LG DLEX3900 Series Service Manual page 40

Test 2
Caution
Trouble Symptom
Measurement Condition
ake 6-pin Connector from
T
the Controller.
Metal or Wire
Table 1. Resistance for Thermistor Temperature.
Air TEMP. [°F( )]
50°F (10 )
60°F (16 )
80°F (21 )
70°F (27 )
Before measuring resistance, be sure to turn the power off and discharge voltage.
(When discharging, contact the metal plug of power cord with the ground.)
During diagnostic test, tE1 and tE2, an error occurs.
During operation, the heater does not turn off.
Difference between actual and sensed temperature is significant.
After turning power off, measure the resistance.
Short with metal between the NA6 connector's
Pin ① (Yellow Wire) and Pin ④ (Blue Wire) to
Controller.
Check if resistance is in the range of Table 1
when measuring resistance between
terminals after separating harness
from thermistor assembly connector.
Check harness-linking connector.
RES. [KΩ]
Air TEMP. [°F( )]
18.0
90°F (32°C)
14.2
100°F (38°C)
11.7
110°F (43°C)
9.3
120°F (49°C)
NO
YES
RES. [KΩ]
7.7
6.2
5.2
4.3
39
40
• Check if control
and the 6-pin
connector are
YES
properly
connected.
• Replace
controller
• Replace
NO
thermistor.
RES. [KΩ]
Air TEMP. [°F( )]
130°F (54
)
140°F (60 )
150°F (66 )
160°F (71
)
2.9
3.0
2.5
2.2