Diagnostics & Troubleshooting; Diagnostics - KitchenAid KEMS378S Technical Education

DIAGNOSTICS & TROUBLESHOOTING
Disconnect power before servicing.
Replace all parts and panels before operating.
Failure to do so can result in death or electrical shock.
IMPORTANT
Electrostatic Discharge (ESD)
Sensitive Electronics
ESD problems are present everywhere.
ESD may damage or weaken the elec-
tronic control assembly. The new control
assembly may appear to work well after
repair is finished, but failure may occur at
a later date due to ESD stress.
•
Use an anti-static wrist strap. Connect
wrist strap to green ground connection
point or unpainted metal in the appli-
ance.
-OR-
Touch your finger repeatedly to a green
ground connection point or unpainted
metal in the appliance.
• Before removing the part from its pack-
age, touch the anti-static bag to a green
ground connection point or unpainted
metal in the appliance.
• Avoid touching electronic parts or termi-
nal contacts; handle electronic control
assembly by edges only.
• When repackaging failed electronic con-
trol assembly in anti-static bag, observe
above instructions.
WARNING
Electrical Shock Hazard

DIAGNOSTICS

• Is oven in "Sabbath Mode"? If so "SAB" will
appear in the digital display. Press OPTIONS
and "7" to end Sabbath mode. This will return
to BAKE mode for an untimed bake.
Disconnect power and perform the following
checks:
• A potential cause of a control not function-
ing is corrosion on connections. Observe
connections and check for continuity with
an ohmmeter.
• 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 com-
ponents, looking for broken or loose wires,
failed terminals, or wires not pressed into
connectors far enough. Damaged harness
must be entirely replaced. Do not re-work a
harness.
• Voltage checks must be made with all con-
nectors attached to the boards.
• Resistance checks must be made with power
cord unplugged from outlet, and with wiring
harness or connectors disconnected.
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