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Error Code Diagnostics
F1 - F5 Temperature Sensor Codes
See troubleshooting chart next page
Indoor ambient temperature sensor is open
or short circuited.
Status:
During cooling & dehumidifying, indoor unit
operates while other functions stop; During
heating operation, complete unit stops
1. Loose or bad contact of indoor temperature
sensor
2. Sensor wire leads not properly connected
3. Faulty sensor, check readings with charts
4. Main circuit board defective
Fault & Status Possible Causes
1. Loose or bad contact of indoor temperature
sensor
2. Sensor wire leads not properly connected
3. Faulty sensor, check readings with charts
4. Main circuit board defective
Indoor evaporator temperature sensor is
open or short circuited.
Status:
After reaching set-point, all components stop
operation, cooling and heating modes
Outdoor ambient temperature sensor is open
or short circuited.
Status:
Cooling operation, compressor stops while
indoor fans runs. Heating operation, complete
unit stops
1. Loose or bad contact of outdoor temperature
sensor
2. Sensor wire leads not properly connected
3. Faulty sensor, check readings with charts
4. Main circuit board defective
Outdoor condenser temperature sensor is
open or short circuited.
Status:
Cooling operation, compressor stops while
indoor fans runs. Heating operation, complete
unit stops
1. Loose or bad contact of outdoor temperature
sensor
2. Sensor wire leads not properly connected
3. Faulty sensor, check readings with charts
4. Main circuit board defective
Outdoor discharge temperature sensor is
open or short circuited.
Status:
Cooling operation, compressor stops after
3 minutes while indoor fans runs. Heating
operation, complete unit stops after operating
for 3 minutes
1. Loose or bad contact of outdoor temperature
sensor, head of sensor should be inserted
into the copper tubing
2. Sensor wire leads not properly connected
3. Faulty sensor, check readings with charts
4. Main circuit board defective
F1
F2
F3
F4
F5
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