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12-3.Check procedure to search cause of compressor oil
shortage
Are the balance pipes of
all outdoor units connected to the
same refrigerant line fully open?
Are there
any miswiring or incorrect
connection of TK1, TK2, TK3, TK4 and
TK5 sensor in the unit that has
replaced compressor?
Are the
characteristics of the TK1,
TK2, TK3, TK4 or TK5 sensors of the
unit that has replaced compressor
correct?
With the compressor(s) disconnected,
check the oil circuit in accordance
with the procedure described below.
Replace the faulty sensor.
Open the balance pipe valves fully.
Correct the miswiring or connection.
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