High Pressure Sensor Error (Open/Short) - (E291) - Samsung AC024BXUPCH Service Manual

4-2-4. High Pressure sensor error (Open/Short) - (E291)

Outdoor unit display
Judgment Method
Cause of problem
1. High 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. Cause of problem
High pressure sensor
connector (CN406) connected
Is there refrigerant inside the set?
(Please check by connecting the Manifold gauge
to the service valve)
High pressure sensor
terminal of PBA : Is the voltage between
3 and 4 pins 5V?
Replace High Pressure sensor
Samsung Electronics
• Detect according to temperature detected with the high pressure sensor.
• Disconnection or breakdown of relevant sensor.
to PBA?
Yes
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.
Troubleshooting
Replace PBA
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