Hayward AquaNaut User manual

Hayward AquaNaut
® ®
Troubleshooting Guide
Copyright 2015 Hayward Industries Inc.

Table of Contents
Safety Precautions………………………………… ………..Page 1
Two Wheeled vs. Four Wheeled Versions……….………..Page 2
RPMs ………………………………………………. ………..Pages 3 - 4
Checking for obstructions in cleaner…………...................Pages 5 - 7
Cleaner does not move…………………………………….. Page 8
Cleaner moves too slow / Right wheel doesn’t turn……... Page 9
Right wheel skips / Cleaner hose coiling…………………. Page 10
Cleaner not cleaning entire pool……………………………Page 11
Cleaner climbing too high…………………………………...Page 12
Cleaner floats / Turbine vanes pop out…………………… Page 13
Wheels are wobbly / cleaner falls on its side…………….. Page 14
Changing the turbine hub…………………………………...Pages 15 - 20

•Never use your hand to verify the amount of vacuum
at the skimmer or dedicated suction line.
•Keep hands and fingers away from the access cover
and any moving part while the cleaner is operating.
•Never operate the cleaner with people or pets in the
pool.
•Never operate the cleaner unless cleaner is
submerged under the water.
•A dedicated suction line should have a Vac Lock
installed for safety.
Safety Precautions
Page 1

Two Wheeled Version (200) vs. Four
Wheeled Version (400)
An easy way to determine which model is recommended for a given pool is to
imagine a 40’ long pool. If the suction port or skimmer is half way from one end, then
the 2 Wheel model will be the right one.
If the suction port is all the way at one end or you have a very deep end (diving pools)
the 4 Wheel model would be better suited for the pool.
The 2 Wheel unit comes with 33’ of hose (9 vacuum and one leader hose). You can
safely add two lengths of hose if needed. The 4 Wheel unit comes with 40’ of hose
(11 vacuum and one leader hose). You can add quite a few lengths to it, but at some
point there will be two problems. 1) the hoses will outweigh the cleaner and 2) the
more hoses you add, the more suction is lost to the head.
The 2 Wheel has a steering cam that makes it turn 5 times in a cycle. So it turns more
often to cover an average sized pool. The 4 Wheel has a cam that makes only 3
turns, so that the unit goes straight longer in order to cover a larger pool.
A 2 Wheel unit that needs more straight run can replace the 2 Wheel Cam
(PVXH036009) with a 4 Wheel Cam (PVXH010009).
Page 2

RPMs
The most common problem is that the cleaner is not getting enough suction, or is
getting too much suction, which causes improper wheel speed.
Common symptoms of HIGH RPMs would be:
•Cleaner is falling on its side (this can also be floats on leader hose missing).
•Cleaner is doing wheelies and tipping backward.
•Cleaner is slipping a little because it can’t pull the hose fast enough.
•Cleaner climbs out and sucks air constantly (this can also be worn tires).
•Cleaner is not covering pool.
Common symptoms of LOW RPMS would be:
•Cleaner is not covering pool.
•Cleaner gets stuck in corners or hangs up on objects in the pool.
•Cleaner is falling on its side (this can also be floats on leader hose missing).
•Cleaner starts and stops. The rpms are so low that the friction from the floor
stops the cleaner.
•Hoses coil (this can also be the swivel on the head is dirty).
Page 3

Step 1: Looking from the rear of the cleaner with the cleaner under water,
count how many times the right front wheel hump turns around in one minute.
Wheel RPM should be between 11 and 14.
RPMs
Step 2: If the wheel RPM is not between 11 and 14, the suction to the cleaner
must be adjusted to allow for proper operation.
Page 4

Checking For Obstruction in Cleaner
Step 1: Rotate the Right
front wheel forward. If it
doesn’t move, there’s an
obstruction. Do not
attempt to turn Left
wheel.
Step 2: Remove the
two screws that hold the
Handle.
Step 3: Remove the
Handle.
Page 5

Checking For Obstruction in Cleaner
Step 4: Remove the
screw that holds the
Shroud.
Step 5: Remove the
Shroud.
Step 5: Visually inspect the
cleaner and remove any
debris found in the Turbine,
Reduction Gears, Wheel
Hubs, etc.
Page 6

Checking For Obstruction in Cleaner
If the cleaner has something stuck in it, the right front wheel will not turn.
If the wheel turns but ratchets, something is worn or broken.
Parts that need to be inspected include:
Wheel Hub
(PVX051-236) Front Drive Assembly ( right
drive PVXH019SA and
steering slide Steering
Assembly PVXH011SA)
Large Drive Gear
(PVXH007)
Page 7

Cleaner Does Not Move
•The pump may be turned off or on low speed. Make sure the pump is ON.
•The three way valve may be in the wrong position. If you have a designated suction port,
divert suction away from your skimmers or main‐drains to the suction port. If you are using
the skimmer, divert suction away from the main‐drain to the skimmer.
•The system may be dirty. The filter may be dirty, and or the skimmer baskets
may be full. Clean and backwash the filter, clean the pump strainer basket.
•The pump may not be primed. Make sure the pump is primed.
•You may have a suction leak. Check for leaks in the system. (Bubbles in the returning
water). Fix the leak. Usually O‐ring on pump lid, water level too low, or plumbing leak.
•Make sure the vacuum hose is free from debris and leaks.
•Check if pump impeller is blocked
•Obstruction in the cleaner itself.
•Turbine vanes in the cleaner are in the wrong direction. Make sure the turbine vanes are in
the right direction.
Page 8

Cleaner Moves Too Slow (low RPMs)
•If using a multi-speed pump, make sure the speed setting is correct.
•Clean and backwash the filter, also clean the pump strainer basket.
•Make sure the vacuum hose is free from debris and leaks.
•Check if pump impeller is blocked.
•Low wheel RPM (insufficient flow) After adjusting, if it is still below 11
RPM, your pump may not be strong enough.
•Obstruction in the Cleaner itself. Clear the obstruction.
Right Wheel Does Not Turn By Hand
•There could be a problem or obstruction in the cleaner, either in
the turbine vanes or the gearing. Clear the obstruction.
•Turbine vanes could be worn. Replace turbine vanes.
Page 9

Cleaner Hose Coiling
•The hoses may have been stored in a coiled position. Lay them straight in the
sunlight. If that doesn't work, replace that section of hose.
•Dirt in the swivel cone. (Swivel on the head of the cleaner). Although the swivel is
self‐cleaning there may be excessive debris. Remove any debris. It is helpful to
place the swivel under a running tap while twisting to clean.
•Leaf Canister in wrong place. If using a leaf canister, make sure it’s located between
the 1st and 2nd hose sections from the pool wall.
•Leader hose is kinked. If the cleaner was put on the deck with the hoses attached to
it, then the leader hose may have a kink in it.
•Wheel hub (PVX051-236) and/or Large Drive Gear (PVXH007) and/or Steering
Bracket Roller Assembly (PVXH011SA) and/or Shaft Bearing Assembly
(PVXH019SA) worn or damaged
Right Wheel Skips When Turned By
Hand
•Wheel Hub (PVX051-236) and/or Shaft Bearing Assembly (PVXH019SA) may be
worn or damaged.
Page 10

Cleaner Not Cleaning Entire Pool
•The vacuum hose is too short. The hoses must be one to two lengths
longer than the farthest point from attachment.(See manual)
•The float(s) may be in the wrong position. The Float(s) should be 20”‐25”
from the gray cuff (head of the cleaner) (See manual).
•The hose cone swivel may be blocked. Although the swivel is
self‐cleaning there may be excessive debris. Remove any debris. It is
helpful to place the swivel under a running tap while twisting to clean.
•Pool return fittings may be pushing the cleaner. Make sure return fittings
are pointed DOWN. (See manual)
Page 11

•Too much suction (flow). Decrease the suction to the cleaner
to lower the RPMS.
•The tire treads may be worn and/or the skirts maybe worn,
hence increasing the suction under the machine. See below
for how to check tire wear.
•Need to regulate flow. May need a bypass valve or need to
adjust auto skim plate.
Cleaner Climbing Too High
Note: The tires must
be replaced when
they are worn down
to or past the tread
wear indicators.
Page 12

Cleaner Floats Or Comes Out Of Suction
Outlet When Pump Turns Off
•Air in system. When the pump shuts off the air
goes towards the path of least resistance and pops out the
hose from the suction outlet. Fix the air leak. Usually O‐ring
on pump lid or fitting on inlet to pump.
Turbine Vanes/Blades Pop Out Of
Turbine
•Vanes may be installed in the wrong direction.
•Wrong side of vane in the turbine hub. Large elliptical side
should be in turbine.
•Turbine Hub worn. Replace turbine.
Page 13

Cleaner Wheel(s) Are Wobbly
•Wheel Hub Bearings may be worn and need replacement.
•The vacuum hose is too short. The hoses must be one to
two lengths longer than the farthest point from attachment.
(See manual)
•The float may be in the wrong position. Adjust float to be
20”-25” from the gray cuff.
•Return fittings pushing cleaner. Point them down.
• Unit doesn’t have enough suction. Check Wheel RPM and
adjust accordingly
Cleaner Falls On Its Side And Takes Too
Long To Recover
Page 14

Changing The Turbine Hub
Step 1: Remove the two front wheels by removing the insert clips that hold the wheels to
the axle, then slide the wheels away from the body.
Page 15

Changing The Turbine Hub
Step 2: Remove Handle screws and
handle. Then remove Shroud screw. Step 3: Remove Shroud assembly.
Step 4: Remove steering slide assembly
(left) with shaft and 2 springs. Step 5: Remove Shaft Retainer by
lifting up with flathead screwdriver.
Page 16

Step 7: Remove turbine hub
and replace with new turbine
hub.
Changing The Turbine Hub
Step 6: Remove stainless steel shaft from left to
right by tapping a screwdriver on the shaft with a
rubber mallet until the shaft comes through on
the right side.
Left Side
Page 17

Changing The Turbine Hub
Step 9: Insert steering slide assembly
through the turbine hub, then through the
three gears and cam.
Step 8: Re-Install shaft from right to left.
Page 18