Sunny SF-T7917, User Manual, Page: 21 / 22

20
TROUBLESHOOTING
NOTE: If you are unable to resolve an issue using the troubleshooting guide above, please
contact Customer Service at support@sunnyhealthfitness.com
PROBLEM POSSIBLE CAUSE SUGGESTED ACTION
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The safety key falls off.
Put the safety key back.
Change the safety key switch or
sensor. If it still doesn’t work, change
the computer module.
E1
Inverter communication
error.
Change the communication middle
wire or the communication lower wire.
Change the computer module.
E2 Stall speed production.
Check if DC motor wire was inserted
well.
Change the control board.
Check if voltage is AC 100-120V.
E3 Speed inductor failed.
Check if the wire of optical sensor
were inserted properly.
Change the control board.
E4
Incline learning failed.
Check if the wire of incline motor is
inserted properly.
Change the control board.
Change incline motor.
E5 Over current production.
Check if the resistance is too big.
Change DC motor.
Change the control board.
E6 Incline inductor failed.
Check if the wire of incline motor were
inserted properly.
Change incline motor.
No display No electricity or damage.
Check if the overload protector is
tripping off. If yes, just press it.
Check if the power switch, overload
protector, power cord, and the control
board were inserted well.
Change the control board.
Version 3.1