COMPONENT TESTING
Whirlpool Compact Heat Pump Dryer
n
3-7
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.
3$*(
FOR SERVICE TECHNICIAN’S USE ONLY
DO NOT REMOVE OR DESTROY
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 ground
wire from the rear panel, then pull out the
power cord.
5.
Visually check that ALL connectors are
fully inserted into the ACU.
6.
Visually check that ALL connectors are
fully inserted into the UI.
7.
Reassemble all parts and panels.
8.
Plug in dryer or reconnect power.
9.
Perform the Service Test Cycle
on pages 3 and 4 to verify repair.
TEST #3: Motor Circuit
This test will check the wiring to the motor
and the motor itself. The following items are
part of this motor system:
NOTE:
Verify motor movement in steps S02
and S03 of Service Test Cycle (page 4). If no
motor movement, proceed with the following
procedure.
1.
Unplug dryer or disconnect power.
2.
Remove top panel, left side panel, and
console to access the machine electronics.
3.
Door Switch problems can be uncovered
by following procedure under TEST #7: Door
Switch, page 20; however, the door switch is
inside the ACU and no port is available.
4.
Check the wiring and components:
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.
TEST #4: Heat System
This test is performed when either of the
following situations occurs:
✓
Dryer does not heat
✓
Heat will not shut off
This test checks the components making up
the heating circuit. The following items are
part of this system:
Part of Motor System
Electric
Dryer
Drum belt
ü
Door switch
ü
Harness/connection
ü
Drive motor
Machine control electronics
ü
ü
Power Cord
Plug
ACU
Figure 4b - Plug-to-terminal connections
for electric dryer.
Part of Heating System
Condenser
Dryer
Harness/connection
ü
Heater relay
ü
Heater element assembly
ü
Compressor relay
ü
Heat pump assembly
ü
Outlet thermistor
ü
Compressor thermistor
ü
NTC air channel
ü
Thermal fuse
ü
Machine control electronics
ü
Heat Pump
Dryer
ü
ü
L1
COM
L2
L2
L1
Figure 4
For Service Technician Use Only
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
ground wire from the rear panel, then pull out the power
cord.
5. Visually check that ALL connectors are fully inserted into
the ACU.
6. Visually check that ALL connectors are fully inserted into
the UI.
7. Reassemble all parts and panels.
8. Plug in dryer or reconnect power.
9. Perform the Service Test Cycle on pages 3 and 4 to verify
repair.
L1
ACU
N
SUPPLY CONNECTIONS
J13-1
240 V
BK
TERMINAL BLOCK
CABINET
GROUND
J13-2
L2
L1
N
L2
BK
BK
W
R
R
G-Y
R
RFI (IF)
SUPPLY CONNECTIONS
Figure 3 - Supply Connections Strip Circuit
