High Pressure Sensor Error (Open/Short) - Samsung AM072BXV Series Service Manual

Troubleshooting
4-3 Appropriate Measures for Different Symptom (cont.)
4-3-23

High 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 high pressure sensor.
Method
Cause of
• Disconnection or breakdown of relevant sensor.
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. Inspection Method
High pressure sensor
connector (CN42) 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
Timer Fan Filter/MPI Operation Defrost
× ◑ ◑
to PBA?
Yes
Yes
Yes
Cassette (4/Mini4 Way)
◑ × ◑
No
No
No
Wall-mounted (NeoForte)
Timer Filter Operation Timer
◑ ◑ ●
Please re-inspect after connecting
the connector to the PBA
Refill refrigerant after vacuum
Replace PBA
The ▼ mark is the 1st pin on the PBA.
Turbo
◑ ◑
104