CYBEX 400T Owner's Operating Manual

The 400T measures, monitors, and
motivates your fitness and health.

The 400T

Owner’s Operating Manual

CYBEX International, Inc.
10 Trotter Drive, Medway, Massachusetts 02053 USA

LT-12396 Rev F

READ ALL INSTRUCTIONS BEFORE USING

GROUNDING INSTRUCTIONS

This treadmill is intended for household use. This treadmill must be grounded. If it should malfunction or
break down, grounding provides a path of least resistance for electric current to reduce the risk of electric
shock. This product is equipped with a cord having an equipment-grounding conductor and a grounding
plug. The plug must be plugged into an appropriate outlet that is properly installed and grounded in
accordance with all local codes and ordinances.

DANGER:Improper connection of the equipment-grounding conductor can result in a risk of

electric shock. Check with a qualified electrician or serviceman if you are in doubt as to
whether the treadmill is properly grounded. Do not modify the plug provided with the
treadmill; if it will not fit the outlet, have a proper outlet installed by a qualified electrician.

This treadmill is for use on a nominal 115 VAC, 60 Hz ±5%, 20 amp (220/240 VAC, 50 Hz ±5%,15 amp)
grounded, dedicated circuit. Make sure that the treadmill is connected to an outlet having the same
configuration as the plug. No adaptor should be used with this treadmill.

IMPORTANT SAFETY INSTRUCTIONS

When using a treadmill, follow these precautions:

Know your treadmill. Read and understand the Owner’s Operating Manual and labels affixed to the
treadmill. Read all instructions before using.

DANGER: To reduce the risk of electric shock, always unplug this treadmill from the electrical

outlet immediately after using it and before cleaning it.

WARNING: To reduce the risk of burns, fires, electric shock, or injury:

1. Never leave the treadmill unattended when plugged in and running. After turning off the treadmill,
don’t leave it until it comes to a complete stop. To disconnect, turn all controls to the STOP or OFF
position, and then remove the plug from the outlet. Unplug from outlet when not in use and before
removing or installing parts.

2. Keep close supervision of the treadmill when it is used by or near children, invalids, or disabled
persons.

3. Use the treadmill only for its intended use, as described in this manual. Do not use attachments
not recommended by the manufacturer.

4. Never operate the treadmill if it has a damaged cord or plug, if it is not working properly, or if it has
been dropped or damaged. Return for service or have treadmill serviced by a qualified technician.

5. Keep the cord away from heated surfaces and sharp edges.

6. Never drop or insert any objects into any opening or any moving part of the treadmill. Keep hands,
hair, and loose clothing and towels away from the running belt area.

7. Do not use outdoors.

8. Do not operate where aerosol (spray) products are being used or where oxygen is being used.

9. All repairs, electrical or mechanical, should be attempted only by trained repair personnel. Contact
the nearest authorized CYBEX dealer or other competent repair service. Use only CYBEX
replacement parts; any other may create a hazard.

10. To disconnect, turn all controls to the STOP or OFF position, and then remove the plug from the
outlet. Connect this treadmill to a properly-grounded outlet only. See Grounding Instructions.

Save These Instructions

P

REFACE

This manual is written for use in North America, the United Kingdom,
and other English-speaking areas. For your convenience, all
measurements and voltage requirements are listed in both English and
metric units. English values are listed first, followed by metric units in
parentheses. For example: 1 in. (2.54 cm).

Before you assemble your 400T, you should check to make sure it is
the right model and has the correct voltage requirements for your area.

To check for the correct model and voltage requirements, locate the
end of the power cord where it connects to the base of the machine.
As you face the machine, the power cord attaches at the rear left side,
near the On/Off (I/O) switch. The voltage requirements are printed on a
label placed to the left of the power cord.

If you are a resident of North America (U.S.A. or Canada), the voltage
requirements for this unit are 115 VAC, 60 Hz, and 20 amps.

If you are a resident of the U.K. or Europe, the voltage requirements on
the label should read 220/240 VAC, 50 Hz, 15 amps.

Do not attempt to use this unit with a voltage adaptor.

© 1999 CYBEX INTERNATIONAL, INC.
All rights reserved. Printed in USA

Warning: Changes or modifications to this unit not expressly
approved by the party responsible for compliance could void the
user’s authority to operate the equipment.

Note: This equipment has been tested and found to comply with the

limits for a Class B digital device, pursuant to Part 15 of the FCC Rules.
These limits are designed to provide reasonable protection against
harmful interference in a residential installation. This equipment
generates, uses, and can radiate radio frequency energy and, if not
installed and used in accordance with the instructions, may cause
harmful interference to radio communications. However, there is no
guarantee that interference will not occur in a particular installation. If
this equipment does cause harmful interference to radio or television
reception, which can be determined by turning the equipment off and
on, the user is encouraged to try to correct the interference by one or
more of the following measures:

• Reorient or relocate the receiving antenna.

• Increase the separation between the equipment and receiver.

• Connect the equipment into an outlet on a circuit different from
that to which the receiver is connected.

• Consult the dealer or an experienced radio TV technician for help.

NOTE: For European customers only.

TABLE OF CONTENTS

1 INTRODUCING THE 400T

Treadmill Exercise and Fitness 3
Treadmill vs. Other Forms of Exercise 4
The 400T Design 5
Historical Background 5
Special Features of the 400T 6

2 S

ETUP & ASSEMBLY

Choosing and Preparing a Site 8
Electrical Power Requirements 8
Unpacking 8
Assembling the 400T 9

3 G

ETTING STARTED

Starting the 400T 12
Setup Mode 14
Programmed Workouts 15
P1 Manual Mode:

Creating A Personal Workout 16
Saving Your Personal Workout As P6 18
Switching from Manual to Program Mode 18
% Grade vs. Degrees of Incline 18

4 PROGRAMMED WORKOUTS

Selecting a Programmed Workout 20
Stopping a Programmed Workout 21
Pausing a Programmed Workout 22
Changing a Programmed Workout 22
Changing Level in a Programmed Workout 23
Saving a Modified Program 23
Scanning Workout Data 23
P1 Manual and P6 Saved Program Modes 24
P2 Speed Challenge Program 25
P3 Cardiovascular Program 27
P4 Weight Loss Program 29
P5 Fitness Test Program 31

5 MAINTENANCE

Preventive Maintenance 33
Running Belt/Deck Maintenance 34
Running Belt Adjustments 34
Service Schedule 36

6 TROUBLESHOOTING

Service Reminders 37
Error Codes 39
Diagnostic Tests 42
Customer Hotline 48
Returned Goods Authorization (RGA) 48
Damaged Treadmill or Parts 49

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1 / INTRODUCING

THE 400T

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1 / INTRODUCING THE 400T

Congratulations and thank you for purchasing the CYBEX 400T
programmed treadmill. The 400T combines the latest treadmill
technology with superior operation to help you achieve your
personal fitness goals, whether they are to train for specific sports,
condition your cardiovascular system, or just feel better in your
daily activities.

The 400T is simple to operate and program. It combines high
performance with convenience and safety. The digital readouts on
the 400T provide real-time feedback on the status of your program
and your level of exertion. You always know how you are doing at
each stage of your workout.

Treadmill Exercise and Fitness

Exercise on a CYBEX treadmill is one of the best ways to improve
your health, your physical fitness, and your well-being. It is
recommended by many of today’s leading physicians, fitness
spokespersons, and authorities. A combined program of regular
physical exercise, sufficient rest, and sound nutrition is the best
way to improve your health, increase your resistance to disease,
and expand your physical capacity and mental alertness.

The CYBEX treadmill not only helps you improve your health, but it
is also your key to physical fitness. As the American College of
Sports Medicine (ACSM) has pointed out in a recent position
statement, there is a distinction between an individual’s overall
health and physical fitness. If you exercise only to improve health,
you can “reduce the risk of certain chronic degenerative diseases”
but you won’t improve your endurance or your ability to perform
activities throughout your life. Whereas, fitness is “the ability to
perform moderate to vigorous levels of physical activity without
undue fatigue and the capability of maintaining such ability
throughout life.”

Total physical fitness means something different for each person’s
body. Each time you exercise, you have to be receptive to the
level of exercise your body can handle. The ACSM recommends
that an individual perform some aerobic activity 3 to 5 days per
week to sustain the heart rate at 60% to 90% of its maximum
capacity. This recommendation covers a wide range of activities
and you may find it difficult to determine just how much and how
hard you should exercise. Your CYBEX 400T treadmill contains a
unique self-evaluation program that helps you determine your level
of cardiovascular fitness. You use the self-evaluation program not
only to determine where to begin your exercise program but also
to help you evaluate your progress.

If you improve your health,
you reduce the risk of certain
chronic degenerative diseases.

If you improve your
fitness, you can
perform moderate to
vigorous activity
without undue fatigue.

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THE 400T

One goal of physical fitness is a healthier heart that gets
progressively stronger. It doesn’t matter how young or old you are,
if you exercise regularly without overdoing it, your heart rate will
improve. Your resting pulse may also go down, which means that
your heart isn’t working as hard for even your most mild daily
activities. A stronger heart also means that you must exercise more
vigorously to attain the recommended 60%-90% of its capacity.
The 400T programs include several levels of difficulty for each
programmed workout. You will never outgrow your CYBEX
treadmill’s ability to challenge your fitness goals.

Treadmill vs. Other Forms of Exercise

With a CYBEX 400T in your home or office, you can exercise daily,
at whatever time is most convenient for you. You don’t have to
worry about traffic or weather conditions. In the clean air of an
inside environment, you won’t be bothered by car fumes, city
smog, or unstable walking/running surfaces. With a CYBEX
treadmill in the home or office, you can also exercise in privacy. You
can watch television, listen to music, dictate business letters, or
simply enjoy the satisfaction of a solitude that’s dedicated to
fitness.

The advantages and benefits of a treadmill:

• Real-time Results — See the total calories burned and distance
achieved immediately and accurately

• Control — Choose your own program of exercise to set the pace

• Safety and Comfort — Walk or run on a smooth, stable, and flat

running surface

• Cardiovascular Exercise — Help your heart function more
efficiently, increase bone density to help fight osteoporosis, and
minimize strain on your back and spine

• Convenience — Exercise any time you want, 24 hours a day

The programs included with your CYBEX treadmill are designed to
improve one or more of the following aspects of your workout:

• Speed

• Duration

• Intensity

If your workout includes running and you enjoy training for road
races, you may be interested in the programs CYBEX offers to
increase your speed. Speed gains in running are difficult to achieve
since it is often difficult to maintain a consistently fast pace
throughout a workout and at the same time push yourself just a
little to realize speed gains. The CYBEX treadmill helps you set a
challenging pace and gives you a chance to stretch your limits,
without overdoing the workout.

The American Heart Association states
that regular aerobic physical activity
plays a significant role in preventing
heart and blood vessel disease.

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1/ INTRODUCING THE 400T

If your workout includes walking or jogging, you may be interested
in improving the duration of your workout, or your ability to
exercise for longer periods of time without stress. For example, you
may now be able to walk for 2 miles and would like to be able to
walk 4 or more miles for exercise. This kind of exercise is ideal if
you are interested in weight reduction or in maintaining your current
physical condition.

If the goal of your workout is to improve your cardiovascular
system and your ability in sports, you may be interested in the
programs that vary the intensity of exercise. Some of the
CYBEX programs vary exercise intensity through a process called
interval training. Interval training improves fitness by incorporating
anaerobic with aerobic exercise. Aerobic activity strengthens your
heart and lungs, and anaerobic activity improves muscular
performance.

The 400T Design

All CYBEX treadmills are strong, solid, and well-engineered. The
body of each CYBEX is a welded, one-piece chassis of 12-gauge
(.254 cm thick) steel. The body has no frame nuts and bolts to
shake loose; you won’t hear any rattles or other unnecessary noise
during your workout. Powered by a strong, quiet, and durable 2­horsepower, continuous duty rated DC motor, the 400T will give
you years of carefree operation with low maintenance.

The CYBEX 400T is safe, comfortable, and easy to use. Its
cushioned handgrips and wide, impact-absorbing running deck
ensure your comfort during a workout. The wide-open front surface
design lets you run or walk forward freely, at any speed or incline.
The handgrips of the 400T are out of the way, yet remain easily
accessible, when and if you need them. Running belt guards
prevent towels or loose clothing from catching at points where the
rollers and belt meet.

Historical Background

The use of treadmills is not new; they actually date back to pre­Roman times. More recently, William Cubitt, an Englishman, is
credited with the invention of the first modern treadmill, in 1817, as
a device to grind grain.

As a means of personal exercise, however, the use of the treadmill
is relatively new. On-going discoveries of the benefits of this form

*If a Polar®compatible heart rate transmitter is worn.

Interval training combines aerobic
exercise to strengthen your heart with
anaerobic exercise to improve muscular
performance.

CYBEX 400T features include:

• Four programmed workouts
designed to meet the guidelines set
forth by the American College of
Sports Medicine

• Ability to create and store your own
personal workouts

• User-friendly digital display to
measure and monitor your workout

• Smooth, cushioned running surface

• Open front to accommodate the
longest stride

• Over twenty-five years of treadmill
manufacturing experience

• Large worldwide dealer, sales, and
service network

• Customer Service Hotline number:
Call 888-462-9239 in North America.
Dial 508-533-4300 or
Fax [phone] in all other areas.

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1 / I

NTRODUCING THE 400T

of exercise and recent dramatic changes in the availability of
special features and advances in electronic design have greatly
increased its popularity and use in commercial fitness centers and
in the home.

With each succeeding generation of treadmills, CYBEX has
improved the performance and increased the level of automation.
As the 400T demonstrates, CYBEX’s new goals are to combine the
latest in state-of-the-art electronics and microprocessor design
with ease of use and comfort. CYBEX’s experience of over twenty­five years in the fitness industry means that not only is your CYBEX
the finest treadmill available today, but that we will be there
tomorrow to answer any of your questions and to provide support
throughout the life of your machine.

Special Features of the 400T

The 400T improves upon the design and performance of its
predecessors. CYBEX has improved and streamlined the features
and functions of earlier units to address the needs of today’s
fitness enthusiast in the 400T.

Whatever your regimen, you can set your own pace with a CYBEX
400T. Walk or run at the speed and incline you choose. Hit the hills
when you’re ready and cool-down on the flats. Eliminate knee­jamming downhill runs. Vary the speed, time, distance, and incline
from day to day; increase workout length and difficulty; or repeat
the same routine each day. You decide because your treadmill is
programmable.

The 400T gives you true training capabilities, including a warm-up
period before the main workout and a cool-down period after, in
accordance with the American College of Sports Medicine
recommendations.

The 400T includes a choice of programs to meet specific, individual
fitness and conditioning goals, whether they be weight loss,
cardiovascular conditioning, speed training, or basic body
maintenance.

Fig. 1-1: Display Panel

*If a Polar®compatible heart rate

transmitter is worn.

With all new electronics, this
generation of CYBEX treadmills
measures, monitors, and
motivates you like never before.
The two digital displays report
your incline in % grade, speed,
elapsed time (or the time
remaining, if in a program),
distance, calories burned, pace in
minutes, seconds, calories
burned per hour and heart rate.*
It’s like having a personal trainer
to encourage you toward better
health and fitness.

Programmed workouts are designed
in accordance with the American
College of Sports Medicine
recommendations.

7

2 / SETUP & ASSEMBLY

Front Roller Cover

Base
(Chassis)
Assembly

Foot Pad

Running Belt

Running Belt Tension Bolts

Handgrip

Display Panel

Console
Support
Bars

Console

8

2 / SETUP & ASSEMBLY

Setting up your 400T is simple and easy. Before you unpack the
machine, however, be sure to select a suitable site and have the
proper electrical outlet power available for optimum 400T
operation and safety.

Choosing and Preparing a Site

The area you select for the 400T should be well-lit and well­ventilated. Locate the 400T on a structurally sound and level
surface a few feet from walls or furniture. If the 400T is to be
located above the first floor, place it near or above major support
beams. If the area has a heavy, plush carpet, the air flow around
the base of the machine may be restricted or the carpeting may
interfere with the moving parts. To protect the carpeting and the
machinery, you can place a

3

¼4 inch (1.9 cm) thick wood base

under the 400T.

Do not install the 400T in an area of high humidity, such as in the
vicinity of a steam room, sauna, or indoor pool. Exposure to
extensive water vapor and/or chlorine could adversely affect the
electronics as well as other parts of the machine.

A comfortable environment will help you enjoy your exercise
routine and give you additional motivation to continue.

Electrical Power Requirements

The CYBEX 400T requires a standard 115 VAC, 60 Hz, 20 amp
(220/240 VAC, 50 Hz, 15 amp) grounded outlet on a dedicated
circuit. Contact your electrician if you have any doubts about your
electrical service.

Do not use a ground plug adaptor to adapt the 3-prong power
cord plug to a nongrounded electrical outlet. We do not
recommend the use of an extension cord.

Unpacking

Unpack and remove the treadmill from its shipping container.
Check for the following parts and tools (see Figure 2-1):

Base (chassis) assembly

Control panel console

Console support bars (2)

Owner’s Operating Manual

Warranty & Registration Card

Button-head screws (1/2” long) for the front roller cover (4)

Button-head screws (3/4” long) for the top of the support bars (4)

Nuts (1/2” Hex) for the bottom of the support bars (8)

Allen wrenches (Hex key), 3/16”, 5/32”

Front roller cover

If any of these parts are missing from your package, contact your
CYBEX dealer at once.

Specifications

Overall Length: 69 in. (175 cm)

Overall Width: 30 in. (76 cm)

Running Area Length: 52 in. (132 cm)

Running Area Width: 18 in. (46 cm)

Weight: 250 lb. (113 kg)

Programs: 4 preset, 1 custom

Levels of Difficulty: 9 per program

Manual Mode: Yes

Speed Range: 1.0 to 10.0 mph

(1.6 to 16.1 kph)

Incline Range: 0 to 12% grade

Chassis Construction: 12-gauge uni-welded steel

Deck Material: Wax-coated wood

Electrical Voltage: 115 VAC (220/240 VAC)

Operating Frequency: 60 Hz (50 Hz)

Power Requirement: 20 amp (15 amp)

Outlet Requirement: Grounded

Circuit Requirement: Dedicated

Plug Configuration: NEMA #5-15 (CEE 7/7)

Fig. 2-1: Carton contents

9

2 / SETUP

& ASSEMBLY

Additional Tools

In addition to the Allen wrenches shipped with the treadmill, a few
common household tools will be required to assemble the treadmill:

1. Phillips head screwdriver

2. 1/2” open end or socket wrench or adjustable wrench

3. 3/4” open end or socket wrench or adjustable wrench

Assembling the 400T

To ensure correct assembly of the 400T, carefully read and follow
these steps:

1. Identify the left and right side console support bars (they are not
interchangeable) and locate their screw holes on the top and
bottom. The holes mark the inner surface of the bars and will face
inward (toward the center of the treadmill) when they are set into
place. The outer surface of each bar has a long, plastic insert.

2. The plastic inserts are fastened to each support bar by two
Phillips head screws. Remove the screws and slide the inserts up
the bars about 10”.

3. On the right side of the treadmill base, locate four threaded bolts.
Pick up the right support bar and insert the bolts through the
corresponding holes in the bar. The top front edge of the support
bar should be higher than the rear edge. (If the rear edge is
higher, the left support bar is on the right side.) Thread the four
1/2” hex nuts over the bolts and finger tighten them. Use a 1/2”
wrench to secure the nuts and the right support bar to the
treadmill base.

4. Repeat the above step for the left support bar.

5. Slide the long, plastic insert on the right bar back over the
support bars and into position. Secure with two Phillips head
screws. The left insert should remain up for the following
assembly steps.

6. Pick up the control panel console and gently lower it into position
on top of the support bars. Place the two steel tabs (with the two
threaded screw inserts) on the top of the support bars. Thread the
wire cable and its connector through the left support bar (Figure
2-2a) and down to the base of the treadmill (Figure 2-2b), being
careful not to pinch the cable between the console and the bar.

7. Plug the pin connector (male) into its receptacle (female) from the
relay box end. Note that the connector is made so that it will fit
into the receptacle in only one direction. To insure good electrical
contact, push the pin connector in until it clicks.

8. Slide the long, plastic support bar insert down into place and
secure it to the base with two Phillips head screws.

9. Slide the control panel console into place on the support bars.
Insert four 3/4” button-head screws through the holes in the

Fig. 2-2b: The console control cable

Fig. 2-2a: Threading the console control cable

10

2 / SETUP

& ASSEMBLY

console and bars and tighten the console securely to the bars
using the 3/16” Allen wrench (included).

10. Place the front cover into position on the front of the treadmill.
Insert the four 1/2” button-head screws through the holes in the
cover and screw them into the base using the 5/32” Allen
wrench (included). Tighten them securely.

Checking the 400T

Use the following instructions to test the full speed and incline
range of the treadmill and check the belt for proper operation.

1. Without anyone on the treadmill, plug the power cord into a
power outlet from a 115 VAC, 60 Hz, 20 amp (220/240 VAC, 50
Hz, 15 amp) grounded, dedicated electrical circuit.

2. Locate the On/Off (I/O) power switch on the lower left side of
the treadmill chassis (Figure 2-5). Turn it to the On (I) position to
bring power to the internal treadmill components.

3. The control panel continuously displays the prompt message
PRESS START when the treadmill is dormant with the On/Off
(I/O) power switch turned On (I) and the treadmill power cord
plugged in. (CYBEX recommends that the treadmill be
unplugged or the On/Off (I/O) power switch turned Off (O) when
it is not in use.)

4. Press START/ENTER to enter the Program Select Mode.

5. Upon entering the Program Select Mode, the center window
lights to prompt the user to press the appropriate keys to
change the program and/or level. The display shows “- +
PROGRAM and ▼▲ LEVEL.” After 5 seconds, the PRESS
START message will begin to flash.

6. Press START/ENTER to accept the default program, 1. Manual
mode. The treadmill begins a countdown in both display
windows, “3...2...1,” and sounds a tone for each count. After it
reaches one (1), the treadmill gives a steady tone, and then
starts accelerating the belt to reach 1 mph (1.6 kph).

7. The left display will flash the incline set point of 0% grade and
the right display will flash the speed set point of 1.0 until the
treadmill reaches these settings, at which time the values will
stop flashing and remain steadily illuminated.

8. Press and hold down the SPEED + key until the treadmill
reaches a speed of approximately 4 mph (6.4 kph), as indicated
on the display.

9. Observe the belt to see that it is running properly: it should stay
centered in the middle of the deck. If you have problems with
the running belt operation, see Chapter 5, Running Belt
Adjustments.

10. Run the treadmill through its full speed range. First press the
SPEED + key until the treadmill reaches its highest speed, 10

Fig. 2-3: Location of relay box

Fig. 2-4: Relay box

Fig. 2-5: On/Off (I/O) power switch

11

2 / SETUP & ASSEMBLY

mph (16.1 kph). Then press the SPEED – key until the treadmill
is back to 1.0 mph (1.6 kph).

As you press the INCLINE or SPEED increase or decrease keys,
the left display will flash the selected incline and the right display
will flash the selected speed. The control panel will continue to
flash these settings as the treadmill “seeks” to reach the
selected incline and/or speed values.

When the treadmill reaches the set incline and speed, the
displays will stop flashing and remain steadily illuminated to
indicate that the desired settings have been reached.

11. Run the treadmill through its full % grade range. Press the
INCLINE ▲ key until the treadmill reaches its highest grade
(12%). Then press the INCLINE ▼ key until the treadmill is
back to 0% grade.

12. Press STOP three times to stop the running belt, end the
checkout session, and return the display to dormant
mode (with continuous display of the PRESS START
prompt message).

Your treadmill is now ready for use. Follow the instructions in the
next chapter to learn how to operate the treadmill. You should
begin with walking speeds first, to be sure everything is
functioning properly.