Troubleshooting
4-56
Samsung Electronics
1. Cause of problem
Is the S-net
estimated value and the
Manifold Gauge value in range?
When heating operation
temperature and the quantity is within
the normal range?
Are the Indoor Unit and Outdoor
Unit EEV normally operating?
Are there any blockage inside
the pipe? (filter etc.)
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?
Auto Trial Operation
Open the Service Valve
Replace Low Pressure sensor
Check the water pipes
Check the relevant EEV
Pipe inspection
Replace relevant component
Yes
Yes
Yes
Yes
No
Are all service valves open?
Connect S-net and Manifold Gauge.
(essential requirement)
No
No
No
Yes
Yes
Yes
No
Outdoor unit
display
( Water Cooled )
Indoorunit
display
Duct, Cassette (1/2 Way),Console, Celing
Cassette (4/Mini4 Way)
Wall-mounted (NeoForte)
Operation Defrost
Timer
Fan Filter/MPI Operation Defrost
Timer Filter Operation Timer
Turbo
×
×
◑
◑
◑
×
◑
◑
◑
●
◑
◑
※ ●
: ON
◑
: Flash ×: OFF
Judgment
Method
∙ Inspection when the value of low pressure sensor is 2.6kg/cm², or less for air conditioning and 1.4kg/cm² for heating.
Cause of
problem
∙ Refrigerant shortage
∙ Electronic expansion valve blocked
∙ Service 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 -20°C or less for heating and operating outside temperature at -5°C or less for Cooling)
∙ When heating operation, if the water temperature and quantity are below the normal range.
