High Pressure Sensor Error (Open/Short) - Samsung AM072FXVAFH series Service Manual

Troubleshooting
High pressure sensor error (Open / Short)
AM038/048/055KXWD
Outdoor unit display
Indoorunit display
Judgment Method ∙ Refer to the how to check below.
Cause of problem ∙ Disconnection or breakdown of relevant sensor.
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. How to check
Did the high pressure sensor connector
breakaway from the PCB?
Is there refrigerant inside the set?
(Please check by connecting the manifold gauge to
the service valve)
Out of the PCB high pressure sensor terminals, is
there voltage between pins (3 and 4) 5V?
Replace high pressure sensor
4-60
✳✳
Duct, Cassette (1/2 Way),Console, Celing
Operation Defrost Timer Fan
◑ × × ◑
※ ● : ON ◑ : Flash ×: OFF
Yes
Yes
Yes
(cont.)
Cassette (4/Mini4 Way)
Filter/MPI Operation Defrost Timer
× ◑ × ◑
No
No
No
Wall-mounted (NeoForte)
Filter 18℃ 21℃ Turbo
× ◑ × ×
Restart after connecting the connector to the PCB
Charge the refrigerant after vacuum
Replace PCB
The mark is the 1st pin on the PCB.
Samsung Electronics
24℃ 27℃
◑ ◑