Rapid-Air PALLET MASTER (PMDH): PMDH35 & PMDH50. 115VAC, 1PH, 60HZ - Manual (Page 12)

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6. Percent speed function set too low.
a. Adjust percent speed function to 100%.
7. Fuses blown.
a. Check fuses & circuit breaker.
8. No AC voltage at DC drive board.
a. Check wiring.
9. Check Signal voltage between P2 to P1 on DC drive.
0-6 VDC—Ramm
0-9 VDC—Regen Drive
while moving dancer arm.
a. If there is a signal, check continuity between I1 & I2.
If no continuity, replace D.C. drive or call factory.
10. Check pico fuse on 69100804 board (F1).
a. Replace fuse, 1 amp pico fuse—call factory.