CIRCLE FITNESS M8 LED User manual

Document: Service Manual
Description: Treadmill
Model: M8 LED
Page: 2 of 66
Release Date: 2017/12
2
TABLE OF CONTENTS
PREFACE....................................................................................................................................................................... 4
1. INFORMATION FOR COMPONENTS & SYSTEM.......................................................................................... 5
1.1 System wiring diagram................................................................................................................................................. 5
1.2 Inverter........................................................................................................................................................................... 6
1.3 Console PCB ................................................................................................................................................................. 8
2. ERROR MESSAGES AND SOLUTIONS...........................................................................................................10
3. ENGINEERING MODE..........................................................................................................................................14
3.1 Engineering Mode 1: Information ..............................................................................................................................14
3.2 Engineering Mode 2: Settings ....................................................................................................................................15
3.3 Engineering Mode 3: Lock Function ..........................................................................................................................17
4. INVERTER AND EXTERNAL CONTROL KEYPAD........................................................................................18
4.1 External Keypad Connection and Moniter Mode ......................................................................................................18
4.2 Use External Key Pad to Control: Start/ Stop/ Accelerate/ Slow down...................................................................19
4.3 Use external Key Pad to to Control: Incline ...............................................................................................................20
5. MAINTENANCE ....................................................................................................................................................21
5.1 General Maintenance..................................................................................................................................................21
5.2 Running belt and running deck lubrication................................................................................................................21
5.3 How to spray silicone on deck ...................................................................................................................................22
5.4 Preventive Maintenance Schedule.............................................................................................................................23
5.5 Running Belt/Deck Maintenance Schedule ...............................................................................................................24
5.6 Troubleshooting the Treadmill...................................................................................................................................25
6. PART REPLACEMENT GUIDE ..........................................................................................................................27
6.1 Toolkits & Components Required ..............................................................................................................................27
6.2 Drive Belt Replacement ..............................................................................................................................................28
6.3 Drive Motor Replacement...........................................................................................................................................33
6.4 Running Belt Replacement .........................................................................................................................................37
6.5 M8 Treadmill Side Rails Replacement.......................................................................................................................42
6.6 Remove and Replace the Quick Shift and Adjust the Tightness..............................................................................47
6.7 Align the Quick Shift to Central Position ...................................................................................................................51
6.8 Panel of Console Replacement.................................................................................................................................. 52
6.9 Emergency Stop Replacement...................................................................................................................................54

Document: Service Manual
Description: Treadmill
Model: M8 LED
Page: 3 of 66
Release Date: 2017/12
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6.10 Hand Pulse Plate Replacement ...............................................................................................................................56
6.11 Inverter Replacement ...............................................................................................................................................57
6.12 Incline Motor Replacement ......................................................................................................................................59
6.13 Membrane and Overlay Replacement .....................................................................................................................63

Document: Service Manual
Description: Treadmill
Model: M8 LED
Page: 4 of 66
Release Date: 2017/12
4
PREFACE
WARNING! Only qualified service technicians should service the treadmill.
WARNING! No service should be undertaken until the technician has thoroughly read this Service
Manual.
CIRCLE FITNESS®provides this manual primarily to assist qualified service technicians in the
service of the appliance.
Should the reader have any questions or concerns which have not been satisfactorily addressed,
please call, send an e-mail message, or write to the CIRCLE FITNESS® Technical Support
Department for assistance.
Tel: [phone]#259
Fax: [phone]
Email: [email protected]
CIRCLE FITNESS®
P &F Brother Ind., Corp.
No.12, 6th Road, Industrial Park, 40755 Taichung Taiwan

Document: Service Manual
Description: Treadmill
Model: M8 LED
Page: 5 of 66
Release Date: 2017/12
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1. INFORMATION FOR COMPONENTS & SYSTEM
1.1 System wiring diagram

Document: Service Manual
Description: Treadmill
Model: M8 LED
Page: 6 of 66
Release Date: 2017/12
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1.2 Inverter
1.2.1 Definition of AC input (TB1)
Terminal
name
Terminal type
Terminal remark
Terminal description
I/O
AC input
TB1
P10ML-03
TKP
3
L
AC input
I
2
N
1
GRD
Grounding
1.2.2 Definition of EMI Filter (CN4)
Terminal name
Terminal type
Terminal
remark
Terminal description
I/O
EMI Filter
connector
XH 7P
2.5mm 180°M
J2
1
FDC +V
O
2
FDC –V
O
3
RS485+
(Communications transmission
terminal)
I/O
4
RRS485-
(Communications transmission
terminal)
I/O
5
IP5V
(5V power)
O
6
SAFE KEY
(Emergency stop input terminal)
I
7
WAKE UP
I

Document: Service Manual
Description: Treadmill
Model: M8 LED
Page: 7 of 66
Release Date: 2017/12
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1.2.3 Definition of RPM speed (J6)
Terminal name
Terminal type
Terminal remark
Terminal description
I/O
RPM speed
XH 2P
2.5mm 180°M
J6
1
RPM Signal input
I
2
GND
--
1.2.4 Definition of Incline motor connector (J8)
Terminal name
Terminal type
Terminal remark
Terminal description
I/O
Incline motor
connector
PCH250
Terminal
J8
1
Incline motor COM terminal
O
2
X
X
3
Incline motor UP terminal
O
4
X
X
5
Incline motor DOWN terminal
O
1.2.5 Definition of Incline motor position feedback (J4)
Terminal name
Terminal type
Terminal remark
Terminal description
I/O
Incline motor
position feedback
XH 3P 2.5mm
180°M
J4
1
GND
O
2
Incline VR signal input
terminal
I
3
DC 3.3V
O

Document: Service Manual
Description: Treadmill
Model: M8 LED
Page: 8 of 66
Release Date: 2017/12
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1.3 Console PCB
1.3.1 Definition of J16 (RJ45 Connector)
PIN
1
2
3
4
Define
GND
12V
RS-485 DX+
GND
PIN
5
6
7
8
Define
12V
RS-485 DX-
ERP
ESP
1.3.2 Definition of J8 (Heart rate, Hand Pulse) Connector
PIN
1
2
3
4
5
Define
Hand contact info.
Separate output
Standard pulse input
VCC
GND
1.3.3 Definition of J1 (Safety Key) Connector
PIN
1
2
3
Define
12V
X
ESP
1.3.4 Definition of J17 (Fan) Connector
PIN
1
2
Define
12V
GND
1.3.5 Definition of J3 (Quick Shaft-Speed) Connector
PIN
1
2
3
Define
Fast
COM(5V)
SLOW
1.3.6 Definition of J7 (Quick Shaft-Incline) Connector
PIN
1
2
3
Define
Up
COM(5V)
Down

Document: Service Manual
Description: Treadmill
Model: M8 LED
Page: 9 of 66
Release Date: 2017/12
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1.3.7 Definition of J4 (Bluetooth) Connector
PIN
1
2
3
4
Define
5V
GND
RS-232-Rx
RS-232-Tx
1.3.8 Definition of J2 (Bluetooth) Connector
PIN
1
2
Define
5V
GND

Document: Service Manual
Description: Treadmill
Model: M8 LED
Page: 10 of 66
Release Date: 2017/12
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2. ERROR MESSAGES AND SOLUTIONS
Item
Error Message
Descriptions
1.
CALORIES
TIME
E01
LE1
Output power is too low while in motion (DC Bus lower than 150V), input
voltage of 220VAC system is lower than 110VAC, and input voltage of
110VAC system is lower than 70V AC.
Analysis and Solution:
1) Input voltage error: Check the input voltage to ensure range is within
±20%.
2) Poor contact of input voltage cable: Check the cable connections.
3) Unstable input voltage: Instantly turn off and on the power, it won’t
release all the current from the system so that it can detect the error.
2.
CALORIES
TIME
E04
OC
Output current of inverter is too high which is higher than rated 200%.
Analysis and Solution:
1) Running belt/deck is worn: It will cause the motor current (input
current) to be too high. Should replace the running belt/deck and
properly add lubrication (non-self lubricating system), check the input
current status; Motor current (output current) should be the value as
below, user weight is lower than 100 kilogram and under 8km/h:
New Machine
Slight wear
Moderate wear
Need exchange
Output current
5↓
6↓
7.5↓
7.5↑
2) Inverter is damaged: Detecting current component of inverter is
damaged, if operate normally and motor current (output current) is in
range, the inverter should be replaced.
3) Motor lack phase: It will increase the current, check motor cable UVW
connection or measure U-V / V-W / W-U, regularly it should be low
resistance not open circuit.
3.
CALORIES
TIME
E06
OE
Input AC voltage is too high, voltage of inverter capacitance (PN) is
higher than 410V.
Analysis and Solution:
1) Input voltage is too high: Check the input AC voltage is too high or
unstable; regularly it should be lower than 250V AC.
2) Back electromotive force (Back-emf) of motor: It will probably cause
back-emf to be too high if the user is heavy weight and run faster in at
high incline level, which cause the inverter to operate out of
protection. You may contact us via email for the further information.

Document: Service Manual
Description: Treadmill
Model: M8 LED
Page: 11 of 66
Release Date: 2017/12
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Item
Error Message
Descriptions
4.
CALORIES
TIME
E21
PrEr
Flash application of inverter error, the inverter should be replaced.
5.
CALORIES
TIME
E22
EEr
EEPROM of inverter error, the inverter should be replaced.
6.
CALORIES
TIME
E08
9F
Leakage or output three-phase current of motor unbalance, check the
connection of motor cable or replace motor.
7.
CALORIES
TIME
E09
0H
Heat sink of inverter is detected over 85℃, cool it down and restart.
Analysis and Solution:
Running belt/deck is worn: It will cause the motor current (input current)
to be too high, it’s probably in a long term of Moderate wear or Need
exchange status so that it causes the temperature to become too high,
should you replace running belt/deck and properly add lubricating
system), check the input current status; Motor current (output current)
should be at the value as below, user weight is lower than 100 kilogram
and under 8km/h:
New Machine
Slight wear
Moderate wear
Need exchange
Output current
5↓
6↓
7.5↓
7.5↑
8.
CALORIES
TIME
E10
0L
The motor current is operating higher than rated 110% in a certain time,
which means the loading is too high, should replace the running
belt/deck.
Analysis and Solution:
Running belt/deck is worn: It will cause the motor current (input current)
to become too high, it’s probably in a long term of Need exchange status
so that cause the current is too high, should replace running belt/deck
and properly add lubrication (non-self lubricating system), check the
input current status; Motor current (output current) should be the value
as below, user weight is lower than 100 kilogram and under 8km/h:
New Machine
Slight wear
Moderate wear
Need exchange
Output current
5↓
6↓
7.5↓
7.5↑
9.
CALORIES
TIME
E11
0L1
Motor current is exceed the rated 150%, the loading is too high, should
replace the running belt/deck.
Running belt/deck is worn: It will cause the motor current (input current)

Document: Service Manual
Description: Treadmill
Model: M8 LED
Page: 12 of 66
Release Date: 2017/12
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Item
Error Message
Descriptions
to become too high, it’s probably in a long term of Need exchange status
so that because the current is too high, should replace running belt/deck
and properly add lubrication (non-self lubricating system), check the
input current status; Motor current (output current) should be the value
as below, user weight is lower than 100 kilogram and under 8km/h:
New Machine
Slight wear
Moderate wear
Need exchange
Output current
5↓
6↓
7.5↓
7.5↑
10.
CALORIES
TIME
E02
ntcF
Temperature sensor is abnormal, replace the inverter.
11.
CALORIES
TIME
E13
LF
Motor cable is not connected, check the connection.
12.
CALORIES
TIME
E14
dbuP
The brake system of inverter is damaged, replace the inverter.
13.
INCLINE
Err
Incline motor won’t reach the selected position.
Analysis and Solution:
Restart the treadmill.
Press start then modify
the incline up to 15.
Incline motor works?
YES
Incline motor stops
working in 1-2 seconds?
YES
Replace incline motor.
NO
NO
Incline motor got stuck,
check and figure out the
problem is.
System operates
normally.
INCLINE
Err

Document: Service Manual
Description: Treadmill
Model: M8 LED
Page: 13 of 66
Release Date: 2017/12
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Remove the Emergency stop wire.
Press GO to start.
Shows “EMERGENCY STOP”.
Reconnect the RJ45 network cable
or replace it.
Check if the
Emergency Stop
button is connected
properly.
14. Press GO then Message window shows”EMERGENCY STOP”: Emergency protection of
inverter.
EMERGENCY STOP
NO
YES
Remove the console back cover.

Document: Service Manual
Description: Treadmill
Model: M8 LED
Page: 14 of 66
Release Date: 2017/12
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3. ENGINEERING MODE
3.1 Engineering Mode 1: Information
In idle mode, press (Clear) button and press “0020” on numeric keypad then press (Enter)
button. MESSAGE window shows “FACTORY SETTINGS” once then provided the information
below:
NOTE: If (Clear) button is pressed but the number is wrong or no actions within 10 seconds, it
can’t be login. Please repeat the login process again.
Total Used Time:
MESSAGE window shows “TOTAL HOURS”and TIME window shows total used hours
(0-9999). When total used time is reached to 9999, it will reset to zero, and DISTANCE
window shows “1”. Press SPEED▼/INCLINE▼button to next setting.
Software Version:
MESSAGE window shows “VERSION”and TIME window shows “X.XX”.
Total Used Distance: (Depend on the unit is Metric/Imperial)
MESSAGE window shows “0D0”and TIME window shows total used distance (0-9999
km/mi).
When total used distance is reached to 9999, it will reset to zero, and DISTANCE
window shows “1”. Press SPEED▼/INCLINE▼button to next setting.
Average Used Speed: (Depend on the unit is Metric/Imperial)
MESSAGE window shows “AVERAGE SPEED”and TIME window shows the value. Press
SPEED▼/ INCLINE▼button to next setting.
* Average Used Speed= Total Used Distance/ Total Used Time
Error Message Record:
MESSAGE window shows “ERR HISTORY”and CALORIES window shows the 1-5 (Error
record number 1-5). DISTNACE & TIME window shows the total used time and SPEED
window shows the average speed when the error message occurred, press SPEED▲
/SPEED▼button to select 1 to 5. Press SPEED▼/ INCLINE▼button to next setting.
Language selection:
Press SPEED▲/SPEED▼button to select the preferred language.
Here are 8 languages for user to select:
『ENGLISH』or『NEDERLANDS』or『FRANCAIS』or『ITALIANO』or 『ESPANOL』or
『DEUTSCH』or『PYCCKN』or『TURKISH』.
Press (Enter) button to confirm
and return to idle mode.
Press SPEED▼/ INCLINE▼button
to show the software version.

Document: Service Manual
Description: Treadmill
Model: M8 LED
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Release Date: 2017/12
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3.2 Engineering Mode 2: Settings
In idle mode, press (Clear) button and press “0001”on numeric keypad then press (Enter)
button. MESSAGE window shows “FACTORY SETTINGS”once then provided the information
below:
NOTE: If (Clear) button is pressed but the number is wrong or no actions within 10 seconds, it
can’t be login. Please repeat the login process again.

Document: Service Manual
Description: Treadmill
Model: M8 LED
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Release Date: 2017/12
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T (Unit) setting:(Metric/Imperial)
MESSAGE window shows “UNITS METRIC”, press
“Fast/Slow/Up/Down” to change to “UNITS
IMPERIAL”. Press (Enter) to confirm and go to
next setting.
GS setting: (GS INCLINE ON/ GS INCLINE OFF)
MESSAGE window shows “GS INCLINE OFF”,
press “Fast/Slow/Up/Down” to change to “GS
INCLINE ON”. Press (Enter) to confirm and go
to next setting.
Minimum frequency setting: (Setting range: 10-100 (1.0- 10.0 Hz))
TIME window shows the current value, MESSAGE window shows “MIN SPEED HZ”; press
“Fast/Slow/Up/Down”to change the frequency. Press (Enter) to confirm and go to next setting.
Maximum frequency setting:
(Setting range: 10-100(1.0-10.0Hz))
TIME window shows the current value, Message
window shows ”MAX SPEED HZ”, press
“Fast/Slow/Up/Down” to change the frequency.
Press (Enter) to confirm and go to next setting.
MAX SPEED setting:
SPEED window shows the current value,
MESSAGE window shows ”MAX SPEED”, press
“Fast/Slow/Up/Down” to change the maximum
speed. Press (Enter) to confirm and go to next
setting.
MIN SPEED setting:
SPEED window shows the current value, MESSAGE window shows ”MIN SPEED”, press
“Fast/Slow/Up/Down” to change the minimum speed. Press (Enter) to confirm and go to next setting.
Maximum incline setting:
INCLINE window shows the current value, MESSAGE window shows ”MAX INCLINE”, press
“Fast/Slow/Up/Down” to change maximum incline setting. Press (Enter) to confirm and go to next setting.
HRC Control setting: (Default setting is Dual.)
Message window shows “INCLINE”, press
“Fast/Slow/Up/Down” to change to “SPEED” or
“DUAL”. Press (Enter) to confirm and go to next
setting.
STEP ON/OFF setting:
To enable/disable the belt running when no user is
on the running belt. Message window shows “STEP
OFF”, press “Fast/Slow/Up/Down” to change to
“STEP ON”.
Bluetooth ON/OFF setting: (Optional Function)
Message window shows “BT OFF”, press
“Fast/Slow/Up/Down” to change to “BT ON”. Press
(Enter) to confirm and return to idle mode.
NOTE:
* SPEED: Only speed is automatically adjusted.
Incline is manually adjusted.
* INCLINE: Only incline is automatically adjusted.
Speed is manually adjusted.
*DUAL: Both speed and incline are automatically
adjusted.
Heart rate change is detected every 30 seconds.
Speed is adjusted by 0.1 when heart rate target
difference is more than 3 and adjusted by 0.2
when difference is more than 10. Incline is
adjusted by 1%.

Document: Service Manual
Description: Treadmill
Model: M8 LED
Page: 17 of 66
Release Date: 2017/12
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3.3 Engineering Mode 3: Lock Function
3.3.1 Lock
This Lock Function is used to preset a distance to lock the treadmill for maintenance purpose. If
the total used distance is equal to the preset distance, treadmill will pop out a message “LOCKED”
and cannot be used when next powering-on.
Setting Procedure:
In idle mode, press (Clear) button and press “0400”on numeric keypad then press (Enter)
button. MESSAGE window shows “LOCK TIME” and TIME window shows “0”.
NOTE: If (Clear) button is pressed but the number is wrong or no actions within 10 seconds, it
can’t be login. Please repeat the login process again.
Use numeric keypads to set password and press button to return to idle mode.
(Setting range: 0-9999, 0 means lock function is disabled.)
3.3.2 Unlock
Please contact Circle Fitness if you need further assistance.

Document: Service Manual
Description: Treadmill
Model: M8 LED
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Release Date: 2017/12
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4. INVERTER AND EXTERNAL CONTROL KEYPAD
4.1 External Keypad Connection and Moniter Mode
1) Connect the External Keypad (KP-208) to the inverter as showing below.
2) Monitor Mode Operation
External Keypad
Present output frequency
Not available
Not available
Status of incline motor
Not available
Not available
Not available
Output
System DC BUS
Output frequency setting
Output voltage

Document: Service Manual
Description: Treadmill
Model: M8 LED
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Release Date: 2017/12
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4.2 Use External Key Pad to Control: Start/ Stop/ Accelerate/ Slow down
You can press PROG to login parameter
page in any mode then press ▲▼to select
F_001.
Press FUN/DATA to login F_001, initial
setting is 【0】
Press ▲to set it 【1】.
Press FUN/DATA to save and leave.
Accelerate
Start Stop
Slow down

Document: Service Manual
Description: Treadmill
Model: M8 LED
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Release Date: 2017/12
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4.3 Use external Key Pad to to Control: Incline
Incline present parameter.
Incline parameter set
point.
Incline up
Incline down
Monitor mode