Hayward Robotic Cleaner Troubleshooting Guide
Robotic Cleaner Quick Facts
- Models covered: TigerShark, TigerShark QC, SharkVac, AquaVac, E-Vac
- Power supply output: 24 VDC (21–25 VDC acceptable range)
- GFCI required: Yes — always connect to a GFCI-protected outlet
- Motor assembly: Sealed, water-cooled — not field-serviceable, only replaceable
- TigerShark cycle: 4 hours standard; QC models offer 90-minute Quick Clean mode
- SharkVac/E-Vac cycle: 2 hours
- Diagnostic tool: Hayward Scanner reads runtime hours, overcurrent events, and water detection events
- Flotation cord test: 0.4–0.8 ohms acceptable between each pin and wire end
Understanding How Hayward Robotic Cleaners Work
Hayward robotic cleaners — including the TigerShark, SharkVac, and AquaVac families — are self-contained electric pool cleaners powered by a 24 VDC external power supply that connects to a standard 120 VAC GFCI outlet. The power supply converts AC line power to 24 VDC and delivers it to the cleaner through a flotation cord that also serves as the electrical tether.
Inside the cleaner, there are two separate motors: a pump motor that drives the impeller to create suction for debris collection, and a drive motor that turns the drive belt and tracks for movement. The motor assembly is a sealed, water-cooled unit and cannot be internally serviced — it can only be replaced as a complete assembly.
On startup, the cleaner samples both motors for approximately 1 minute before beginning normal operation. At about 2 minutes, it begins mapping the pool and will start climbing walls during this mapping sequence. The pattern is reconfigured fresh with each use — the TigerShark has no permanently stored map.
Safety First
Always place the cleaner in the water before connecting it to the power supply. Never handle the cleaner while it is plugged in. Do not use an extension cord — the power supply must plug directly into the GFCI outlet. Never allow swimmers in the pool while the cleaner is operating.
The power supply must never enter the pool and must be kept dry and away from water spray. Keep the power supply a safe distance from the pool edge.
Before-You-Start Checklist
Before diving into component-level diagnosis, verify these items first. Most service call issues are resolved here:
- Power supply is connected to a working GFCI outlet (not a standard outlet, not an extension cord)
- Power supply On/Off switch is illuminated — a lit LED indicates power is on
- Flotation cord is fully and securely connected at the power supply end and at the cleaner's motor box connector
- The cleaner is fully submerged in the water before powering on — out-of-water detection stops the machine within a few minutes
- Filter elements are clean — a clogged filter causes the machine to lose suction, reducing wall-climbing ability and effective cleaning
- Pool has been swept and vacuumed of large debris before running the robotic cleaner for the first time this season
Robotic Cleaner Troubleshooting Articles
Not Moving at All
Cleaner powers on but does not move across the pool floor. May be a power supply issue, communication failure, or drive motor problem.
Read the GuideNot Climbing Walls
Cleaner moves on the floor but will not climb to the waterline. Covers dirty filter, pool design factors, and machine-specific causes.
Read the GuideError Codes and Scanner Diagnosis
How to use the Hayward Scanner diagnostic tool to read drive overcurrent, pump overcurrent, water detection, and communication failure events.
Read the GuidePower Supply Issues
Power supply not turning on, no output voltage, or cleaner stops shortly after starting. Covers GFCI trips, voltage testing, and cord inspection.
Read the GuidePoor Cleaning Performance
Cleaner runs but leaves debris behind, misses sections of the pool, or debris falls out when removing the machine. Covers filter, drain flaps, and navigation.
Read the GuideBrush and Track Problems
Drive belt missing cogs, tracks slipping, or brushes worn out. Step-by-step guide to inspecting and replacing the drive belt, idler pulleys, and brush rollers.
Read the GuideGetting Stuck in the Pool
Cleaner gets stuck in corners, under ladders, on pool steps, or at the waterline. Covers handle position, pool obstructions, and restrictor plate installation.
Read the GuideUsing the Hayward Scanner Diagnostic Tool
The Hayward Scanner is a purpose-built diagnostic tool that reads data stored in the cleaner's onboard memory. It connects to the same flotation cord connector used by the power supply, with the power supply turned on and the power switch on the power supply in the ON position.
The Scanner reports the following metrics, all of which help identify the root cause of a service complaint:
- Motor On Time: Hours spent in the active cleaning cycle
- Power On Time: Total hours with the power switch on (includes time after cycle completion)
- Total Cycles Run: Number of times the power switch was turned on
- Out of Water: Number of times low pump motor load was detected (cleaner out of water, trapped air in filter, low voltage, or worn pump motor)
- Pump Overcurrent: Number of times the pump motor was overloaded (debris on impeller shaft, defective motor)
- Drive Overcurrent: Number of times the drive motor was overloaded (ladder obstruction, debris in belt/pulleys, defective bearings, defective drive motor)
- Water Detected: Number of times water contacted the sensor inside the motor box — continuous contact stops operation; severe water damage causes Communication Failure
If the Scanner reports Communication Failure, the three causes are: damaged power supply (check for 21–25 VDC output), water inside the motor box power connection (check seal at motor box and for breaks in flotation hose), or a damaged flotation cord (check for 0.4–0.8 ohms between each pin and wire end).