Pressure Sensor - Samsung AM040KXMDEH/EU Service Manual

2) Pressure Sensor

Things to Check: High/low pressure sensors of stand-alone outdoor unit
Error Code: None (showing "Check Required" on the result report)
Determine the pressure sensor status of stand-alone outdoor unit before running the compressor.
When having a "Check Required" message from the pressure sensor of outdoor unit, please check in the following order.
Outdoor Unit Vacuum Mode
Check for problematic pressure sensor
the pressure sensor connectors
connected properly?
Is the voltage of 5v
read between the pins 3 and 4
(pins 2 and 4 in case of intermediate
pressure level) from the PCB
pressure sensor
intermediate and low pressure sensor
deviation of outdoor unit
Outdoor Unit Vacuum Mode
[Note]
- When there is a history of outdoor unit operation (including Auto Commissioning & Management System operation),
please try to maintain the vacuum mode for five minutes or more.
Are
Yes
terminal?
Yes
Is the high,
below 2?
Yes
Finish
Auto Commissioning & Management System & Amount of Refrigerant Check Function
* Check for problematic pressure sensor upon
checking pressure by connecting the saturated pressure of
outdoor temperature or manifold gauge.
No
Check and Take Action
No
Replace main PCB
No
Replace pressure sensor