Diagnosis Led - Chamberlain LiftMaster CB202 Instructions

DIAGNOSIS LED

The LED diagnostics always shows the latest upcoming issue. If several issues occur the LED diagnostics does not show them.
Example: The gates' guiding rail is soiled and the drive performs a safety reversal due to too high force. After that the photocell beam got
interrupted. Diagnosis: As long as the photocell beam is interrupted the diagnosis LED flashes 6x respectively 7x.
Indication Description
1x blinking Motor has insufficient connection to control board
2x blinking Limit switch GATE CLOSED
3x blinking Limit switch GATE OPEN
4x blinking Interruption of programming / no programming
5x blinking Force too high. Force very unsteady
6x blinking Photocells 1 block installation
A: Obstacle interrupts beam
B: poor alignment of the lenses
C: power supply for photocells not sufficient
7x blinking Photocells 2 block installation
8x blinking Emergency stop blocks installation
9x blinking Safety edge blocks installation
A: Obstacle pushes safety edge
B: Safety edge defective
C: Power supply too low or wire damaged
10x blinking Power supply to control board too low
A: 230V supply defective or faulty connection
B: damaged wire in powercable
C: Back up battery (optional accessory) empty
11x blinking EEPROM Fault
Power up failed
12x blinking Defect on relay or major electrical component
A: Overload
B: Bad wiring (wrong)
D: water in photocells (bad installation)
E: a photocell was connected before
but not removed (disconnected)
Remedy
Cables not wired or badly connected.
Check terminals precisely. Consider wire lengths
Progamming travel distance failed because the gate never
reached the limit switch GATE CLOSED. Repeat programming
the travel distance according to instructions
Progamming travel distance failed because the gate never
reached the limit switch GATE OPEN. Repeat programming
the travel distance according to instructions
A: Button P1 was pressed too often during "Programming Travel
Distance Advanced"
B: The control board has never been programmed
A: Gate to heavy or rough running
B: Gate blocked / or rough running at a certain position
C: Gate not balanced
D: Faulty mechanical installation
All: consult gate dealer/specialist
A: remove obstacle
B: check alignment
C: check terminals and wire diameter
refer to 6x blinking
A: check wires and wiring
B: check basic setting of control board (jumpers)
A: remove obstacle
B: check wires, wiring and 8.2kOhm resistor
C: check basic setting of control board (jumpers)
A: check terminals/connections
B: consult dealer/specialist
C: charge battery min. 24h
Replace contol board
Replace logic board
Check wiring
Reprogram the travel distance from gate fully closed