FORMA: Service & Maintenance manual - rev. 3.0
Page 6.32
6.8. THE UP-DOWN MOVES IN ONLY ONE DIRECTION
The machine displays this error if:
• a relay on the driver board is defective;
• the CPU board fails to send the enable signal;
• the driver board is not able to drive the motor.
THE UP-DOWN MOTOR
MOVES IN ONE
DIRECTION ONLY
3
VDoes the driver board receive the
correct control signal in the inactive
direction?
Check and/or replace
cable FR-12
Are the relays on the driver board in
good condition?
Replace the driver board
NO
YES
4
YES
NO
NO
Replace the CPU board
Does the CPU board send the
correct control signal in the inactive
direction?
Check and/or replace
cable FR-11
YES
1
Does the correct control signal for
the inactive direction reach trailing
connector CN28?
NO
YES
2
Replace the faulty relays