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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 2 blinks Clutch is slipping,
constant pressure commands. 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 3 blinks First check Operator
the desired time. 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 4 blinks Cleared by removing
position. obstruction or realigning
photo eyes and giving a close
command.
E5 Stuck key button pressed for greater than Stuck key on 3-button station 5 blinks Stuck key must be
2 minutes. will not respond. unstuck before it will be
recognized as an input.
E6 Rotary dial in invalid position for greater The door will not respond to 6 blinks Rotary dial must be
than 30 seconds. the 3-button station or any set to a valid position.
other input.
E7 Failsafe Safety device faulted or not Normal operation (5 second 7 blinks Cleared when safety
connected for greater than 2 minutes constant pressure override device is cleared or
required to close). connected.
E8 Brownout Detected Operator will run as long as 8 blinks 1. Check AC line for
enough power is present. 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 Flash on start Check relays and the
function normally for 5 operations of movement drive circuitry to insure
and then default to a constant that they are turning off.
pressure mode. 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.