Samsung AM200FXWANR - How to Resolve NG Items

Samsung Electronics 282
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 th
e heat exchanger on the indoor unit)
∙ Error code: None (“NG” is only indicated in the result report)
∙ How to determine error: Check the temperatur
e difference between the thermistors on the indoor units before
the compressors are started.
∙ Perform inspection according to the steps shown below.
Operate all the indoor units in
fan mode for 10 min.
Is there
an indoor unit with a thermistor
that shows a deviation greater than 10ఁ
compared to
other
indoor units?
Change the device
used to the indoor air temp
(Wired remote control
ױIndoor unit)
* How to measure resistance Disconnect
the thermistor c
onnectors from the PBA
and then measure the resistance
between the terminals of the connectors.
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
the wired remote control?
Are the ther
mistor
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 ind
oor unit attached to
the correct positions?
Replace the Hub PBA.
Perform Auto Trial Operation again.
Ŷ Precautions
- If issues occur on multiple components at the same time, the inspection accuracy may degrade.
- If the device used to read the indoor temperature is set to the wired remote control, change the device to the indoor
unit's thermistors and then perform Auto Trial Operation.
Presence of an “NG” item may
occur due to a temp difference according to the positions of the indoor unit and the wired remote
control.
- Thermistors on indoor units where outdoor air is
applied are excluded from inspection.
- To replace a component or inspect the PBA, be sure to cut off the power supply first. If inspection must be performed
with the power
supply on, exercise extra care to prevent electric shock.
Temperature (ఁ )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
Yes
Yes
Yes
Yes
Yes
No
No
No
No
No
9-1 Auto Trial Operation (cont.)