TROUBLESHOOTING
D SERIES CONTROLLER
TROUBLESHOOTING AND COMPONENT REPLACEMENT
1-44 August 9, 2005
Kaaaw sk
ERROR CODE D1519 Mismatch of the safety circuit LS condition.
In a double safety circuit system, conditions set for contacts in the limit switch (LS)
circuit do not match.
Main causes include:
1. Defective harness connection or harness (short-circuit or ground fault in harness).
2. Defective LS override switch.
3. Defective 1KP board
Replace the controller/separate/machine harness(es).
Replace the LS override switch.
Replace the 1KP board.
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ERROR CODE D1520 Mismatch of the safety circuit TEACH/REPEAT condition.
Main causes include:
1. TEACH/REPEAT switch setting and relay conditions for switching teach/repeat modes
do not match.
2. Contact condition at the TEACH/REPEAT switch does not match between the first
and second safety circuits.
3. Defective 1KP board.
Check the TEACH/REPEAT switch and relays (RY5 and RY6 on the 1KP board), and
replace as necessary.
Replace the 1KP board.
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ERROR CODE D1521 Mismatch in safety circuit safety-fence condition.
In a double safety circuit system, conditions set for contact at the safety fence circuit do
not match.
Main causes include:
1. Incorrect circuit or wiring for safety fence circuit (single circuit wired).
2. Disconnection or ground fault in the safety fence circuit wiring.
3. Defective safety fence switch.
4. Defective 1KP board.
Inspect contact points at the safety fence circuit and repair or replace as necessary
.
Replace the 1KP board.
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