Chigo CS-25V1A-H1; CS-35V1A-E2; CS-50V9A-S; CS-70V9A-T - 2, Malfunction code: F2 (the indoor temp sensor fault); 3, Malfunction code: F3 (the indoor coil temp sensor fault)

Fig. 11：the outdoor PCB
2，Malfunction code：F2 （the indoor temp sensor fault）
3，Malfunction code ：F3 （the indoor coil temp sensor fault
）
Turn off the power
Take out the temperature sensor from the
indoor PCB, then check whether the indoor
temperature sensor’s resistance is normal.(the
range of normal resistance :1~40 KΩ)
N
Please replace it .when the
indoor temperature sensor has
problem.
Y
Connect the sensor renewedly to the indoor
PCB,，then check the resistance between the
sensor and indoor PCB terminal. The normal
resistance value is 0Ω
N
The indoor temperature sensor adapter
connector breaks off, please replace the
indoor PCB or restore the adapter
connector.。
Y
The indoor PCB is bad，please change it
Faulty cause：1、maybe the indoor temp
sensor’s bnc connector plugs is loose
or contact ill;
2、the sensor is bad or the down-lead is
circuit-break、circuit－short
3、the indoor PCB’s hardware has been
dama
g
ed
Faulty cause：1、maybe the indoor
coil temp sensor’s bnc connector
plugs is loose or contact ill;
2 、 the sensor is bad or the
down-lead is circuit-break、circuit
－short
3、the indoor PCB’s hardware has
b
een dama
g
ed
Shut off the power
Take out the temperature sensor from the indoor PCB,
Then check whether the indoor coil temperature
sensor’s resistance is normal. (the range of normal
resistance :1~40 KΩ)
N
Replace it .when the indoor coil
temperature sensor has problem.
Y
Connect the sensor with the indoor PCB
again. Check the sensor and the indoor PCB
terminal resistance. The normal value is 0Ω
N
If the indoor coil temperature sensor
adapter connector is loose. Change
this indoor PCB or repair this adapter
connector
Y
The indoor PCB is bad. Please change it.