Comp. Down Due To A Protective Control Of High Pressure - Samsung AVXCSH023/032/040CE Service Manual

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: Comp. Down due to a Protective Control of High pressure

Outdoor unit display
(Operation)
Indoor unit display
Criteria • Detect when the value of high pressure sensor is over 4.0MPa
<During cooling operation>
• Problem with Outdoor unit fan motor (stall, defect)
• Outdoor heat exchanger contamination
Cause of problem
• Locked service valve/excessive refrigerant
<During heating operation>
• Problem with Outdoor unit fan motor (stall, defect)
• Locked service valve/excessive refrigerant
1. How to check
Are service valves open?
Do the values of S-net and
Manifold gauge correspond?
Does indoor/outdoor EEV
Is there any clogged place in
the piping (ex. filter)?
During cooling operation,
does an outdoor fan, or indoor fan in case
of heating fan operate well?
Check the amount of refrigerant
Samsung Electronics
(Timer) (Fan)
Test operation
Yes
Yes
operate well?
Yes
No
Yes
(Filter) (Defrost)
•Motor driver defect or wire-breaking
• Defective SSR for fan control
• Defective fan motor capacitor or wire-breaking
Connect S-net and Manifold gauge
No
Open the service valve
No
Replace a high pressure sensor
No
Check the relevant EEV
Yes
No
Replace the relevant components
Troubleshooting
(imperative)
Check the piping
(motor or fan)
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