LiftMaster TDC Installation Manual - English French Spanish - Page 54

Display, Message, Description, Possible, Causes, Diagnosis, Resolution, Swapping the emitter

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Troubleshooting (continued) Code Display Message Description Possible Causes Diagnosis Resolution F41 F41 EYE/ Monitored eyes/ Obstruction Check for obstructions If obstructions are EDG1 BLK edges 1/2/3 in doorway is present, remove the F44 blocked for 3 blocking eye or obstruction F44 EYE/ minutes or more contacting edge F47 EDG2 BLK improperly Check system settings item Ensure the safety device F47 EYE/ EDG3 BLK configured eye/ edge input in the menu to check the device type setting for the input 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 Check for short circuits in Correct any wiring faults edge shorted or the wiring or in the resistive shorted wiring edge. Sunlight causing photoeye blocking condition Block sunlight from shining in the receiver and check if photoeye remains blocked Resolution for this issue may be difficult. 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 knowngood safety devices connected directly to the board, power cycle the operator. If the problem persists, reset to factory defaults and configure again. If problem still persists, replace the powerhead main board. 54

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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
configured 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 difficult.
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 configure again.
If problem still persists,
replace the powerhead
main board.