Yaskawa DSD 406 - Manual (Page 73)

4 Maintenance
69 Troubleshooting Guide
3/21/96
Fault/Error Possible Causes &
Code
Fault/Error Name
Corrective Actions
Table 3. Troubleshooting Guide – Continued
800
801
802
803
804
805
806
900
901
902
● LAN Hardware Error
Maximum LAN Retries Exceeded Error
Illegal LAN Message Type Error
LAN Broadcast Message Missed Error
LAN Directed Message Missed Error
LAN-No Transmit Room
LAN-No Receive Room
PCU Loop Fault
Instantaneous Overcurrent Trip (IST)
● Power Supply Fault
Local Area Network (LAN) Error
➊
Check T connectors.
❷
Verify 93 ohm value for terminating
resistors.
❸
Verify that cable lengths do not exceed
recommended values.
❹
Verify that drive is properly grounded.
1. a. Coast Stop Circuit was opened.
b. Contactor Failure (coil or
interlock contact).
2. Contact pilot relay failure.
➊
Check coast stop circuit and repair.
Check contactor and repair.
❷
Replace Power Supply. See “Replacing
the Power Supply”/Maintenance Section.
1. Short circuit in motor armature wiring.
2. Poor current regulator tuning.
➊
Check motor armature and repair as
necessary.
❷
Check current regulator settings.
1. Short circuit in remote power wiring:
a. +5V to tachometer
b. +24V to 24VDC logic
c. +/–15V to Aux circuits
2. Shorts on internal boards.
3. Loss of 115 VAC power
4. Failed power supply
(See Corrective Actions on next page)