JMQ A7 PLUS - Page 23

22
E3
No speed
sensor signal:
The voltage
output is
controlled to the
DC motor, and
the motor speed
feedback is not
received
continuously for
more than 3
seconds.
1. Check that the motor cable is securely
connected to the port
2. When the machine enters the fault
state, the electronic watch buzzer
sounds 9 times, and the fault code is
displayed at the same time. The rest of
the area does not display the content.
After the fault condition is maintained for
about 10 seconds, it enters the standby
state and can be restarted.
Possible reason: The speed sensor
signal is not detected for 3 seconds,
check if the sensor plug is plugged in or
damaged, plug it in or replace the
sensor.
3. When the machine enters the fault
state, the electronic watch buzzer
sounds 9 times, and the fault code is
displayed at the same time. The rest of
the area does not display the content. If
it returns to normal after the shutdown, it
can enter the standby state and start
normally.