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Hi,
I wonder if anyone can help me?
I believe that the motor on my machine is faulty (circuit board has been tested and found to be OK). The motor is running on its slowest speed only on both wash and spin cycles. I have found that the terminals for the brushes are constant 240v but that the outer coil windings (field windings?) are 240v when motor is at rest which drops to 200v and the motor runs at a slow speed. The relay clicks on and off and after a short time when another of the four relays on the board clicks on, the voltage on the motor drops to 155v but the motor doesn’t move. Could the motor be failing under the heavier current? Should this drop trigger the higher speed spin and would further variable voltages trigger other speeds? If so, what part is at fault and would a new motor solve this problem or is it possible that the circuit board is faulty after all? The brushes look good and I have checked the continuity from PCB to motor contacts.I have quite a bit of electrical experience but I am uncertain about the speed control function of this machine. Can anyone point me in the right direction?
Re: Hoover ACM 15 won’t spin
I don’t recall that model number? What are the numbers on the back panel I wonder?
Most likely the Motor and Module are OK if it tumbles in both directions, which would indicate the water level switch thinks the machine is still full of water (in that case it would not ramp into spin).
Earth insulation test of motor is essential lest the windings or commutator are down to earth by any degree also 😉
Re: Hoover ACM 15 won’t spin
Hi again,
Machine was from currys about three years ago, there are numbers above a bar code on the back, 31000154 0233 8734.
First thing i did was try draining all water by opening filter, no change.
also tried running with belt removed also no change.checked all connections and wiring from pcb to motor, no fault found. Gave up due to laundry backlog and called in local service enginer. he suspected pcb and sent it away to be tested/repaird but no fault was found. he said that only left the motor and recomended paying hoovers £85 call out fee as we had a 5 year parts warranty and the motor was £115.
Unfortunatly we cant find the currys invoice so now cant do that. serial no wont do.
Found a local place that has motors for £84, but he will not take it back if it proves not to be that. He recomended bringing the motor in and his enginer would test run it. He has done that and thinks its ok, but i asked if he had varyed the voltage to run it at different speeds and he replied that speed control is all down to the pcb card wich must be the fault. also that the motor has only two speeds, which is crap.
I have just removed the small hose from the pressure switch and tested contacts by blowing in to it, meter across contacts. its ok.
I have not checked the motor insulation as i dont have a mega is this my next move. I am not sure the chap that has the motor would know what a mega ohm was.
Under orders from wife to fix it today or by a bosh as after two weeks hols with two small kids, laundry pile is huge.
Have only seen motor turn in one direction? thought that chip on card getting mixed up info from tacho may explain that.Re: Hoover ACM 15 won’t spin
Anonymous wrote:
Have only seen motor turn in one direction? thought that chip on card getting mixed up info from tacho may explain that.Therein may just lie the problem….if it does only turn in one direction then one of the reversing switches is faulty. I don’t recognise the model but these are built into the timer if it has an analogue control so a new timer would be required.
Not a common fault but one I’ve seen a few times over the years on various makes.
Re: Hoover ACM 15 won’t spin
Went to one similar to this only two days ago, was surprised to see the ancient control timer with all the wiring on separate amp tags, and basic module in place. Apart from a Hotpoint top loader two weeks ago, I cannot remember the last time I had to change a timer like this.
Machine tumbles in one direction only on wash. On spin starts to turn for a few seconds then motor stops.
Customer found her invoice so advised her to contact Hoover under 5 years parts warranty.
Alan P, does the control timer on your machine incoporate a PCB or has it just got a lot of separate Amp tag connections?
PS. How did you pay for the machine, if you have a cheque book stub and bank account or credit card details then if you push hard enough they should accept that as proof.
Re: Hoover ACM 15 won’t spin
No timer in this one, it’s completely electronically controlled with a motorised selector switch.
I think the board is at fault to be honest, part number 97920789 at £66.41 the motor is 91201102 at £94.15 should it prove to be at fault (both inc VAT).
Dave.
Re: Hoover ACM 15 won’t spin
Anonymous wrote:31000154 0233 8734.
Thanks for that and it shows your machine was made in Week 33 of 2002 hence the code 0233 within the numbers, so it’s only just 3 years old and you may have bought it in the Autumn of 2002 I expect?
Your machine has a main Control Module fault (relays most likely?) I would think as it does not have a Timer/Module unit as in earlier versions.
You should easily be able to claim your machine qualifies for the Free 5 year parts deal and therefore I recommend you put it all back together and call in the agents to fix it 😉
Re: Hoover ACM 15 won’t spin
Thanks very much for your help.
I have done exactly that, armed with the exact build date of the machine I phoned hoover service and they backed down, they wont insist on the recept.
going back through bank transactions was also a good tip ill remember.
The control module/pcb being sent away for testing and returned with no fault found has confused me. however i dont know how well it was tested or by who and could very well still be the cause of the fault. I am an auto electrician and I understand that some times the best way to prove a fault is by substitution so Ill let the hoover guy do that on friday morning.
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