Hokkaido HFII 351 XR User manual

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CONSOLE TYPE AIR CONDITIONERS
(MONOSPLIT SYSTEMS, AIR-TO-AIR, HEAT PUMP)
WARNING!
PLEASE READ CAREFULLY THIS MANUAL BEFORE OPERATING YOUR NEW AIR CONDITIONER.
R410A
USER'S MANUAL
"Commercial DC Inverter" Models
HFII 351 XR
HFII 531 XR
SET TEMPERATURE C)
O
AUTO
COOL
DRY
HEAT
FAN
HIGH
MED
LOW
TEMP.
MODE ON/OFF
FAN SPEED
SWING
ECONOMIC
TIMER ON
RESET
LOCK
TIMER OFF
AIR DIRECTION
POWERFUL

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Table of Contents
GENERAL INFORMATION ...................................................................................................... 3
SAFETY PRECAUTIONS......................................................................................................... 6
OUTLINE OF INDOOR & OUTDOOR UNITS.........................................................................11
LED INDICATORS ON INDOOR UNIT .................................................................................. 12
IR REMOTE CONTROLLER.................................................................................................. 13
HEAT, COOL, FAN MODES ................................................................................................... 17
DRY MODE ............................................................................................................................ 18
AUTO MODE.......................................................................................................................... 19
TIMER FUNCTION.................................................................................................................20
"ECO" (ENERGY SAVING) MODE ........................................................................................ 23
"POWERFUL" MODE............................................................................................................. 24
SELECTING THE AIR OUTLET DIRECTION ........................................................................ 25
ADJUSTING THE AIRFLOW DIRECTION............................................................................. 27
EMERGENCY OPERATION & TEST SWITCH...................................................................... 29
ORDINARY MAINTENANCE AND ADVICE FOR USE.......................................................... 30
TROUBLESHOOTING ........................................................................................................... 36
AUTOMATIC RESTART AFTER A POWER FAILURE........................................................... 39

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GENERAL INFORMATION
Outline of specific features
ECO-FRIENDLY REFRIGERANT R410A
As R410A refrigerant contains no chlorine, it does not damage ozone.
POWER CONTROL THROUGH "DC INVERTER"
Power is supplied according to real needs of comfort, thus permitting a sure energy saving.
INFRARED REMOTE CONTROLLER
All available functions of the air conditioner can be set by using the infrared remote controller,
whose LCD panel immediately shows the operating parameters.
ON TIMER / OFF TIMER
ON Timer, allows to program the air conditioner's start within 24 hours. If the set time does not
exceed 10 hours, the TIMER ON is set by 0.5 hours' steps. If the set time exceeds 10 hours,
the TIMER ON is set by 1 hour's steps.
OFF Timer, allows to program the air conditioner's stop within 24 hours. If the set time does not
exceed 10 hours, the TIMER OFF is set by 0.5 hours' steps. If the set time exceeds 10 hours,
the TIMER OFF is set by 1 hour's steps.
The air conditioner's start and/or stop may also be programmed in sequence, within 24 hours.
DRY FUNCTION
When "DRY" function is selected, the air conditioner strongly reduces humidity inside the room,
and also keeps the room temperature at a constant value.
ADVANCED CONTROL FOR INDOOR UNIT'S FAN
Thermostatic stops. In Heating mode, when set temperature has been reached inside the
room, the compressor stops and the indoor fan speed is lowered to avoid cold drafts.
Hot Keep. At the beginning of operation in Heating mode, the indoor fan will start only 5 minutes
later, i.e. when the temperature of indoor heat exchanger is adequate.
MICROCOMPUTER CONTROLLED DEFROSTING FUNCTION (HEATING MODE)
The microcomputer on printed circuit board can monitor all decreases in heating power of the air
conditioner caused by frosting on outdoor heat exchanger, and inputs the signal for automatic
defrosting; a LED lights up when this function is activated.

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GENERAL INFORMATION
THERMOSTAT UNDER MICROCOMPUTER CONTROL
The thermostat being controlled by microcomputer allows remarkable energy saving and provides
more comfort, as the room temperature is checked with the greatest precision.
INDOOR FAN AUTOMATIC SPEED CONTROL
The airflow from the Indoor Unit can be controlled step by step, on the basis of the difference
between the room temperature and the set temperature. This allows to reduce the lapse of
time needed to reach the desired temperature both in Cooling and Heating mode, by treating
the appropriate air volumes.
MOTORIZED LOUVERS FOR AIRFLOW DIRECTION
The flaps can be controlled directly by the remote controller so as to reach your desired
position.
• By pressing "AIR DIRECTION" button, you can select your desired angle for vertical airflow
louver. Once the angle has been selected, the position is memorized by the inner electronics
for next start of the air conditioner.
• If you press "SWING" button, the flaps move up and down continuously, thus increasing air
circulation inside the room.
AUTORESTART AFTER A POWER FAILURE
• When a power failure occurs during operation, the air conditioner immediately stops.
• When power is restored, "OPERATION" lamp starts blinking. In particular, the air conditioner
will automatically restart after 3 minutes have elapsed since power is restored. This means that
it is not required to press "ON/OFF" button on the remote controller. The settings will be the
same as before the blackout.
DIAGNOSTIC & PROTECTIVE FUNCTIONS
Shown by codifed flashing of LED indicators on the Indoor Unit, they allow to diagnose in a quite
procise way the main malfunctions which may concern the air conditioner.
3-minutes' delay protection: there is a protective control of the Outdoor Unit, to prevent
compressor's damages after stops. This control is effective in case of malfunction, power failure,
turning off the system, etc. and it does not allow Outdoor Unit to restart before 3 minutes have
elapsed since the Unit stopped. During this time, Indoor Unit cannot run.

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Recommended operating conditions
In order to obtain the Unit's best performances, it is recommended its use under the following
conditions:
Use of air conditioner out of the above mentioned temperature ranges could cause the intervention
of built-in protective functions consequently stopping the system operation.
NOTE: If the Units operates in rooms which are satured with oil vapors or volatile matters,
harmful substances could coat and clog the Indoor Unit's heat exchanger. Besides, scalings of
saltness could form on the Outdoor Units installed in sea-surroundings; if not removed, they will
damage the Units in a very short time. In both cases, contact the Authorized Technical Service
to require frequent maintenance.
GENERAL INFORMATION
Outdoor temperature: HFII 351XR Model:
HFII 531XR Model: -15°C to 43°C
0°C to 43°C
Room temperaure: 17°C to 32°C
COOLING OPERATION CAUTION:
Room relative humidity should be less than 80%. If the air conditioner operates
beyond this limit, the surface of the heat exchanger could get covered with frost.
Outdoor temperature: -15°C to 21°C
HEATING OPERATION Room temperature: 0°C to 30°C
DRY OPERATION Outdoor temperature: 11°C to 43°C
Room temperature: 17°C to 30°C