ERROR CODES AND TROUBLESHOOTING
PAGE 61
ENGLISH
Checking Indoor Unit Components
Testing of the following components requires the use of an
ohmmeter and K-type temperature probe.
NOTE: When using the test probes, probe the back or side
contacts of the plug to obtain the reading. Do not try to
probe the connector end of the plug, as this may damage the
contacts.
Checking the Indoor Unit Sensors
NOTE: Use respective temperature / sensor chart for sensor
type being tested.
Coil sensor
Ambient sensor
Step 1
Disconnect the sensor plug from PCB for this test. Failure to
do so may provide inaccurate readings.
Step 2
Determine the temperature of the sensor being tested.
Step 3
Check the resistance value of the sensor.
Step 4
Referring to the temperature / resistance table for the sensor
being checked, verify the resistance value corresponds to the
temperature checked in step 2.
Replace the sensor if the reading is open, shorted, or outside
the specications of the temperature / resistance table.
Step 5
Re-seat the plug on the connector at the conclusion of the
test.
Checking the Up/Down Stepper Motor
Step 1
Disconnect the Up/Down Stepper Motor plug from the PCB
for this test. Failure to do so may provide inaccurate readings.
Step 2
Refer to the chart shown below for plug pin combinations and
resistance values.
White Yellow Orange Blue
Red Grey
White --- 92.6Ohm ---
47.0 Ohm ---
Yellow --- 93.1 Ohm
--- 47.0 Ohm
Orange
46.5 Ohm ---
Blue 46.8 Ohm
Red ---
Grey
Step 3
Re-seat the plug on the connector at the conclusion of the
test
Error Codes and Troubleshooting
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