TROUBLESHOOTING

TROUBLESHOOTING

Before determining any specific cause of a breakdown or abnormal operation of your dishwasher, check that:

1.Turn all switches ON, except for the extended wash switch.

2.Wash arms are clean.

3.Scrap screen is properly positioned and clean.

4.Thermostat(s) are at their correct setting.

5.Sanitizer, detergent, and rinse additive dispensers are adequately filled.

6.All plumbing valves are open.

If a problem still exists, use the following table for troubleshooting.

CONDITION

CAUSE

SOLUTION

Machine will not start

Door not closed and latched

Make sure door is fully latched

 

Main switch off, or unit unplugged ....

Check disconnect or plug into outlet

 

 

Make sure the extended wash switch is in

 

 

the OFF position.

 

 

 

Low or no water

Main water supply is turned off

Turn on house water supply

 

 

 

Chemical not feeding

No chemical in container

Replace or fill container

 

Feed tubes to/from chemical

Clear obstruction and flush

 

pump clogged

with hot water

 

Screen on feed tube clogged

Clean and replace

 

Tubing kinked or split

Straighten or replace tubing

 

 

 

Water temperature

Incoming water temperature

Raise temperature to

is low when in use

at machine too low

60°C/140°F for all machines

 

Hi limit tripped

Reset hi limit

 

 

 

Insufficient pumped spray

Clogged spray arm

Clean

pressure

Scrap screen full

Must be kept clean and in place

 

 

 

Low final rinse temperature

Low incoming water

Check the booster - be sure the

 

temperature

thermostat is set to maintain 66°C/180°F

 

 

temperature (501LT is 60°C/140°F)

 

 

(Check all valves to be

 

 

sure they are clean and operating)

 

Hi limit tripped

Reset hi limit

 

 

 

Poor washing results

Water level low in wash tank

Check fill valve and water pressure

 

should be at or 1/2" (13mm)

 

 

above screen

 

 

Detergent dispenser not

Contact service agent

 

operating properly

 

 

Insufficient detergents

Check and fill

 

 

Contact detergent supplier

 

Detergent setting too low

Contact detergent supplier

 

Wash water temperature too low

See above booster temperatures

 

Wash arm clogged

Clean wash arm

 

Improperly scraped dishes

Check scraping procedures

 

Ware being improperly

Use proper racks - do not overload

 

placed in rack

racks

 

Improperly cleaned

Unclog wash arms to maintain

 

equipment

proper pressure and flow conditions

 

Electric element has

Clean and delime

 

soil/lime buildup

 

 

 

 

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Moyer Diebel 501-HTN, 501-LT technical manual Troubleshooting, Condition Cause Solution