Troubleshooting
Samsung Electronics
4-61
4-3-37 Refrigerant leakage error
Outdoor unit
display
(Refrigerant leakage judgment before starting)
(When start, refrigerant leakage judgment)
Judgment
Method
∙ Before starting : Before compressor starting after system halt 2 minutes
(High & low pressure sensor Open / Short error occurs and 1kg/cm2 or less)
∙ When start : When the high pressure sensor value(cooling 3.1kg/
㎠
, heating 2.2kg/
㎠
) is detection continuously for 3 seconds
Cause of
problem
∙ Refrigerant leakage and shortage
∙ Disconnection or breakdown of high & low pressure sensor
1. Pressure sensor Open/Short error determination method
1) Identifies from when power is supplied or 2 minutes after RESET, and only when set is stopped.
2) An Open/Short error will occur if the input voltage standard range of 0.5V ~ 4.95V is exceeded.
2. Inspection Method
Replace Pressure sensor
Please re-inspect after connecting
the connector to the PCB
No
Yes
Is the pressure sensor connector connected
to the PCB ?
Refill refrigerant after vacuum
No
Yes
Is there refrigerant inside the set?
(Please check by connecting the menu
folder gauge to the service valve)
Replace PCB
No
Yes
Out of the PCB Pressure
sensor terminals, is there voltage between
pins 3 and 4 5V?
The
▼
mark is the 1st pin on the PCB.
