Morse 90
º
Worm Gear
Component Specific Problems
Inline Gear Reducer
Door exhibits
sluggish or no
movement and
operator arm can
be moved freely
Internal damage to the worm
gear has occurred; replace
Worm Gear.
Back drive is over
40 lb. at strike
Inline reducer
may be have
excessively tight
internals; replace
reducer.
DAU
When plugged in,
PLC power light
dims and DAU
may not power up
Power to operator
isn't sufficient:
check for voltage
underload
DAU or Cable is
bad: check cable
Phoenix
connector
connections
No 5 VDC from
PLC: check for
voltage at
Phoenix
connector
ALL presets and
RTDP values
read zero
PLC Run/
Program switch is
in Prog position:
Move switch to
Run position
Altered presets don't
appear to set and/or
go to zero after power
cycle
Presets are being
entered in the
wrong programing
area. Assure
correct serial
number selection
is made on initial
DAU screen.
