Daikin FTX25JVEA9, Service Manual

Page: 182 / 410

Si18-201 System control
Main Functions 169
3.40 Protection Control of SkyAir Indoor Units
SkyAir Indoor
Unit Peak-Cut
Zone The zones for SkyAir indoor unit peak-cut control is produced in the BP unit.
Peak-cut control
Based on the heat exchanger temperature information sent from the indoor unit, the zones are
produced to prevent abnormal rise of the high pressure.
Freeze-up prevention control
Based on the freeze-up prevention status information sent from the BP unit (indoor unit), the
zones are produced to prevent freezing-up of the indoor heat exchanger.
Even if the stop zone is reached, the zone remains as the drooping zone for 540 sec.
DCPC5 : 68˚C
DCPC4 : 56˚C
DCPC3 : 54˚C
DCPC2 : 52˚C
DCPC1 : 50˚C
Stop zone
Drooping zone
No-change zone
Increasing zone
Reset zone
(M1053)
Stop zone
Drooping zone
No-change zone
Increase zone
Reset zone
DCTO1 : 11˚C
DCTO2 : 7˚C
DCTO3 : 4˚C
DCTO4 : 2˚C
DCTO5 : 0˚C
(M1054)