Motus M990T, Service Manual

Page: 9 / 105

8
SYMPTOM PROBABLE CAUSE CORRECTIVE ACTION
If all 3 lamps on Start/Stop, Speed Down and Speed UP
do not light up, replace the Touch-Sensitive Key PCB.
Touch-Sensitive Buttons does not work. If a lamp on Start/Stop, Speed Down or Speed UP does
not light up any more than before pressing each button,
replace the Touch-Sensitive Key PCB.
Check the connection between CN4 on Lift/Power
Supply PCB and CN2
(M990TL/M995TL)
on MPU PCB
is exact or connected firmly.
Unplugged or defective cables.
Check the connection between CN4 on Lift/Power
Supply PCB and CN3
(M990TL/M995TL)
on MPU PCB
is exact or connected firmly.
Unplugged or defective cable
Check the cable from the incline motor is connected
firmly to CN20 on Lift/Power Supply PCB.
Incline is not
adjusted by Incline-
Up or Incline-Down
Button.
Lift/Power Supply PCB is damaged. Replace Lift/Power Supply PCB.
If all 3 lamps on Start/Stop, Speed Down and Speed UP
do not light up, replace the Touch-Sensitive Key PCB.
Touch-Sensitive Buttons does not work. If a lamp on Start/Stop, Speed Down or Speed UP does
not light up any more than before pressing each button,
replace the Touch-Sensitive Key PCB.
Unplugged or defective cable
Check the cable from the Drive motor is connected firmly
to the terminal of Motor Controller..
RS485 connection for communication is loose.
If the Console display is normal, check the electrical
connection between MPU of Console and Motor
Controller under motor hood is firm.
3-pin connectors
at MPU
of Display Console
or Lift/Power
Supply PCB are not secure.
Check the connection is secure.
Speed is not
adjusted by Speed-
Up or Speed-Down
Button.
Motor Controller or MPU PCB is defective. Replace Motor Controller or MPU PCB if necessary.