Hitachi RAS-(4-12)HNP(1)(E) - Protection and Safety Control; Compressor Protection; Safety and Control Device Setting for the Outdoor Units

5 Control System
144
SMGB0087 rev.0 - 12/2013
5.3 Protectionandsafetycontrol

Compressor protection
The following devices and their combinations protect the compressor
High-pressureswitch This switch cuts out the operation of the compressor when the discharge pressure exceeds the setting.
Oilheater
This band heater protects against the oil carry-over during the cold starting, as the band heater is energi-
zed while the compressor is stopped.
Fanmotorprotection
Internal thermostat that is embedded in the fan motor winding: this internal thermostat cuts out the opera-
tion of the fan motor when the temperature of the fan motor winding exceeds the setting. (only for some
RPI models)

Safety and control device setting for the outdoor units
Model
RAS-(2-2.5)HVNP1
RAS-3HVNC1
RAS-3HVNP1E RAS-(4-6)HVN(P/C)1E RAS-(4-12)HN(P/C)(1)(E)
For
com-
pressor
Pressure Switches Automatic Reset, Non-Adjustable (each one for each compressor)
High
Cut-Out MPa
4.15
05.0
15.0
−
−
4.15
05.0
15.0
−
−
4.15
05.0
15.0
−
−
4.15
05.0
15.0
−
−
Cut-In MPa
3.20
±0.15
3.20
±0.15
3.20
±0.15
3.20
±0.15
For fuse
control
1~ 230V 50Hz
A 25 40
50
(RAS-4HVNCE = 40)
3N~ 400V
50Hz
A
2 X 20
(RAS-(8-12)HN(P/C)
(E)=2x40)
CCP Timer
Setting Time
min.
Non-Adjustable
3 3 3 3
Discharge gas
Thermistor
ºC
115 (OFF) Cooling
115 (OFF) Heating
115 (OFF) Cooling
115 (OFF) Heating
127 (OFF) Cooling
120 (OFF) Heating
127 (OFF) Cooling
120 (OFF) Heating
For Condenser Fan
Motor
Internal Thermostat
Automatic Reset, Non-Adjustable (each one for each motor)
Cut-Out ºC - 120 120 120
For Control Circuit
Fuse Capacity on PCB
A 3 5 5 5