Chamberlain JDC - Page 54

54
Troubleshooting (continued)
Code
Display
Message
Description
Possible
Causes
Diagnosis Resolution
F41
F44
F47
F41 EYE/
EDG1 BLK
F44 EYE/
EDG2 BLK
F47 EYE/
EDG3 BLK
Monitored eyes/
edges 1/2/3
blocked for 3
minutes or more
Obstruction
in doorway is
blocking eye or
contacting edge
Check for obstructions If obstructions are
present, remove the
obstruction
improperly
congured eye/
edge input
Check system settings item
in the menu to check the
device type setting for the
input
Ensure the safety device
type matches the device
that is actually installed
Unapproved
safety device is
being used
Ensure the safety device is
approved for use with the
operator
Replace the safety
device with one that is
approved for use with the
operator
Photoeyes
misaligned
Check alignment If eyes are misaligned,
correct the alignment
Wiring fault to
photoeye emitter
Check that the photoeye
emitter is powered and
wired correctly. LED on
emitter is lit.
Correct wiring faults
Resistive type
edge shorted or
shorted wiring
Check for short circuits in
the wiring or in the resistive
edge.
Correct any wiring faults
Sunlight causing
photoeye
blocking
condition
Block sunlight from shining
in the receiver and check if
photoeye remains blocked
Resolution for this
issue may be dicult.
Swapping the emitter
and receiver can
sometimes provide
relief from the issue, but
other times just causes
the issue to surface at
another time of day.
Damaged photo
eyes or edge
Swap safety device with
known-good device
A properly functioning
resistive edge should
measure 8-14 kOhm in the
normal unobstructed state
If a known-good safety
device works, replace the
faulty safety device
Damaged
powerhead main
board
Swap safety device with
known-good device
connected directly to the
powerhead main board
If the main board still
won't detect known-
good safety devices
connected directly to the
board, power cycle the
operator.
If the problem persists,
reset to factory defaults
and congure again.
If problem still persists,
replace the powerhead
main board.