Control Board Information/Specs; Component Testing - KitchenAid KUDE20FB*0 Technical Education

TESTING
DANGER
Electrical Shock Hazard
Only authorized technicians should perform
diagnostic voltage measurements.
After performing voltage measurements,
disconnect power before servicing.
Failure to follow these instructions can result in
death or electrical shock.
Control Board Information
SPECIFICATIONS
ELECTRICAL SUPPLY:
(Under Load): 60Hz 120V AC
SUPPLY WATER FLOW RATE:
To Fill 1.9 L (2 qt.) In 27 Seconds, 120 psi Maximum, 20 psi
Minimum
SUPPLY WATER TEMPERATURE:
49° C (120° F) (Before starting a cycle, run water from the sink
faucet until hot)
WATER CHARGE:
3.5 L (0.9 gal) Approximate
LOWER SPRAY ARM ROTATION:
12 TO 40 rpm
UPPER SPRAY ARM ROTATION:
12 TO 30 rpm
FUSE SERVICE & DIAGNOSTIC CHECKS
FOR L1 FUSE, WASH/DRAIN MOTORS FUSE, AND TRIAC FUSE
1. Verify harness connections to all loads and control are secure.
2. Check stored failure code and/or operation of loads during
service diagnostics cycle.
L1 FUSE DIAGNOSTICS:
DISHWASHER IS COMPLETELY UNRESPONSIVE
¾ If Neutral and L1 are present at P4, pins 1 & 2 respectively,
the L1 fuse is open. Replace Control.
6-4 KitchenAid 2013 Stainless Steel Tall Tub Dishwasher
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For Service Technician Use Only
TRIAC FUSE DIAGNOSTICS:
TRIAC LOADS: DISPENSER, DIVERTER MOTOR, FILL VALVE,
LOWER SPRAY ARM (SOME MODELS)
¾ If any of the TRIAC loads work, then the TRIAC fuse is OK.
Diagnose and repair non-working triac loads.
¾ If all TRIAC loads fail to operate, TRIAC fuse is open.
Replace Control.
WASH/DRAIN MOTOR FUSE DIAGNOSTICS:
¾ If both the wash and drain motors fail to operate, motor
fuse is open. Replace Control.
¾ If only wash or drain motor operates, fuse is OK. Use meter
to measure non-operational motor's (3) phase resistances.
¾ If a phase is open (>1K ohms) or unequal to the others,
motor is bad. Replace Motor.
¾ If all phases are equal and within range (see wash/drain
strip circuit), use meter to verify wiring harness continuity
(<3 ohms) from Control connection to motor phase.
¾ If harness continuity is OK, Control is bad. Replace Control.
¾ If harness continuity is open or intermittent, harness is bad.
Repair/Replace harness.
IF ANY OF THE FUSES ARE OPEN:
¾ Inspect and check resistances of all loads on fuse. If any
loads are open, shorted, or show evidence of overheating
or pinched wires, replace loads and/or repair wires.

Component Testing

TESTING DISHWASHER COMPONENTS FROM THE
CONTROL
Before testing any of the components, perform the following
checks:
• The most common cause for mis-diagnosed control
failure is poor connections. Therefore, disconnecting,
inspecting and reconnecting wires will be necessary
throughout test procedures.
• All tests/checks should be made with a VOM or DVM
having a sensitivity of 20,000 ohms-per-volt DC, or
greater.
• Check all connections before replacing components,
looking for broken or loose wires, failed terminals, or
wires not pressed into connectors far enough.
• Voltage checks must be made with all connectors
attached to the boards.
• Resistance checks must be made with power cord
unplugged or power disconnected, and with wiring
harness or connectors disconnected from the control.
• The testing procedures in this section may require the
use of needle probes to measure voltage. Failure to use
needle probes will damage the connectors.