Smart Appliances Guide

DIAGNOSTICS & TROUBLESHOOTING
Connected Smart Appliances - Gen III
n
4-17
Diagnostics
Troubleshooting Power Management (PM) Board
Perform this procedure if when using the Whirlpool™ app, the
customer is unable to see live power measurements from the
appliance during operaon.
1. Unplug appliance or disconnect power before servicing.
2. Access the Power Management (PM) board.
NOTE: Locaon may vary depending on product.
3. Check Connecons—Conrm that all connecons to
the Power Management board are securely installed,
including WIDE/WIN, Current Transformer(s), and AC
Sense (L1, L2 (if exist), and N). Refer to Figures 9 and 10
on the following page to reference connecons.
4. Check Current Transformer (CT1)—Remove connector J4
from the Power Measurement board. With an ohmmeter,
verify resistance of the current transformer across the J4
pins 1 & 2. Resistance should be 135 ohms ±5%.
¾ If values are correct, proceed to step 5 if appliance uses
L2; if not, reconnect J4 and proceed to step 6.
¾ If values are open or out of range, replace Current
Transformer CT1 or internal harness depending on
appliance.
NOTE: Perform the following step if the appliance uses L2.
5. Check Current Transformer (CT2)—If not already, remove
connector J4 from the Power Measurement board. With
an ohmmeter, verify resistance of the current transformer
across the J4 pins 3 & 4. Resistance should be 135 ohms
±5%.
¾ If values are correct, reconnect J4 and proceed to step 6.
¾ If values are open or out of range, replace Current
Transformer CT2 or internal harness depending on
appliance.
6. Check DC Voltage—Set a voltmeter to DC and connect
the red lead to J2-1 and the black lead to J2-3. Some
appliances may use J2 for WIDE/WIN or J3 (both
connectors are interchangeable).
7. Plug in appliance or reconnect power. Verify that 5 VDC is
present across pins 1 and 3 of either J2 or J3.
¾ If 5 VDC is present, proceed to step 8.
Troubleshoong the Power Management Board
¾ If 5 VDC is not present, check the connuity of the
harness between the PM board and Control. If harness
checks good, verify 5 VDC at the Control board. Repair
or replace as needed.
8. Check AC Sense Voltage—Unplug appliance or disconnect
power. Set voltmeter to AC and connect the black lead to
J1-2 (Neutral) and the red lead to J1-1 (L1).
9. Plug in appliance or reconnect power. Verify that 120 VAC
is present across pins J1-1 and J1-2.
¾ If 120 VAC is present, proceed to step 10 if appliance
uses L2; if not, proceed to step 12.
¾ If 120 VAC is not present, check the connuity of the
harness between the PM board and terminal block or
plug.
NOTE: Perform the following 2 steps if the appliance uses L2.
10. Unplug appliance or disconnect power. Set voltmeter to
AC and connect the black lead to J1-2 (Neutral) and the
red lead to J1-3 (L2).
11. Plug in appliance or reconnect power. Verify that 120 VAC
is present across pins J1-1 and J1-3.
¾ If 120 VAC is present, proceed to step 12.
¾ If 120 VAC is not present, check the connuity of the
harness between the PM board and terminal block or
plug.
12. If the none of the preceding steps resolved the issue,
replace the Power Management board and retest using
the consumer app during appliance operaon.
13. Unplug appliance or disconnect power.
14. Reassemble all parts and panels.
Current Transformer (CT)
Reference power line
BLACK
WIRE
(CT-)
WHITE
WIRE
(CT+)
Figure 8 - Current Transformer
Black face
of current
transformer
towards power
source
Direction of
primary current flow
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.