FAQ
TL;DR: 35 000 duty cycles logged in 8 years prove the CDM9 drivetrain is long-lived, yet “blinking red LEDs are normal” [Elektroda, damek_2009, post #16172899] and most faults trace to sensors or a single 470 µF capacitor [Elektroda, dakin11, post #19951300] Follow the three-button reset to clear auto-close. Why it matters: fixing these parts restores 100 % motor function without €800 boards.
Quick Facts
• Supply: 230 V AC in, three-phase 230 V to stator via inverter [Elektroda, lz11980, post #16173259]
• Service counter: 20 000 / 50 000 cycles – DIP S1:1 OFF/ON [Elektroda, doortech, post #20451477]
• Auto-close timer: 1-900 s set by T1 with S2:7 ON [Elektroda, doortech, post #20451477]
• Error E24 = power loss & lost position; open once to clear [Elektroda, waldek418, post #19951383]
• Common failure: dried 470 µF cap → burnt R3/R4/T1/T2 on inverter [Elektroda, dakin11, post #19951300]
Why does the motor stay idle when I press Up/Down?
The Hall-effect disengagement sensor (marked A 20E 0948 049A) may not see the clutch magnet. If the magnet is missing or weak the drive blocks all motion. Test by moving an external magnet over the sensor: the motor should run both ways [Elektroda, lz11980, post #16177980]
How do I remove the inverter board safely?
- Isolate mains. 2. Undo two Torx/Allen screws on the motor housing that clamp the heatsink. 3. Gently prise the white plastic latches and slide the PCB out [Elektroda, damek_2009, post #16172899]
How do I program the travel limits from scratch?
Three-step quick routine: 1. Door 1.5 m above floor, SW1 ON. 2. Hold Down until bottom seal sits 1 m above floor, squeeze seal once (LEDs D4 & D5 blink). 3. Press Down again; door learns close and open path, then switch SW1 OFF [Elektroda, doortech, post #20451477]
What does error E24 mean and how do I clear it?
E24 appears after any power failure; the controller forgets position. Press Open once: the door travels fully open, hits buffers, and normal mode resumes [Elektroda, waldek418, post #19951383]
How can I disable or enable automatic closing?
Hold STOP, then simultaneously press UP + DOWN for 6 s. Release when the dot on the display toggles. Dot off = auto-close disabled; dot on = enabled [Elektroda, waldek418, post #19419101]
How do I adjust motor torque if learning fails?
- Power OFF, set SW2 ON. 2. Power ON, toggle SW1 ON then OFF. 3. Hold STOP and tap UP once to increase force or DOWN once to reduce. 4. Switch SW2 OFF. Each tap changes one of 15 steps; factory default is step 9 [Elektroda, doortech, post #18948523]
Can I reverse the motor’s direction by swapping wires?
The CDM9 inverter synthesises three phases; simply swapping stator leads reduces torque and triggers faults [Elektroda, lz11980, post #16213494] Direction change requires firmware and is not field-configurable; relocate the motor instead [Elektroda, lz11980, post #16253822]
How do I clear E08 (emergency stop) that appears randomly?
Inspect every NC stop loop: X7-2/3, X2-3/4, X3-1/2, X4-1/2. A broken keyboard ribbon or wet stop switch often opens the loop, latching E08 until the circuit is closed and power recycled [Elektroda, doortech, post #20346372]
What causes inverter boards to burn R3/R4/T1/T2?
A dried-out 470 µF electrolytic capacitor spikes voltage, shorting gate drivers and resistors. Replacing the capacitor and the damaged components restores full operation [Elektroda, dakin11, post #19951300]
Which component is C603 (GP137) on the power PCB?
C603 is actually a 6.8 V Transient Voltage Suppressor, type SM6T6V8A; it protects logic rails from surges [Elektroda, chucu, post #20822086]
Is it safe to bypass the controller and feed 230 V directly to the motor?
No. The motor relies on the onboard inverter and clutch sensor. Direct mains would stall the rotor and damage the gearbox [Elektroda, doortech, post #21306408]
Can I replace the pneumatic bottom edge with opto-sensors?
The ECS930/940 needs an extra daughterboard for optical edges. Kits exist but cost more than a calibrated pneumatic switch, which already meets EN 12453 impact limits [Elektroda, doortech, post #21475652]
How do I reset the service light or cycle counter?
Crawford’s handheld programmer is required; the counter (20 000 or 50 000 cycles) cannot be reset from the keypad [Elektroda, doortech, post #20381421]
What statistic shows long-term reliability?
Six gates logged over 35 000 cycles in eight years with only capacitor replacements needed [Elektroda, dakin11, post #19954599]
What edge-case can brick the controller?
Removing HC14NG (IC5) while powered temporarily clears E14 but leaves the encoder uninitialised; the motor stops responding after minutes [Elektroda, carla, post #20384972]
