Diagram 5
Diagram 6
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(1) Communication error(C3 、C6）
Main checking points:
ƽ
ƽIf the indoor mainboard or outdoor main board is broken;
Flow chart:
Voltage between Communication and N wire
If the connection wire between the indoor unit and outdoor unit is connected well, if the wires inside the unit is connected well?
Start
Check whether the wiring terminal between
temperature sensor and controller is loosened or poorly
contacted?
yes
yes
yes
yes
Insert the temperature
sensor tightly
no
no
no
no
Eliminate the
malfunction
Check whether the
temperature senspr is normal according to
resistance table
Replace the temperature sensor
with the same model
Replace the controller with
the same model
End
Eliminate the malfunction
(2) Temperature sensor open/short circuit(E2-E5)
Main checking points:
ƽ
;If the temperature sensor is damaged or broken
ƽIf the terminal of the temperature sensor is loosended or not connected;
ƽIf the mainboard is broken;
Flow chart:
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