Chamberlain JDC - Page 51

51
Troubleshooting (continued)
Code
Display
Message
Description Possible Causes Diagnosis Resolution
F04 F04
UNAUTH.
STOP
(end)
No motor motion
was detected when
the operator was
attempting to move the
motor.
Worn motor
brushes
Motor DC resistance
should be less than 3
ohms. If it is greater
than 3 ohms, the
brushes may fail to
maintain contact
with the commutator
internal to the motor.
Replace motor
Replace motor brushes
(extended duty models
only)
Powerhead main
board motor drive
fault
Measure DC voltage
across motor
terminals at main
board. In idle state,
voltage should be 0.
Activate door
operator with open/
close.
Voltage may vary
over a wide range,
from several volts up
to about 40 volts DC.
If voltage is absent
during activation, check
for other fault codes and
correct as necessary. If
no other fault codes are
present, power cycle the
operator and try again.
If fault persists, reset
settings to factory
defaults and recongure
the operators.
If fault still persists,
replace main board.
Encoder wiring
fault
Inspect encoder
cable for
disconnection, bad
connection, cut
cable, etc.
Correct any issues found
with encoder wiring
Encoder fault or
encoder interface
fault
Go to limit learn
process. Number
displayed while
in door limit learn
mode is the encoder
position.
Jog door several
inches in either
direction and release
button. Number
displayed should
change.
Make sure to cancel
changes or set limit
again when nished.
If encoder position does
not change with door
movement, the encoder,
encoder wiring, and
powerhead main board
are suspect. Check all
three for any visible
damage.
Attempt power cycling
and restoring factory
defaults.
Replace or repair
suspected faulty
components.
Motor drive fault
occurred
Check for other fault
codes
Review other fault codes
and perform problem
resolution as necessary.
F08 F08 NO
CONFIG
Conguration was not
found or was reset to
factory setting
New operator is
not congured.
If the operator is new,
the conguration is
initially unset.
Congure the operator
per the normal process.
Operator was
factory reset from
the menu
If the operator is
factory reset, the
conguration will be
unset.
Congure the operator
per the normal process.
F14 F14 SET
LIMITS
End positions are not
set or stored
Limits were never
set out of box
New product as
shipped does not
have any limits set
Learn door limits
Settings were
reset or invalidated
from the menu
F14 error Re-learn door limits