For Service Technician Use Only
DIAGNOSTICS AND TROUBLESHOOTING (Cont.)
Whirlpool
®
and KitchenAid
®
Filtration and Maytag
®
24" Microfiltration Dishwashers
n
2-5
Service Error Codes (Continued)
FUNCTION CODE ERROR CODE
CAUSES
WHAT TO CHECK
4 - Heating
2 - Heater relay
stuck open or
heater open
˗ Open connection in heater circuit
˗
Heater component open
˗
Heater drive circuit on control
NOTE:
Control will continue running
cycles with no heat without alerting
customer if this fault is detected.
1. Unplug dishwasher or disconnect power.
2.
Measure resistance of heater and all components
and connections in water heating circuit/heat dry
circuit. Fix/replace open connection/part.
3 - Heater relay
stuck closed or
heater failed
˗ Heater relay on control shorted
˗
Heater component shorted to
ground
NOTE:
Control will continue running
cycles with no heat without alerting
customer if this fault is detected.
1. Unplug dishwasher or disconnect power.
2. Inspect heater and connections for overheating/
shorting. If evidence of overheating or shorts
exists, replace.
3.
Measure resistance of heater and all components
and connections in water heating circuit/heat dry
circuit. Fix/replace open connection/part.
5 - Door Switch
1 - Door stuck
open
Door was not latched within 4 seconds
of pressing the Start/Resume key.
Instruct customer. Refer to
.
Loose connection in door switch
circuit and/or door switch contacts
stuck open and/or door switch not
making contact.
˗ Sloppy door latch assembly
(Can be aggravated by high door
closure force keeping strike plate
from fully seating)
˗ Door switch high resistance
1. Check strike plate and door closure force. Verify
door seal is seated properly. Check for interference
between dish racks and door. Try bending strike
plate down for better engagement.
2. Unplug dishwasher or disconnect power.
3. Check resistances of door switch contacts and all
connections in the door switch circuit with meter,
while opening and closing the door latch.
˗ If high resistance with door closed, check/fix
loose connections.
4.
Measure resistance of door switch contacts while
checking mechanical operation of latch assembly.
Check for broken plastic pieces on latch assembly.
Replace latch if faulty.
If none of the above
1. With door open, verify 13 VDC present across
P12-9 and P12-11.
2. If no voltage present, unplug dishwasher or
disconnect power and replace control.
2 - Door stuck
closed
Control programmed to not start if
it suspects the door switch is stuck
closed. Control looks for the door
switch to open between cycles.
˗ Customer didn't open the door
between cycles or door switch
contacts stuck closed.
1. Open and close the door, select cycle, the press
Start/Resume key. If cycle starts, instruct customer
to open the door between cycles.
2. Unplug dishwasher or disconnect power.
3.
Measure resistances of door switch contacts while
checking mechanical operation of latch assembly.
Fix/replace faulty components.
6 -
Communication
1 - UI does
not get
communication
from main
control
User interface has power but cannot
communicate with main control board.
˗ Loose connection between UI and
main control
˗ Terminal or wire broken in harness
between UI and main control
˗ Main control communication circuit
failed
1. Unplug dishwasher or disconnect power.
2. Check connections between P1 on main control
and user interface. Reconnect, repair, or replace
harness.
3. If harness connections are all good, replace main
control board.
Содержание M-17
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