Water Temperature Increase Prevention Error - Samsung AG026MN1DEH/EU Service Manual

4-3-4. Water temperature increase prevention error

Error number
Duct, cassette (1‑Way/2‑Way/
Mini 4‑Way)
Fan coil unit 1‑Way
display
Yellow
blue
green
2‑Way
Green Red
× ×
Criteria ∙ Refer to the judgment method below
Cause of
∙ Introduction of high water temperature of more than ∙65℃
problem
1. How to judge
‑ Maintain for 1 hour as average temperature of Eva In and Eva Out is 65℃
2. How to check
After separating the indoor EVA
IN sensor connector from the PCB,
measure the resistance value
between the two terminals
Did the resistance value
significantly stray from the
following temperature table?
Did the temperature of the
entering water (Eva In) exceed
65℃?
Maintain the entering water at
under 65℃.
4‑Way cassette type
r u n /
Defrost
stop
or
or
◑ ◑ ◑ × ◑
No
Yes
No
Wall mount type
LED Indication
Clean
Timer
Filter
18°C 21°C Timer
◑ ◑ × × ◑
Replace indoor EVA IN sensor
as it is defective.
Restart operation after replacing.
4-23
Trouble shooting
Circular cassette type
Ice Yellow
24°C 27°C Blue
Blue Green
◑ ◑ × × ◑
Temp. (°C)
Resistance (KΩ)
70 2.2
60 3.0
50 4.2
40 5.8
30
8.3
20 12.1
10 18.0
0 27.3
‑10 43.0
Red
×