Troubleshooting
Samsung Electronics 4-57
4-3-37 Refrigerant leakage error
Outdoor unit
display
(Refrigerant leakage judg ment before starting)
(When start, refrigerant leakage judgment)
Judgment
Method
Before starting : Before compr essor 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 sec
onds
Cause of
problem
Refrigerant leakage and shortage
Disconnection or breakdown of high & low pressure sensor
1. Pressur e 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 exc eeded .
2. Inspection M
ethod
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 ف mark is the 1st pin on the PCB.
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