Chamberlain JDC - Page 57

57
Troubleshooting (continued)
Code
Display
Message
Description
Possible
Causes
Diagnosis Resolution
F61 F61 CTM
FAULT
Cable
Tension
Monitor
(CTM) device
triggered or
missing
Cable tension
lost
Check that CTM devices
have proper cable tension
beneath the roller on the
arm, and that the roller is
properly riding on the cable.
Ensure the cables are
properly wrapped on the
cable drums.
If cable tension is lost, carefully
resolve the issue, check that
limits are set properly, and
monitor the issue to ensure it is
resolved.
Ensure no binding occurs in door
travel that could produce slack
cables.
Improperly
congured
input
Check system settings
item in the menu to check
the the setting for the CTM
input.
Ensure the congured number
of CTM devices matches the
number that are actually installed.
Relearn CTM(s) if necessary.
CTM wiring
fault
Check wiring for short or
open circuit
Ensure wires are wired into
the correct terminals
Correct wiring faults
Damaged
CTM device
Swap CTM(s) with known-
good device
Or verify CTM with
multimeter on ohms range.
A single CTM with the hinge
open should measure 1000
Ohms (1 kOhm). When
closed, a CTM should
measure open-circuit.
If a known-good CTM works,
replace the faulty CTM
Damaged
powerhead
main board
Swap CTM(s) with known-
good CTM(s) connected
directly to the powerhead
main board
If the main board still won't detect
known-good CTM(s) connected
directly to the board, the fault
may exist with the main board.
Attempt power cycling the unit
and, failing that, resetting to
factory defaults. If problem still
persists, replace the main board.
F62 F62 WLESS
BLK
Wireless
edge
blocked
Obstruction
in doorway is
blocking eye
or contacting
edge
Check for obstructions If obstructions are present,
remove the obstruction
Unapproved
safety device
is being used
Ensure the safety device is
approved for use with the
wireless edge kit
Replace the safety device with
one that is approved for use with
the wireless edge kit
Wiring fault to
safety device
Check wiring for short or
open circuit
Correct wiring faults
Damaged
edge
Swap safety device with
known-good device
If a known-good safety device
works, replace the faulty safety
device
Damaged
wireless edge
transmitter
Swap safety device with
known-good device
connected directly to the
transmitter
If the wireless edge still shows
blocked with known-good safety
devices connected directly,
power cycle the operator and the
wireless edge transmitter.
If problem still persists, replace
the transmitter.