Service Manual

3-10
n
18” & 24” ADA Built-In Dishwashers
TESTING
For Service Technician Use Only
Heang Element
This test will check the wiring to the heater element, the
control board, and the heang element itself. The following
items are part of the heater circuit.
n Harness/Connecon
n Heater Element
n Control Board
Test Procedure
1. Unplug dishwasher or disconnect power.
2. Remove access panel. Remove control board cover to
access control board.
3. Lay the dishwasher on its back. Use a small at-blade
screwdriver to unclip snaps around the drip-pan. Remove
drip-pan/oat switch to access under tub components.
4. Disconnect P02 and CON1 from the control board.
5. Using an ohmmeter, measure resistance between P02 and
CON1-1 (Neutral).
¾ If an open circuit is detected, go to step 6.
¾ If the resistance is approximately 14 ohms, go to step 7.
6. Visually check the wire connecons between the control
board and heater element. If the connecons look good,
check for connuity across the heater element.
¾ Replace heater element if it is electrically open.
¾ Repair or replace wire harness if test fails connuity.
7. Reconnect P02 and CON1 to control board.
8. Set voltmeter to AC and connect leads to P02 and CON1
on the control board. Plug in dishwasher or reconnect
power.
9. Start the Service Mode Test and at step-2 measure for
AC out of the control between P02 and CON1 using a
voltmeter set to AC.
¾ If 120 VAC is measured and heater element is on, go to
step 10.
¾ If no AC voltage is measured, replace control board.
10. Perform Service Mode Test to verify repair.
11. Unplug dishwasher or disconnect power.
12. Reassemble all parts and panels.
13. Plug in dishwasher or reconnect power.
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.
STRIP CIRCUIT - HEATER
Figure 2 - Heater Strip Circuit
CONTROL BOARD
HEATING ELEMENT
CONTROL BOARD
HEATING ELEMENT
L1
CON1-2
N
CON1-1
CON1-1
HEATER RELAY
H
14 ohms
PO1 PO2
(L) (N)(N)
BU
PKPK
BR
120 VAC
CON 1
N & L1
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PO2
Heater Relay
Figure 1 - Heater Connectors