Control Specification (09/12 Class) - Daikin FTXS09HVJU Service Manual

SiUS04-904
Detail
How to Determine Frequency
The compressor's frequency is determined by taking the following steps:
1. Determine command frequency
 Command frequency is determined in the following order of priority.
1.1 Limiting defrost control time
1.2 Forced cooling
1.3 Indoor frequency command
2. Determine upper limit frequency
 Set a minimum value as an upper limit frequency among the frequency upper limits of the
3. Determine lower limit frequency
 Set a maximum value as an lower limit frequency among the frequency lower limits of the
4. Determine prohibited frequency
 There is a certain prohibited frequency such as a power supply frequency.
Function and Control
following functions:
Compressor protection, input current, discharge pipe temperature, heating peak-cut, freeze-up
protection, defrost.
following functions:
Four-way valve operation compensation, draft prevention, pressure difference stabilization .

Control Specification (09/12 Class)

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