General Troubleshooting - Insinger USN-72 Technical Manual

Part 5:
BASIC SERVICE
5.2
General Troubleshooting
In the event that your dishwasher does not perform as expected, refer to the troubleshooting guide
below. Perform the action suggested in the solution column. Contact a qualified service
technician if the solution refers to a Repair Procedure i n Part 5.3.
Many conditions may be resolved by performing the seven basic checks listed below:
1. All switches are ON.
2. Drain valves closed.
3. Wash and rinse nozzles are clean.
4. Wash and rinse pipe assemblies are installed correctly.
5. Scrap screens are properly positioned.
6. Thermostat(s) are properly adjusted.
7. Detergent and rinse additive dispensers are adequately filled.
CONDITION CAUSE SOLUTION
Machine will not start
Doors not closed
...................................
Main switch off
.....................................
Door safety switch faulty
......................
Conveyor jammed
.................................
Water level low in tad+)
....................
Defective float switch
...........................
Motor overload tripped
.........................
Blown fuse or circuit breaker
................
Make sure doors are fully closed
Check disconnect at main panel
Check machine power switch
Refer to Repair Procedure 5.3.22
Refer to Repair Procedure 5.3.20
Check float switch@) and fill tanks
Refer to Repair Procedure 5.3.5
Refer to Repair Procedure 5.3.24
Refer to Repair Procedure 5.3.23
Low or no water Main water supply is turned off
............
Machine not filled initially
...................
Tank drain valve(s) open
......................
Clogged line strainer
.............................
Faulty manual fill valve
........................
T u r n
on main water supply
Close drains/Open manual fill valves
Close drain valve(s)
Replace manual fill valve
Clean strainer screenheplace strainer
Pump motor not running Motor overload tripped
.........................
Defective motor
....................................
Refer to Repair Procedure 5.3.24
Refer to Repair Procedure 5.3.14
Tank(s) water
temperature is low
when in use
Incoming water temperature
.................
to machine too low
Defective thermometer
........................
Defective thermostat
.............................
Steam supply shut off
...........................
Low steam pressure
..............................
Defective steam solenoid valve
............
Defective steam trap
.............................
Raise temperature to:
Refer to Repair Procedure 5.3.7
Refer to Repair Procedure 5.3.8
Turn on steam supply
Correct steam pressure is 15-30 PSI
Refer to Repair Procedure 5.3.4
Refer to Repair Procedure 5.3.11
140°F/43-600C
CONDITION CAUSE SOLUTION
38