Safety Protection And Control Device; Indoor Unit; Outdoor Unit - Hitachi RAS-H(V)RNME-AF Service Manual

5 Control system

5.3 Safety protection and control device

5.3.1 Indoor unit

MODEL
For Electric Heater
Surface Thermostat
Thermal fuse
Fuse capacity
For Water circulation
Low water pressure switch
Open
Close
High water pressure
Low water flow switch
Open
Pump feedback
For water temperature
High temperature protection
Freeze temperature protection
For refrigerant temperature
Freeze temperature protection
For the control circuit
Fuse capacity
For the water pump
Fuse capacity

5.3.2 Outdoor unit

MODEL
High pressure switch
For
Cut-out
compressor
Cut-out
1~ 230V 50Hz
Fuse
3N~ 400V 50Hz
For control
CCP timer setting
time
For condenser fan motor
Internal thermostat
DC Cut-out
Cut-out
AC
Cut-in
For control circuit
Fuse capacity on PCB
118
SMGB0070 rev. 1 - 08/2011
RWM-(2.0/3.0)FSN3E
Manual reset, Non-adjustable (one per unit)
Non-reset (needs to be replaced), Non-adjustable (one per unit)
6A
12 l/min ±15 % contact opens with decreasing flow
+5ºC of Maximum water temperature (Heating mode)
-3ºC of minimum water temperature (Cooling mode)
RAS- RAS-
2HVRN2 3HVRNME-AF
MPa
25 40
A
- -
min
Automatic reset, non-adjustable (each one for each motor)
- -
ºC - -
- -
A 3
RWM-(4.0-6.0)FSN3E
75ºC±5%
110ºC +0 -5%
12A
Automatic reset
1 bar
1.5 bar
3 bar
Automatic reset
Input ON when relay ON
Tl<-20ºC (for 30 seconds)
5A (Inside PCB)
3.15A
RAS- RAS-
4H(V)RNME-AF (5/6)H(V)RNME-AF
Automatic reset, non-adjustable
-0.05
4.15
-0.15
3.20±0.15
40 50
2x20 2x20
Non adjustable
3
- -
- -
- -
5
RWM-(8.0/10.0)FSN3E
16A
RAS-
(8/10)RNME-AF
-
40
120±5
150±5
96±15
5 (PCB1 and PCB5)
10 (PCB3)