Test #2 Supply Connections - Whirlpool WED99HEDW0 Technical Education

If +5VDC returns, unplug dryer or
disconnect power and check harnesses
and connections between the CCU and user
TESTING
interface (UI). If acceptable, replace the UI.
8. CCU +12VDC – with voltmeter set to DC,
connect black probe to CCU P5-3 (ground)
WARNING
and red probe to P5-8 (+12VDC). Plug in
If +5VDC is still missing, unplug dryer or
dryer or reconnect power.
disconnect power and replace the CCU.
If +12VDC is present, go to step 9.
If +5VDC returns, unplug dryer or
If +12VDC is not present, unplug dryer
disconnect power and check harnesses
or disconnect power and replace the CCU.
and connections between the CCU and user
9. Unplug dryer or disconnect power.
interface (UI). If acceptable, replace the UI.
Electrical Shock Hazard
10. Reassemble all parts and panels.
Disconnect power before servicing.
8. CCU +12VDC – with voltmeter set to DC,
11. Perform steps under "Install Diagnostics",
Replace all parts and panels before operating.
connect black probe to CCU P5-3 (ground)
page 6, to verify repair.
Failure to do so can result in death or
and red probe to P5-8 (+12VDC). Plug in
electrical shock.
dryer or reconnect power.
TEST #2: Supply Connections
If +12VDC is present, go to step 9.
This test assumes that proper voltage is present
If +12VDC is not present, unplug dryer

TEST #2 Supply Connections

at the outlet, and a visual inspection indicates
or disconnect power and replace the CCU.
that the power cord is securely fastened to the
9. Unplug dryer or disconnect power.
terminal block.
This test assumes that proper voltage is present at the outlet,
and a visual inspection indicates that the power cord is
10. Reassemble all parts and panels.
U.S. Installations:
securely fastened to the terminal block.
11. Perform steps under "Install Diagnostics",
1. Unplug dryer or disconnect power.
U.S. Installations:
page 6, to verify repair.
1. Unplug dryer or disconnect power.
2. Remove the cover plate from the top right
2. Remove the cover plate from the top right corner of the
corner of the back of the dryer. See figure 3.
back of the dryer. See figure 1.
TEST #2: Supply Connections
This test assumes that proper voltage is present
at the outlet, and a visual inspection indicates
that the power cord is securely fastened to the
terminal block.
U.S. Installations:
1. Unplug dryer or disconnect power.
2. Remove the cover plate from the top right
corner of the back of the dryer. See figure 3.
Figure 1 - Remove the cover plate.
Figure 3 - Remove the cover plate.
3. With an ohmmeter, check for continuity between the
3. With an ohmmeter, check for continuity
neutral (N) terminal of the plug and the center contact on
between the neutral (N) terminal of the plug
the terminal block. See figure 2.
and the center contact on the terminal block. ¾ If there is no continuity, replace the power cord and
test the dryer.
See figure 4a.
¾ If there is continuity, go to step 4.
If there is no continuity, replace the power
cord and test the dryer.
If there is continuity, go to step 4.
4. In a similar way, check which terminal of
the plug is connected to the left-most contact
Figure 3 - Remove the cover plate.
on the terminal block and make a note of
3. With an ohmmeter, check for continuity it. This will be L1 (black wire) in the wiring
diagram. See figure 4a.
between the neutral (N) terminal of the plug
n
6-6 and the center contact on the terminal block. HybridCare™ Dryer with Heat Pump Technology
See figure 4a.
FOR SERVICE TECHNICIAN'S USE ONLY
For Service Technician Use Only
Remove Screw
Cover Plate
Remove Screw
Cover Plate
continuity with the left-most contact of the
terminal block, replace the power cord and
retest dryer.
Power Cord
Plug
N
4. In a similar way, check which terminal of the plug is
connected to the left-most contact on the terminal block
When this is found, go to step 5.
and make a note of it. This will be L1 (black wire) in the
wiring diagram. See figure 2.
If neither of the plug terminals have
¾ When this is found, go to step 5.
continuity with the left-most contact of the
¾ If neither of the plug terminals have continuity with
terminal block, replace the power cord and
the left-most contact of the terminal block, replace the
COM
power cord and retest dryer.
retest dryer.
Figure 4a - Plug-to-terminal connections
Power Cord
for electric dryer.
Plug
N
5. Access the machine electronics without
disconnecting any wiring to the CCU.
6. With an ohmmeter, check for continuity
between the L1 terminal of the plug (found
in step 4) and P9-2 (black wire) on the CCU.
If there is continuity, go to step 7.
COM
If there is no continuity, check that wires to
Figure 4a - Plug-to-terminal connections
the terminal block are mechanically secure.
Figure 2 - Plug-to-terminal connections for electric dryer.
for electric dryer.
If so, replace the main wire harness and
5. Access the machine electronics without disconnecting any
test the dryer.
5. Access the machine electronics without
wiring to the CCU.
disconnecting any wiring to the CCU.
6. With an ohmmeter, check for continuity between the L1
7. Check for continuity between the neutral
terminal of the plug (found in step 4) and P9-2 (black wire)
(N) terminal of the plug and P8-3 (white wire)
6. With an ohmmeter, check for continuity
on the CCU.
on the CCU.
¾ If there is continuity, go to step 7.
between the L1 terminal of the plug (found
¾ If there is no continuity, check that wires to the
in step 4) and P9-2 (black wire) on the CCU.
If there is continuity, go to step 8.
terminal block are mechanically secure. If so, replace
the main wire harness and test the dryer.
If there is continuity, go to step 7. If there is no continuity, and the mechanical
7. Check for continuity between the neutral (N) terminal of
connections of the wire are secure, replace
If there is no continuity, check that wires to
the plug and P8-3 (white wire) on the CCU.
the main wire harness.
the terminal block are mechanically secure.
¾ If there is continuity, go to step 8.
8. Visually check that ALL connectors are
¾ If there is no continuity, and the mechanical If so, replace the main wire harness and
connections of the wire are secure, replace the main
fully inserted into the CCU.
test the dryer.
wire harness.
9. Visually check that ALL connectors are
8. Visually check that ALL connectors are fully inserted into
7. Check for continuity between the neutral
the CCU.
fully inserted into the UI.
(N) terminal of the plug and P8-3 (white wire)
9. Visually check that ALL connectors are fully inserted into
on the CCU.
10. Reassemble all parts and panels.
the UI.
10. Reassemble all parts and panels.
11. Plug in dryer or reconnect power. If there is continuity, go to step 8.
11. Plug in dryer or reconnect power.
12. Perform steps under "Install Diagnostics",
If there is no continuity, and the mechanical
12. Perform steps under "Install Diagnostics", page 5-4, to
page 6, to verify repair. verify repair.
connections of the wire are secure, replace
the main wire harness.
Canadian Installations:
8. Visually check that ALL connectors are
1. Unplug dryer or disconnect power.
fully inserted into the CCU.
2. Remove the cover plate from the top right
9. Visually check that ALL connectors are
corner of the back of the dryer. See figure 3.
fully inserted into the UI.
3. Access the machine electronics without
10. Reassemble all parts and panels.
disconnecting any wiring to the CCU.
11. Plug in dryer or reconnect power.
4. With an ohmmeter, check the continuity
from L1 and N plug terminals of the power
12. Perform steps under "Install Diagnostics",
cord to the terminals for L1 and N on the
page 6, to verify repair.
CCU. See figure 4b, page 12.
Canadian Installations:
Terminal Block
L1
Terminal Block
L1