Hitachi EV-1.5N1, Service Manual

Page: 172 / 480

6. Optional functions
158
SMGB0079 rev.0 - 01/2013
Cancellation of Outdoor Ambient Temperature Limit (
GS
)
Press “PSW1” and select the setting condition “0” to “3” at the cancellation of outdoor ambient temperature limit of “
GS
”.
Then, this function can be set.
The heating operation is continued under a high outdoor temperature or the cooling operation is continued under a low
temperature.
Setting condition* Operation mode for cancellation
0 Not available (default setting)
1 Heating
2 Cooling
3 Heating / Cooling
Cancelled Conditions for Outdoor Unit Ambient Temperature Limit
• Heating Operation
If one of following conditions is continued for 1 second, the unit will be under Termo-OFF.
- Ta > 23
o
C and Pd > 3.7 MPa
- Ta > 21
o
C, Ti > 26
o
C and Pd > 3.7 MPa
- Ta > 15
o
C, Ti > 29
o
C and Pa > 3.7 MPa
• Cooling Operation
If the following condition is continued for 1 second, the unit will be under Termo-OFF.
- Ta < -7
o
C
Ta: Outdoor Ambient Temperature
Ti: Indoor Air Inlet Temperature
Pd: Discharge Pressure
N O T E
If this function is set and the outdoor unit operates in the stoppage area for a long time, the outdoor unit may be
damaged since protection control is cancelled.
Change of defrost condition (
Jo
)
Press “PSW1” and select the setting condition “1” at the change of defrost condition “
Jo
”.
Example for RAS-(3-12)H(V)N(P/C)(E):
Setting condition
Standard Specifications (factory default state) Heating specification
Function selection setting Jo:0 Function selection setting Jo:1
Temperature
conditions under
defrosting
operation