Troubleshooting Error Codes - Chamberlain GT Owner's Manual

TROUBLESHOOTING ERROR CODES

Logic 3.0 operators incorporate a self diagnostic feature built into
the MAS LED. In addition to indicating when routing maintenance
is due, the MAS LED can be used to troubleshoot some problems
with the operator.
If the MAS LED is flashing on and off rapidly, the Maintenance
Alert System has been triggered and the schedule operator
service is due. If the MAS LED flashes 2 or more pulses in a row
ERROR CODE
E1 MAS triggered (cycles or months)
E2 No RPM input during opening or closing
E3 (MRT) Maximum Run Time timed out
E4 Obstruction sensed on closing
E5 Stuck key button pressed for greater than Stuck key on 3-button station
2 minutes.
E6 Rotary dial in invalid position for greater
than 30 seconds.
E7 Failsafe Safety device faulted or not
connected for greater than 2 minutes
E8 Brownout Detected
E9 Motor movement at invalid time
NOTES: Error codes take priority over normal MAS LED operation. Error codes will repeat on the MAS every 1.5 seconds until cleared.
There may be more than one error present, but only the highest priority will flash. If the highest error is cleared, the next highest will
flash. All errors self-correct when the corrective action is taken and a reset is not needed.
DESCRIPTION
followed by a pause, an operator error has occurred. To view how
many errors currently exist, turn the selector dial to DIAGNOSTIC
and press the OPEN button. To read out each individual error
code (if more than one exists) press CLOSE. It is possible to have
more than one error at a time.
The chart below can assist with identifying the flashes on the
MAS LED.
EFFECT
None normal operation
The door only responds to
constant pressure commands.
The door stops before reaching
the desired time.
Operator will be in the OPEN
position.
will not respond.
The door will not respond to
the 3-button station or any
other input.
Normal operation (5 second
constant pressure override
required to close).
Operator will run as long as
enough power is present.
Operator will continue to
function normally for 5 operations of movement
and then default to a constant
pressure mode.
30
DISPLAY CORRECTION
1 blink Reset MAS.
2 blinks Clutch is slipping,
adjust clutch, or verify RPM
sensor connection or replace
RPM sensor.
NOTE: To relearn the RPM
sensor, move the door with a
constant pressure command.
The door will stop once
relearned and normal
operation will resume.
3 blinks First check Operator
for any faults (i.e., Bad Limit
switch), manually learn Max
Run Timer (page 25)
OR reset factory defaults
(page 26).
4 blinks Cleared by removing
obstruction or realigning
photo eyes and giving a close
command.
5 blinks Stuck key must be
unstuck before it will be
recognized as an input.
6 blinks Rotary dial must be
set to a valid position.
7 blinks Cleared when safety
device is cleared or
connected.
8 blinks 1. Check AC line for
voltage.
2. Check transformer
secondary for low voltage. To
many accessories may be
connected to the transformer.
Flash on start Check relays and the
drive circuitry to insure
that they are turning off.
Operator must run correctly
for two starts for the error to
be cleared.