Automatic Controls - Hitachi SET FREE MINI RAS-3 Manuel D'installation

INDICATIONS IN ABNORMAL CONDITION
Abnormality
The RUN indicator (Red) blinks.
"ALARM" is indicated on the liquid crystal display.
The indoor unit number, the alarm code and the model code are indicated on
the liquid crystal display.
In the case that the plural indoor units are connected, the above items for
each indoor unit are indicated one by one.
Check the contents of the indications and contact your service contractor of
HITACHI.
Power Failure
All the indications are OFF.
Once the unit is stopped by power failure, the unit will not be started again
although the power recovers. Perform the starting procedures again.
In case of instantaneous power failure within 2 seconds, the unit will be
started again automatically.
Electric Noise
There could be a case that all the indications are OFF and the unit is
stopped. This is occurred by the activation of the micro computer for the unit
protection from the electric noise.
NOTE:
In case of using wireless, remote control switch for the wall type indoor unit,
remove the connectors (CN25) connected to the indoor PCB. If not removed,
the unit can not operated.
The memorized date can not be erased unless the remote control switch is
initialized.

6. AUTOMATIC CONTROLS

The system is equipped with the following functions.
THREE MINUTE GUARD
The compressor remains off for at least 3 minutes once
it has stopped. If the system is started within
approximately 3 minutes after it has stopped, the RUN
indicator is activated. However, the cooling operation or
the heating operation remains off and does not start
until after 3 minutes has elapsed.
FROST PREVENTION DURING COOLING
OPERATION
When the system is operated in a low temperature
room, the cooling operation may be changed to fan
operation for a while to avoid frost formation on the
indoor heat exchanger.
AUTOMATIC RESTART AFTER POWER
FAILURE
If the power supply is interrupted for short periods of
time (up to 2 seconds) the Remote Control switch will
retain the settings and the unit will restart when the
power is restored.
If Automatic Restart is required after periods of lost
power supply in excess of 2 seconds please contact
your distributor (optional function).
AUTOMATIC CONTROLS
Indoor Unit Number
COOL MED
A/C
Indicated
for a
second
alternately
COOL
MED
A/C
Model Code
SLOW AIR CONTROL DURING HEATING
OPERATION
When the compressor is stopped while the thermostat
is OFF, or the system is performing the automatic
defrosting operation, the fan speed is set at the slow
position.
AUTOMATIC DEFROSTING CYCLE
When the heating operation is stopped by pressing
RUN/STOP switch, frosting on the outdoor unit is
checked and the defrosting operation may be
performed for the maximum of 10 minutes.
PREVENTION OF OVERLOAD OPERATION
When the outdoor temperature is too high during
heating operation, heating operation is stopped due to
activation of the outdoor thermistor until the
temperature becomes low.
HOT START DURING HEATING OPERATION
To prevent cold air discharge, the fan speed is
controlled from the slow position to the set position
according to the discharge air temperature. At this time
the lover is fixes horizontally.
COMPRESSOR HOT START
FSVNE Series does not operate wihin 4 hours after
power supply (stopagge code dl-22).
In case of operating within 4 hours, see "Test Run"
chapter.
6
9
Refrigerant
Cycle Number
Alarm
Code
  

ADDS RN
ABNL


ABNL
Alarm
Code
Connected
Number
of Inddor Units