Table of Contents
Advertisement
Sensor Rod Circuit Description
The moisture-sensing rods are part of a circuit
that is designed to utilize a low-voltage capacitor
that charges to 5 V when the circuit is open, and
discharges to 1 V when the circuit is shorted. The
gap in the circuit is the space between the rods.
When the wet clothes touch the two rods, they
create a short, which discharges the capacitor.
When the clothes become dry, they cannot short
the circuit and the charge across the capacitor
builds to 5 V. A voltage of 1 V across the capacitor
read by the PCB indicates wet clothes. As the
clothes are dried, the voltage increases, and
finally 5 V across the capacitor indicate completely
dry clothes.
In the diagnostics mode, a code of S0 indicates a
normally open circuit (the capacitor is charged
properly). The code E2 indicates a shorted capaci-
tor or some other problem on the board. To check
the discharging of the capacitor, touch the rods
with your hands, shorting the two rods for at least
5 seconds. The S0 will change to SS, indicating
that the capacitor discharged properly. No change
from S0 indicates that either the rods are not
connected to the board or there is some other
problem on the board.
Note: If you want to repeat the test, wait for at
least 45 seconds to fully charge the capacitor.
To Enter Field Service
Diagnostic Mode
Begin
Press and hold
Start/Pause and
Cottons buttons.
Release Start/Pause
button and Cottons
button.
Field Service
Mode
Sensor Rods Table
D
S
S
D
O
u
p t
t u
S
O
o t
S
S
2 E
o t
S
S
2 E
o t
2 E
The Field Service Mode can be exited in three
ways:
1. Press the Stop/Cancel keypad.
2. Unplug the unit.
3. Control automatically exits test mode after 30
minutes.
Checking Power to the PCB
To check the presence of 240 V at the board, put
the dryer in Air Dry cycle (the motor will run with
no heat).
• If the outer heating element is OK, there will be
240 V between tap 16 (L2 through coil) and tap
8 (L1).
• If the inner heating element is OK, there will be
240 V between tap 10 (L2 through coil) and tap
8 (L1).
To Exit Field Service
Diagnostic Mode
Field Service
Mode
30 Min.
Press Stop/
Timeout
Cancel button.
from Start
of Mode
– 14 –
D
a i
n g
s o
s i
N
o
a F
t l u
R (
o
s d
O
) K
a C
a p
t i c
r o
L
a e
s k
N
t o
C
n o
e n
t c
d e
o t
C
c r i
t i u
-
Loss of
Power to
Control
Idle
GEA00535
Hide quick links:
Advertisement
Table of Contents
