-rings and
prevents clogging of valves and check valves.
There is a 250 BAR (3625 PSI) pressure relief valve on
each motor pump. If pressure reaches or exceeds this
pressure, valve opens dumping oil back into reservoir.

Oil is now in supply line, ready to power selected
function's cylinder(s).

Trendelenburg and Lateral Tilt

If

Trendelenburg

control was selected (in normal table orientation), motor
pump is energized and valve spool for that function
moves to an up function position (oil will now flow in
new oil flow path that has been created; this path is
shown by straight flow symbols on hydraulic schematic)
and oil flows thru a check valve (A) and into the base of
cylinder, extending cylinder. Check valve (A) prevents
oil from escaping from cylinder after valve spool is de­energized, keeping cylinder from drifting. Oil also flows
thru a pilot line (represented by a dashed line on
hydraulic schematic) and extends a pilot piston. Pilot
piston forces open check valve (B) on retracting side of
cylinder, allowing oil to escape from top side of cylin­der, thru valve spool and into the oil return line.
If

Reverse Trendelenburg

hand control was selected (in normal table orientation),
motor pump is energized and valve spool for that
function moves to a down function position (oil will now
flow in new oil flow path that has been created; this path
is shown by crossed flow symbols on the hydraulic
schematic) and oil flows thru a check valve (B) and into
top of cylinder, retracting cylinder. Check valve (B)
prevents oil from escaping from cylinder after valve
spool is de-energized, keeping cylinder from drifting.
Oil also flows thru a pilot line (represented by a dashed
line on hydraulic schematic) and extends a pilot piston.

or

Lateral Tilt Left

or

button on hand

Lateral Tilt Right

button on

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GENERAL INFORMATION

Pilot piston forces open check valve (A) on base of
cylinder, allowing oil to flow from base of cylinder, thru
valve spool, and into oil return line.

Seat Functions

If

SEAT UP

normal table orientation), motor pump is energized and
valve spool for that function moves to an up function
position (oil will now flow in new oil flow path that has
been created; this path is shown by straight flow
symbols on hydraulic schematic) and oil flows thru a
check valve (A) and into base of left cylinder (master
cylinder), extending cylinder. Check valve (A) prevents
oil from escaping from cylinder after valve spool is de­energized, keeping cylinder from drifting. Oil also flows
thru two pilot lines (represented by dashed lines on
hydraulic schematic) and extends two pilot pistons (B
and D). One pilot piston forces open a check valve (B)
which allows oil to flow out of top side of left cylinder
thru another check valve (C) and into base of right
cylinder (slave cylinder), extending cylinder. Other pilot
piston forces open check valve (D) on top side of right
cylinder (slave cylinder), allowing oil to flow from top
side of cylinder, flow thru valve spool and into oil return
line.
If

SEAT DOWN

normal table orientation), motor pump is energized and
valve spool for that function moves to a down function
position (oil will now flow in new oil flow path that has
been created; this path is shown by crossed flow
symbols on hydraulic schematic) and oil flows thru a
check valve (D) and into top of right cylinder (slave
cylinder), retracting cylinder. Check valve (D) prevents
oil from escaping from right cylinder after valve spool is
de-energized, keeping cylinder from drifting. Oil also
flows thru two pilot lines (represented by dashed lines
on hydraulic schematic) and extends two pilot pistons.
One pilot piston forces open a check valve (C) which
allows oil to flow out of base of right cylinder thru
another check valve (B) and into top side of left cylinder
(master cylinder), retracting cylinder. Other pilot piston
forces open check valve (A) on base of left cylinder
(master cylinder), allowing oil to flow out of base of
cylinder, thru valve spool, and into oil return line.

Column Functions

If

TABLE UP

pump energizes and valve spool for that function moves
to an up function position (oil will now flow in new oil
flow path that has been created; this path is shown by
straight flow symbols on hydraulic schematic) and oil
flows thru a check valve (A) and into base of column

button on hand control is selected (in

button on hand control is selected (in

button on hand control is selected, motor

cylinder, extending cylinder. Check valve (A) prevents
oil from escaping from column cylinder after valve spool
is de-energized, keeping cylinder from drifting. Oil flows
out of top side of column cylinder as necessary, thru
valve spool, and into return line.
If

TABLE DOWN

motor pump energizes and valve spool for that function
moves to a down function position (oil will now flow in
new oil flow path that has been created; this path is
shown by crossed flow symbols on hydraulic sche­matic) and oil flows to top side of base cylinder, retract­ing cylinder. Oil also flows thru a pilot line (represented
by a dashed line on hydraulic schematic) and extends a
pilot piston. Pilot piston forces open check valve (A) on
base of cylinder, allowing oil to flow out of base of
cylinder, thru valve spool, and into oil return line.

Floor Lock Functions

If

ENABLE / LOCK

motor pump energizes and valve spool for main floor
lock cylinders moves to an up function position (oil will
now flow in new oil flow path that has been created; this
path is shown by straight flow symbols on hydraulic
schematic) and oil flows thru a check valve (A) and into
base of three main floor lock cylinders, extending
cylinders. Check valve (A) prevents oil from escaping
from three main floor lock cylinders after valve spool is
de-energized, keeping cylinders from drifting.
After approximately 10 seconds, main controller board
de-energizes motor pump and main floor lock spool and
then reenergizes motor pump and energizes outrigger
floor lock valve spool to an up function position (oil will
now flow in new oil flow path that has been created; this
path is shown by straight flow symbols on hydraulic
schematic) and oil flows thru two check valves (B and
C) and into the base of two outrigger floor lock cylin­ders, extending cylinders. As soon as pressure in
outrigger floor lock cylinders reaches 10 BARS (145
PSI), outrigger pressure relief valve opens, dumping oil
back to return line. Outrigger cylinders were designed
to add stability to table on an uneven floor.
Three main floor lock cylinders lift table off of casters;
then the two outrigger floor lock cylinders extend with
enough power to stabilize table
further.
Check valves (B and C) prevent oil from escaping from
two outrigger floor lock cylinders after valve spool is de­energized, keeping cylinders from drifting.
If

UNLOCK & ENABLE

selected for three seconds, motor pump energizes and
main floor lock valve spool moves to a down function
position (oil will now flow in new oil flow path that has
been created; this path is shown by crossed flow

button on hand control is selected,

button on hand control is selected,

without lifting

buttons on hand control is

table

Page 1-6Printed in U.S.A.© Schaerer Mayfield USA, Inc. 2004

SECTION I

Return To Table Of Contents

GENERAL INFORMATION

symbols on hydraulic schematic). Oil flows thru three
pilot lines (represented by dashed lines on hydraulic
schematic) and extends three pilot pistons, which
forces open three check valves; check valves A, B, and
C. With all three check valves open, oil flows out of
base of three main floor lock cylinders and two outrigger
floor lock cylinders, causing them to retract. There is a
strong spring in each floor lock cylinder which helps
retract cylinder.

Seat Slave Line Valve

On the seat functions, there is a manually operated two
way-valve (slave line valve) which is used to add or
remove oil from closed loop (slave line) to synchronize
stroke of left (master) and right (slave) cylinders.

Column Slave Line Valve

There is a manually operated two-way valve (slave line
valve) on column function, which is used to add or
remove oil from middle stage of column cylinder (if
there is too much oil in second stage, column cylinder
will "jump" downward and make a noise when column
down function is selected. If there is not enough oil in
second stage, full height potential of column cylinder
will not be reached).

Orifices

Orifices are internal to Trendelenburg, Lateral Tilt, and
Seat, cylinders to meter flow of oil into cylinders,
thereby regulating speed of cylinders.

1.4 SPECIFICATIONS

Factual data for the 7300 Modular Surgery Table is
provided in Table 1-1.

Table 1-1. Specifications

Description Data

Weight

Normal (w/ head & pelvic sections & upholstery) ...........

........................................................... 660 lb. (299 kg)

With Shipping Carton.......................... 764 lb. (347 kg)

Shipping Carton........ 58 in. "L" x 30 in. "W" x 40 in. "H"

(147 cm x 76 cm x 102 cm)

Dimensions: (w/ Head, Back, Pelvic & Leg Transfer
Board.)

Table Top Length ............................. 75.6 in. (192 cm)

Table Top Width ...................................... 20.5 (52 cm)

Overall Width......................................... 24 in. (61 cm)

Overall Length..................................... 78 in. (198 cm)

Table Positioning:

Table Top Height (Adjustable) .......... 27.7 (± 0.2) in. to

43.9 (± 0.2) in.

(70 to 112 cm)

Trendelenburg ......................................0° to 28° (±1°)

Reverse Trendelenburg....................... 0° to -28° (±1°)

Lateral Tilt................ 0° to -18° (±1°) in either direction

Seat Section .......... + 75° (±1°) to -40° (±1°) in relation

to back section

Coordinating Flex (Normal Position):

Trendelenburg ................+20° (±5°) above horizontal

Seat Section ......-40° (±5°) in relation to back section

Coordinating Reflex (Normal Position):

Trendelenburg ................. -28° (±5°) below horizontal

Seat Section ..... +60° (±5°) in relation to back section

Head Section:

Mounted on Head End...........+30° (±3°) to -30° (±3°)

Mounted on Foot End ............+30° (±3°) to -75° (±5°)

Page 1-7Printed in U.S.A.© Schaerer Mayfield USA, Inc. 2004

SECTION I

MODEL

NUMBER

SERIAL

NUMBER

SMI

7100-001

115 VAC

2 AMP 60 HZ
TDWXXXXX

MODEL

INPUT

RATING

SERIAL NO.

Return To Table Of Contents

GENERAL INFORMATION

Table Speed (Table in normal orientation, full battery

charge, ambient oil temp.):

Extend Column Fully .................. 16.0 to 21.0 seconds

Retract Column Fully.................. 16.0 to 21.0 seconds

Reverse Trend. to Trend. ........... 20.5 to 24.5 seconds

Trend. to Reverse Trend. ........... 16.0 to 20.0 seconds

Lat. Tilt R to Lat. Tilt L .................. 9.5 to 12.5 seconds

Lat. Tilt L to Lat. Tilt R ................ 10.0 to 13.0 seconds

Seat Down to Seat Up ................ 18.0 to 21.0 seconds

Seat Up to Seat Down ................ 18.5 to 21.5 seconds

Weight Capacity (maximum):

Normal Table Orientation ..................500 lbs. (227 kg)

Reverse Table Orientation..............400 lbs. (181.4 kg)

Head Section.........................................40 lbs. (18 kg)

Overweight Operation ................ Patient Positioning is

restricted. To learn of limita-

tions, contact the Surgical

Table Product Manager at

1-800-643-6275

Hydraulic System Oil ................ ISO Viscosity Grade 32

Premium Hydraulic Fluid

Reservoir Capacity ..................... 2.1 Quarts (2.0 Liters)

(2) Refer to the Parts List to determine the item

numbers of the parts, part numbers of the
parts, descriptions of the parts, and quantities
of parts needed and record this data (Refer to
para 6.1).

NOTE

Ask the Purchasing Department of the company that
owns the unit for this information. Otherwise, this
information may be obtained from the dealer that
sold the unit.

(3) Determine the installation date of the unit and

record this data.

Serial Number when contacting SMI

(4)Call SMI with recorded information and ask

for Technical Services Department. Use phone
number 1-800 643-6275

Please have the Model and

System Capacity ........................ 3.7 Quarts (3.5 Liters)

Battery Charging Time.............................. 8 to 12 hours

Motor Pump Pressure

Relief Valve ...............Opens At 250 BARS (3625 PSI)

Outrigger Pressure

Relief Valve ...................Opens At 10 BARS (145 PSI)

Electrical Requirements:

115 VAC Unit........................... 110 - 120 VAC, 60 HZ,

2 amp, single phase

Battery Power Output............ 24 VDC, 18 amp-hours

1.5 Parts Replacement Ordering

If a part replacement is required, order the part directly
from the factory as follows:

(1) Refer to Figure 1-2 to determine the location of

the model number and serial number of the unit
and record this data.

SMI

7100

CA7681

Figure 1-2. Model Number / Serial

Number Location

© Schaerer Mayfield USA, Inc. 2004

Page 1-8Printed in U.S.A.

1.6 Special Tools

Return To Table Of Contents

Table 1-2 lists all of the special tools needed to repair
the unit, how to obtain the special tools, and the pur­pose of each special tool.

Table 1-2 is on the following page.

Table 1-2. Special Tools List

SECTION I

GENERAL INFORMATION

Description of Special Tool

Multimeter Commercially Available Any Type Used to perform continuity and voltage checks.
Pin Extractor (has

interchangable bits - M3x0.5,
M4x0.7, M5x0.8, M6x1.0,
1/4-20, 10-24, and 5/16-18)

Spanner Wrench - locking nut Schaerer Mayfield USA

Spanner Wrench - brass pivot
puck

Retaining Bolt Schaerer Mayfield USA

Spanner Wrench - retainer cap Schaerer Mayfield USA

Pressure Relief Valve Test
Harness

Blanking Plug Kit Schaerer Mayfield USA

Soldering Iron Commercially Available Any Type Used to connect wires to terminals with solder.
60 / 40 Solder Commercially Available Any Type Type of solder which should be used when

Internal retaining ring pliers Commercially Available Any Type Used to remove snap rings which secure bearings

Torque Wrench Commercially Available Any Type Used to tighten hardware to specified torque

Transport Tool Schaerer Mayfield USA

Tipping Tool Schaerer Mayfield USA

Manufacturer's

Name / Address / Phone

Schaerer Mayfield USA
4900 Charlemar
Drive Cincinnati, Ohio 45227
[phone]

4900 Charlemar
Drive Cincinnati, Ohio 45227
[phone]

Schaerer Mayfield USA
4900 Charlemar
Drive Cincinnati, Ohio 45227
[phone]

4900 Charlemar
Drive Cincinnati, Ohio 45227
[phone]

4900 Charlemar
Drive Cincinnati, Ohio 45227
[phone]

Schaerer Mayfield USA
4900 Charlemar
Drive Cincinnati, Ohio 45227
[phone]

4900 Charlemar
Drive Cincinnati, Ohio 45227
[phone]

4900 Charlemar
Drive Cincinnati, Ohio 45227
[phone]

4900 Charlemar
Drive Cincinnati, Ohio 45227
[phone]

Manufacturer's

Part Number

M05390 Used to pull pins which secure cylinders, handles,

etc. in place. Can also be used to remove caster
fork.

M07235 Used to remove locking nut which secures top of

column cylinder in column.

M07236 Used to remove brass pivot puck which secures

top of column cylinder in column.

M07407 Used to hold rod of column cylinder stationary,

while special tools, M07235 and M07236 are
used.

M07161 Used to remove retainer cap which secures

latching mechansim in place.

M07443 Used to adjust crack settings of motor pump

pressure relief valves and outrigger pressure relief
valve.

502-0176-00 Used to cap the end of hydraulic lines to allow

pressure checks to be made.

soldering wires on surgery table.

in base of cylinders.

values.

502-0169-00 A dolly type tool which is used to transport Model

7100 or 7300 surgical tables around.

502-0168-00 Used to tip over Model 7100 or 7300 surgical

tables to access base of table for servicing.

Purpose of Special Tool

© Schaerer Mayfield USA, Inc. 2004

Page 1-9Printed in U.S.A.

SECTION I

Return To Table Of Contents

GENERAL INFORMATION

© Schaerer Mayfield USA, Inc. 2004

Page 1-10Printed in U.S.A.

TESTING AND TROUBLESHOOTING

Return To Table Of Contents

SECTION II

TESTING AND TROUBLESHOO TING

SECTION II

2.1 Operational Test

In order to effectively diagnose malfunctions of the 7300
Modular Surgical Table, it may be necessary to perform
an operational test as follows:

DANGER

Refer to the Operator Manual for

complete instructions on operating the
surgical table. Failure to do so could result in
personal injury.
Power must be supplied to the unit to measure
the voltage at the Test Points. Do not touch any
bare wires or terminals while making these
voltage checks. Failure to do so may result in
electrical shock which could result in serious
personal injury or death.

NOTE

The Operational Test, for the most part, only de­scribes what should happen when the surgical table is
operated. If the surgical table does something other
than described, a problem has been discovered.
Refer to the Troubleshooting Guide to determine the
cause of the problem and its correction.

(1 ) Plug power cord into table's plug receptacle.

See Figure 2-1, Sheets 1 and 2.

(8 ) Move the surgery table around.
(9) Observe. The casters should swivel freely and

the table should roll easily on the casters. The

table should not wobble.
(10) Press ENABLE button on hand control.
(11) Observe. The motor pump should run and the

main floor lock cylinders should extend. After

eight seconds, the motor pump should stop

running. Then the motor pump should begin

running again and the outrigger floor lock

cylinders should extend. After six seconds, the

motor pump should stop running. The hand

control display should read LOCKING FLOOR

while the floor lock cylinders are extending.
(12) Insert pins of Head Section into sockets on

column end of table. Rotate latch handles to

locked position (to move latch handles to locked

position, rotate them away from you) and then

pull and push on head sections.
(13) Observe. When the latch handles are rotated to

the locked position, the section being installed

should now be held securely in place. No side-

to-side or in-and-out movement should be

possible.

(2) Observe. The line power pilot lamp should

illuminate.
(3 ) Unplug the power cord.
(4 ) Press ENABLE button on hand control.
(5) Observe. The hand control display should

illuminate and display the current table position

and battery charge level (XX POSITION and

BATT LEVEL XX. After 10 seconds, the hand

control display should extinguish.
(6 ) Press and hold UNLOCK & ENABLE buttons on

hand control for three seconds.
(7) Observe. The motor pump should run and the

table should lower (floor lock cylinders should

retract) until table is on its casters. The hand

control display should read UNLOCKING

FLOOR and then ON WHEELS.

© Schaerer Mayfield USA, Inc. 2004

(14) Press the ENABLE and REVERSE POSITION

buttons on hand control.

(15) Observe. The hand control display should read

REVERSE POSITION.

(16) Press the FLEX button and then REFLEX

button.

(17) Observe. Hand control display should indicate

these positions are "disabled" and cannot be
used when table is in REVERSE POSITION.

(18) Press the ENABLE and NORMAL POSITION

buttons on hand control.

(19) Observe. The hand control display should read

NORMAL POSITION.

Page 2-1 Printed in U.S.A.

SECTION II

Return To Table Of Contents

TESTING AND TROUBLESHOOTING

C

LINE POWER

PILOT LAMP

HEAD

SECTION

HAND

CONTROL

LATCH

HANDLE

EMERGENCY

OVERRIDE

PANEL

FOOT

CONTROL

RELEASE

HANDLE

ENABLE
LOCK

LEVEL

SMI

7300

SMI

PLUG

B

DISABLE

UNLOCK

7100

SMI

7300

BACK

SECTION

RECEPTACLE

A

SEAT SECTION
(PELVIC BASE)

POWER

CORD

TRENDEL-

ENBURG

REVERSE

TRENDEL-

ENBURG

TABLE

UP

TABLE
DOWN

FLOOR

LOCK

CYLINDERS

LATERAL

TILT

LEFT

LATERAL

TILT

RIGHT

Figure 2-1. Operational Test (Sheet 1 of 2)

LOCKED

POSITION

AUTO
CAPTURE
POSITION

UNLOCKED

POSITION

LATCH HANDLE

POSITIONS

(TYP. 2 PLACES)

CA819700

© Schaerer Mayfield USA, Inc. 2004

Page 2-2Printed in U.S.A.

SECTION II

Return To Table Of Contents

TESTING AND TROUBLESHOOTING

BUTTONS

SMI

DISABLE

LATERAL

TILT LEFT

SYSTEM

OVERRIDE

SYSTEM

OVERRIDE

7300

DISABLE

TABLE
DOWN

TABLE

UP

TRENDELENBURG

REVERSE

TRENDELENBURG

UNLOCKLOCK

SEAT

UP

SEAT

DOWN

HAND

CONTROL

DISPLAY

ENABLE

NORMAL

POSITION

TRENDELENBURG

TABLE

UP

LATERAL

TILT LEFT

SEAT

UP

FLEX

ENABLE

LOCK

DISABLE

NORMAL

REVERSE

POSITION

TREND

POSITION

REV TREND

HEIGHT UP

HEIGHT DOWN

TILT L

TILT R

SEAT UP SEAT DOWN

FLEX

UNLOCKLEVEL

SMI

LEVEL

(RETURN TO)

DISABLE

REVERSE
POSITION

REVERSE

TRENDELENBURG

TABLE
DOWN

LATERAL

REFLEX

TILT RIGHT

SEAT

DOWN

7300

REFLEX

UNLOCK

LATERAL

TILT RIGHT

LEVEL

UNLOCK

(RETURN TO)

Figure 2-1. Operational Test (Sheet 2 of 2)

(20) Press the ENABLE button and then press the

TABLE UP, TABLE DOWN,
TRENDELENBURG, REVERSE
TRENDELENBURG, LATERAL TILT LEFT,
LATERAL TILT RIGHT, SEAT UP, SEAT
DOWN, FLEX, and REFLEX buttons, running
each function thru its full range of motion, and
checking its speed and range of motion perfor­mance.

(21) Observe. The table performance should meet

the following specifications:

Range Of Motion:

Table Top Height (Adjustable) ........... 27.7 (± 0.2) in. to

43.9 (± 0.2) in.
(70 to 112 cm)

Trendelenburg ....................................... 0° to 28° (±1°)

Reverse Trendelenburg ......................... 0° to -28° (±1°)

Lateral Tilt................. 0° to -18° (±1°) in either direction

CA819800

Seat Section ........... + 25° (±1°) to -40° (±1°) in relation

to back section

Coordinating Flex (Normal Position):

Trendelenburg .................. +20° (±5°) above horizontal

Coordinating Reflex (Normal Position):

Trendelenburg ................... -12° (±5°) below horizontal

Table Speed (Table in normal orientation, full battery

charge, ambient oil temp.):

Extend Column Fully................... 16.0 to 21.0 seconds

Retract Column Fully .................. 16.0 to 21.0 seconds

Reverse Trend. to Trend. ............ 20.5 to 24.5 seconds

Trend. to Reverse Trend. ............ 16.0 to 20.0 seconds

Lat. Tilt R to Lat. Tilt L .................. 9.5 to 12.5 seconds

Lat. Tilt L to Lat. Tilt R ................ 10.0 to 13.0 seconds

Seat Down to Seat Up ................ 18.0 to 21.0 seconds

Seat Up to Seat Down ................ 18.5 to 21.5 seconds

© Schaerer Mayfield USA, Inc. 2004

Page 2-3Printed in U.S.A.

SECTION II

Return To Table Of Contents

TESTING AND TROUBLESHOOTING

(22) Press the ENABLE button and then press the

LEVEL button until the table reaches its level
position. Using a protractor, check the table top
to ensure it is level within ±2°.

(23) Observe. The table top should move to a level

position within ±2° as follows: The lateral tilt
function should level out first; then a sequence
of the Seat, and Trendelenburg functions should
move, with each function moving no more than
10° at a time.

(24) Squeeze the release handle on the head section

and move the head section thru its full range of
motion.

(25) The head section should move smoothly and

should not take excessive force. The head
section should meet the following range of
motion specifications:

Head Section:

Mounted on Head End ........... +30° (±3°) to -30° (±3°)

Mounted on Foot End ............ +30° (±3°) to -75° (±5°)

(26) Move head section to level position and then

place approximately 40 lbs. (18 kgs) at Point C
(head section). Observe head section for two to

three minutes.
(27) Observe. The head section should not drift.
(28) Place approximately 400 lbs. (181.4 kg) of

weight on table top as follows: 28 lbs. (12.7 kg)

at Point C (head section), 152 lbs. (69 kg) at

Point B (back section), and 168 lbs. (76.2 kg) at

Point A (seat section).

(33) Observe. Each function should move as

depicted by the illustration on its button.

(34) Press each function button on the foot control.

Then place the table top in REVERSE position.
Then press each function button on the foot
control again.

(35) Each function should move as depicted when

table top is in NORMAL position. The table
should not operate, using the foot control, when
the table top is in REVERSE position.

(36) Plug power cord into table's power receptacle.

DANGER

Electrical power must be connected to

perform the following steps. Do not
touch any bare wires or terminals. Failure to do
so could cause an electrical shock which could
result in serious personal injury or death.

(37) See Figure 2-2 for this step. Check for 32.5

VAC ± 2 VAC across Test Points C and D and
across Test Points D and E.

(38) Observe. There should be 32.5 VAC ±2 VAC

across

(39) See Figure 2-2 for this step. Check for 27.7

VAC ± 2 VAC across Test Points F and G and
across Test Points H and J. Check for 27.8
VAC ±2 VAC across Test Points K and L.

(40) Observe. The proper voltages should be

present across

both

sets of test points.

each

set of test points.

(29) Press ENABLE button and then press TABLE

UP and TABLE DOWN buttons to run column
function up and down several times.

(30) Observe. Column function should move up and

down steadily and smoothly. No binding
condition should be evident, especially when
column is lowering. There should be no exces-

sive side-to-side play in column assembly.
(31) Remove weight from table top.
(32) Press and hold the SYSTEM OVERRIDE button

while pressing the function buttons, one at a

time, on the emergency override panel.

© Schaerer Mayfield USA, Inc. 2004

Page 2-4Printed in U.S.A.

SECTION II

Return To Table Of Contents

TESTING AND TROUBLESHOOTING

POWER CORD
RECEPTACLE

5 amp.
FUSE

L

115

N

VAC

5 amp.
FUSE

Note

Wire colors may change
without notification

ST5b

3

1

11

9

15

5

7
8

6

10

2

12

141316

4

RED

RED

RED

RED

RED

BLACK

BLACK

BROWN

BLUE

BLACK

BLACK

BLACK

BLACK

WHITE

VIOLET

GREEN

YELLOW

ORANGE

RED

4

5

FOOT

CONTROL

6

PORT

1

NOTE: FOOT AND HAND CONTROL

PLUGS ARE POSITIONED TO VIEW

TERMINAL (BACK) END.

5

6

HAND

CONTROL

7

PORT

1

2

GREEN

3

2

4

3

= DENOTES "TEST POINTS"

!!

LINE POWER
PILOT LAMP

A

BROWN

BROWN

RFI

FILTER

BLUE

YELLOW / GREEN

YELLOW / GREEN

ST6

12

GREY / PINK

GREY / WHITE

BROWN / GREY

WHITE / GREEN

BROWN / GREEN

YELLOW / WHITE

BROWN / YELLOW

BLUE

GREEN

YELLOW

RED

BROWN

GREY

GREY
BLUE

GREEN

WHITE

YELLOW

RED

BROWN

9111413161518172019
10

RED / BLUE

B

7

8

WHITE

BLUE

YELLOW / GREEN

3

5
6

4

GREY

VIOLET

WHITE
YELLOW

1
2

BLUE

M

N.C.

80° c

(176° F)

FUSE

OUTRIGGER

FLOOR LOCK

STATUS SWITCH

BLACK

2

WHITE

GREY

WHITE

N

100° c

MOTOR

(212° F)

PUMP

SECONDARY

L2

#2

THERMAL

RED

1

BROWN

N.O.

N.O.

N.C.C.

(SWITCHES
SHOWN IN
UNTRIPPED
POSITION)

BROWN

FUSE

MAIN FLOOR

LOCK STATUS

SWITCH

BLACK

2

WHITE

Q

RED

1

BROWN

N.C.

P2

80° c

(176° F)

L1

PRIMARY

THERMAL

FUSE

N.O.

N.C.C.

4

BROWN

X

ST3

W

8

6

10

12

7

9 11

PINK

WHITE

GREEN

YELLOW

RED / BLUE

GREY / PINK

RED

R

2
1 3 5

BLUE

GREY

VIOLET

BLACK

P

ST10

8

10 12 14

6

4

2

7

1 3 5

13

9

11

RED

PINK

BLUE

BLACK

BROWN

VIOLET

GREEN

YELLOW

RED / BLUE

GREY / PINK

WHITE / GREEN

BROWN / GREEN

RED

PINK

BLUE

GREY

RED / BLUE

BLACK

GREEN

VIOLET

BROWN

YELLOW

GREY / PINK

3

911

5

7

1

2

12

10

6

8

4

St23

WHITE

K

ST3a

ST2a

TRANSFORMER

THERMAL

FUSE

BLACK

RED

THERMAL

FUSE

YELLOW

BLACK

RED

2

2

ST1

ST1

3

3

4

4

ST8
(P2)

1

1

CHARGING / POWER

ST8

BLACK

RED

BLACK

C5

ST3a

(BATT. -)

C
D
E

9
10

V

DRIVER BOARD

T

9
10

RED

YELLOW

BLUE

BLACK

BROWN

2
1 3 5

7
8

7
8

WHITE

VIOLET

4

S

ST5a

ST5a

ST2a

(BATT. +)

5
6

5
6

GREY

GREY

6

3
4

3
4

VIOLET

WHITE

8
7

ST2b

2

3

1

9111413161518172019

5

7

1 3 5

8

6

10

2

4

MAIN CONTROLLER BOARD

1

2

3

WHITE

GREEN

BROWN

2
4

2

1
3

4

St35

BLACK

GREEN

BROWN

YELLOW

GREEN

BROWN

YELLOW

H

10 amp.

FUSE

1

1

St1

2 2

RED

PINK

BROWN

YELLOW

RED

RED

2

1
3

4

BLUE

St37

5

6

7

8

GREY

RED

2

1
3

4

BLUE

St36

5

6

WHITE

7

8

GREY

J

SEAT POSITION

YELLOW

SENSOR

16
14 13

12
10
8
6
4
2

RED

12

ST6

St1

St4

15

11
9
7

St5b

5
3
1

LATERAL TILT

POSITION SENSOR

GREEN

2

1

1

3

3

4

5

6

St33

St32

U

ST7a

4

(PUMPS +)

1
2

1
2

BLUE

RED

10
9

6

ST2b

ST9 a & b

ST7
(P1)

BLACK

YELLOW

8
7

WHITE

FUSE

40 amp.

ST4

2
1

BLACK

BROWN

10
9

GREEN

BROWN

L

- +- +- +-

+

BATTERY BATTERY BATTERY BATTERY

ST9a

RED

ST9b

RED

F

2
1

G

RED

GREY

WHITE

BLACK

BROWN

8

6

4

2

7

1 3 5

ST7

8

6

4

2

7

1 3 5

ST7

TRENDELENBURG
POSITION SENSOR

2

3

100° c

MOTOR

(212° F)

PUMP

SECONDARY

L2

#1

THERMAL

N.O.

ST4

FUSE

PI

L1

PRIMARY
THERMAL

WHITE

BLACK

BLACK

GREEN

10

9

10

9

YELLOW

8

10

6

4

2

12

7

9 11

1 3 5

ST3

ON ON

12

8

10 12 14

6

4

2

7

1 3 5

13

9

11

ST10

1

Figure 2-2. Voltage Checks

© Schaerer Mayfield USA, Inc. 2004

CA819900

Page 2-5Printed in U.S.A.

SECTION II

Return To Table Of Contents

TESTING AND TROUBLESHOOTING

2.2 Troubleshooting Procedures

Table 2-1 is a Troubleshooting Guide which is used to
determine the cause of the malfunction.

Table 2-1. Troubleshooting Guide

Problem Symptom Probable Cause Check Correction

Table seems powerless
even when plugged into a
wall outlet.

Line Power Pilot Lamp
does not illuminate (with
power cord plugged in).

Line Power Pilot Lamp
illuminates, but batteries
do not recharge and table
is powerless (with power
cord plugged in).

Line Power Pilot Lamp
illuminates, but table is
powerless.

Facility circuit breaker
providing power to table is
tripped.

One of two 5 amp fuses in
the power cord receptacle is
blown.

RFI filter is blown. See Figure 5-1 for this

Line power pilot lamp is
burned out.

Wires or wire connections
between power cord
receptacle and transformer
are broken, loose or dirty.

Thermal fuse(s) in
transformer are blown.

Transformer is blown. See Figure 5-1 for this

Charging / power driver
board is malfunctioning.

Wires or wire connections
between transformer and
charging / power driver
board are broken, loose, or
dirty.

10 amp fuse on main
controller board is blown.

Check to see if facility
circuit breaker is tripped.

Remove both 5 amp
fuses from power cord
receptacle and perform a
continuity check on the
fuses.

check. Check for 115
VAC ± 5.0 VAC across
Test Points A and B.

Replace suspect line
power pilot lamp with
known working line
power pilot lamp.

Perform a continuity
check on all suspect
wires or connections.

See Figure 5-1 for this
check. Check for 32.5 ±

2.0 VAC across Test
Points C and D and
across Test Points D
and E.

check. Check for 32.5 ±

2.0 VAC across Test
Points C and D and
across Test Points D
and E.

See Figure 5-1 for this
check. Check for 27.7
+/- 0.3 VDC across Test
Points F and G. Check
for 27.7 +/- 0.3 VDC
across Test Points H and
J. Check for 27.8 +/- 0.3
VDC across Test Points
K and L.

Perform a continuity
check on all suspect
wires or connections.

Perform continuity check
on 10 amp fuse.

If circuit breaker is tripped,
determine what caused the
circuit breaker to trip, correct
the problem, and then reset /
replace circuit breaker.

Replace any blown 5 amp
fuses.

If 115 VAC ± 5.0 VAC is not
present across Test Points A
and B, replace RFI filter.
Refer to para 4.35.

Replace line power pilot lamp.
Refer to para 4.37.

Clean any dirty connections.
Tighten any loose
connections. Replace any
broken connectors or wires.

If 32.5 VAC ± 2.0 VAC is not
present across one or both of
the Test Point groups, replace
the transformer. Refer to
para 4.36.

If 32.5 VAC ± 2.0 VAC is not
present across one or both of
the Test Point groups, replace
the transformer. Refer to
para 4.36.

If proper voltage is not
present at Test Points,
replace charging / power
driver board. Refer to para

4.38.

Clean any dirty connections.
Tighten any loose
connections. Replace any
broken connectors or wires.

Replace 10 amp fuse. See
Figure 5-1 for fuse location.

© Schaerer Mayfield USA, Inc. 2004

Page 2-6Printed in U.S.A.

Problem Symptom Probable Cause Check Correction

Return To Table Of Contents

Table operates when
power cord is plugged in,
but will not operate when
power cord is unplugged.

Table 2-1. Troubleshooting Guide

When ENABLE button on
hand control is pressed, its
display does not illuminate
(with power cord
unplugged).

TESTING AND TROUBLESHOOTING

40 amp fuse on charging /
power driver board is blown.

10 amp fuse on main
controller board is blown.

Batteries are dead and are
not supplying charging /
power driver board with
enough power to operate.

See Figure 5-1 for this
check. Check fuse
visually or perform
continuity check on fuse
(may need to check
secondary thermal fuse
of motor pump. If blown,
thermal fuse will cause
40 amp fuse to blow).

Perform continuity check
on 10 amp fuse.

See Figure 5-1 for this
check. Check individual
batteries by checking for

13.2 +/- 0.4 VDC across
terminals of each battery
(Test Points M and N).

SECTION II

Replace 40 amp fuse. See
Figure 5-1 for fuse location.

Replace 10 amp fuse. See
Figure 5-1 for fuse location.

If 13.2 +/- 0.4 VDC is not
present across Test Points,
replace batteries. Refer to
para 4.39.

Batteries do not recharge
in 6 to 8 hours from low
charge.

Hand control does not
work.

Batteries do not recharge
very quickly.

When ENABLE button on
hand control is pressed, its
display does not illuminate.

Charging / power driver
board is malfunctioning.

One of thermal fuses in
transformer is blown.

Batteries are dead. See Figure 5-1 for this

10 amp fuse on main
controller board is blown.

Main controller board or
hand control board is
malfunctioning.

Wires or wire connections
between main controller
board, distribution board,
and hand control port are
broken, loose or dirty.

Motor pump secondary
thermostat is closed creating
a direct short to ground,
causing 40 amp fuse on
charging / power driver
board to blow.

See Figure 5-1 for this
check. Check for 27.7
+/- 0.3 VDC across Test
Points F and G.

See Figure 5-1 for this
check. Check for 32.5
+/- 2.0 VAC across Test
Points C and D, and
across Test Points D
and E.

check. Check individual
batteries by checking for

13.2 +/- 0.4 VDC across
terminals of each battery
(Test Points M and N).

Perform continuity check
on 10 amp fuse.

See Figure 5-1 for this
check. Check for 5.0
VDC across Test Points
P and Q. If 5 VDC is
present, check for 5.0
VDC across Test Points
Q and R within 10
seconds of pressing
ENABLE button on hand
control.

See Figure 5-1 for this
check. Perform a
continuity check on all
suspect wires or
connections.

See Figure 5-1 for this
check. Check for a
resistance value of 0
ohms between Test
Points S and T for motor
# 1 or Test Points U and
V for motor # 2.

If proper voltage is not
present at Test Points,
replace charging / power
driver board. Refer to
para 4.32.

If 32.5 +/- 2.0 VAC is not
present across one or both of
the Test Point groups, replace
the transformer. Refer to
para 4.36.

If 13.2 +/- 0.4 VDC is not
present across Test Points,
replace batteries. Refer to
para 4.39.

Replace 10 amp fuse. See
Figure 5-1 for fuse location.

If 5.0 VDC is not present
across Test Points P and Q,
the main controller board is
malfunctioning. If 5.0 VDC is
not present across Test Points
Q and R during check, then
main controller board or hand
control board is
malfunctioning. Refer to para

4.31 or 4.5.
Clean any dirty connections.

Tighten any loose
connections. Replace any
broken connectors or wires.

Replace malfunctioning motor,
secondary thermostat, and 40
amp fuse. Refer to para 4.26
and 4.41.

© Schaerer Mayfield USA, Inc. 2004

Page 2-7Printed in U.S.A.

SECTION II

Return To Table Of Contents

TESTING AND TROUBLESHOOTING

Table 2-1. Troubleshooting Guide

Problem Symptom Probable Cause Check Correction

Hand control does not
work - Continued.

When ENABLE button on
hand control is pressed, its
display does not illuminate

- Continued.

Display of hand control
board is malfunctioning.

Replace suspect hand
control board with known
working hand control
board.

Replace hand control board.
Refer to para 4.5.

Foot control does not
work.

When a button on hand
control is pressed, error
code E15 displays.

When a function button on
hand control is pressed,
the motor pump does not
run and no error codes
display.

Foot control operates fine
sometimes, but not every
time.

When foot switch on foot
control is pressed, nothing
happens (hand control
display should illuminate
when foot switch is
depressed).

Button board is
malfunctioning.

Button board is
malfunctioning. One of two
button switches for a
function is stuck in closed
position or will not close.

Hand control board is
malfunctioning.

Button board is
malfunctioning.

Main controller board is
malfunctioning.

Wires or wire connections
between main controller
board, distribution board,
and hand control port are
broken, loose or dirty.

Table is in reverse
orientation.

The hand control or
emergency override panel is
being used (hand control
and / or emergency override
panel takes priority over foot
control).

One of two foot switches for
a function is stuck in closed
position or will not close.

Replace suspect button
board with known
working button board.

Perform a continuity
check on both button
switches of suspect
function (when a button
switch is pressed, there
should be continuity
between its two
terminals).

Replace suspect hand
control board with known
working hand control
board.

Replace suspect button
board with known
working button board.

Replace suspect main
controller board with
known working main
controller board.

See Figure 5-1 for this
check. Perform a
continuity check on all
suspect wires or
connections.

Foot control is locked out
from being used when
table top is in reverse
orientation - foot control
may only be used when
table top is in normal
orientation.

Check if problem occurrs
only when hand control
or emergency override
panel is being used.

See Figure 5-1 for this
check. Perform a
continuity check on both
foot switches of suspect
function (when foot
switch is pressed, there
should be continuity
between its two
terminals).

Replace button board. Refer
to para 4.4.

If check fails, replace button
board. Refer to para 4.4.

Replace hand control board.
Refer to para 4.5.

Replace button board. Refer
to para 4.4.

Replace main controller
board. Refer to para 4.31.

Clean any dirty connections.
Tighten any loose
connections. Replace any
broken connectors or wires.

Use hand control or set up
table top in normal orientation.
Inform operator that Foot
Control cannot be used when
table is in reverse orientation.

Do not use foot control
simultaneously with hand
control or emergency override
panel. Inform operator of
Emergency Override Panel,
Hand Control, and Foot
Control priorities.

If check fails, replace foot
switch pad.

© Schaerer Mayfield USA, Inc. 2004

Page 2-8Printed in U.S.A.

Problem Symptom Probable Cause Check Correction

Return To Table Of Contents

Foot control does not work

-Continued

Error code E01 (Floor
Lock Status Switch Is Not
Responding) displays on
hand control.

Table 2-1. Troubleshooting Guide

When foot switch on foot
control is pressed, nothing
happens (hand control
display should illuminate
when foot switch is
depressed) -Continued.

Floor lock cylinders do not
extend or retract properly
and error code E01
appears on hand control.

Floor lock cylinders extend
properly, but error code
E01 appears on hand
control.

TESTING AND TROUBLESHOOTING

Foot control interface board
is malfunctioning.

10 amp fuse on main
controller board is blown.

Main controller board or foot
control interface board is
malfunctioning.

Wires or wire connections
between main controller
board, distribution board,
and hand control port are
broken, loose or dirty.

Check valve(s) for main floor
lock cylinder(s) or outrigger
floor lock cylinder(s) are
stuck open, allowing floor
lock cylinders to retract after
extending.

Foreign matter in main floor
lock or outrigger floor lock
valve spool.

Outrigger pressure relief
valve is malfunctioning,
preventing outrigger
cylinders from extending
fully.

Inside surfaces of main floor
lock cylinder(s) or outrigger
floor lock cylinder(s) are dirty
/ covered with foreign
matter, which prevents the
cylinder(s) from extending or
retracting fully.

Main floor lock status switch
remains tripped after main
floor locks have extended
(out of adjustment).

Main floor lock status switch
is malfunctioning - stuck
open.

Replace suspect foot
control interface board
with known working foot
control interface board.

Perform continuity check
on 10 amp fuse.

See Figure 5-1 for this
check. Check for 5.0
VDC across Test Points
P and W. If 5.0 VDC is
present, check for 5.0
VDC across Test Points
W and X within 10
seconds of pressing a
foot button on foot
control.

See Figure 5-1 for this
check. Perform a
continuity check on all
suspect wires or
connections.

Remove check valve(s)
and check for foreign
matter.

Remove valve spool(s)
and check for foreign
matter. Flush out valve
spool manifold with oil.

Replace suspect
pressure relief valve with
known working pressure
relief valve.

Check for foreign matter
on inside surfaces of
floor lock cylinders.

Check if status switch is
tripped.

See Figure 5-1 for this
check. Perform
continuity check on
normally closed status
switch (switch untripped
= continuity).

SECTION II

Replace foot control interface
board. Refer to para 4.44.

Replace 10 amp fuse. See
Figure 5-1 for fuse location.

If 5.0 VDC is not present
across Test Points P and W,
the main controller board is
malfunctioning. If 5.0 VDC is
not present across Test Points
W and X during check, then
main controller board or foot
control interface board is
malfunctioning. Refer to para

4.31 or 4.44.
Clean any dirty connections.

Tighten any loose
connections. Replace any
broken connectors or wires.

Remove and clean check
valve(s). Replace any
damaged pilot pistons or
check valves.

Push on manual release pin of
valve spool. If still stuck,
remove valve spool(s) and
check for foreign matter.
Flush out valve spool manifold
with oil.

Replace outrigger pressure
relief valve and spring. Refer
to para 4.30.

Disassemble and clean floor
lock cylinder(s).

If necessary, adjust main floor
lock status switch. Refer to
para 4.42.

If malfunctioning, replace main
floor lock status switch. Refer
to para 4.42.

© Schaerer Mayfield USA, Inc. 2004

Page 2-9Printed in U.S.A.

SECTION II

Return To Table Of Contents

TESTING AND TROUBLESHOOTING

Table 2-1. Troubleshooting Guide

Problem Symptom Probable Cause Check Correction

Error code E01 (Floor
Lock Status Switch Is
Not Responding)
displays on hand
control - Continued.

Error Code E02
(Overcurrent - Motor
#1) displays on hand
control.

Error code E03
(Overcurrent - Motor
#2) displays on hand
control.

Error code E04
(Motor Driver Failure)
displays on hand
control.

Floor lock cylinders do
not extend or retract
properly and error code
E01 appears on hand
control - Continued.

Floor lock cylinders do
not retract properly and
Error code E01 appears
on hand control.

When function is
selected, error code E02
appears on hand
control.

When function is
selected, error code E03
appears on hand
control.

When function is
selected, error code E04
appears on hand
control.

Outrigger floor lock status switch
remains tripped after outrigger
floor locks have extended (out of
adjustment).

Outrigger floor lock status switch is
malfunctioning - stuck open.

Wires or wire connections
between floor lock status switches
and main controller board are
broken, loose or dirty.

One of the floor lock status
switches is malfunctioning.

Retaining ring which holds ouside
floor lock sleeve onto floor lock
cylinder piston is missing.

Motor #1 is malfunctioning. Replace suspect motor #1

Charging / power driver board is
malfunctioning.

Motor #2 is malfunctioning. Replace suspect motor #2

Charging / power driver board is
malfunctioning.

Wires or wire connections
between charging / power driver
board and pumps are broken,
loose, or dirty.

Charging / power driver board is
malfunctioning.

Motor is burned out (most likely
motor #1).

Check if status switch is
tripped.

See Figure 5-1 for this
check. Perform continuity
check on normally closed
status switch (switch
untripped = continuity).

See Figure 5-1 for this
check. Perform a
continuity check on all
suspect wires or
connections.

Perform continuity check
on N.C. floor lock status
switch (switch untripped =
continuity).

Check to see if retaining
ring is missing.

with known working motor
pump.

Replace suspect charging
/ power driver board with
known working board.

with known working motor
pump.

Replace suspect charging
/ power driver board with
known working board.

See Figure 5-1 for this
check. Perform a
continuity check on all
suspect wires or
connections.

Replace suspect charging
/ power driver board with
known working board.

Replace suspect motor
with known working
motor. (If only COLUMN
UP function causes error
code E04, motor #2 could
be malfunctioning - motor
#2 only runs for this
function during normal
operation).

If necessary, adjust outrigger
floor lock status switch.
Refer to para 4.42.

If malfunctioning, replace
outrigger floor lock status
switch. Refer to para 4.42.

Clean any dirty connections.
Tighten any loose
connections. Replace any
broken connectors or wires.

If necessary, adjust or
replace floor lock status
switch. Refer to para 4.42.

Replace retaining ring.

Replace motor #1. Refer to
para 4.26.

Replace charging / power
driver board. Refer to para

4.32.
Replace motor #2. Refer to

para 4.26.

Replace charging / power
driver board. Refer to para

4.32.
Clean any dirty connections.

Tighten any loose
connections. Replace any
broken connectors or wires.

Replace charging / power
driver board. Refer to para

4.32.
Replace motor. Refer to

para 4.26.

© Schaerer Mayfield USA, Inc. 2004

Page 2-10Printed in U.S.A.

Problem Symptom Probable Cause Check Correction

Return To Table Of Contents

Error code E05 (Valve
Driver Failure) displays on
hand control.

Error code E06
(Footswitch Failure)
displays on hand control.

Error code E07
(Trendelenburg Position
Sensor Failure) displays
on hand control.

Table 2-1. Troubleshooting Guide

When ENABLE button is
pressed, or a function
button is selected, error
code E05 appears on
hand control.

When a footswitch button
is depressed, error code
E06 appears on hand
control.

When ENABLE button is
pressed, or a function
button is selected, error
code E07 appears on
hand control.

TESTING AND TROUBLESHOOTING

A valve spool solenoid is
malfunctioning.

Wires or wire connections
between valve spool
solenoid and main controller
board are broken, loose or
dirty.

Main controller board is
malfunctioning - valve driver
circuitry is malfunctioning.

One of two foot switches for
a function is stuck in closed
position or will not complete
circuit when depressed.

Foot control interface board
is malfunctioning.

Wires or wire connections
between foot switches and
foot control interface board
are broken, loose or dirty.

Trendelenburg position
sensor is malfunctioning.

Wires or wire connections
between Trendelenburg
position sensor, distribution
board, and main controller
board are broken, loose, or
dirty.

Main controller board is
malfunctioning.

Press and hold the
SYSTEM OVERRIDE
button on the emergency
panel, while pressing,
one at a time, all the
remaining function
buttons on the
emergency panel (except
for DISABLE button). All
functions should operate
except for function with
malfunctioning valve
spool solenoid.

See Figure 5-1 for this
check. Perform a
continuity check on all
suspect wires or
connections.

Replace suspect main
controller board with
known working main
controller board.

See Figure 5-1 for this
check. Perform a
continuity check on both
foot switches of suspect
function (switch not
depressed = open /
switch depressed =
continuity.

Replace suspect foot
control interface board
with known working foot
control interface board.

See Figure 5-1 for this
check. Perform a
continuity check on all
suspect wires or
connections.

Replace suspect
Trendelenburg position
sensor with known
working position sensor.

See Figure 5-1 for this
check. Perform a
continuity check on all
suspect wires or
connections.

Replace suspect main
controller board with
known working main
controller board.

SECTION II

Replace malfunctioning valve
spool solenoid. Refer to para

4.22 or 4.23.

Clean any dirty connections.
Tighten any loose
connections. Replace any
broken connectors or wires.

Replace main controller
board. Refer to para 4.31.

If check fails, replace foot
switch pad.

Replace foot control interface
board. Refer to para 4.44.

Clean any dirty connections.
Tighten any loose
connections. Replace any
broken connectors or wires.

Replace Trendelenburg
position sensor. Refer to para

4.11.

Clean any dirty connections.
Tighten any loose
connections. Replace any
broken connectors or wires.

Replace main controller
board. Refer to para 4.31.

© Schaerer Mayfield USA, Inc. 2004

Page 2-11Printed in U.S.A.

SECTION II

Return To Table Of Contents

TESTING AND TROUBLESHOOTING

Table 2-1. Troubleshooting Guide

Problem Symptom Probable Cause Check Correction

Error code E08 (Tilt
Position Sensor Failure)
displays on hand control.

Error code E09 (Seat
Position Sensor Failure)
displays on hand control.

Error code E11 (Internal
RAM / Register Failure)
displays on hand control.

Error code E12
(Calibrating data Failure)
displays on hand control.

When ENABLE button is
pressed, or a function
button is selected, error
code E08 appears on
hand control.

When ENABLE button is
pressed, or a function
button is selected, error
code E09 appears on
hand control.

When ENABLE button is
pressed, error code E11
appears on hand control.

When ENABLE button is
pressed, error code E12
appears on hand control.

Tilt position sensor is
malfunctioning.

Wires or wire connections
between tilt position sensor,
distribution board, and main
controller board are broken,
loose or dirty.

Main controller board is
malfunctioning.

Seat position sensor is
malfunctioning.

Wires or wire connections
between seat position
sensor, distribution board,
and main controller board
are broken, loose or dirty.

Main controller board is
malfunctioning.

Battery power level is too
low to properly power table.

Main controller board is
malfunctioning.

Replace suspect tilt
position sensor with
known working position
sensor.

See Figure 5-1 for this
check. Perform a
continuity check on all
suspect wires or
connections.

Replace suspect main
controller board with
known working main
controller board.

Replace suspect seat
position sensor with
known working position
sensor.

See Figure 5-1 for this
check. Perform a
continuity check on all
suspect wires or
connections.

Replace suspect main
controller board with
known working main
controller board.

Plug power cord into
table and press ENABLE
button on hand control to
see if error code E11
displays now.

Replace suspect main
controller board with
known working main
controller board.

Replace tilt position sensor.
Refer to para 4.15.

Clean any dirty connections.
Tighten any loose
connections. Replace any
broken connectors or wires.

Replace main controller
board. Refer to para 4.31.

Replace seat position sensor.
Refer to para 4.19.

Clean any dirty connections.
Tighten any loose
connections. Replace any
broken connectors or wires.

Replace main controller
board. Refer to para 4.31.

If error code still appears,
recharge batteries.

Replace main controller
board. Refer to para 4.31.

Error code E13 (Overheat

- Motor #1) displays on
hand control.

© Schaerer Mayfield USA, Inc. 2004

When ENABLE button is
pressed, error code E13
appears on hand control.

Motor #1 is overheated and
has tripped its primary
thermostat.

Wait 60 to 90 minutes to
allow motor to cool down
and the primary
thermostat to reset.

After table is operational
again, check to see if
motor #1 overheats
continually.

Wait 60 to 90 minutes to allow
motor #1 to cool down and
the primary thermostat to
reset. Replace primary
thermostat. Refer to para

4.40.
If motor #1 overheats

continually (E13), replace
primary thermostat. Refer to
para 4.40. If motor #1 still
continues to overheat (E13),
replace motor. Refer to para

4.26.

Page 2-12Printed in U.S.A.

Problem Symptom Probable Cause Check Correction

Return To Table Of Contents

Error code E13 (Overheat

- Motor #1) displays on
hand control - Continued.

Error code E14 (Overheat

- Motor #2) displays on
hand control.

Error code E15 (Hand
Control Button Switch
Failure) displays on hand
control.

When ENABLE and
UNLOCK buttons on hand
control are pressed, floor
lock cylinders do not
retract.

Table 2-1. Troubleshooting Guide

When ENABLE button is
pressed, error code E13
appears on hand control ­Continued.

When ENABLE button is
pressed, error code E14
appears on hand control.

When ENABLE button is
pressed, error code E15
appears on hand control.

Main floor lock cylinders do
not retract properly.

TESTING AND TROUBLESHOOTING

Wires or wire connections
between motor #1 primary
thermostat and main
controller board are broken,
loose, or dirty.

Motor #2 is overheated and
has tripped its primary
thermostat.

Wires or wire connections
between motor #2 primary
thermostat and main
controller board are broken,
loose, or dirty.

One of two button switches
for a function is stuck in
closed position or will not
complete circuit when
pressed.

Hand control board is
malfunctioning.

Wires or wire connections
between hand control
board, hand control port,
distribution board, and main
control board are broken,
loose, or dirty.

All floor lock valve spool is
clogged.

Inside surfaces of main floor
lock cylinder is dirty /
covered with foreign matter,
which prevents the cylinder
from retracting fully.

Pilot operated check valve is
malfunctioning - not opening
check valve or check valve is
clogged.

See Figure 5-1 for this
check. Perform a
continuity check on all
suspect wires or
connections.

Wait 60 to 90 minutes to
allow motor to cool down
and the primary
thermostat to reset.

After table is operational
again, check to see if
motor #2 overheats
continually.

See Figure 5-1 for this
check. Perform a
continuity check on all
suspect wires or
connections.

See Figure 5-1 for this
check. Perform a
continuity check on both
button switches of
suspect function (button
switch not depressed =
open / button switch
depressed = continuity.

Replace suspect hand
control board with known
working hand control
board.

See Figure 5-1 for this
check. Perform a
continuity check on all
suspect wires or
connections.

Check for foreign matter
in valve spool.

Check for foreign matter
on inside surfaces of
main floor lock cylinders.

Check for broken or bent
components or foreign
matter in pilot operated
check valve.

SECTION II

Clean any dirty connections.
Tighten any loose
connections. Replace any
broken connectors or wires.

Wait 60 to 90 minutes to allow
motor to cool down and the
primary thermostat to reset.
Replace primary thermostat.
Refer to para 4.40.

If motor #2 overheats
continually (E14), replace
primary thermostat. Refer to
para 4.40. If motor #2 still
continues to overheat (E14),
replace motor. Refer to para

4.26.
Clean any dirty connections.

Tighten any loose
connections. Replace any
broken connectors or wires.

If check fails, replace button
board. Refer to para 4.4.

Replace hand control board.
Refer to para 4.5.

Clean any dirty connections.
Tighten any loose
connections. Replace any
broken connectors or wires.

Remove valve spool and clean
valve spool ports out.
Replace valve spool
component if necessary.

Disassemble and clean main
floor lock cylinders.

Remove pilot operated check
valve components. Clean out
any foreign matter. Replace
any broken or bent
components.

© Schaerer Mayfield USA, Inc. 2004

Page 2-13Printed in U.S.A.

SECTION II

Return To Table Of Contents

TESTING AND TROUBLESHOOTING

Table 2-1. Troubleshooting Guide

Problem Symptom Probable Cause Check Correction

When ENABLE and
UNLOCK buttons on hand
control are pressed, floor
lock cylinders do not
retract - Continued.

All functions run too slow. No error codes are

One function is too slow;
the rest are operating
properly.

One function is too fast;
the rest are operating
properly.

Outrigger floor lock
cylinders do not retract
properly.

displayed, but all functions
are too slow or do not
extend or retract fully.

No error codes are
displayed, but function is
too slow or does not
extend or retract fully.

No error codes are
displayed, but column
function moves too slowly
or does not extend or
retract fully.

No error codes are
displayed, but function is
too fast.

All floor lock valve spool is
clogged.

Inside surfaces of outrigger
floor lock cylinder is dirty /
covered with foreign matter,
which prevents the cylinder
from retracting fully.

Pilot operated check valve(s)
is malfunctioning - not
opening check valve or
check valve is clogged.

Motor pump is worn or
leaking.

Motor pump pressure relief
valve is malfunctioning.

Discharge filter is clogged
with foreign matter.

Reservoir strainer is clogged
with foreign matter.

Valve spool for suspect
function is clogged.

One of pilot operated check
valves for suspect function is
malfunctioning - not opening
check valve or check valve is
clogged.

One of orifices for suspect
function is clogged with
foreign matter (does not
apply to column cylinder or
floor lock cylinders).

Cylinder for suspect function
is malfunctioning.

Column plates and wear
pads are binding.

One of orifices for suspect
function is missing ( NOTE:
only applies to early units
which have orifices external
to cylinders.)

Check for foreign matter
in valve spool.

Check for foreign matter
on inside surfaces of
outrigger floor lock
cylinders.

Check for broken or bent
components or foreign
matter in pilot operated
check valve.

Replace suspect motor
pump with known
working motor pump.

Replace suspect
pressure relief valve with
known working pressure
relief valve.

_ Replace discharge filter.

Visually check reservoir
strainer for excessive
foreign matter.

Check for foreign matter
in valve spool.

Check for broken or bent
components or foreign
matter in pilot operated
check valve.

Remove orifice and
check for foreign matter.

Replace suspect cylinder
with known working
cylinder.

Check for foreign matter,
corrosion, nicks,
scratches, or other
damage to wear
surfaces of column plates
or wear pads.

Check for missing orifice. Replace orifice.

Remove valve spool and clean
valve spool ports out.
Replace valve spool
component if necessary.

Disassemble and clean
outrigger floor lock cylinders.

Remove pilot operated check
valve components. Clean out
any foreign matter. Replace
any broken or bent
components.

Replace motor pump. Refer
to para 4.26 or 4.27.

Replace pressure relief valve
and spring. Refer to para

4.29.

Refer to para 4.24.
Replace reservoir strainer.

Refer to para 4.27.

Remove valve spool and clean
valve spool ports out.
Replace valve spool
component if necessary.

Remove pilot operated check
valve components. Clean out
any foreign matter. Replace
any broken or bent
components.

Remove orifice and clean.

Replace malfunctioning
cylinder.

Replace column plates or
wear pads.

© Schaerer Mayfield USA, Inc. 2004

Page 2-14Printed in U.S.A.