Hitachi RAS-25QH1 Technische Information Seite 103

<<Defrosting Start/Release Request Judgment>>
The microcomputer retrieves temperature data from the heat exchange sensor data; it senses
that defrosting starts when the operation mode is heating(other than defrosting), and that
defrosting stops when it is still defrosting. ;
Defrosting start temperature: DEF-ON (EEPROM)
Defrosting stop temperature: DEF-OFF (EEPROM)
1. Detection process diagram :
* During heating mode (other than defrosting)
Defrosting stop request
Start temperature + 2°C (H' 06=0.12V)
Start temperature
Defrosting start request
- During defrosting mode
Defrosting stop request
Stop temperature
Note: Even if defrosting start request is issued, defrosting will not commence until the
defrosting inhibit time (FLGSET: EEPROM) has passed after operation starts.
Operation mode tetine an detrosting) Defrosting
—>
Heat-exchanger temperature
Le Thermal hysteresis of 2'C (H' 06)
Start
temperature
- 110-