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Cooling
High pressure
Low pressure
Frequency
High pressure
gradually rises with
increase in
frequency.
Subcooling degree
becomes higher.
(Liquid connection
pipe temperature
lowers.)
Low pressure rises due
to decreased
compressor output.
High pressure
Low pressure
Frequency
Heating
The outdoor unit electronic expansion valve
is closed due to the overload control.
Frequency comes to
the minimum level.
(High pressure is maintained
at a constant level.)
Low pressure rises
due to decreased
frequency.
To maintain high pressure,
frequency decreases under the
capacity control.
High pressure drops or rises
immediately after the overload
control is complete.
Low pressure drops due to
closed outdoor unit
electronic expansion valve.
Hot gas bypass is activated
for low pressure protection,
i.e., hunting at low pressure.
Higher degree of overcharge
(Degree of overcharge)
Proper amount
To maintain low pressure, frequency
increases under the capacity
control.
Frequency comes to
the minimum level.
High pressure
dropping control
(Low pressure is
maintained at a
constant level.)
Summary of Contents for SkyAir RZQ-TA Series
Page 1: ...Service Manual Cooling Only 60 Hz Heat Pump 60 Hz RZR TA RZQ TA Series SiUS281811E...
Page 283: ...6L86 3DUW SSHQGL LULQJ LDJUDPV 2XWGRRU 8QLW QGRRU 8QLW Part 7 Appendix...
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