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The main board is displaying the wrong error
for the problem your machine has.
Fault 49 is water valves error.
The most common problem with AquaSmart is pump faulty
and damaged your motor control board,
Pump and motor control board need replacing.
Your cold valve is faulty. The rubber membrance inside the valve can damaged after certain period of time. The problem may be inside the controller if replcement valve can't fix the problem. There is a resistor on the current path to the valve. It is on the control board. Some timems it can go open. Good luck with the repair
The most common problem with AquaSmart is the pump
not the water valves
The pump has gone bad and blown some parts in the motor controller board and the fuse to the water valves.
Some AquaSmart machines display the wrong Error code (49)
witch is not the correct code for this problem.
Pump and motor controller board need replacing.
Maybe cheaper to buy a good secondhand machine.
machine needs a new motor controller. can't remember what the code is exactly, but I have seen it a few times, generally replacing motor cont works. I htink it can be a motor problem too, test winding with a multimeter to make sure they are equivalent.
Your water valves are 24volt, should read 60 to 64 Ohms on a multimeter. Your error code 49 is Cold valve faulty in your machine. 1 amp fuse and 1 of the Mosfets on the board are blown. You need to get a Technician to replace the parts.
the code error (49) is telling you that the inlet valve is not working make sure the hoses are not blocked. if you have fitted the valve and is still not working then i would try using the unit on cold if it still does not work then there must be a short in the p.c.b control board.
I have successfully used a D1NA60 FET from an earlier version (phase 5) controller to replce the D2NC60. It is a lower rated component but it works. It was necessary to replace the cold solenoid valve (had gone low in resistance to 15 ohms) and the on-board wired fuse as well but all works OK.
A higher rated FET which could be substituted is ST D5NM60.