Main Safety Devices - Hitachi UTOPIA IVX PREMIUM Manual De Instrucciones

MAIN SAFETY DEVICES

Remote Control
Switch Indication
The operation lamp
flickers. (1 time/1 sec.)
And the Unit Nº 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 Nº 00 , Alarm Code
and Unit Code
 00
flicker
Back to  after checking
Instructions fot the recovery when the fuse of the transmission
circuit is blown out:
1
 Correct the wiring to the terminal board.
2
Set the 1st pin of DSW7 on the indoor unit 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 thermistor temperature is reached to the setting,
motor output is decreased.
The other way, when the temperature becomes lower, limitation
is cancelled.
18 PMML0397B rev.0 - 11/2015 - P5416650
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 (3N~ 400V 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
Board.
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  1 and 2
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-12HN(P/C)
Automatic Reset, Non-
Adjustable (each one for
each compressor)
Cut-Out Mpa 4.15
Cut-In MPa 3.20
Cut-Out MPa 0.30
Cut-In MPa 0.20
A 40
- Non-Adjustable
min. 3
Automatic Reset, Non-
Adjustable (each one for
each motor)
A 5