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Troubleshooting (continued)
Display
Code
Message
F95
F95 MOTOR
COMM
F96
F96 INTR
LOCK
F101
F101 BBU
LOW
Possible
Description
Causes
Message with
Powerhead
invalid format
main board
received from
firmware glitch
motor MCU.
or hardware
damage.
INTR LOCK
Hoist is
circuit was
engaged
broken
INTR LOCK
Motor drive
devices
circuit is
disconnected
disabled
or missing
when the
INTR LOCK
circuit is
open.
INTR LOCK
Hoist switch
circuit
cable or hoist
consists of
switch jumper
the INTR
disconnected
LOCK wiring
or missing
terminals
and the
hoist chain
Device
interlock
connected to
switch.
INTR LOCK
terminals is
Operators
open or INTR
without a
LOCK device is
hoist include
faulty
a jumper to
bypass the
Wiring fault
hoist chain
interlock
switch
connections.
Damaged
powerhead
main board
Battery is
Backup battery
present but
is discharged
discharged
due to loss of
(voltage is
AC power.
low)
Battery is worn
out or has failed
Diagnosis
Fault is internal to the
powerhead main board.
See resolution.
Check that the
hoist mechanism is
disengaged.
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.
Check to ensure hoist
switch or jumper are
properly connected.
Check that any devices
connected to INTR LOCK
terminal are in their
normal, closed state to
allow the operator to
move
Check for open circuit or
short circuit wiring faults
for the INTR LOCK wiring.
Disconnect INTR LOCK
devices and replace
with jumper. If fault goes
away, issue is not with
powerhead main board.
Check to ensure that AC
power is present and in
normal operating range
for the operator
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.
69
Resolution
Power cycle the operator.
If the issue persists, reset the
settings to factory defaults and
reconfigure the operator.
If the issue still persists, replace
powerhead main PCBA.
Pull the green rope to disengage
the hoist.
Reconnect INTR LOCK devices.
If no INTR LOCK devices are
intended to be used, then place
a wire jumper between both
terminals.
Correct any wiring issues with
the hoist switch cable or hoist
switch jumper.
Restore INTR LOCK devices to
their normal state.
If a faulty device is attached,
repair or replace the device.
If any wiring fault is found,
correct the fault.
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.
Restore AC power and ensure
battery recharges properly
Replace batteries.
Always replace both batteries
as a set. Do not mix old and new
batteries or use mismatched
types.
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