Patient lifts · Tenor family

Arjo Tenor: troubleshooting and error codes

The ServiceForge knowledge base holds 39 documented symptoms for the Arjo Tenor, with 43 ranked causes, 51 diagnostic checks with test points and expected values, and 0 error codes. Each symptom below shows its causes and the first check; the rest is one connection away. Connect ServiceForge to your AI

Symptoms

Battery low charge warning indicated

Red light on unit; battery charge insufficient for safe operation

Ranked causes

1. Battery charge depleted during use (common)
2. Regular charging intervals not followed (occasional)

First check

Verify charger light status during battery charging

Test point: Charger indicator light
Expected: Constant light during charging; flashing light when fully charged

2 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

Battery not charging

Charger connected but light does not indicate charging status; battery remains discharged

Ranked causes

1. Battery not fully inserted or clicked into charger (common)
2. Charger not connected to grounded mains outlet (common)

First check

Verify charger is plugged into grounded AC outlet

Test point: Charger main plug and wall socket
Expected: Charger main plug fully inserted into grounded outlet

1 more check with pass and fail actions, 2 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

M12 bolt worn or seized caution

Spreader bar does not move freely or excessive friction at pivot

Ranked causes

1. M12 bolt worn or deteriorated (occasional)
2. M12 bolt lacks lubrication (common)

First check

Visually inspect M12 bolt condition

Test point: M12 bolt shaft and threads
Expected: No visible wear, corrosion or deterioration

1 more check with pass and fail actions, 2 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Spreader bar loose or rattling patient safety

Movement or noise at spreader bar connection to centre section during operation

Ranked causes

1. M8 nuts loose on spreader bar attachment (common)
2. Grub screws loose (common)

First check

Measure torque of eight M8 nuts on spreader bar arms

Test point: M8 nuts retaining spreader bar arms to centre section
Expected: 40Nm (30lbf ft)
Tools: 13mm Socket and Spanner, torque wrench

1 more check with pass and fail actions, 2 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Abnormal noise or rough actuator operation patient safety

Actuator produces unusual noise or operates roughly during raise/lower cycles

Ranked causes

1. Actuator wear or internal damage (common)

First check

Operate handset or mast control switches to raise and lower actuator through full working range

Test point: Actuator during operation
Expected: Smooth operation with no abnormal noise
Tools: Handset or mast control switches

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Actuator bolts or nuts loose patient safety

Actuator moves relative to support or produces noise during operation

Ranked causes

1. Actuator top and bottom bolts or nyloc nuts loose (common)

First check

Check security of actuator top and bottom bolts and nyloc nuts

Test point: Actuator top and bottom bolts and nyloc nuts
Expected: Tight, no movement
Tools: Appropriate socket and spanner

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Actuator does not hold position when depressed button released patient safety

Jib moves from restrained position after handset button is released and hand restraint removed

Ranked causes

1. Actuator brake or load-holding mechanism failure (common)

First check

Position jib at approximately mid lifting height; lower with handset button depressed while restraining with hand

Test point: Handset button and jib position
Expected: Actuator motor stops; jib held by hand restraint
Tools: Handset

1 more check with pass and fail actions, 1 corrective action, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Actuator making contact with hoist parts patient safety

Actuator contacts hoist structure other than upper and lower installation points during operation

Ranked causes

1. Misalignment or bending of actuator or hoist frame (occasional)

First check

Visually check actuator for contact with hoist parts during raise/lower operation

Test point: Actuator and surrounding hoist structure
Expected: No contact except at upper and lower installation points
Tools: Visual inspection

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Axle bearing worn or stiff caution

Spreader bar moves with difficulty or grinding noise at bearing

Ranked causes

1. Axle bearing lacks lubrication or is worn (common)

First check

Visually inspect axle and bearing

Test point: Axle and bearing assembly
Expected: No visible wear, corrosion or scoring

2 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

Braked castors do not hold effectively patient safety

Braked castors do not prevent movement or do not engage properly

Ranked causes

1. Brake mechanism wear or damage (occasional)

First check

Test effectiveness of braked castors by attempting to move hoist with brakes engaged

Test point: Braked castor locking mechanism
Expected: Hoist remains stationary; brakes hold under load
Tools: Manual load test

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Castors damaged or not operating freely patient safety

Castors show signs of damage, deterioration, or do not roll freely

Ranked causes

1. Castor wheel wear, bearing damage, or debris (common)

First check

Visually inspect all castors and manually rotate wheels

Test point: Castor wheels and bearings
Expected: No visible damage or deterioration; wheels rotate freely
Tools: Visual and manual inspection

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Charger cannot be mounted securely to wall patient safety

Charger installation fails; charger not firmly fastened or wobbles

Ranked causes

1. Screws are insufficient for charger weight or wall type (common)

First check

Confirm wall and screw type are suitable for charger weight

Test point: Wall material and screw specifications
Expected: Screws rated for charger weight; wall type compatible with fasteners

2 more checks with pass and fail actions, 2 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Emergency stop button does not stop all power functions patient safety

Pressing emergency stop button does not render all power functions inoperative

Ranked causes

1. Emergency stop switch malfunction or electrical fault (rare)

First check

Push in emergency stop button

Test point: Emergency stop button
Expected: All power functions inoperative
Tools: Control panel inspection

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Handset or cable damaged patient safety

Handset cracked, cable frayed, or connection hook damaged

Ranked causes

1. Handset, securing hook or cable physically damaged (occasional)

First check

Visually inspect handset, hook and cable

Test point: Handset unit, securing hook, and cable assembly
Expected: No cracks, breaks, fraying or visible damage

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Hoist operates with noise or stiffness patient safety

Excessive noise or jerking motion when raising or lowering, or smooth operation lost

Ranked causes

1. Actuator internal wear or failure (occasional)

First check

Operate hoist fully and observe for noise and smoothness

Test point: Hoist raising and lowering cycle
Expected: Smooth operation with no excessive noise

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Incorrect charger being used for batteries patient safety

Customer is not using the appropriate charger for the hoist batteries

Ranked causes

1. Wrong charger selected or charger substitution (occasional)

First check

Verify charger model and battery type

Test point: Battery specification plate and charger label
Expected: Charger model matches battery type and capacity requirements
Tools: Service documentation

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Leg spread/close or overload device malfunction patient safety

Legs do not open and close smoothly or electrical overload device does not activate at extremes

Ranked causes

1. Overload device or leg mechanism wear or electrical fault (occasional)

First check

Operate handset to open and close legs through full range

Test point: Legs and overload device
Expected: Legs open and close smoothly; overload device activates at extremes of travel
Tools: Handset

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Loose front castor patient safety

Front castor has insufficient torque, may affect mobility or stability

Ranked causes

1. Front castor bolts loose or insufficient torque (common)

First check

Check torque on front castor

Test point: Front castor
Expected: 40Nm (30 lbf ft)
Tools: ST287 (19mm Crowfoot Spanner), torque wrench

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Loose front castor bracket screws patient safety

Screws retaining front castor bracket to chassis leg are loose, may affect castor alignment or stability

Ranked causes

1. Front castor bracket screws loose or insufficient torque (common)

First check

Check torque of front castor bracket screws

Test point: Front castor bracket to chassis leg
Expected: 60Nm (44 lbf ft)
Tools: ST55 (6mm Socket Allen Key), torque wrench

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Loose leg pivot bolts patient safety

Leg pivot bolts have insufficient torque, may cause instability or leg movement during operation

Ranked causes

1. Leg pivot bolts loose or insufficient torque (common)

First check

Check torque of leg pivot bolts

Test point: Leg pivot bolts
Expected: 60Nm (44 lbf ft)
Tools: Torque wrench

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Loose M8 button head cap screw (rear castor bracket) patient safety

M8 button head cap screw retaining rear castor bracket is loose, may affect structural integrity

Ranked causes

1. M8 button head cap screw loose (common)

First check

Check security of M8 button head cap screw at rear castor bracket

Test point: M8 button head cap screw
Expected: Secure
Tools: ST274 (5mm Socket Allen Key)

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Loose M8 button head screw (front castor bracket) patient safety

M8 button head screw retaining front castor bracket is loose, may affect structural integrity

Ranked causes

1. M8 button head screw loose at front castor bracket (common)

First check

Check security of M8 button head screw at front castor bracket

Test point: M8 button head screw
Expected: Secure
Tools: ST247 (5mm Socket Allen Key)

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Loose rear castor patient safety

Rear castor has insufficient torque, may affect mobility or stability

Ranked causes

1. Rear castor bolts loose or insufficient torque (common)

First check

Check torque on rear castor using extension spanner

Test point: Rear castor
Expected: 35Nm (26 lbf ft) actual applied is 40Nm (29 lbf ft) due to extension
Tools: ST302 (24mm Extension Spanner), torque wrench

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Loose rear castor bracket screws patient safety

Screws retaining rear castor bracket to chassis leg are loose, may affect castor alignment or stability

Ranked causes

1. Rear castor bracket screws loose or insufficient torque (common)

First check

Check torque of rear castor bracket screws

Test point: Rear castor bracket to chassis leg
Expected: 60Nm (44 lbf ft)
Tools: ST274 (5mm Socket Allen Key), ST55 (6mm Socket Allen Key), torque wrench

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Lower actuator support loose patient safety

Actuator support rattles or moves at mast attachment

Ranked causes

1. Lower actuator support M10 button head screws loose (common)

First check

Measure torque of lower actuator support M10 button head screws

Test point: Two M10 button head screws retaining actuator support to mast
Expected: 60Nm (44 lbf ft)
Tools: ST55 (6mm Socket Allen Key), torque wrench

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Manual override does not lower jib patient safety

Twisting the red manual override switch on lift actuator does not cause jib to lower

Ranked causes

1. Manual override mechanism jammed or not engaged (occasional)

First check

Position jib at approximately mid lifting height; operate manual system override twist switch (red switch on actuator)

Test point: Red twist switch on lift actuator
Expected: Hoist lowers
Tools: Manual override switch

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Mast support screws loose patient safety

Mast support rattles or moves relative to mast structure

Ranked causes

1. Mast to mast support screws loose (common)

First check

Measure torque of mast to mast support screws

Test point: Two mast to mast support screws
Expected: 40Nm (30 lbf ft)
Tools: ST274 (5mm Socket Allen Key), torque wrench

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Mast support to chassis loose patient safety

Mast rattles or moves excessively at chassis mounting point

Ranked causes

1. Mast support to chassis screws loose (common)

First check

Check security of mast support to chassis screws

Test point: Two mast support to chassis screws
Expected: Tight, no movement
Tools: ST274 (5mm Socket Allen Key)

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Mast support to positioning block loose patient safety

Mast support moves or rattles at positioning block connection

Ranked causes

1. Mast support to positioning block screws loose (common)

First check

Measure torque of upper mast support to positioning block screw

Test point: Upper mast support to positioning block screw
Expected: 40Nm (30 lbf ft)
Tools: ST274 (5mm Socket Allen Key), torque wrench

1 more check with pass and fail actions, 1 corrective action, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Mast to jib pivot loose or stiff patient safety

Mast does not pivot smoothly or rattles at connection point

Ranked causes

1. Mast to jib pivot bolt or nyloc nut loose (common)

First check

Check security of mast to jib pivot bolt and nyloc nut

Test point: Mast to jib pivot bolt and nyloc nut
Expected: Tight, no movement
Tools: Appropriate socket and spanner

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Plastic plugs missing from steering / push handle ends caution

Plastic plugs not installed or missing from both ends of handle

Ranked causes

1. Plastic plugs not installed or lost during use (occasional)

First check

Visually verify plastic plugs present at both ends of handle

Test point: Each end of steering / push handle
Expected: Plastic plug installed at each end

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Recoil clip loose or damaged caution

Spreader bar recoil clip rattles or does not hold position

Ranked causes

1. Recoil clip button head screws loose (common)

First check

Measure torque of recoil clip button head screws

Test point: Two button head screws retaining recoil clip
Expected: 25Nm (18 lbf ft)
Tools: 3mm Allen Key, torque wrench

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Sling damage or deterioration patient safety

Stitching, seams, fabric position compromised; plastic support clips cracked or deformed; SWL label illegible

Ranked causes

1. Incorrect laundry processes or normal wear (common)

First check

Visually inspect stitching and seams

Test point: All sling seams and stitched areas
Expected: Stitching intact, seams in good position

2 more checks with pass and fail actions, 1 corrective action, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Sling identification missing or unclear patient safety

Sling lacks proper identification or dating per service procedure

Ranked causes

1. Sling not properly identified after inspection (occasional)

First check

Confirm sling identification method

Test point: Sling serial number label or corner marking area
Expected: Sling has either serial number label or blank corner space for marking

2 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

Steering / push handle bolts or nuts loose caution

M10 bolts or nyloc nuts securing handle are not firmly tightened

Ranked causes

1. M10 bolts or nyloc nuts loose due to vibration or incomplete assembly (common)

First check

Remove four plastic caps covering bolt heads and nyloc nuts

Test point: Steering / push handle attachment points
Expected: Four plastic caps removed

3 more checks with pass and fail actions, 1 corrective action, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Steering / push handle damaged caution

Physical damage visible on steering/push handle structure

Ranked causes

1. Impact or wear damage to handle (unknown)

First check

Inspect steering / push handle for cracks, dents or deformation

Test point: Entire handle assembly
Expected: No visible damage

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Steering / push handle weld integrity compromised caution

Welds on handle structure show signs of cracking or separation

Ranked causes

1. Weld crack or separation (unknown)

First check

Visually inspect all welds on steering / push handle

Test point: Weld joints on handle
Expected: No cracks, gaps or separation visible

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Upper actuator support loose patient safety

Actuator support rattles or moves at jib attachment

Ranked causes

1. Upper actuator support M10 button head screws loose (common)

First check

Measure torque of upper actuator support M10 button head screws

Test point: Two M10 button head screws retaining actuator support to jib
Expected: 60Nm (44 lbf ft)
Tools: ST55 (6mm Socket Allen Key), torque wrench

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Wear or damage to actuator installation points patient safety

Upper or lower actuator installation bolts or holes show signs of wear, deformation, or ovality

Ranked causes

1. Bolt hole oval or worn installation points (occasional)

First check

Visually inspect upper and lower actuator installation points

Test point: Installation bolts and bolt holes
Expected: No wear, deformation, or oval bolt holes
Tools: Visual inspection

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Community

0 fixes logged by technicians through their AI, with outcomes, for this model.

ServiceForge knowledge base record. Field-unverified unless technicians confirmed it. A teaching summary of the record, not a service manual. Export 2026-10-14.