Yamaha RCX240 User Manual page 596

[22] Major hardware errors
22.45 : DRIVER interface overtime
A
Code
Dedicated output : *1
22.50 : YC-Link disconnect
Code
22.51 : YC-Link error
Code
22.52 : YC-Link type error
Code
A-74
TROUBLESHOOTING
: &H162D
Meaning/Cause
Failed to acquire access privilege for
interface with driver.
: &H1632
Meaning/Cause
The secondary station connection test
failed at primary station startup.
a. The secondary station power is OFF.
b. The YC-link communication cable and
terminal resistor are disconnected.
c. The secondary station's "station No."
setting is incorrect.
: &H1633
Meaning/Cause
The secondary station failed to start
properly.
a. Secondary station communication
failure.
: &H1634
Meaning/Cause
Mismatch between the secondary station
specifications and the setting.
a. The secondary station controller (SR1)
specifications (SR1-X/SR1-P) or the
current sensor specifications have
been changed (controller was replaced).
Action
1. Replace the driver.
2. Replace the controller.
Action
1. Configure so that the secondary
station power switches ON before or
simultaneously with the primary
station power ON.
2. Verify that the YC-link cable and the
terminal resistor are connected.
3. Check the station No. settings.
Action
Verify that the YC-link cable and the
terminal resistor are connected.
Action
1. Check the connected SR1 type, and
the current sensor specifications.
2. Verify that the station No. setting is
correct.
3. Perform a system generation.