Samsung AVXCSH023/032/040CE, Service Manual, Page: 207 / 363

Troubleshooting
4-123 Samsung Electronics
4-4-29 : Compressor down by low pressure sensor protection control
Yes
Yes
No
Check the EEV.
No
Replace the Cond out sensor.
No
Open the sub valve.
No
All the sub valves open?
The Cond out sensor resistance normal?
(Refer to E231.)
The outdoor/indoor EEV operates normally?
Check the amount of coolant.
1. How to check
Test operation
Yes
Connect S-net to vacuum.(forceful)
Check the pipeline.
No
Clogging in the pipe? (ex-filter)
Outdoor unit display
Indoor unit display ×(Operation) ◑ (Timer) ◑ (Fan) ◑ (Filter) ◑ (Defrost)
Criteria • The Cond out sensor temperature is detected below -35°C.
Cause of problem
• Insufficient coolant, clogging in the motor.
• Bad compressor.
• Bad Cond out sensor.
• The outdoor compressor's Discharge Check Valve leaks.
• Exceeding the temperature limit (For heater operation, the outside temperature is below -20°C.
For AC operation, the outside temperature is below -5°C) Possibilities for errors.