12-3. Check Procedure to Search Cause of Compressor
Oil Shortage
Are there
any miswiring or incorrect
connection of TK1,
TK2, TK4 and
TK5 sensor in the unit that has
replaced compressor?
Are the balance pipes of
all outdoor units connected to the
same refrigerant line fully open?
Are the
characteristics of the TK1,
TK2, TK4 or TK5 sensors of the unit
that has replaced compressor
correct?
(To next page)
No
No
No
Yes
Correct the miswiring or connection.
TK1: CN531 TK2: CN532
TK4: CN534 TK5: CN535
Yes
Yes
With the compressor(s) disconnected,
check the oil circuit in accordance
with the procedure described below.
Open the balance pipe valves fully.
Replace the troubled sensor.
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