Whirlpool 4.3 CU FT Service Manual page 31

SUPPLY CONNECTIONS
SUPPLY CONNECTIONS
TERMINAL BLOCK
BK
L1
N W
L2 R
Canadian Installations:
1. Unplug dryer or disconnect power.
2. Access the machine electronics without disconnecting any
wiring to the ACU.
3. With an ohmmeter, check the continuity from L1 and L2
plug terminals of the power cord to the terminals for L1
and L2 on the ACU. See figure 4.
Power Cord
Plug
L1
L2
COM
Figure 4b - Plug-to-terminal connections
If continuity exists for both connections,
go to step 5.
If an open circuit is found, check the integrity
of the connections of the power cord to the
harness in the dryer; harness to the ACU;
and the integrity of the power cord itself.
4. If it is necessary to replace the power
cord, remove the retaining clip that secures
the cord to the back panel. Disconnect the
cord from the main harness and the ground
For Service Technician Use Only
L1
BK
N
G-Y
CABINET
GROUND
L2
R
Figure 3 - Supply Connections Strip Circuit
FOR SERVICE TECHNICIAN'S USE ONLY
ACU
Figure 4
for electric dryer.
RFI (IF)
BK
R
¾ If continuity exists for both connections, go to step 5.
¾ If an open circuit is found, check the integrity of the
connections of the power cord to the harness in the
dryer; harness to the ACU; and the integrity of the
power cord itself.
4. If it is necessary to replace the power cord, remove the
retaining clip that secures the cord to the back panel.
Disconnect the cord from the main harness and the
1. Unplug dryer or disconnect power.
ground wire from the rear panel, then pull out the power
cord.
2. Remove top panel, left side panel, and
5. Visually check that ALL connectors are fully inserted into
console to access the machine electronics.
the ACU.
6. Visually check that ALL connectors are fully inserted into
3. Door Switch problems can be uncovered
the UI.
by following procedure under TEST #7: Door
7. Reassemble all parts and panels.
Switch, page 20; however, the door switch is
8. Plug in dryer or reconnect power.
inside the ACU and no port is available.
9. Perform the Service Test Cycle on pages 3 and 4 to verify
L1
repair.
4. Check the wiring and components:
L2
check for loose, worn, or damaged drum
belt—repair as necessary. Also verify that the
spring and support structure is in position
and in good condition. Make sure there is no
obstruction to drum movement. Check J12
and J4 connections on ACU to motor. Check
continuity. If there is no continuity, replace the
wiring harness. If there is continuity, replace
the drive motor.
5. Reassemble all parts and panels.
6. Plug in dryer or reconnect power.
7. Perform the Service Test Cycle
on pages 3 and 4 to verify repair.
Whirlpool Compact Heat Pump Dryer
TEST #4: Heat System
COMPONENT TESTING
ACU
J13-1
240 V
J13-2
n
3-7