Defrosting Start / Release Request Judgement; Defection Process Diagram - Hitachi RAF-25NH4 Service Manual

<< 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. Defection process diagram

¥ During heating mode (other than defrosting)
¥ During defrosting mode
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
Stop
temperature
Start
temperature
Start temperature
Defrosting start request
Heating (other than defrosting)
Thermal hysteresis of 2ûC (H' 06)
Defrosting start area
Defrosting stop request
Defrosting stop area Defrosting stop area
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Start temperature + 2ûC (H' 06 = 0.12V)
Defrosting stop request
Stop temperature
Defrosting