Samsung AVXTJH028EE - Page 205

Troubleshooting
Samsung Electronics 4-114
4-5-55 : COMP. DOWN Due to Low Pressure Protection
Indoor Unit Display
Special Cause
×(Operation)
(Reservation) (Blast) (Filter) ×(Defrost)
t3FGSJHFSBOUTIPSUBHF t&MFDUSPOJDFYQBOTJPOWBMWFCMPDLFE
t4FSWJDFWBMWFCMPDLFE t$PNQSFTTPSVOMPBEJOHGBVMUZ
t-PXQSFTTVSFTFOTPSGBVMUZ
t-FBLBHFPGDPNQSFTTPSEJTDIBSHFDIFDLWBMWFPGOPUHPFOEPVUEPPSVOJU
t&SSPSNBZCFGPVOEXIFOVTFEVOEFSUIFUFNQFSBUVSFDPOEJUJPOPVUTJEFUIFDPOEJUJPOTPGVTF0QFSBUJOH
outside temperature at -20°C or less for heating, and operating outside temperature at -5°C or less for air
conditioning)
Judgment Method
t*OTQFDUJPOXIFOUIFWBMVFPGMPXQSFTTVSFTFOTPSJTLHDN or less for air conditioning and 1.4 kg/cm or
less for heating
Outdoor Unit Display
1. Inspection Method
Are the S-net estimated
value and the Manifold Gauge value in
accordance?
Are the indoor unit and outdoor
unit EEVs normally operating?
Are there any clogs inside the pipe
(e.g. filter)?
Check the refrigerant amount
Is there any
leakage in the liquid pipe valve or the
discharge check valve of the not-go-end outdoor
unit when only some outdoor units
are operating?
Test Operation
Please open service valve.
Change low pressure sensor.
Check relevant EEV.
Pipe Inspection
Change relevant component.
Yes
Yes
Yes
No
Are all service valves open?
Connect S-net and Manifold Gauge
(essential requirement).
No
No
No
Yes
Yes
No
$9;&6+B$BaLQGG 