Dishwasher Service Manual
90
Troubleshooting and Repair
Factory Test Mode:
The factory test mode, or FTM, is run on each unit during final QC to ensure that all of the com
-
ponents are operating normally. The FTM runs the unit through an abbreviated wash cycle and
checks various sensors for response and is a valuable diagnostic tool. By knowing the timing of
the FTM (shown below), a technician can check for operation of the component in question at the
expected time.
MAKE SURE THAT THE UNIT IS SAFE TO OPERATE, AND ALL PLUMBING CONNECTIONS
ARE MADE PRIOR TO RUNNING THE FACTORY TEST MODE.
To Enter the FTM:
1.
Press the SECURE key for three (3) seconds. Then press the SECURE key again for
three (3) seconds to exit the secure mode.
2.
Press DELAY and SANI RINSE keys simultaneously to start the factory test mode.
3.
Close the dishwasher door. Be sure to close the detergent dispenser prior to initiating
the FTM to check for proper operation.
4.
All LEDs on the dishwasher will turn ON for about 15 seconds then turn OFF.
5.
The factory test will begin. Use the timing chart below for expected operation timing
of the component in question.
If during the FTM one of the electric components fails to operate at the scheduled time, it is likely
that either the component has failed, the wiring has failed or the Power Board has partially failed.
Start by checking the component in question and working back to the Power Board. Use extreme
caution when working with live components.
After test has been completed, press CANCEL key once to exit from the factory test mode. To exit
the factory test mode at anytime, press the CANCEL key once. If the FTM has completed without
error, a solid green light at the bottom of the door (ED model only) and three beeps will signal that
all the major components are operating correctly.
Below is a timing schedule for the factory test:
Component
Duration (sec) Comments
Drain Pump
30
Control Board version displayed
Inlet Valve
60
Power Board software1 version displayed
Pause
20
Power Board software2 version displayed
Circ Pump & Heater
300
Dispenser
5
Drain Pump
30
(Table 1)
