Samsung Electronics 310
Test Operation
3) Pressure sensor (when the outdoor unit is installed with two or more modules)
Error code:
- High pressure sensor: E505 ("NG" is indicated in the result report)
■ Precautions
- If an error occurs, Auto Trial Operation stops immediately.
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.
Open the valve.
Replace the Hub PBA.
Replace the pressure sensor.
Is the ball valve
(service valve) on each outdoor unit
opened?
Are the pressure
sensor connectors properly connected
to the PBA?
Is the pin-to-pin
sensor terminal* on the Hub PBA 5V?
Is the actual
pressure* different from the value on
the pressure sensor?
Perform Auto Trial Operation again.
Yes
Yes
Yes
Yes
No
No
No
No
No
* 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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