Whirlpool WED99HEDC0, Техническое образование

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TESTING
HybridCare™ Dryer with Heat Pump Technology
n
6-13
For Service Technician Use Only
L1
RELAY K2
COMPRESSOR
COM1
BK R
N.O.
BK
R
V
COMPRESSOR
V
L2
R
S
C
RUN
START
HIGH LIMIT
BK
R
Y PK
17uF CAP
GND
R
CYCLE CONTROL UNIT
7. If the connections looks good, check for continuity
between the violet wire terminal on the compressor relay
(K2) and terminal “C” (common) on the compressor.
¾
If there is continuity, go to step 9.
¾
If there is no continuity, go to step 8.
8. Remove the compressor cover and check for continuity
across the thermo-switch on the compressor (see Figure
1).
¾
If there is continuity, go to step 9.
¾
If there is no continuity, replace the thermo-switch.
9. Remove the compressor cover and remove all three (3)
motor wires; Common (C)=Black, Run (R)=Red, Start
(S)=Yellow). See Figure 1.
Thermo-Switch
Compressor
Motor
Connections
Figure 1 - Compressor Connections/Thermo-Swtich
10. Using the following chart and the strip circuit below, check
for the resistance values of the compressor’s Run and
Start winding coils as shown in the following table.
NOTE: Run and Start winding coils must be checked at the
compressor.
THERMAL
SWITCH
6.27 ohms
4.13 ohms
COMPRESSOR STRIP CIRCUIT
Compressor
Run Capacitor
Thermo-Switch
R
C
S
Winding Resistance
in ohms
Contact Points
of Measurements
RUN 4.13 ±10% Compressor terminal “C” to
terminal “R”
START 6.27 ±10% Compressor terminal “C” to
terminal “S”
START &
RUN
10.4 ±10% Compressor terminal “R” to
terminal “S”
¾ If the resistance at the compressor is correct, go to step
11.
¾
If the Run or Start winding resistance is much greater
or less than the values listed in the table above, replace
the heat pump base assembly.
11. If the preceding steps did not correct the problem and L1
and L2 were both detected in Step 1, replace the CCU.
12. Reassemble all parts and panels.
13. Plug in dryer or reconnect power.
14. Perform steps under “Install Diagnostics”, page 5-4, to
verify repair.
Figure 2 - Compressor Circuit
AC Power