Samsung AM072BXV Series Service Manual page 320

Test Operation
9-1 Auto Trial Operation (cont.)
9-1-3 How to resolve NG items (cont.)
7) Cycle status
∙ What to inspect: Outdoor unit's operation cycle status
∙ Error code: None ("NG" is only indicated in the result report)
∙ How to determine error: View the DSH status during operation.
∙ Perform inspection according to the steps shown below.
Does the result
of Auto Trial Operation show that all
the inspection items other than the cycle
status are normal?
Are
the connectors of the discharge
thermistor and Compressor Top thermistors
properly connected to
the PBA?
Are all
the thermistors attached to
the correct positions?
Are the resistance values
* for the discharge thermistor and Compressor Top
thermistors normal?
Has the indoor unit been
in the Thermo On status during the Auto Trial
Operation?
Perform Trial Operation (cooling/heating)
- See the instructions on Key operation modes.
Is the operation cycle normal?
Perform Auto Trial Operation again.
■ Precautions
- 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.
Samsung Electronics
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
Take corrective measures.
Take corrective measures.
Replace the thermistors.
Take corrective measures.
Ventilate the room.
Take corrective measures.
* How to measure
Resistance Disconnect the therm-
istor connectors from the PBA
and then measure the resistance
between the terminals of the con-
nectors.
Temperature Resistance
(℃ ) (KΩ)
130 8.9
120 11.2
100 18.5
80 32.0
60 59.0
25 200.0
20 242.0
10 362.0
0 553.0
[Resistance values for the discharge
thermistor and the Top thermistors]
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