Troubleshooting
89
DRUM MOTOR COMMON
20:1 O.H. DRUM MOTOR
This error code will be shown if the control system detects that the input OH DRUM MOTOR is deactivated during program run.
The overheating protection is automatically restored. When the overheating protection is restored the error code is automatically reset and the ongoing program will continue. A long press on the control knob/start button will make the control system reset and ongoing program will be ended.
The error code can be trigged if:
1. The motor is very warm. Check that the vent holes in the motor are not covered.
If the overheating protection is not trigged, but there is still an error code:
2. Check the harness, connectors and functions by reading the electrical schematic and by using the SHOW INPUTS menu when the machine is in service mode.
20:2 NO MOTOR COMMUNICATION
This error code occurs if the first message sent from the CPU to the MCU was not replied to during start up.
Recommended actions:
1. Check that there is power reaching the MCU. Check the fuses in the Protection Cable. If one of the components in the Protection Cable is damaged, the cable must be replaced.
2. Check that the indicator LED on the MCU is on. The LED can be seen by looking down by the MCU edge connections.
3. Check that the communication cable between the CPU board and the MCU is intact and not damaged. Measure also with a reference instrument to see whether there is contact between all the leads in the communication cable.
20:3 LOST MOTOR COMMUNICATION
This error code occurs if the communication between the CPU and the MCU has stopped working.
Recommended actions:
1. Check that there is power reaching the MCU. Check the fuses in the Protection Cable. If one of the components in the Protection Cable is damaged, the cable must be replaced.
2. Check that the indicator LED on the MCU is on. The LED can be seen by looking down by the MCU edge connections.
3. Check that the communication cable between the CPU board and the MCU is intact and not damaged. Measure also with a reference instrument to see whether there is contact between all the leads in the communication cable.
