Toshiba Carrier TCB-IFDMR01UP-UL Guide page 43

8.
Control Outline
8-1. Cautions regard with DDC's programing
(1) Operation Start
- Capacity control signal(analogue input voltage) should be output after the AHU's fan operating.
Then, recommend to keep more than 50%(Heating; 40%) Capacity control signal during 5 mins.
- To protect the compressor, for 5 mins after operation start the compressor will continue to operate even if
receives "Zero" Capacity control signal.
(2) Freeze prevention control (Low temperature release)
- When the compressor(s) stopped by Freeze prevention control, it will re-start after maximum 20 mins depends on
DX-COIL condition.
(3) Recovery control
- Both refrigerant recovery and oil (lubricant) recovery control during cooling and heating operation.
When RSW503,504 is set as [3], when recovery control starts output signal will be from *DO5/DO5,*DO6/DO6.
Please check outdoor units' Service Manual for more detail.
(4) Defrost control (Full Defrost)
- Defrost control is designed to performed according to the amount of frost on the outdoor unit's time.
heat exchanger or the accumulation of operation
When defrost control starts, output signal will come from *DO4/DO4.
Please check outdoor units' Service Manual for more detail.
(5) Compressor restart prevention timer
- If the compressor(s) is stopped by Capacity control or protection function(except Freeze prevention control),
normally the compressor will continue to stop for 2 mins 30 secs, even if receives Capacity control signal.
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EN