Samsung AM072/096/120/144FXVAFH, Service Manual

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Troubleshooting
Samsung Electronics 4-73
S-net measured value and Manifold
Gauge value are the same?
Are the indoor unit and outdoor
unit EEV normally operating?
Are there any blockage inside the
pipe? (filter etc.)
Check the refrigerant amount
Trial Operation
Open the service valve
Replace high pressure sensor
Check the relevant EEV
Pipe inspection
Yes
Yes
Yes
No
Are all service valves open?
Connect S-net and Manifold Gauge.
(essential requirement)
No
No
1. How to check
غ
AM038/048/055KXWD
✳✳
Comp. Down due to high pressure protection control
(cont.)
Outdoor unit display
Indoorunit display
× (Operation)
◑
(Timer)
◑
(Fan)
◑
(Filter) × (Defrost)
Judgment Method ∙ Value of the high pressure sensor is detected at 41kg/cm² or more
Cause of problem
<Cooling Operation>
∙ Outdoor unit fan motor problem (constrained, defective)
∙ Motor driver defective or wire short circuit
∙ Contaminated outdoor heat exchanger
∙ Service valve locked / Excessive refrigerant
<Heating Operation>
∙ Outdoor unit fan motor problem (constrained, defective)
∙ Fan motor capacitor defective or wire short circuit
∙ Service valve locked / Excessive refrigerant