LG DLEX4370 Series, Service Manual

Page: 23 / 60

23
Check lint Filter
Clean if needed.
Explain to owner responsibility
-
formance and safety reason.
Run dryer on a heat cycle for
one minute.
If heat is felt, unit may have a
vent problem, Investigate venting
system.
Is vent too long?
Fully or partially clogged, etc?
outlet.
Check with meter at L1 and L2
On out let.
Correct voltage = 208~240Vac
±10%
Is voltage of outlet within correct
range?
3-1 Connection with a Power
Supply Cord
Check voltage of connector to
connector ( ~ . ~ )
CAUTION : Potential for voltages
over 200Vac. Proceed with care.
Heating = 208~240Vac
Stop = 0
Troubleshooting
for inadequate
End-user must
use correct outlet
or have outlet
repaired by
electrician.
Defective main
PCB
Unplug UNIT / Check heater
elements.
Terminal: 1(COM) – 2 = 10Ω
Terminal: 1(COM) – 3 = 10Ω
Terminal: 2 – 3 = 20Ω
Unplug UNIT / Test thermostats
Hi-limit
Open at 257 ± 9
(125 ± 5 ) ∞
Close at 221 ± 9
(94 ± 7 ) 5Ω
Safety
Open at 284 ± 41
(140 ± 5 ) ∞
Close at -31
(-35 ) 5Ω
Defective
Thermostat. If
Safety thermostat
Is open, replace
Both after
Determining what
Caused thermo-
stat
to open
One or both
Heater elements
defective.
Defective Motor
Unplug UNIT / Check centrifugal
switch
Are motor readings normal?
Resistance value =
30mmΩ
Retest heating circuit
No
Yes
No
No
No
Yes
Yes
No
Yes
No
Yes
No
Yes
Not heating (Electric)