Refrigerant Leakage Error - Samsung AM072BXV Series Service Manual

Troubleshooting
4-3 Appropriate Measures for Different Symptom (cont.)
4-3-36 /
Outdoor unit display
• Before starting : Before compressor starting after system halt 2 minutes
Judgment Method
• When start : When the high pressure sensor value(cooling 3.1kg/ ㎠ , heating 2.2kg/ ㎠ ) is detection continuously for
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
pressure sensor connector connected
refrigerant inside the set? (Please check by
connecting the menu folder gauge to the service
Out of the PBA Pressure
sensor terminals, is there voltage between
pins 3 and 4 5V?
Replace Pressure sensor
Samsung Electronics

Refrigerant leakage error

(Refrigerant leakage judgment before starting)
(When start, refrigerant leakage judgment)
(High & low pressure sensor Open / Short error occurs and 1kg/cm2 or less)
3 seconds
Is the
to the PBA ?
Yes
Is there
valve)
Yes
Yes
No
Please re-inspect after connecting
the connector to the PBA
No
Refill refrigerant after vacuum
No
The ▼ mark is the 1st pin on the PBA.
Replace PBA
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