POOL CLEANER TYPESTHE IGARDEN GLOSSARY

Robotic Pool Cleaner

Learn how robotic pool cleaners work, including filtration, navigation, pool surface compatibility, operating depth and maintenance in Australian conditions.

Updated 2026-10-28

Technical Definition

A Robotic Pool Cleaner is a self-contained, low-voltage electromechanical device that uses onboard traction, active brushing, water circulation and filtration to remove debris from pool surfaces. Unlike Suction-side Pool Cleaners and Pressure-side Pool Cleaners, it operates independently of the pool’s main circulation plumbing and filtration circuit.

Mechanical Architecture & Working Principles

A robotic pool cleaner integrates a drive system, debris agitation mechanism, hydraulic circuit, filtration assembly and electronic control system into a submerged unit. Each subsystem performs a defined function during the cleaning cycle.

Drive System and Traction

The drive system converts electrical energy into controlled movement across the pool floor, walls and, on compatible models, the waterline. Typical designs use two traction motors, geared transmissions and rubber tracks or drive wheels to maintain contact with the pool surface.

A Brushless DC Motor provides electronically controlled rotation without conventional mechanical brushes inside the motor. Motor architecture varies by model, and not every robotic cleaner uses brushless motors or a planetary gearbox.

Traction depends on the combined friction generated by the tracks, brush contact and pool coating. On steep walls, the cleaner must maintain sufficient grip while its pump continues drawing water through the filtration system. A clogged filter reduces hydraulic flow and can impair wall-climbing performance.

Impeller Hydraulics and Debris Collection

The pump motor drives an Impeller that creates a pressure differential across the cleaner's hydraulic circuit. Water enters through the intake, passes through the filter assembly and exits through the discharge ports.

This flow transports suspended debris into the filter basket; it does not create a sealed vacuum against the pool surface. Active brushes loosen adhered dirt and biological deposits so the moving water can carry the released material into the intake.

Australian cordless robotic cleaner specifications provide practical examples of the range between products. Published InverX models specify pump flow rates of approximately 166–366 L/min, equivalent to 9,960–21,960 L/h. These are model-specific ratings rather than a universal performance standard.

Brush Material and Surface Agitation

The brush assembly removes adhered debris by mechanical contact. Brush geometry, polymer hardness, foam compliance and rotational speed influence both cleaning action and surface wear.

PVC brushes: Durable polymer bristles suited to many common pool finishes. They provide general-purpose agitation and are available in different geometries for specific cleaner models.
Combined PVC and foam brushes: Combine the abrasion resistance of polymer bristles with the additional contact and grip of foam rings. Manufacturer guidance identifies combined brushes as an option for coarse surfaces such as Pebblecrete.
PVA or foam rollers: Designed for selected smooth, slippery surfaces where increased contact area helps the cleaner maintain traction. They are not interchangeable with every standard PVC brush assembly.

An active brush may rotate faster than the cleaner's forward travel speed, increasing surface contact and debris agitation. A two-times travel-speed ratio applies to particular models, not the entire product category.

Filtration and Particle Retention

Micron Filtration describes the particle-size rating associated with a filter medium. A smaller published micron rating indicates finer filtration, subject to the manufacturer's test method and whether the rating is nominal or absolute.

Australian-market robotic cleaners include standard filters rated at approximately 100–180 µm. These suit many leaves, insects, grit and other visible debris, but they cannot reliably capture all fine dust or suspended clay particles. Some models accept finer cartridges designed for sand, dust and algae.

A dual-layer filter combines a larger-particle stage with a finer filtration stage. The larger stage retains leaves and coarse debris, while the finer stage captures smaller suspended particles. The finer element also creates greater flow resistance as it accumulates dirt, making filter maintenance part of the hydraulic performance cycle.

Sensors, Navigation and Electrical Protection

Navigation systems can combine gyroscopes, infrared sensors, ultrasonic sensors, drive feedback and programmed movement patterns. These components help estimate orientation, detect boundaries and manage route coverage.

A cleaner marked IP68 has an ingress-protection rating for its designated enclosure under specified test conditions. This rating does not automatically apply to an external power supply, charging station or every electrical connection. Cabled and cordless designs also have different power architectures: cabled units typically receive low-voltage DC from an external supply, while cordless models carry an onboard rechargeable battery.

Australian Pool Compatibility Matrix

The Australian pool market includes Pebblecrete, Fibreglass Pool Finishes, tiled concrete pools and Vinyl Liners. Surface texture affects traction, brush wear and wall-climbing behaviour, while cleaner geometry and drive design determine how effectively the machine maintains contact.

Pool surface	Traction characteristics	Brush wear	Wall-climbing slip risk	Engineering selection
Pebblecrete	Coarse aggregate creates an irregular contact surface; traction depends on track compliance and aggregate exposure	Higher for foam-only rollers exposed to abrasive aggregate; PVC and combined brushes are common alternatives	Low to moderate on compatible, reasonably uniform walls; higher where exposed stones and abrupt transitions disrupt contact	Select a cleaner approved for rough concrete finishes. Prefer an OEM-approved combined PVC/foam assembly where specified.
Fibreglass	Smooth, curved surfaces require consistent track contact and stable movement through transitions	Generally low on an intact, smooth gelcoat surface	Moderate on steep walls if the drive system loses grip or the brush assembly is unsuitable	Use the manufacturer's approved non-abrasive brush and verify that the cleaner supports the pool's curves and wall geometry.
Concrete tile / fully tiled	Textured tiles offer more mechanical grip; polished or glazed tiles offer less	Low on smooth tiles for suitable brushes; abrasive joints or rough finishes increase wear	High on very smooth or slippery tiles when the installed brush assembly lacks sufficient grip	For smooth, slippery tiles, select a model with manufacturer-approved foam or PVA brushes. Use suitable PVC or combined brushes on textured finishes.
Vinyl liner	Smooth liner surfaces provide limited mechanical keying; folds and seams can interrupt movement	Low with a compatible brush, but damaged or unsuitable components can abrade the liner	Moderate to high on steep walls, especially where the cleaner cannot maintain continuous contact	Choose a model explicitly rated for vinyl liners, with non-abrasive contact surfaces and track geometry suited to the pool.

Compatibility principle: Track traction and brush wear are related but separate engineering variables. A brush that improves wall grip can wear rapidly on an abrasive finish, while a durable brush can still slip on polished tile. Manufacturer guidance supports PVC brushes for many finishes, combined brushes for coarse Pebblecrete-type surfaces and foam brushes for selected slippery surfaces.

Operational Thresholds & Edge Cases

Water Depth and Tanning Ledge Compatibility

The operating depth of a robotic cleaner is measured from the pool floor to the water surface at the machine's operating position. It must be distinguished from the total structural depth of the pool.

Full-size cleaners commonly specify a minimum operating depth of approximately 400–500 mm. For example, the Maytronics Mass 11 specifies a minimum depth of 400 mm, while the Beatbot AquaSense Pro specifies a working depth beginning at 500 mm. These figures describe the named models, not an industry-wide minimum.

A Tanning Ledge or splash deck commonly has less than 300 mm of water above the finished surface. At that depth, a conventional cleaner may not enter the area, may turn away from the shallow transition or may be unable to maintain its intended movement pattern.

Measured water depth	Engineering implication
Below 200 mm	Below the published shallow-water limit of many conventional models; use only a cleaner explicitly rated for this depth.
200–299 mm	Shallow ledge coverage is model-specific. Some products advertise operation on ledges as shallow as approximately 200 mm.
300–399 mm	Selected cleaners support ledges at this depth, but units with a 400–500 mm minimum operating depth remain outside their specified range.
400–500 mm and above	Within the minimum-depth range of many full-size models, provided the floor slope and local geometry are also compatible.

For example, the Maytronics Dolphin S2000 specifies a minimum sun-ledge depth of 300 mm, while the Dolphin EON 120d advertises tanning-ledge coverage from 8 inches, approximately 203 mm. These differences demonstrate why the exact model specification must govern shallow-water selection.

Water Temperature, Chemistry and Salt Concentration

Water temperature and chemical balance influence seals, polymer components, motor performance and wall-climbing behaviour.

For models whose published operating envelope matches the Maytronics guidance, use the following limits:

Parameter	Published operating range or limit
Water temperature	6–35°C for specified Dolphin models
pH	7.0–7.8
Free chlorine	Maximum 4 ppm
Sodium chloride (NaCl)	Maximum 5,000 ppm

These are manufacturer-defined limits for the relevant products, not universal specifications for all robotic cleaners. InverX, for example, publishes a 4–35°C ideal water-temperature range for specified cordless models. At temperatures below 15°C, Maytronics notes that wall-climbing performance may be affected.

In pools using a Saltwater Chlorinator, chloride exposure can contribute to corrosion of susceptible metal parts, connector pins and exposed electrical contacts. If the cleaner's rated maximum is 5,000 ppm NaCl, operation above that concentration exceeds its published limit. Rinsing the cleaner with fresh water after use helps remove residual salt deposits.

Fine Red Dust, Gum Leaves and Gum Nuts

Australian outdoor pools can receive several distinct debris classes, including gum leaves, hard gum nuts, frangipani flowers, fine inland dust and biological debris associated with frogs and possums.

Debris class	Physical constraint	Required filtration or handling
Gum leaves and frangipani flowers	Large, flexible material can bridge the intake or cover the filter surface	Use a large-capacity debris basket and remove accumulated foliage before it restricts water flow.
Gum nuts and hard seed pods	Hard debris can lodge at the intake throat, obstruct the impeller or jam moving components	Remove oversized nuts manually when they exceed the cleaner's intake clearance. Do not assume a large basket guarantees safe passage through the pump.
Fine red dust, approximately 2–10 µm	Particle size is much smaller than the openings in standard 100–180 µm filters	Select a compatible fine or ultra-fine filter with a published rating appropriate to the target particle size.
Fine algae and settled organic residue	Material can pass through a coarse filter or accumulate rapidly on a fine element	Use the appropriate fine-filter assembly and clean it frequently enough to preserve hydraulic flow.
Frog and possum debris	Organic material can load the basket rapidly or obstruct the intake	Remove substantial organic debris with a net before running the cleaner.

A 100 µm filter rating is much coarser than a 2–10 µm particle range. Switching to a finer filter is therefore a filtration requirement, not simply a change in cleaning duration. The filter's published rating and test method determine expected capture performance; a nominal rating should not be treated as an absolute particle-size cut-off.

The intake opening and impeller clearance govern whether a hard object can physically enter the hydraulic circuit. Filter micron ratings do not define the maximum size of an object that the cleaner can ingest.

Waterline Geometry, Beach Entries and Pool Transitions

A Beach Entry introduces a gradual change in water depth rather than a vertical wall. If the cleaner reaches a section shallower than its operating limit, it may lose buoyant support, encounter excessive resistance or reverse direction.

A Variable Speed Pump is part of the pool's circulation system, whereas a robotic cleaner generally operates with its own circulation pump. Changing the main pool pump's speed does not directly increase the robot's onboard pump output.

Wall-climbing performance also depends on filter restriction, surface friction, water temperature and the geometry of the floor-to-wall transition. A clean filter and compatible brush assembly help preserve the manufacturer's intended hydraulic and traction performance.

Lifecycle, Maintenance & Failure Modes

Australia's high UV exposure, outdoor storage conditions, saltwater pools and frequent organic debris create distinct maintenance demands for robotic cleaners.

Component	Typical failure mode	Physical cause	Maintenance response
Tracks and drive wheels	Track stretching, cracking, loss of grip or uneven movement	Polymer ageing, abrasion, prolonged UV exposure during storage and mechanical wear	Inspect track tension, tread condition and wheel alignment; replace worn components with compatible parts.
PVC brushes	Worn bristles or reduced agitation	Repeated contact with rough Pebblecrete, grit and abrasive debris	Inspect bristle deformation and replace the assembly when it can no longer maintain effective surface contact.
PVA foam rollers	Hardening, tearing or loss of grip	Abrasive contact, material ageing and unsuitable use on rough finishes	Reserve foam rollers for compatible surfaces and replace damaged or hardened rollers.
Filter basket and cartridges	Restricted hydraulic flow or damaged filter media	Fine dust, algae, oily leaf residue and excessive debris loading	Empty and rinse the filter after each cycle; inspect the filter media for tears and permanent blockage.
Impeller and intake	Reduced flow, obstruction or failure to rotate freely	Gum nuts, hair, leaves and other debris entering the hydraulic circuit	Isolate the power supply before clearing the intake and impeller according to the service procedure.
Cable and swivel	Cable twisting, intermittent operation or swivel stiffness	Repeated torsion, trapped grit, hair and mechanical wear	Inspect the cable sheath and swivel; remove contamination before it causes persistent binding.
Seals and electrical contacts	Moisture ingress, corrosion or intermittent connection	Seal ageing, chemical exposure, trapped salt residue or damaged connectors	Inspect seals and connection points; rinse and dry exposed parts as directed by the manufacturer.
Cordless battery	Reduced runtime or charging capacity	Repeated charge cycles, elevated storage temperatures and battery ageing	Use the specified charger, follow the manufacturer's storage charge instructions and replace the battery through the approved service process.

Cable, Swivel and Water Ingress

A cable swivel reduces accumulated cable twist by allowing relative rotation between cable sections. Sand and fine grit can increase friction in the swivel, while repeated twisting can stress the cable sheath and internal conductors.

The IP68 rating applies to the specified equipment enclosure and test conditions. External power supplies and charging stations require their own environmental protection, and submersible equipment must never be charged or serviced contrary to its instructions.

Cordless Battery Degradation

Cordless pool cleaners typically use rechargeable lithium-ion batteries, but battery chemistry is model-specific. LiFePO4 is a particular lithium-ion chemistry and should be named only when confirmed by the product's technical documentation.

Runtime gradually declines as the battery ages. Repeated cycling, excessive heat and unsuitable storage conditions can accelerate capacity loss. Battery health should be evaluated against the cleaner's original rated runtime and charging behaviour rather than an assumed universal cycle-life figure.

Routine Maintenance in Australian Conditions

After a cleaning cycle, remove the filter basket and rinse accumulated leaves, fine dust and organic residue. Inspect the impeller intake for hard seed pods, check the brushes and tracks for wear, and remove salt deposits from exposed surfaces using the manufacturer's approved cleaning procedure.

Store the cleaner and its external electrical equipment away from direct sunlight, standing water and excessive heat. Where the equipment uses a removable battery, follow its specified charging and storage instructions rather than leaving the battery fully discharged for extended periods.