Samsung AVXCSH023/032/040CE, Service Manual

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Troubleshooting
4-90 Samsung Electronics
4-3-55 : Low-amperage error of Compressor
No signal
• Compressor breakdown/defective CT sensor/OLP Trip
• Display the error when the CT sensor value of the relevant compressor is below 4A for five hours or more.
When it operates as 1A for more than 1 minute, reset timer
Indoor unit display
Criteria
Cause of problem
Outdoor unit display
1. How to check
Are CT values during
operation less than 4A?
Check and complete
If the compressor works fine
during operation, it does not have
any problem.
If not, the compressor is broken
Is the resistance
of CT sensor connector
normal?
Are the CT values
during the stop of compressor
all “0”?
Does the compressor
stop operating even with
the contact of a magnetic
contactor?
Are the values from
an independent ammeter
and that of CT sensor
identical?
Test operation
Replace the CT sensor
Replace the CT sensor
Replace the CT sensor
Check the magnetic contractor.
Check if it is OLP Trip. If it is due to a
compressor breakdown, replace
compressor.
Connect a separate ammeter
(optional)
No
No
No
Yes
Yes
Yes
Yes
Yes
No
No
(Compressor 1, Compressor 2, Compressor 3)