Refrigerant Leakage Error - Samsung AM080xXV Series Service Manual

4-3-37 Refrigerant leakage error

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