Chamberlain JDC - Page 60

60
Troubleshooting (continued)
Code
Display
Message
Description
Possible
Causes
Diagnosis Resolution
F95 F95 MOTOR
COMM
Message with
invalid format
received from
motor MCU.
Powerhead
main board
rmware glitch
or hardware
damage.
Fault is internal to the
powerhead main board.
See resolution.
Power cycle the operator.
If the issue persists, reset the
settings to factory defaults and
recongure the operator.
If the issue still persists, replace
powerhead main PCBA.
F96 F96 INTR
LOCK
INTR LOCK
circuit was
broken
Motor drive
circuit is
disabled
when the
INTR LOCK
circuit is
open.
INTR LOCK
circuit
consists of
the INTR
LOCK wiring
terminals
and the
hoist chain
interlock
switch.
Operators
without a
hoist include
a jumper to
bypass the
hoist chain
interlock
switch
connections.
Hoist is
engaged
Check that the
hoist mechanism is
disengaged.
Pull the green rope to disengage
the hoist.
INTR LOCK
devices
disconnected
or missing
Check to ensure INTR
LOCK devices are
properly connected to the
INTR LOCK terminals
INTR LOCK terminals
should have jumper
placed if no devices are
connected.
Reconnect INTR LOCK devices.
If no INTR LOCK devices are
intended to be used, then place
a wire jumper between both
terminals.
Hoist switch
cable or hoist
switch jumper
disconnected
or missing
Check to ensure hoist
switch or jumper are
properly connected.
Correct any wiring issues with
the hoist switch cable or hoist
switch jumper.
Device
connected to
INTR LOCK
terminals is
open or INTR
LOCK device is
faulty
Check that any devices
connected to INTR LOCK
terminal are in their
normal, closed state to
allow the operator to
move
Restore INTR LOCK devices to
their normal state.
If a faulty device is attached,
repair or replace the device.
Wiring fault Check for open circuit or
short circuit wiring faults
for the INTR LOCK wiring.
If any wiring fault is found,
correct the fault.
Damaged
powerhead
main board
Disconnect INTR LOCK
devices and replace
with jumper. If fault goes
away, issue is not with
powerhead main board.
If the main board still won't
resolve the fault with a jumper
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.
F101 F101 BBU
LOW
Battery is
present but
discharged
(voltage is
low)
Backup battery
is discharged
due to loss of
AC power.
Check to ensure that AC
power is present and in
normal operating range
for the operator
Restore AC power and ensure
battery recharges properly
Battery is worn
out or has failed
Batteries can be tested
with a suitable battery
tester.
Older batteries are more
likely to be worn out, as
are batteries that are
used often.
Replace batteries.
Always replace both batteries
as a set. Do not mix old and new
batteries or use mismatched
types.