Compressor frequency soon after starting
is controlled as shown below.
When it is first start after switching on a breaker, Pattern II is applied.
30 rps
60 sec
AOU24RGLX
AOU30RGLX
47 rps
60 rps
Frequency
Pattern I
Condition
(Normal)
In Cooling or dry operation
In Heating operation within
3 hours after compressor stop
and compressor bottom
thermistor is over 89.6°F (32˚C)
Defrost operation
Start after defrosting
Pattern II
Condition
(Oil and refrigerant are mixed
in compressor)
In Heating operation
over 3 hours after
compressor stop
or compressor bottom
thermistor is under 89.6°F (32˚C)
120 sec 180 sec
Time
30 rps
60 sec
47 rps
60 rps
Frequency
180 sec 240 sec
Time
04-01
1. COMPRESSOR CONTROL
1. COMPRESSOR FREQUENCY AT STARTUP