Dolphin Nautilus CC Plus

The Nautilus CC Plus is the robot most people start with in the Dolphin range, and the one Maytronics sells on its US store now is the Wi-Fi version, 99996409-PCI, at $749. Maytronics rates it for in-ground pools up to 40 feet, cleaning the floor and walls on a two-hour cycle, with the MyDolphin Plus app, a weekly timer, and a one-year warranty.

What it does not do

Two lines in Maytronics' specification table are worth reading before anything else, because they are the two most often assumed:

• Waterline scrubbing: No. Maytronics lists its coverage as floor and walls.
• Maximum pool length: 40 feet. Not 50.

If a pool needs either, Maytronics' own comparison on the same page points up the range: the Nautilus CC Pro at $999 is the least expensive robot in that comparison rated for 50-foot pools with the waterline, with the CC Supreme and Titan above it. All four carry one year.

The CC Plus against the Premier

Set side by side from Maytronics' specification tables:

• Maximum pool length: 40 feet, against the Premier's 50.
• Coverage: floor and walls, against floor, walls and waterline.
• Warranty: one year, against three.
• Suction rate: the same 4,500 gallons per hour on both.
• App: the CC Plus has MyDolphin Plus; the Premier has none.
• Filter: top access with an ultra-fine kit, against the Premier's bottom-load bag and cartridge.
• Default cycle: two hours, against three.
• Weight: 20.8 pounds, against 20.3.
• List price: $749, against $2,499.

Setting it up

• Keep the power supply at least 12 feet from the pool, on an outlet with a ground fault interrupter. It is splash-proof, not waterproof, so never put it in water.
• Lay out only the cable it needs to cover the pool, straight along the side, with no twists or kinks.
• Put the robot in the water before plugging the power supply in. Maytronics' manual says not to plug in first.
• If it has combined or Wonder brushes, squeeze them in the water until they are fully wet, or it may not sink.
• Plug the floating cable into the power supply, plug the power supply into the outlet, and switch it on.

Nobody should be in the pool while it runs.

Taking it out

If the cycle has not finished, switch off and unplug the power supply first. Then pull the floating cable gently until the robot reaches the surface, and lift it out by the handle. Maytronics is explicit that the cable is for bringing it up, not for lifting it out of the water.

Cleaning the filters

Unplug the power supply. Take the filter elements out, clean them, and reassemble them with the locating tabs at the bottom of each element in their grooves on the base frame, then close the S clip. The elements have a grooved end fitting and an octagonal end fitting, and Maytronics says not to force them into place.

It also recommends rinsing the brushes with clean water after every cycle.

The impeller

Unplug the power supply, take off the impeller cover, clean around the impeller housing and put it back. A blocked impeller is the first thing Maytronics checks when the motor will not run.

When it is not cleaning properly

• Cable twisting or coiling: check for obstructions, take excess cable out of the pool, clean the filter, and lay the cable straight in the sun from time to time.
• Moving in circles, or missing parts of the pool: check the moving parts for foreign objects, clean the filters and close the filter doors, and let out enough cable to reach the whole pool. At the start of a season, brush algae off the floor and walls before the first run.
• Not sinking: soak the combined or Wonder brushes.
• Motor not working: check the impeller and the drive for blockages, then the power source. If the power is fine, it goes to a dealer.
• Flipping onto its side: clean the filter.

Maytronics' water limits for it are chlorine up to 4 ppm, pH 7.0 to 7.8, 43°F to 95°F, and salt up to 5,000 ppm.

Storage

Coil the cable and store the robot somewhere cool and dry, out of direct sunlight, excessive heat and frost.

What Maytronics does not publish

• A parts diagram. Maytronics lists 17 spare parts for the CC Plus on a parts page for this robot, from the power supply and impeller to tracks, brushes and filter panels, but publishes no exploded diagram showing where they go.
• A model-specific manual. The manual served for this part number is Maytronics' universal instructions, which do not mention Wi-Fi or the app, and the quick guide link returns an empty file.
• US warranty terms, which Maytronics' US terms of sale point to at a link that reads "[LINK]".

The warranty, and the listing you buy from

Maytronics lists one year. A retailer listing may say something else — the one this site's roundup links advertises 30 months — and without published terms from Maytronics, the listing's own wording is the thing to keep. Register the robot, keep the invoice with its date and serial number, and expect a claim to go through an authorized Maytronics dealer in the country where you bought it.