E410 : Comp Down Due To Low Pressure Protection Control - Samsung AG042KSVANH Service Manual

4-3-22. : COMP DOWN due to low pressure protection control
Inverter / Hydro control part display
Judgment Method
Cause of problem
1. Inspection Method
estimated value and the Manifold Gauge value
Are the indoor unit
and outdoor unit EEV normally
Are there any blockage
inside the pipe? (filter etc.)
in the liquid pipe valve or the discharge
check valve of the not-go-end outdoor unit when
only some outdoor units
Check the refrigerant amount
Inspection when the value of low pressure sensor is 1.8kgf/cm², or less for air conditioning and 0.8kgf/cm² for heating.
∙ Refrigerant shortage
∙ Electronic expansion valve blocked
∙ Low pressure sensor defective
∙ Leakage of compressor discharge check valve of not-go-end outdoor unit
∙ Error may be found when used in temperature range outside the conditions of use
(Operating outside temperature at -25°C or less for heating and operating outside temperature at -15°C or less for Cooling)
Trial Operation
Yes
예
Is the S-net
in range?
예
Yes
operating?
예 Yes
아니오 No
Is there any leakage
are operating?
예
No
Connect S-net and Manifold Gauge
(Essential requirement)
아니오 No
Replace low pressure sensor
No
아니오
Check the relevant EEV
Yes
예
Yes
아니오
Replace relevant parts
62
Check the piping