Test Operation
Samsung Electronics 311
4) Pressure sensor (when only one outdoor unit is installed)
Error code: None ("NG" is only indicated in the result report)
the compressors are started.
■ Precautions
Keep all the outdoor units in vacuum mode for 5 min.
- See the instructions on Key operation modes
Is the deviation
greater than 0.2MPa?
Take corrective measures.
Replace the Hub PBA.
Replace the pressure sensor.
Are the pressure
sensor connectors properly connected
to the PBA?
Is the pin-to-pin
sensor terminal* on the Hub PBA 5V?
Is the actua
pressure* different from the value
on the pressure sensor?
Perform Auto Trial Operation again.
Yes
No
Yes
No
No
No
Yes
* Pressure sensor terminal
Pin # 1 is indicated by ▼ .
* The actual pressure can be checked by calculating
the saturation pressure for the outdoor air tem-
perature or connecting a manifold gauge.
9-1 Auto Trial Operation (cont.)
9-1-3 How to resolve NG items (cont.)
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