Low Pressure Sensor Error (Open/Short) - Samsung AM080FX A Series Service Manual

Troubleshooting
4-3 Appropriate Measures for Different Symptom (cont.)

4-3-24 Low Pressure sensor error (Open/Short)

Outdoor unit
display
Duct, Cassette (1/2 Way),Console, Celing
Operation Defrost
Indoorunit
×
display
※ ● : ON ◑ : Flash ×: OFF
Judgment
∙ Detect according to temperature detected with the low pressure sensor.
Method
Cause of
∙ Disconnection or breakdown of relevant sensor.
problem
1. Low 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
Low pressure
sensor connector (CN41)
connected to PBA?
Is there refrigerant inside the set?
(Please check by connecting the Manifold gauge
to the service valve)
Low pressure sensor terminal of PBA : Is the
voltage between 3 and 4 pins 5V?
Replace Low Pressure sensor
Samsung Electronics
Timer Fan Filter/MPI Operation Defrost
× ◑ ◑ ◑
Yes
Yes
Yes
Cassette (4/Mini4 Way)
Timer Filter Operation
× ◑ ◑
No
Please re-inspect after connecting
No
No
The ▼ mark is the 1st pin on the PBA.
Wall-mounted (NeoForte)
Timer Turbo
◑ ● ◑
the connector to the PBA
Refill refrigerant after vacuum
Replace PBA
◑
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