Hitachi UTOPIA RAS-4HVRP2E - Change of Defrost Condition (Jo)

6 Optional functions
RAS-3HVRC2
SMGB0136 rev.0 - 07/2021
117
6
6.1.3.6 Change of defrost condition (J)
These optional function is available for being selected using the PSW switches and 7-segment on the PCB:
This function allows to shift the temperature conditions in order to cause an earlier defrosting.
It is useful in installations placed in very cold regions, where frost generates continuously; enabling an earlier defrosting
operation results in a lower amount of accumulated frost, therefore keeping higher heating capacity values.
Press “PSW1” and select the setting condition “1-4” at the change of defrost condition “J”.
Setting condition Operation mode
0 Not available (default setting)
1 Defrost for Cold Area
2 Defrost for Warm Area
3 Defrost for Extreme Cold Area 1
4 Defrost for Extreme Cold Area 2
Example of setting:
Setting condition
Standard Specications (factory default state) Heating specication
Function selection setting J:0 Function selection setting J:1
Temperature
conditions
under defrosting
operation
Defrosting
operation
start area
Defrosting
operation
stop area
Outdoor
temperature
(ºC)
Outdoor evaporating
temperature (ºC)
(pipe)
Outdoor
evaporating
temperature (ºC)
(pipe)
Defrosting
operation
stop area
Defrosting
operation
start area
Outdoor
temperature
(ºC)
Function selection setting J:2
-2
-5
-10
-15
-2
9
Outdoor
evaporating
temperature (ºC)
(pipe)
Defrosting
operation
stop area
Defrosting
operation
start area
Outdoor
temperature
(ºC)