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TROUBLESHOOTING
TROUBLESHOOTING
Before determining any specific cause of a breakdown or abnormal operation of your dishwasher,
check that:
1. Power supply is turned on. All switches are ON.
2. Wash arms are clean.
3. Scrap screen is properly positioned and clean.
4. Thermostat is at the correct setting.
5. Sanitizer, detergent, and rinse additive dispensers are adequately filled.
6. All plumbing valves are open and drain hose is not kinked.
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
Low or no water Main water supply is turned off . . . . Turn on house water supply
Water level setting low. . . . . . . . . . . . Adjust water level
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 house supply temperature to
is low when in use at machine too low 60°C/140°F for all machines
Insufficient pumped spray Clogged spray arms . . . . . . . . . . . . . . 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 (401-L PLUS is 60°C/140°F)
(Check all valves to be
sure they are clean and operating)
Poor washing results Detergent dispenser not . . . . . . . . . . . Contact service agent
operating properly
Insufficient detergents . . . . . . . . . . . . Check dosage
Check and fill
Contact detergent supplier
Detergent setting too low . . . . . . . . . Contact detergent supplier
Wash water temperature too low . . . . See above booster temperatures, run cycle
Wash arms clogged . . . . . . . . . . . . . . Clean wash arms
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
No water in wash well Opening door prior. . . . . . . . . . . . . . . Close and latch door. Wait for green light
to cycle completion to go out before opening door.
Water supply is turned off . . . . . . . . . Turn on supply
No water in wash tank Door not latched. . . . . . . . . . . . . . . . . Latch door
after activating the Wait for wash tank to fill
ON/FILL switch
Cycle time increases Incoming water temperature. . . . . . . . Raise temperature to 60°C/140°F for all
with each cycle is too low machines.