Specifications

Check SiBE04-624
212 Service Diagnosis
3.14 Humidity Sensor Check
Check No.27 1. Check for proper connection.
2. Check sensor input level
(*1).
3. Change ambient conditions
(*2) and check that input level changes accordingly.
*1 Input level varies depending on the sensor.
*2 Changes in humidity, temperature, air flow rate. To do this, merely breathe upon.
3.15 Main Circuit Short Check
Check No.29

Measure the resistance between pins at both ends of DB1.

If the resistance is ∞ or less than 1 kΩ, the main circuit short.
1
2
3
4
5
6
Buzzer
Humidity sensor
Room temperature thermistor
5V
<Humidity sensor>
S48
GND
12V
C70
(R6023)
(–) terminal of the tester
(in case of digital,
(+) terminal)
(~) (+) (~) (–)
(+) terminal of the tester
(in case of digital,
(–) terminal)
(+) (~) (–) (~)
Resistance in OK
several kΩ
~several MΩ
∞∞
several kΩ
~several MΩ
Resistance in NG 0 or
∞
0 0 0 or
∞