Preventive Maintenance and Inspection Guidelines for FAAC 844 R 3 PH

Lubrication and Oil-Bath Fluid Management

The FAAC 844 R 3 PH gearmotor relies on complete, continuous oil-bath submersion to protect its internal mechanical components and twin-disk clutch from thermal and frictional wear. Scheduled preventive maintenance must include regular level checks of the FAAC OIL XD 220 fluid. Because the unit operates under heavy commercial and industrial duty profiles—supporting up to 70 cycles per hour (70% maximum use frequency)—maintaining proper oil volume is essential. The total weight of the gearmotor filled with oil is 15 kg. Any significant reduction in weight or visible loss of lubricant indicates an integrity issue that requires immediate inspection of the gaskets and the pressure-cast aluminium half-body joints.

During lubrication checks, verify that the FAAC OIL XD 220 fluid remains free of metal shavings, debris, or moisture ingress. If the fluid appears degraded or contaminated, drain the housing entirely and refill with genuine FAAC OIL XD 220 to ensure the internal reduction gearing (1:30 ratio) and drive components remain fully submersed. Ensure that the ABS outer cover and housing seals are reseated accurately to maintain the IP 44 environmental protection rating.

Twin-Disk Anti-Crushing Clutch Calibration

The operator features a mechanical twin-disk anti-crushing clutch operating in the oil bath, providing an adjustable torque output from 0 to 62 Nm. Periodic calibration of this clutch ensures continuous site safety and prevents premature motor strain. Calibration is carried out mechanically using a standard hexagonal key on the clutch adjustment mechanism.

Inspect the clutch settings quarterly or semi-annually depending on operational intensity. If gate movement exhibits slippage or if crushing force thresholds exceed facility specifications, adjust the hexagonal screw to re-establish the correct operational torque. Maintaining precise clutch calibration ensures that the 950 W motor does not draw current above its rated 2.5 A under standard transit conditions, especially when driving heavy structural gates up to 2,200 kg with a Z12 pinion or 1,600 kg with a Z16 pinion.

Limit Switch, Foundation, and Mechanical Drive Checks

Routine service protocols must verify the inductive limit-switch assembly and target plates:

• Inductive Limit Switch: Inspect the sensing face and steel target plates for physical damage, clearance variance, or debris accumulation. Ensure the inductive switch reliably signals the dedicated FAAC 844 T control board at end-of-stroke travel limits.
• Pinion and Rack Alignment: Inspect the Z12 (7.2 m/min gate speed) or Z16 (9.5 m/min gate speed) drive pinion teeth for uniform contact along the gate rack. Verify that the gate load rests entirely on its running track and does not exert downward vertical load onto the drive pinion.
• Foundation Anchors: Check the optional galvanised steel foundation plate. Ensure the side and height adjustment hardware remains torqued to prevent vibration or gear misalignment.

Manual Release and Enclosure Servicing

Because the 844 R 3 PH is a non-reversing electro-mechanical screw gearmotor, it provides positive mechanical locking when stationary without supplemental electric locks. Routine checks must include testing the lever-operated manual release mechanism using the supplied coded key. Verify that the release lever disengages smoothly to allow manual gate transit during power loss, and relocks firmly upon closing the lever.

Clean the exterior ABS protective cover and the cataphoresis-treated aluminium lower and upper half-body housings. Inspect cable entries, gland seals, and three-phase 400 Vac (+6% -10%, 50/60 Hz) wiring terminations leading to the external FAAC 844 T microprocessor control panel. Confirm that temperature limits remain within the rated -20°C to +55°C operating envelope.