Troubleshooting
Samsung Electronics 4-11
4-2-4. High Pressure sensor error (Open/Short) - (E291)
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
Replace High Pressure sensor
Please re-inspect after connecting
the connector to the PBA
No
Yes
High pressure sensor
connector (CN406) connected
to PBA?
Refill refrigerant after vacuum
No
Yes
Is there refrigerant inside the set?
(Please check by connecting the Manifold gauge
to the service valve)
Replace PBA
No
Yes
High pressure sensor
terminal of PBA : Is the voltage between
3 and 4 pins 5V?
Outdoor unit display
Judgment Method • Detect according to temperature detected with the high pressure sensor.
Cause of problem • Disconnection or breakdown of relevant sensor.
The ▼ mark is the 1st pin on the PBA.
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