Samsung Electronics 308
Test Operation
9-1-3 How to resolve NG items
1) Indoor unit's thermistors
What to inspect: Indoor unit's thermistors (the temperature of the indoor air and the temperatures at the entrance and exit
of the heat exchanger on the indoor unit)
Error code: None ("NG" is only indicated in the result report)
the compressors are started.
Operate all the indoor units in
fan mode for 10 min.
Is there
℃
compared to other
indoor units?
Change the device
used to the indoor air temp
(Wired remote control
→ Indoor unit)
the thermistor connectors from the PBA
and then measure the resistance
Take corrective measures.
Replace the thermistors.
Take corrective measures.
Is the device
used to read the indoor
air temperature for the indoor unit set to
Are the thermistor
connectors on the indoor unit properly
connected to the PBA?
Are the resistance
values* for the thermistors on
the indoor unit normal?
Are the thermistors
on the indoor unit attached to
the correct positions?
Replace the Hub PBA.
Perform Auto Trial Operation again.
■ Precautions
- If issues occur on multiple components at the same time, the inspection accuracy may degrade.
unit's thermistors and then perform Auto Trial Operation.
supply on, exercise extra care to prevent electric shock.
Temperature (℃ )
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
Yes
Yes
Yes
Yes
Yes
No
No
No
No
No
9-1 Auto Trial Operation (cont.)
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