LiftMaster HDSW24UL Installation Manual - English - Page 42

TROUBLESHOOTING, Diagnostic Codes, Control Board LEDs

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TROUBLESHOOTING To protect against fire and electrocution: • DISCONNECT power (AC or solar and battery) BEFORE installing or servicing operator. For continued protection against fire: • Replace ONLY with fuse of same type and rating. Diagnostic Codes To View the Codes The codes will show on the diagnostic display. Press and hold the STOP button... ...then press and hold the CLOSE button... ...then press and hold the OPEN button until "Er" shows on the display. The operator will show the code sequence number followed by the code number: CODE SEQUENCE NUMBER The first number shown is the most recent code (example: "01"). The display will show the sequence of codes that occurred starting with "01" and going up to code "20". A SECOND LATER.... CODE NUMBER The second number shown after the code sequence number is the code itself (31-99, example" "31"). Refer to the chart on the following page for an explanation of each code. To Scroll Through the Saved Codes Press the OPEN button to cycle to the most recent code ("01"). Press the CLOSE button to cycle to the oldest code (up to "20"). DIAGNOSTICS DISPLAY OPEN, CLOSE, & STOP BUTTONS To Exit Press and release the STOP button to exit. The display will also time out after two minutes of inactivity. To Reset the Code History 1. Press and hold the STOP button for six seconds. The display will show "Er" then "CL" alternately for six seconds. 2. Release the STOP button. The code history has now been reset and the display will show "- -" until a new code occurs. 3. Press and release the STOP button to exit. The operator will only keep track of up to 20 codes, then will start saving over the oldest codes as new codes occur. See the diagnostic codes table page 59. 42

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42
To protect against fire and electrocution:
•
DISCONNECT power (AC or solar and battery) BEFORE installing or
servicing operator.
For continued protection against fire:
•
Replace ONLY with fuse of same type and rating.
Diagnostic Codes
To View the Codes
The codes will show on the diagnostic display.
Press and
hold the
STOP
button...
...then press
and hold the
CLOSE button...
...then press
and hold the
OPEN button
until "Er"
shows on
the display.
The operator will show the code sequence number followed by the code
number:
A SECOND
LATER
....
CODE SEQUENCE NUMBER
The first number shown is the
most recent code (example:
"01"). The display will show the
sequence of codes that
occurred starting with "01" and
going up to code "20".
CODE NUMBER
The second number shown after
the code sequence number is
the code itself (31-99, example"
"31"). Refer to the chart on the
following page for an
explanation of each code.
To Scroll Through the Saved Codes
Press the OPEN button
to cycle to the most
recent code ("01").
Press the CLOSE button
to cycle to the oldest
code (up to "20").
The operator will only keep track of up to 20 codes, then will start saving
over the oldest codes as new codes occur.
DIAGNOSTICS DISPLAY
OPEN, CLOSE, & STOP BUTTONS
To Exit
Press and release the STOP button to exit. The display will also time out
after two minutes of inactivity.
To Reset the Code History
1.
Press and hold the STOP button for six seconds. The display will
show "Er" then "CL" alternately for six seconds.
2.
Release the STOP button. The code history has now been reset and the
display will show "- -" until a new code occurs.
3.
Press and release the STOP button to exit.
See the diagnostic codes table page 59.
TROUBLESHOOTING