Indoor Heat Exchanger Temperature Sensor Error (E122) - Samsung AC009BNLDCH Service Manual

4-4-2. Indoor heat exchanger temperature sensor error (E122)

Outdoor Unit display
Wired remote Control, Wind Free RAC
Duct, 1way Cassette
Display
Duct
Blue Red
1way
Blue Yellow
◑
X
Judgment
Refer to checking method, as shown below
method
Symtom If the short or open circuit of indoor heat exchanger temperature sensor.
Is the indoor heat exchanger
temperature sensor connector disconnected
from the PCB?
No
Remove the indoor heat exchanger
temperature sensor connector from
the PCB and measure the resistance
between two terminals
In this case, is the resistance
value out of range in the temperature table
on the right?
No
Restart the system after replacing the PCB
Samsung Electronics
E122
E122, E123
4way Cassette,
4way Cassette(600x600)
or
or
or
◑ ◑ ◑
X X
MAX4
◑ ◑
X X X
Yes
Restart the system after
connecting the connector to PCB
Yes
Failure of the indoor heat
exchanger temperature sensor
(replace)
Troubleshooting
Console
◑ ◑
X X X
<Temperature sensor resistance value>
Current
temperature
(°C)
40
35
30
25
20
15
10
5
0
-5
-10
360 Cassette
RED ●↔GRN ●
Resistance
(kΩ)
5.800
6.900
8.300
10.00
12.10
14.70
18.00
22.00
28.30
33.90
42.30
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