Haier AW07LC2VHA Technical Overview page 49

Testing Temperature Sensors
The easiest problems to solve will involve codes that are
related to potential failure of temperature sensors. Common
problems may include loose connections, open electrically,
and out of calibration. Checking the condition of the sensors
requires a temperature probe and an ohmmeter.
The Reference Section of this manual contains temperature
resistance tables that can be used to check the calibration
of the sensors. The measured resistance must be within the
tolerances printed on the top of the tables.
Testing Procedure
To test the electrical condition of a temperature sensor
perform the following:
1. Confirm the sensor is firmly attached to the circuit
board connection plug.
2. Remove the sensor wires form the connection plug
by releasing holding tension on the plugs tension
tab.
3. Use an ohmmeter to test the electrical resistance
of the sensor.
4. Measure the air temperature near the sensor
and compare the required resistance against
measured resistance. (See chart in reference
section) If the sensor is within calibration, the
sensor is good. If the sensor is out of calibration,
replace the sensor. (Tube Sensors should be
removed from socket and exposed to air
temperature during test.)
CASSETTE UNIT TECHNICAL OVERVIEW
Cassette Unit Sensor Testing Procedures
TESTING
Temperature Sensor
Disconnect Temperature Sensor
Check Temperature Sensor
PAGE 49