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Troubleshooting (continued)
Display
Code
Message
F26
F26 OVER
VOLT
F31
F31 WC
F32
OPEN HELD
F33
F32 WC
CLOSE
HELD
F33 WC
STOP HELD
F34
F34 SBC
HELD
Description
Possible Causes Diagnosis
Motor drive
AC input voltage
circuitry detected
mis-selected
an overvoltage
(120V/240V
condition
models only)
Door imbalance
causes motor
regeneration
AC power out of
range
Wall control
Wall control
buttons held/
buttons stuck
stuck for at least
1 minute.
Faulty Wiring
Faulty LCD wall
control
Faulty powerhead
main board
Input SBC button
Input device
held/ stuck for at
wiring short or
least 2 minutes.
open circuit.
Check whether the
transformer connector
is plugged in to the
connectors on the EMI filter
board marked '120V' or
'240V.'
Verify this matches the input
AC voltage supplied to the
operator.
Inspect door for imbalance
or broken springs
Verify input AC voltage:
Measure AC voltage
between 'L1' and 'L2'
terminals at EMI filter
board input connector.
Verify voltage is within
specifications.
If voltage is outside
specifications, see
resolution.
Check that all buttons return
to the normal state properly
when released.
Inspect Wall Control wiring
to main board and Wall
Control terminals
Swap wall control with
known-good unit
Remove all accessories
from OPEN/CLOSE/STOP/
SBC terminals. Ensure wall
control is replaced with
a known-good unit for
diagnosis.
Inspect wiring at SBC
terminals for open or short
73
Resolution
If 240V power is
applied when 120V is
selected, damage to
other components of
the operator electronics
may have occurred.
Ensure voltage selection
is corrected and verify
the operator functions.
Repair or correct
conditions resulting
in excessive door
imbalance
Ensure the circuit
supplying the operator is
the correct voltage class
for the operator (e.g.
120V, 240V, or 480V)
If voltage is out of
specification for the
circuit, consult an
electrician.
Repair, clean, or replace
sticking buttons or
controls as necessary.
Correct any wiring faults
found
If known-good wall
control resolves the
issue, fault is with
previous wall control
Try power cycling the
operator and restoring
factory defaults.
If problems persist,
replace powerhead main
PCBA
Correct wiring fault
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