STERO SD1 LOW TEMP DISHWASHER |
15
TROUBLESHOOTING
This section outlines various symptoms and possible causes that may be encountered in the event of abnormal
machine operation. If symptoms persist after possible causes have been checked, service may be required.
Symptom
Possible Causes
No machine operation.
1. Machine POWER switch in the OFF position.
2. Blown fuse or tripped circuit breaker at power supply.
Continuous machine
operation.
1. Problem with timer. Contact your local service provider.
Dishes not clean.
1. Pump intake strainer clogged causing inadequate water supply to pump.
2. Obstruction in wash arm nozzles or bearings preventing arms from turning. Refer
to CLEANING THE DISHWASHER, page 13.
3. Wash arms improperly assembled. Make sure end caps are assembled and the
knurled disks on the wash / rinse arm hubs are secure.
4. Inadequate fill due to low supply water pressure and / or improper cycle timer
adjustment.
5. Water temperature too low (140°F recommended, 120°F minimum).
6. Improper water hardness (3 grains/gallon is recommended).
7. Excessive lime deposits throughout wash/rinse system.
8. Dirty line strainer (see Figure 6) causing reduced water flow. Turn off water supply,
remove strainer cap, withdraw and clean screen, and reassemble.
9. Incorrect type or concentration of detergent.
10. Check to make sure chemical supply hoses are in the their proper container: Red
in detergent, blue in rinse aid, white in sanitizer. Also, check the standpipes to
make sure they extend to the bottom of the container.
11. Wash tube disconnected from manifold or O-ring leaking, resulting in low water
pressure to upper arm.
12. Wash arm bearings (Figure 21) damaged or excessively worn, preventing free
rotation of the wash arm. To change the wash arm bearing assembly, unscrew
bearing assembly from wash/rinse arm and replace with a new bearing assembly.
13. Check for empty chemical containers.
Spotting of silverware,
glasses and dishes.
1. Improperly loaded racks.
2. Water temperature too low (140°F recommended, 120°F minimum).
3. Improper water hardness (3 grains/gallon is recommended).
4. Improper concentration of detergent, rinse aid, and/or sanitizer.
WASH ARM BEARING
Contact your local Stero-authorized service office for any repairs or adjustments needed on this equipment.
SERVICE
Figure 21
