BH FITNESS S1Ti Installation and operating manual

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BH Fitness Service and Repair Manual:
S1Ti, T300i, T500i
S1T i
T300i
T500i

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S1Ti Service Manual
Table of Contents
1. Warnings…………………………………….............pg. 3
2. Current Compensation Procedure.……….............pg. 4
3. Test Mode……………………………………...........pg. 6
4. Calibration Procedure……………………...............pg. 7
5. No Display……………………………………..........pg. 9
6. E1 Error……………………..…………….…………pg. 16
7. E2 Error………………………………………………pg. 18
8. E3 Error.……………………………………………..pg. 21
9. E4 Error………………………………………...........pg. 24
10. E6 Error………………………………………………pg. 27
11. E8 Error………………………………………………pg. 34
12. Table of Contents: Repair and Replacements…..pg. 35

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Warnings page
In these pages, you will experience 3 levels of warnings about the procedures you are
about to perform. Understand the level of danger each sign signifies and use the proper
amount of caution with each procedure.
When you see this sign, we will be performing a test that requires
measuring line voltage or a similar voltage that could cause serious
injury or death. Take precautions that include setting probes
securely before applying line voltage, not touching bare energized
terminals or parts of the circuit boards, checking insulation on wires
before handling them, properly setting and maintaining test
equipment, and following the procedure precisely. Never put yourself
at risk regardless of how you interpret the instructions. Call BH
Support at 866-325-2339 if you have any questions or feel unsafe before trying any of
the instructions.
When you see this sign, we will be performing a procedure with the
parts of the unit moving. Take precautions that include: avoiding
pinch points; keeping hair, jewelry, clothing, probe leads, tools and
body parts out of possible entanglements. Serious injury could
occur if precautions are not taken. Call BH Support at 866-325-2339
if you have any questions or feel unsafe before trying any of the
instructions.
When you see this sign, we will be performing a procedure that may
be a little challenging. An example would be laying over the treadmill
to work underneath. Improper layover of the treadmill could damage
furniture in the customer’s home, scratch the floor, scratch the
treadmill or cause the unit to fall on you. Use your good technician
judgment when you perform these procedures in a way that is safe
for you, the unit and the customer’s home.

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S1Ti Current Compensation Procedure
This procedure can help you smooth out motor operation after replacing a
new DC motor or controller or on an older DC motor or controller not
working properly.
When the computer shows “ENTER WEIGHT”, remove the safety key and
press and hold and while replacing the safety key. The
computer will show “EN4 CURRENT COMPENSATE VALUE”.
Press to see the current value. The default value is 25.
To reduce sluggishness or bogging down,
Increase the value by 5 counts using and then press to save
the change. Press 2 times until the computer resets to the “ENTER
WEIGHT” screen.
Start the unit and walk on the running belt at various speeds to see if the
result is acceptable. Repeat these steps if necessary.
Turning up the value too high will make the running belt surge in speed.
Reduce the value to eliminate surging.
To reduce surging in speed,
Decrease the value by 5 counts using and then press to save
the change. Press 2 times until the computer resets to the “ENTER
WEIGHT” screen.
Start the unit and walk on the running belt at various speeds to see if the
result is acceptable. Repeat these steps if necessary.

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Turning the value too low will cause the running belt to be sluggish and bog
down too much under load. Increase the value to eliminate bogging.

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S1Ti Test Mode
Enter this mode to check software version, get miles and hours, perform a display test
or key test.
To enter test mode, turn on the power switch, remove the safety key and press and hold
and simultaneously while placing the safety key.
The computer shows:
The software version is scrolling across the bottom. The mileage is in the center and the
hours are in the upper left.
Press , the computer shows:
Press and the computer will go through a scrolling display test. Press to
end the test.
Press , the computer shows:
Press to start the test. The computer will display “PRESS ALL KEYS”. When
you press each key, its name will appear in the display. After all keys are pressed, the
display will show “PASS”
Press and the computer shows
Press and the computer will show “WAIT” and then give a series of beeps.
When the screen returns to “CLR EEP”, the eeprom has been cleared and the mileage
and hours are reset.
Press to exit test mode.

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S1Ti Calibration Procedure
From the “ENTER WEIGHT” screen, remove the safety key. Press and
hold the and simultaneously while replacing the safety key
until the computer shows
Press and computer will show
If this value is set inaccurately the speed of the treadmill will be off.
Press and computer will show
If this value is set too low, the motor may fail prematurely from high
torque requirements.
Press and computer will show
If this value is set inaccurately, the controller may be unable to reach
the requested speed.
Press and computer will show
If this value is not set correctly, the incline will be inaccurate and may
show errors.
will select English units
will select metric units
If the value is not 60.00,
use the or
to set to 60.00
If the value is not 1.0,
use the to set to 1.0
If the value is not 10.0, use
the or
to set to 10.0
If the value is not 15,
use the to set to 15

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Press and computer will show
Press and computer will show
Press and computer will show “EN1 PRESS START TO
CALIBRATE”
Press and computer will display “CALIBRATE” while calibrating.
If the calibration is successful, the computer will reset to the “ENTER
WEIGHT” screen.
If calibration cannot be completed, an error code will be displayed.
If the computer shows
“INC OFF”, press
to turn the incline on
If the computer shows
“GS OFF”, press to
turn the GS on
Do not stand on the tread belt when Quick
Start is pressed. The treadmill will quickly
go to top speed and will incline up and
down during calibration.

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S1Ti No Display Overview
Good
No 0VAC OVAC
110 VAC Bad
Yes 110 VAC
No Trip
Yes
Trips again No
No No VAC No Cont.
Yes Yes Continuity
0 Vdc
12 Vdc
Bad Good
Tech Note: The display shuts off to conserve
energy after 4 minutes. Pressing a button will
turn the display back on.
This procedure assumes proper power supplied
to the unit. Check that first.
Step 1. Is the
power switch
lit when on?
Step 2. Check
110 VAC at
power switch
Step 3. Check
power wire
socket and wires
Step 4.
Check power
cord
Isolate power wire
socket and power
wires. Replace bad
part.
Replace
controller
Step 6.
Disconnect
controller
and check
for trip.
Step 5. Is the
circuit breaker
tripped?
Replace
power switch
Replace
power cord
Isolate
short in
power
wires
Step 7. Does
the light come
on on the
controller?
Step 8. Check
110 VAC at
controller
Step 9. Check
circuit
breaker/wires
Replace
circuit
breaker
Replace
controller
Step 10.
Check Vdc
at controller
Replace white
wire from
controller to
power switch
Step 11. Check
continuity on
control wire up
and lower
Replace
computer
Isolate
wires.
Replace
bad
section.

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S1Ti No Display
Step 1: Visually check for power switch light
Turn the power switch on and if 110 VAC is present at the switch, the light in the center
of the switch should be lit.
Step 2: Check for 110 VAC at the power switch
Unplug the power cord from the unit .
Set the voltmeter for VAC.
Place 1 lead in the black wire and one lead in white wire on top of
power switch as shown.
Plug power cord in and turn power switch on.
No light.
Go to Step
2
Yes the switch is lit, go to Step 5.
Less than
110 VAC
go to
step 3
110 VAC present, go to Step 5

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S1Ti No Display
Step 3: Check power wire socket and wires
Unplug the power cord from the unit .
Set the voltmeter for VAC.
Detach black and white power wires
from bottom of power switch.
Place 1 lead in the black wire and one
lead in white wire as shown.
Plug power cord in.
Step 4: Check power cord
Unplug the power cord from the unit and the outlet.
Set the voltmeter for 
Check each prong at both ends.
Each should be less than .5 
Less than
110 VAC
go to Step
4
110 VAC present, replace power
switch
Greater than .5 Ω on any
lead –replace power cord
Continuity less than .5 Ω on all three leads –
check each wire on power wire socket and
each terminal on the power wire socket.
Replace defective part

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S1Ti No Display
Step 5: Check for circuit breaker trip
Visually inspect circuit breaker for being popped
out.
Unplug the power cord from the unit.
Set the voltmeter for .
Place 1 lead on each terminal of the circuit
breaker.
The circuit breaker should measure less than 1
if not tripped.
Step 6: Isolate source of circuit breaker trip
Turn off the power switch and unplug the power cord
Wait for the light on the controller to go out.
Disconnect the black and white power wires from the
controller.
Set the wires so the metal ends will not make contact with metal or each other.
Plug power cord in and turn power
switch on.
Check for circuit breaker trip.
Circuit
breaker is
tripped or has
no continuity.
Go to Step 6
Circuit breaker not tripped, has
continuity, go to Step 7
Circuit breaker did not
trip. Replace
controller
Circuit breaker trips
again, unplug unit and
find short in power
wires

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S1Ti No Display
Step 7: Visually check light on the controller
With the unit plugged in and turned on, the controller light should be on if 110VAC is
present at the controller.
Step 8: Check for 110 VAC at the controller
Turn off the power switch and unplug
the power cord from the unit .
Set the voltmeter for VAC.
Place 1 lead in the black wire and
one lead in white wire as shown.
Plug power cord in and turn power switch on.
Controller light
The
controller
light is not
on. Go to
step 8
The controller light is on, go to Step 10
No VAC at
controller.
Go to Step
9
110 VAC at controller, go to Step 10

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S1Ti No Display
Step 9: Check circuit breaker and wires
Turn off the power switch and unplug the power cord from the unit .
Set the voltmeter for .
Place 1 lead in the black wire going to the
circuit breaker and one lead into the black wire
going from the circuit breaker as shown
The voltmeter should read around .3
Step 10: Check for 12 VDC at the power switch
Set the voltmeter for VDC.
On the control wire lower, note pins 2
and 5 where the orange and black
wires are located.
Place one meter lead on pin 2 and one
on pin 5. You may have to remove
some hot glue to get access to the metal pins.
Check for 12 VDC.
Greater than .3 Ω or OL, check
each of wires and circuit breaker
and replace defective part
.3 Ω or less, replace the white
wire from the controller to the
power switch
12 VDC
present,
go to Step
11
0 VDC or less than 10 VDC,
replace controller

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S1Ti No Display
Step 11: Check resistance on control wire up and lower
Turn the power switch off and unplug the power cord.
Set the voltmeter for 
Disconnect the control wire at the top and bottom.
Using the metal pads on the control wire connector check each
wire at the top and bottom.
The resistance should be less than .5 
You may need assistance to do this.
Less than .5 Ω
on all wires,
replace
computer
Greater than .5 Ω on any of the wires,
check individual control wire sections.
Replace defective section

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S1Ti E1 error overview
This error is a communication error between the computer and the controller. Loss of
connection on the control wire up or lower will cause this error.
Good Good
Bad Bad
Step 1. Check
continuity on
control wire up
and lower
Step 2. Check
pins of
controller and
computer
Replace
computer and
controller
Check up and
lower section.
Replace defective
part
Straighten
pins. If not
fixed, replace
component.

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S1Ti E1 error
Step 1: Check resistance on control wire up and lower
Turn the power switch off and unplug the power cord.
Set the voltmeter for 
Disconnect the control wire at the top and bottom.
Using the metal pads on the control wire connector check each
wire at the top and bottom. The resistance should be less than
.5 You may need assistance to do this.
Step 2: Check control wire connection pins on controller and computer
Turn the power switch off and unplug the power cord.
Disconnect the control wire at the top and bottom. Check the connectors at the
controller and computer. All the pins of the connectors should be straight and mate well
with the connectors on the wires.
Resistance greater than
.5on any of the wires:
isolate which part of control
wire is defective by
performing the test on each
part. Replace defective
control wire.
Wires
good.
Go to
Step 2
Bad pins found. Straighten pins if
possible. If the connector is too
damaged to take control wire,
replace that component.
All pins good, replace
controller and computer.

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S1Ti E2 Error Overview
This error is predominantly seen in calibration mode when the treadmill is determining speed
values based on information from the speed sensor. In normal mode, the treadmill can run on
saved values for speed control.
Bad
Good
E2 Good
Bad
Step 1.
Check sensor
Replace
sensor
Step 2. Check
sensor gap
and calibrate
Step 3. Check
continuity on
control wire
Replace
controller,
computer
Isolate control
wires. Replace
defective wire.

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S1Ti E2 Error
Step 1: Check Sensor
Turn the power switch off and unplug the power cord.
Set the voltmeter for Ω
Disconnect the sensor wire from controller.
With the magnet in front of the sensor, the resistance
should be less than .5 Ω
With the magnet not in front of the sensor, the resistance
should be less than OL.
Step 2: Check Sensor Gap
The sensor should be pointed toward the magnet on the
front roller.
The sensor should be less than 3/8” away from magnet.
If sensor is turned away or at wrong angle, loosen screw
and pivot sensor to correct angle.
If sensor is too far from magnet, cut hot glue and adjust
sensor closer to magnet. Reglue if needed.
Perform calibration as per S1Ti calibration procedure.
Voltmeter shows OL or
less than .5 Ω all the time.
Replace sensor
Sensor tests good, go
to Step 2
E2 in calibration,
go to Step 3

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S1Ti E2 Error
Step 3. Check resistance on control wire up and lower
Turn the power switch off and unplug the power cord.
Set the voltmeter for Ω
Disconnect the control wire at the top and bottom.
Using the metal pads on the control wire connector check each wire
at the top and bottom. The resistance should be less than .5 Ω You
may need assistance to do this.
Resistance greater than .5on any
of the wires: isolate which part of
control wire is defective by
performing the test on each part.
Replace defective control wire.
Wires good.
Replace
computer and
controller