Daikin ComfortNet DX16TC Series Service Instructions Manual page 92

SERVICING
CHECKING COMPRESSOR EFFICIENCY
The reason for compressor inefficiency is broken or damaged
scroll flanks on Scroll compressors, reducing the ability of the
compressor to pump refrigerant vapor. The condition of the
scroll flanks is checked in the following manner.
1. Attach gauges to the high and low side of the system.
2. Start the system and run a "Cooling Performance Test. If
the test shows:
a. Below normal high side pressure.
b. Above normal low side pressure.
c. Low temperature difference across coil.
d. Low amp draw at compressor.
And the charge is correct. The compressor is faulty – re-
place the compressor.
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