Testing - Haier AW07LC2VHA Technical Overview

Test Condensate Pump and Associated Float Switch
If the internal condensate pump does not operate, the pump
may be bad or the float switch may be defective. Perform the
following test:
Float Switch and Condensate Pump
1. Access the electrical
control box.
2. Unplug the float switch
from the circuit board.
Plug CN-18.
3. The pump should start.
4. If the pump does
not start, check
for voltage to the
pump at connector
CN-9. There should
be 230 Volts AC to
the pump. If there
is not, the circuit
board is defective. If there is proper voltage to
the pump, either the pump or associated pump wiring
is defective.
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.
PAGE 56
SLIM DUCT TESTING PROCEDURES
Testing Temperature Sensors Procedure
To test the electrical condition of a temperature sensor
perform the following:
1.
2.
3.
4.

TESTING

Confirm the sensor is firmly attached to the circuit
board connection plug.
Remove the sensor wires from the connection plug
by releasing holding tension on the plugs tension tab.
Use an ohmmeter to test the electrical resistance of
the sensor.
Measure the air temperature near the sensor
and compare the required resistance
against measured resistance. (refer to charts 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.)