Troubleshooting
Samsung Electronics12-12
■
: Prohibit Starting by Low Pressure
1.
Check Method
1) Measure the pressure using the Manifold Gauge when the system is stopped.
2) Read the low pressure sensor value using the View Mode or S-net.
3) If the value of no. 1 and no. 2 is similar, refrigerant is leaked out almost; therefore, release remaining refrigerant, vacuum
again, and recharge it.
4) If the value of no. 1 and no. 2 is different by much, check and replace it because the contact badness of low pressure
sensor connector part or defect of the sensor itself.
Outdoor unit display
Indoor unit display (Operation) (Timer) (Fan) (Filter) (Defrost)
Before the pump down start for 3 consecutive seconds, when the low pressure sensor value
(high pressure sensor does not come under) among Main Units is below 3.1kg/cm
2
G during
cooling operation and below 2.6kg/ cm
2
G during heating operation, start is prohibited.
(Impossible to restart and error display on the indoor unit).
Causes Refrigerant leakage / low pressure sensor error
• Above error can be occurred because pressure is low on the low pressure side according to the refrigerant is
only gathered at the outdoor heat exchanger after pump-down. In this case, after correctly connecting the
pipe to the indoor unit and open the service valve, refrigerant circulates to the low pressure side; thus, the
error is disappeared.
Judgment method
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