
64
MicroController Control System
Troubleshooting
PROBLEM 11
Auxiliary switch circuit defect.
POSSIBLE CAUSE
Wiring defect; Auxiliary switch defect; Logics defect.
CHECKS
Disconnect PD or PE connector. Pull auxiliary lever to
maximum. Check continuity from PD-2 to PE-2 or PE-3.
Continuity
No continuity
Replace AUX. switch.
Check continuity from PD-2 of wire #44 to Pin1 of
valve board connector.
Continuity
No continuity
Check continuity of wire #88 or #87.
Continuity
No continuity
Repair or replace wire.
Repair or replace wire.
Replace logics.
Содержание B20S-3
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