Main Safety Devices - Hitachi UTOPIA IVX PREMIUM Serie Manual De Instrucciones

MAIN SAFETY DEVICES

Remote control switch
indication
The operation lamp
flickers. (1 time/1 sec.)
and the unit number and
alarm code 03 flicker.

The operation lamp
flickers. (1 time/2 sec.)
Indication of flicker
except above
The operation lamp
flickers. (1 Time/1s)
Unit number  , alarm
code and unit code

 flicker
Back to  after checking
Instructions for the recovery when the fuse of the transmission circuit is blown out:
1

Correct the wiring to the terminal board.
2
Set pin 2 of DSW7 on the indoor units PCB to ON
12 MAIN SAFETY DEVICES

Compressor Protection
High pressure switch:
This switch cuts out the operation of the compressor when the
discharge pressure exceeds the setting.

Fan Motor Protection
When the fan motor current is reached to the setting, motor
output is decreased.
The other way, when the fan motor current becomes lower,
limitation is cancelled.
16 PMML0398B rev.0 - 11/2015 - P5416651
Unit condition
The unit does not start.
The unit does not start.
The unit does not start, or start
once and then stops
The unit does not start.
Wrong portions
The power source of outdoor unit in
not turned ON.
The connecting wires of operating line
are incorrect or loosened.
Remote control cable is broken.
Contact of connectors is not good.
The connection of remote control
cable is incorrect
The connection of thermistor or other
connectors are incorrect. Tripping of
protector exists, or else.
The connection of the remote
control cable between indoor units is
incorrect.
Model
For Compressor
Pressure Switches
High
Low
for control
Fuse
1~ 230V 50Hz
CCP Timer
Setting Time
For Condenser Fan Motor
Internal Thermostat
For Control Circuit
Fuse on PCB
Inspection points after power source
OFF
1
Connecting order of each terminal
boards.
2
Screw fastening of each terminal
boards.
?
N O T E
Recovering method of FUSE for
operating circuit. There is a fuse
(FUSE4 on indoor unit PCB1, EF1
on outdoor unit PCB1) to protect
operating circuit on the PCB, when
the power lines are connected to
operating lines. If fuse is melted,
operating circuit can be recovered
once by setting the dip switch on the
PCB as shown in 
This is the same as item
Check by the abnormality mode table
in the Technical Catalogue (Do it by
service people).
Check by the abnormality mode table in
the Technical Catalog (Do it by service
people).
RAS-2HVNP1
RAS-2.5HVNP1
RAS-3HVNP1E
RAS-3HVRNS3
Automatic Reset, Non-
- Adjustable (each one for
each compressor)
Cur Out MPa
Cut-In MPa
Cut-Out MPa
Cut-In MPa
-
A
- Non-Adjustable
min.
Automatic Reset, Non-
- Adjustable (each one for
each motor)
A
 1 and 2
4.15
3.20
0.30
0.20
40
3
5