Frequency Regulating Functions; Starting Frequency Control - Daikin SkyAir Service Manual

SiBE28-804

4. Frequency Regulating Functions

4.1

Starting Frequency Control

Outline The inverter compressor will start up with a limited fixed frequency value for a specified period
of time in order to prevent liquid back to the compressor, and to limit the starting current.
General The normal starting control time is 2~3 minutes. The maximum starting frequency control time is
limited to 10 minutes.
During compressor start-up, a pressure difference will be build up in order to have sufficient
pressure difference for the 4-way valve to change over.
Graph
Ending condition The starting control will be terminated when the low pressure value < 6 bar or when the
maximum starting time of 10 minutes has been reached in case the low pressure value stays >
6 bar.
Functional Description
Hz
A Hz
Step 1
ON
RZQS71·100C7V1B
A Hz

Frequency Regulating Functions

Normal control
± 1 min
2~3 min
1 phase
RZQ71C7V1B
79 Hz
time
RZQ100~140C7V1B
RZQS125·140C7V1B
112 Hz
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