Chamberlain door opener - Manual (Page 28)

28
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 DESCRIPTION EFFECT DISPLAY CORRECTION
E1 MAS triggered (cycles or
months). None normal operation. 1 blink Reset MAS.
E2 No RPM input during
opening or closing. The door only responds to
constant pressure commands. 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.
E3 (MRT) Maximum Run
Time timed out. The door stops before
reaching the desired time. 3 blinks First check Operator for any faults (i.e.,
Bad Limit switch), manually learn Max
Run Timer (page 23)
OR reset factory defaults (page 24).
E4 Obstruction sensed on
closing. Operator will be in the OPEN
position. 4 blinks Cleared by removing obstruction or
realigning photo eyes and giving a close
command.
E5 Stuck key button pressed
for greater than 2 minutes. Stuck key on 3-button station
will not respond. 5 blinks Stuck key must be unstuck before it will
be recognized as an input.
E6 Rotary dial in invalid
position for greater than
30 seconds. The door will not respond to
the 3-button station or any
other input. 6 blinks Rotary dial must be set to a valid
position.
E7 Failsafe Safety device
faulted or not connected
for greater than 2 minutes. Normal operation (5 second
constant pressure override
required to close). 7 blinks Cleared when safety device is cleared or
connected.
E8 Brownout Detected. Operator will run as long as
enough power is present. 8 blinks 1. Check AC line for voltage.
2. Check transformer secondary for low
voltage. To many accessories may be
connected to the transformer.
E9 Motor movement at invalid
time. Operator will continue to
function normally for 5
operations and then default to
a constant pressure mode. Flash on start
of movement 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.
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.
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.