Dolphin Troubleshooting for Your Maytronics Robot

Dolphin Troubleshooting is simple. Don't even bother taking apart the motor compartment. Besides having many many screws, you just can't get replacement parts so save your time.

Help has arrived!

Aquaquality Pools and Spas, Inc is now a dealer and service provider for Dolphin Pool Cleaners and Tiger Shark Pool Cleaners. 1-866-876-8643




Wet Transformer, Wet Power Supply. How to fix it.

If Your Maytronics Dolphin Stops

If your robot stops moving, you MUST shut it down until the problem is corrected. Failure to do so may burn out your drive system.

You MUST check for toys or other objects such as acorns that may be stuck in the drive track causing it to stop.


YOUR TRANSFORMER TIMER MAY BE BAD

Maytronics Dolphin Drive Track


This is the best advice I can give you. Remove every last item from your pool before cleaning with your Dolphin. The smaller the object, the more important it be removed prior to cleaning.

These little things can get stuck behind the sideplate and jam the drive system causing irreversible electrical damage.

Prevention is key to your robots health because if your robot breaks, you are going to pay with LOTS of down time while the robot is sent for repair.

Maytronics Dolphin Diagnostic Power Supply

The Dolphin power supply differs greatly from Aquabot. Aquabot transformers only step down the voltage to deliver A/C current to the robot. Dolphin steps down the voltage AND transforms to D/C with an internal circuit board having diodes. I believe this circuit board is one of the few user parts available.



To check your Maytronics Diagnostic power supply, use a multimeter set to 200vdc. Output voltage should be about 38 volts D/C.

A known exception, the Robo-Kleen power supply puts out about 30 volts A/C, you read correctly...A/C.

Check the label on your transformer for voltage output and type.

Maytronic Dolphin Diagnostic Transformer (opens new window)

Maytronics Dolphin Transformer

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What Other Visitors Have Said

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Maytronics Dolphin Nautilus, Timing Track 
The timing track has 1/4" more slack on one side than the other. One is nice flat the other is loose. I don't see any provision for adjustment. Any suggestions? …

Brand new out of box today, Triton Fails 
Brand new today - followed directions and placed in pool to clean. Ran for about 20 mins then shut down. Tried to restart, ran for 10 seconds and shut …

where can I buy the circuitboard? 
Machine performs perfectly, until I tried to use it for the first time since last winter. The power supply must have been either dropped or the environment …

Advantage Plus Cleaner shuts down too soon 
I have a advantage plus rc. This is my second year of use and the unit shuts down after a hour. Sometimes the full bag light comes on even though the …

Resistor Identify 
I have a Maytronics DX4 that only runs for 10 seconds and stops. I have the board out of the motor box and the resistor in position R14 is burnt to the …

Dolphin Cleaning cycles Automatic Restart 
What do you do about running the cleaner while on vacation? I don't know if this is the case with new models as mine is about 3 years old, but if I'm …

Dolphin M5 Supreme Liberty Charging Problem 
I bought a new open box Dolphin Liberty on Craigslist (not even assembled yet) and after charging is completed the Dolphin worked for two cycle only. Now …

Dolphin Runs for 15 Minutes 
I bought my Dolphin Diagnostic Advantage in May2006 i have a screened in pool so i only use it a couple of times each season at the moment it only works …

Dolphin climbs a wall and stops 
The Dolphin does not clean the floor. It goes straight for a wall and climbs it. It then stays on the wall and eventually turns off.

Stops after 30 seconds  
Stops after 30 seconds. It starts and runs around in the pool but stops. Nothing appears to be stuck in it and when I check it it does not appear to pick …

Dolphin Service  
Hello, I work in Dolphin Service for a company distributor of maytronics commercial dolphins, the company is called spear corporation and if anyone has …

My power supply will not come on...HELP 
My power supply will not come on...HELP ADMIN REPLY: Knowing the model would help. Knowing if you checked the GFI outlet and power to the outlet would …

R3 Resistor Value Dynamic Pro 
Hello Could you please to tell me the value of R3 resistor on the board of Dynamic Pro X2? Picture in attached file. Thank you Yuri ponitech@yandex.ru …

Moby Stopped, Need Help 
My Moby stops after moving for 1 second. I already measured the voltage this is 27V DC and is ok. When I open the motor compartment I see a green led …

the robot doesn't sink 
After the completion of a cycle, I took the robot out of the pool, washed the filter bag, reassembled it and put it back into the pool to make a second …

Dolphin floating cable only has 3 prongs 
I just bought a brand new Dolphin Deluxe 4. As I was about to put the connector from the floating cable into the socket on the power supply, I noticed …

Dolphin (what we call Flipper) 
I'm seeing postings about Dolphin starting up, going a few feet, reversing and going a few more feet... then just stops. Help!!! ?????

Dolphin Blowing out debris 
Why is my dolphin blowing debri out the top? ADMIN REPLY: Most likely a hole in the bag.

Constant 37vdc & won't run 
I know it sounds crazy but Im getting 37.2VDC even when the PS is not pluged in to an outlet (110VAC). Im guessing it has somthing to do with a capacitor. …

I have 37 vdc, but loses power right away 
I have the 37 vdc, but when I plug the dolphin cord in, I lose the 37v. I have to unplug main power, wait about 1 minute, plug back in and the power comes …

Dolphin Star won't climb walls 
My pool is a perfect rectangle 25ft X 12ft, shallow end is 4ft deep and deep end is 7ft. It is fully covered with small glass tiles. I got a brand new …

Dolphin stops before cycle is finished 
My Dolphin was made in 1995. Just recently it has stopped before running through its cycle for cleaning the pool. If I turn it off, wait a few seconds, …

Fuse keeps blowing out. 
I have a Dolphin Dianogontics #4 and the fuse keeps blowing out every time I put the switch on. How much is a new power supply? Is it something I can …

My Dolphin Diagnostic Sank! 
Hi! My Dolphin Diagnostic Sank! Seems like an "O Ring" failed and water get into the unit. I think motors are OK as they seem to be waterproof, but …

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Dolphin Pool Cleaner Sucks dont buy one. Company does not Honor Warranty 
The first one i bought wouldn't go up walls and was intermittent so i brought it back the second day and they told me they never had this problem. Well …

Dolphin Pool Cleaner won'tRun More than 30 seconds 
I have a Dolphin cleaner for our pool. Just recently it stopped working correctly. I can turn it on but it won't clean the whole pool - only about30 seconds. …

Dirt Falls From Robot Back Into Pool 
When i pull the dolphin out of the pool, dirt falls back into the pool.

Dolphin Tracks will not turn 
We just opened our pool and put in the Dolphin pool cleaner. It ran for about a minute, and then stopped moving. we checked out all the plugs and cleaned …

Dolphin HD starts and runs 2-5 seconds 
My cleaner is about 4 years old. I think the drive motor is out. is it possible to purchase a motor or what are my choices?

Dolphin Cleaner not working at all 
I just moved into a new house with an inground pool and a Dolphin. I made sure it was clean and ready to go. It looks new but when I plug it in the power …

Odd Dolphin Diagnostic behavior 
Hi, After running, cleaning and dropping the Dolphin Diagnostic back into the pool, it wouldn't start up. I pulled it out and turned it on and could …

Dolphin Pool Cleaner won't suck 
Brand new Dolphin will not suck at all. any ideas?

basic dolphin robotic cleaner - missing the bits 
This machine is great, it has cleaned my pool in 3 hours, however, it has missed a strip right down the middle of the pool. Does anyone know how to set …

MY DOLPHIN RUNS A FEW SECONDS THEN STOPS 
MY DOLPHIN RUNS A FEW SECONDS THEN STOPS...WILL NOT RESTART. IT IS ABOUT 4 YRS OLD. IT IS USED ABOUT 3 MONTHS OUT OF THE YEAR FOR ONLY A FEW HOURS A WEEK. …

Dolphin Diagnostic Transformer burns fuses 
I need help here, my Dolphin Diagnostic Transformer burns fuses. Is it the board faulty? Or is it the switch? Please help me. Thanks!

Power Cord Twists  
I have had the Dolphin Diagnostics by Maytronics for about 4 or 5 years and it seems to have lost its ability to clean as well as it used to. Now this …

always going forward,,, 
My dolphin just started this issue,, it stays in one direction all the time.. it won't reverse itself.. anybody have any idea what they think might be …

power to robot 
I have 33.9 volts to the robot but no power coming from board inside robot is this board available?

help needed - goes to same path over and over in deep end 
My dolphin always worked great but then last time i put it in my relatively large pool, once it gets to the deep end it just goes back and forth over and …

Won't reverse 
Tiger Shark operates normally in one direction, but won't reverse. Tried turning off power and allowing unit to reset, but no luck. Any help would …

Dophin Junk 
I have a dolphin pro which worked for just a month past warranty. I was told by the repair center that the motor was bad and they wanted 550. to fix it. …

PC board failed parts available on Ebay for R14,R31, R43 and M3 for the skilled electronics individual. Not rated yet
Because so many people are asking for resistor values and replacements, I have decide to make them available through Ebay if you would like to attempt …

How to repair a Maytronics Dolphin robotic pool cleaner that quits early Not rated yet
This is a long story. My Dolphin Advantage failed after infrequent use over a period of 8 years. The unit still looks almost new, not like the used ones …

If your Maytronics moves forward, then back, then stops, read this post for why it happens... Not rated yet
The Maytronics Dolphins work well...when they work. They have a fairly sophisticated internal controller the drives each of the 2-3 motors inside their …

Power Supply Not rated yet
Dolphin 4 Power Supply Unit = Diagnostic RD-DC The power supply unit does not operate. Worked fine one day and not the next Maybe 3-4 years old. …

Dolphin Stops after 5 minutes Not rated yet
Brand new m5 put in pool. Runs for 5 minutes then stops moving. Runs fine for first five minutes. Turn off turn on. Same thing.

No Power for the Dolphin Deluxe 4 Not rated yet
I tried checking the outlet and it's fine. Also moved to different outlets. Nothing. The bag is clean and the unit was working fine yesterday.

Green LED blinking inside motor box. Not rated yet
One poster stated he had same problem and found a bad resistor on the PC Board. Is that fixable or new motor time? If fixable, anyone have a web site …

old dolphin slow go Not rated yet
My dolphin was working fine the last time i used it. I cleaned it up and when i put it into the pool the next time the traction was very slow and the propeller …

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Love my dolphin Not rated yet
Dolphin vacuum works great however it was working fine yesterday today every time I plug it in my GFI trips and wont reset til vacuum is unplugged not …

why does my dolphin pool robot float? Not rated yet
last year it worked fine. this year it was fine for two weeks, the bag is clean. but it won't sink to the bottom anymore? how can i fix this problem? …

Dolphin DX4 Wion't Reach Ends of Pool Not rated yet
How can I get the Dolphin 4 to clean the ends of my pool. It is a small pool so that is not an issue. No matter how many times I move it to one end, it …

Dolphin just climbs the walls Not rated yet
Any suggestions.... My dolphin just climbs the walls!!! I've tried moving the black hands inside, out, one to left, one to right! Help please!!!!

power supply all lights are blinking Not rated yet
for the first try, dolphin woke fine for a day. next day, clean it and put it back in and all the lights are fast blinking, the power light won't come …

Dolphin robot gets stuck on wall return jets Not rated yet
Just got my Dolphin Supreme M5 today. Works well, but when climbing walls, it gets stuck on the return jets which protrude from the wall. I have swing …

Dolphin Power Supply Problem Not rated yet
I have a Dolphin that is approx. 8 years old. The power supply switch turns itself off as soon as I turn it on. The unit worked fine two days ago. Any …

Dolphin Stopped after Motor Replacement Not rated yet
Our Dolphin Supreme M4 needed a new motor. It would move a little, maybe go up a wall a bit then fall off and stop or just stop altogether. It seemed only …

DX4 Clogged Bag Light Not rated yet
I have an Dolphin 4 Deluxe. When I turn it on the clogged bag light blinks and it will not move. I have cleaned everything I can possibly clean.I have …

moby 2 year old stays in one end Not rated yet
recently purchased used. likes to stay more in one end of pool and at times does not clean entire floor. is it permitted to guide the robot to the missed …

foward for a few second then reverses Not rated yet
I put my robot in the pool for the first time this year. It goes foward for a few second then reverses for a few seconds. The fan for exhaust on the robot …

dolphin commander Not rated yet
appears to work for about 1/2 second, impeller is not spinning but belts and brush wheels are moving, what can the problem be. any trouble shooting ideas …

Woke up robot from winter sleep and wouldn't move Not rated yet
I have had the dolphin diagnostic for 8 seasons without issue. This year we powered it up, hooked up the hose and it just sat there. Would not even go …

Power source turns off  Not rated yet
After a few seconds after turning on the power source the motor starts The dolphin will go forward about a foot and then the power source shuts off …

Will Robot cause Holes in Liner? Not rated yet
New liner installed had holes on bottom shallow end only pool man said it was robot,robot fine no sharp objects, possibly liner installed improperly? …

Moisture iIn Motor Problem Not rated yet
I checked my power supply, it is fine. I opened up the grey box and found moisture inside. The problem was it would start and after less then a minute …

Power pack takes a dive Not rated yet
despite "NO diving" rules my Dolphin power pack took a dive into the pool and does not work. Will it dry out? Will it nullify any warranty if I take the …

Dolphin Power Supply Not rated yet
My dolphin will not turn on. The light did not turn on on the power supply when I push on. Any ideas?? ADMIN REPLY: Does the power supply turn on …

Clean Filters Light is ON, Unit Won't Run. Not rated yet
I only used my nautilus about 10 times and now the "clean filters" light comes on and unit won't run. The filters are clean but the motor doesn't turn …

Dolphin Stays in Deep End Not rated yet
The cleaner spends most of it's time cleaning the pool's deep end and very little time in the shallow end. ADMIN REPLY: Could be a dirty bag. Try running …

Switch problem Not rated yet
While the dolphin is plugged in, when I try to turn on the power switch, it pops back off.

Dolphin Erratic Not rated yet
Dolphin Dynamic plus four years old. Put alway last october clean. Come to house and pool and tried for first time yesterday. Found problem. Taken everything …

my dolphin model m3 only works for 30 mins and then stops  Not rated yet
my dolphin colour pale blue and yellow caps has been brilliant until recently when the following happens it works for 30 mins approx and then stops it …

Dolphin will not power off Not rated yet
The four blue lights on the power indicator will not shut off. ADMIN REPLY: On/off switch my guess

my dolphin continues to flip on its side Not rated yet
During its cycle, my dolphin just started tipping on its side or on its back. Why does it no longer stay flat on the bottom? ADMIN REPLY: That's a new …

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Dolphin Advantage On Off On Off Not rated yet
My dolphin diagnostic advantage turns on then off thin on and off three times then just sits there. Machine never moves at all. I have constant DC voltage …

Starts and Runs For Two Minutes Not rated yet
We have dismantled all parts, with the exception of the relays The machine will start and run for about two minutes. We then disconnect, start it again, …

swivel cable will not swivel  Not rated yet
cable is not swiveling, just knots up. Help rjkraemer@yahoo.com ADMIN REPLY: Call Maytronics, I have no experience with the swivel. Please come back …

Yellow Drive Belt Question Not rated yet
It has worked beautifully low these many years. However, this year it only moves in a small relatively square spot..but clean this well. Upon investigation …

blown fuse on dolphin commander Not rated yet
The dolphin commander just stopped working. I checked the fuse in the back of the power unit and it was blown. Replaced a couple of times and as soon as …

Wet Power Supply Not rated yet
HI my power supply is not performing i got the dolphin,#dl2019 out of the shed and the power pack had water in it. I let it dry in the sun fully open, …

dolphin pattern Not rated yet
I just bought a pre-owned dolphin. My old died after 10 years and i liked it so much I bought another one. But this one only wants to go to the deep end …

Just moves a few inches and stops. Same thing if I try it again Not rated yet
When I plug it in, and turn on the switch, the impeller runs for a few seconds and the unit moves forward a little bit then it stops. Any help would be …

My new dolphin DX3 does not complete the cleaning cycle Not rated yet
I bought a dolphing DX3, I have used just a 2 times. The problem is that the robot does not complete the 3 hs cycle. I works a few time and stop. So …

The Dolphin Diagnostic Advantage Power Supply Keeps blowing Fuses Not rated yet
The Dolphin Diagnostic Advantage Power Supply Keeps blowing Fuses: I looked for the fix DIY to this problem and found that the problem is either your …

Dolphin Explorer Won't Sink Not rated yet
My Dolphin Explorer worked fine when I started it up this year one time and now it won't sink......what could it be??? ADMIN REPLY: My guess would be …

Maytronics Dolphin Pump Not Working Not rated yet
I have a Dolphin pool cleaner. It turns on and the drive system works, but the propulsion fan seems to be on the fritz. When I initially plug it in it …

Just stopped! Power but no power? Not rated yet
I have a Dolphin and it has always worked great. Recently i used it to clean the pool. I turned it off to clean out the bag, I cleaned out the bag and …

Robot Power Supply Got Wet Not rated yet
I left my power supply for my robot nautilus out and it got rained on. It hasn't been able to come on since. ADMIN REPLY: When you searched this site …

My dolphin cleaner runs for a few seconds and stops. It moves for a few inches and stops again. Not rated yet
Wen I plug in and turn on the switch, the impeller runs for a few seconds and the unit moves forward a little bit and it stops. Any help is appreciated. …

Repair Facility Near NJ Not rated yet
My robot was working normal, then stop no start. power supply light is out need to replace power supply I guess I would like to know if any dealer …

voltage output Not rated yet
When the dolphin stopped working, I checked the power, & removed the cable. the cable wires were twisted together inside of the bulkhead connector, I think …

Dolphin Deluxe 4 and Drain Covers Not rated yet
Our Dolphin Deluxe 4 gets stuck on the drain covers at the deep end of our in ground pool. We had our pool renovated and also went from one flat drain …

Dolphin Diagnostic Advantage Not rated yet
I put it in the pool, turn it on, it goes forward about 10 feet, it reverses about 10 feet then moves real slow forward and stops. I took the side case …

very upset about Dolphin Pro Not rated yet
I purchased a dolphin pro at the begining of summer. I have used it a few times with no problems. Ive followed all instructions on how to operate, and …

Dolphin Pool Cleaner Starts up and then stops! Not rated yet
it starts up and moves around for a minute and then just stops! Not sure what the problem could be. Anyone???? Mary

DOLPHIN 4 (BRAND NEW) Not rated yet
FIRST OFF I'D LIKE TO SAY I CALLED LESLIE'S WHERE I BOUGHT THE UNIT AND ALTHOUGH HE LISTENED TO ME HIS AWNSER WAS VERY UNSETTLING,HE SAID CALL MAYTRONIC'S..ITS …

the on switch goes on but the cycle button isn't working Not rated yet
I push the on button and that lights up, but the cycle button does not. i have unplugged everything, tried the outlet which i fine. It was working fine …

Comprehensive Directions the "Manual" doesn't cover? Not rated yet
I've had a lemon out of the box. Purchased a Dolphin Deluxe 4 from Leslies Pool Stores in St. Louis. The original power box had the rocker panel power …

Dolphin Dynamic will not turn on Not rated yet
Used my cleaner yesterday, ran perfect. Went to use again today and it will not come in. Not sure what to do to find out why. Unit was manufactured in …

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it starts goes 5 inches , changes goes back 5 inches and stops..... Not rated yet
i just put my robot in the pool and as stated it only goes to the front for few inches , then goes back the same and suddenly stops , not moving any more........wonder …

Dolphin diagnostic power switch trips when attached to Dolphin unit Not rated yet
Had no problems with dolphin diagnostic. I changed propeller blade a few times, along with tracks but never had a problem. Just opened the pool, ran dolphin …

dolphin dx 4 not behaving Not rated yet
Hi there, when i put the dolphin into the pool and turn the switch on, it only runs for a few seconds and then shuts off. When i went to fire it up …

Dolphin power supply keeps tripping GFI switch Not rated yet
I have a brand new power supply, only used it last season for about 2 months. I've recently opened the pool and when I plug in the power supply it trips …

Dolphin Issues  Not rated yet
Dolphin PS Switch kept tripping, opened PS and found water.. Dried out all components got switch to work again, but takes a few tries before it sticks …

floating dolphin Not rated yet
just bought the cleaner. 2nd day to use. have cleaned the filter twice and 2nd time I put it in the water after, it would not go to the bottom of the pool, …

Power cable plug pins Not rated yet
I have 4 pins on my power cable...not sure which pins to check for power. Does anyone have a electrical diagram?

Dolphin runs for about 15 minutes then stops. Not rated yet
My dolphin runs for about 15 minutes then stops. If I unplug the cord from the timer and plug it back in it will run for another 15 minutes.

Not vacuuming Not rated yet
Dolphin runs :02 in an irregular pattern then stops.will run manually ,but does not vacuum in either mode.rubber seal on remote toggle switch is deteriorated …

Power Supply Overheats Not rated yet
My Power supply transformer gets very hot and blows fuses, have disconnected the robot, checked continuity on the switch, and still blows fuses, any assistance …

Blown Fuse Not rated yet
fuse broke when turn on. ADMIN REPLY: You have a short, possibly in the cable

Dolphin Starts and Stops Fix Not rated yet
When I start my dolphin sweep it goes for about 5 seconds and then stops. I plug into a differant socket and works fine. Then plug in same socket,stops. …

We have been w/out our Dolphin 4 for a month Not rated yet
The Leslies store held it for 2 weeks and now it has been out of their store for 2 weeks. They gave me the phone number to contact you and could not get …

Dolphin was found with roller off Not rated yet
Purchased my Dolphin last year 5-2010 and used it for 3 months and loved how well it worked and how much time it saved. This year after using it for 2 …

Dolphin power supply problem Not rated yet
on my yellow box power supply type: diagnostic dc model: 5204 250 w input ac 115 v 60hz output dc 29v 11a soon as flip switch …

when i turn the cleaner on, it immediately shuts back off, why is it doing that? Not rated yet
when i turn the cleaner on, it immediately shuts back off, why is it doing that?

Pool Robot Getting stuck  Not rated yet
Hey there we just had our pool installed last year the dolphin keeps getting stuck on the main drains. We never had the problem lasy year. ADMIN REPLY: …

Dolphin Diagnostic Electric Supply Problem Not rated yet
I have a Dolphin Diagnostic pool cleaner . I removed the internal plug to the motor and found that the male plug pin has burnt off . Is there any …

Dolphin commander power supply Not rated yet
I purchased a dolphin the end of last season and tried to use it this year and it doesn't work. When plugged in I see it starts bubbling but doesn't move. …

Dolphin Diagnostic works intermittently Not rated yet
My Dolphin Diagnostic works intermittently. It sometimes starts up immediately when put in the water and other times sits there and does nothing ( no spinning …

Main drain  Not rated yet
We have a Dolphin Diagnostic and it keeps getting stuck on the main drain dome and is wearing the liner in that spot. Please advise what can be done I …

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