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So I got the dishwasher (Hobart ft900 dishwasher) to operate correctly for about 40 - 120 min then it will blow the 1A top fuse on the relay board (original problem). any suggestions

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  • 68 Answers

SOURCE: Commercial Hobart dishwasher

I can't imagine a bad relay board would blow a fuse. The relay board would need to make a bad connection to ground to blow a fuse -- I don't see it.

If you could supply me with the ML#, I'll take a look at the wiring diagram and give you an educated answer.

Not that I recall clearly which fuse is for the drain solenoid, but the two sound related. If a drain valve is obstructed by debris, it will heat up the coil and short it out. I don't know the spec'd ohms, but I would suspect at least 50. I'd check it.

Posted on Jun 10, 2008

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We have an ft900 with error code E516 can we reset to get unit going?


Operation and Care of FT900 SERIES DISHWASHERS SAVE THESE INSTRUCTIONS OPERATION MACHINE PREPARATION - Check before beginning operation. Open the machine doors and make sure all components are in their proper operating positions Pump Intake Screens must be put on holders at each pump intake (Fig.1). Fig. 1 Strainer Pans must be in place on top of each tank (Fig. 2). Fig. 2 End Caps must be correctly installed at ends of all Wash Arms (Fig. 4). Fig. 4 Wash Arms must be properly installed and latched in place (Fig. 5). Fig. 5 The Final Rinse Arm (and Dual Rinse Arm when present) must be properly installed (Fig. 7). Fig. 7 Curtains and drainback pans must be in their proper places, refer to pages 11 - 14. Strainer Baskets must be in place in Strainer Pans (Fig.3). ANK FILLING Assure proper water hardness. Recommended water hardness is 3 grains or less per gallon. Higher hardness may cause excessive formation of lime scale. Chlorides must not exceed 50 ppm. All water (and steam, if equipped) supply valves must be opened and the electric supply turned on before the machine will function. Close all drains and doors. The drain handles are located near the floor at the front of each tank. Rotate drain handles clockwise to the vertical position. The prewash tank,

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I can't imagine a bad relay board would blow a fuse. The relay board would need to make a bad connection to ground to blow a fuse -- I don't see it.

If you could supply me with the ML#, I'll take a look at the wiring diagram and give you an educated answer.

Not that I recall clearly which fuse is for the drain solenoid, but the two sound related. If a drain valve is obstructed by debris, it will heat up the coil and short it out. I don't know the spec'd ohms, but I would suspect at least 50. I'd check it.

Jun 07, 2008 | Hobart Dishwashers

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