Samsung AM072/096/120/144FXVAFH Service Manual page 171

Troubleshooting
Comp. Down due to high pressure protection control
Outdoor unit display
Operation Defrost
Indoorunit display
※ ● : ON ◑ : Flash × : OFF
Judgment Method ∙ Value of the high pressure sensor is detected at 41kg/cm² or more
<Cooling Operation>
∙ Overheat of supplying water
∙ Shortage of supplying water
∙ Outdoor heat exchanger is contaminated.
Cause of problem
∙ Service valve locked/Fill refrigerant
<Heating Operation>
∙ Indoor unit fan motor problem(constrained, defective)
∙ Service valve locked/Excessive refrigerant
1. How to check
Auto Trial Operation
Are all service valves open?
estimated value and the
Manifold Gauge value in range?
Are the Indoor Unit
and Outdoor Unit EEV normally
Are there any blockage inside
the pipe? (filter etc.)
When cooling operation,
water temperature, quantity, or heating
operation, indoor fan operates
Check the refrigerant amount.
4-74
( Water Cooled )
Duct, Cassette (1/2 Way),Console, Celing
Timer Fan Filter/MPI Operation Defrost
× × ◑ ◑ ◑
Yes
Is the S-net
Yes
operating?
Yes
No
normally do?
Yes
(cont.)
Cassette (4/Mini4 Way) Wall-mounted (NeoForte)
Timer Filter Operation
× ◑ ◑ ◑ ●
Connect S-net and Manifold Gauge.
(essential requirement)
No
Open the Service Valve
No
Replace High Pressure sensor
No
Check the relevant EEV
Yes
Pipe inspection
No
Check the water pipes or Replace
relevant component(motor or fan)
Timer Turbo
◑ ◑
Samsung Electronics