Troubleshooting Guide - AUMA SG 05.1 Operation Instructions Manual

15. TROUBLESHOOTING GUIDE

Symptom: Valve does not turn during manual or electrical operation (handwheel hard to turn).
Problem: Traveling nut jammed against an end stop.
Solution: Remove the retainer plate bolts, and the stop housing (refer to Figure 1). Using a
15/16" off-set box wrench on the traveling nut, and a 3/4" open-end wrench on the stop
nut, loosen the traveling nut.
CAUTION:
Symptom: Valve does not open fully.
Problem: Open end stop not properly positioned.
Solution: Set the open end stop (refer to Section 9).
Symptom: Indicator disc not operating.
Problem: Indicator disc assembled against control cover.
Solution: Loosen cover bolts, remove control cover, and push down to seat the indicator disc.
Symptom: Limit switches do not function - valve torques out at either end, and indicator disc does
not operate.
Problem: Limit switch drive arm broken or bent (part number 21).
Solution: Contact AUMA representative.
Symptom: Valve will not turn with motor running, but operates manually.
Problem: Damaged planetary gear set.
Solution: Contact AUMA representative.
Symptom: Indicator light is not illuminated when motor stops at an end position.
Problem: Defective light bulb.
Solution: Replace bulb.
Symptom: Indicator light is not illuminated when motor stops at an end position.
Problem: Actuator is stopping on torque switch.
Solution: Reset and retest limit switch, as described in Sections 7 and 8.
Symptom: Indicator light is not illuminated when motor stops at an end position.
Problem: Limit switch LSC and/or LSO wires reversed in actuator.
Solution: LSC - interchange wires 9 & 10 with 33 & 34;11 & 12 with 35 & 36.
LSO - interchange wires 13 & 14 with 37 & 38; 15 & 16 with 39 & 40.
DO NOT LOOSEN THE STOP NUT.
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