Hitachi RPS-140AN User manual

65MP3192
IMPORTANT:
READ AND UNDERSTAND THIS
INSTRUCTION MANUAL BEFORE
USING THIS AIR CONDITIONER.
KEEP THIS MANUAL FOR FUTURE
REFERENCE.
Models :
Indoor Unit Outdoor Unit
RPS-140AN + RAM-140FPS/
RAM-140FPSB
HITACHI PACKAGED-TYPE AIR CONDITIONERS
─INVERTER DRIVEN ─
─AIR-COOLED TYPE ─
Installation, Operation and Maintenance
INSTRUCTIONS MANUAL

IMPORTANT NOTICE
●HITACHI pursues a policy of continuing improvement in design and performance of its
products. Specification/Design are subject to change without prior notice.
●HITACHI cannot anticipate every possible circumstance that might involve a potential
hazard.
●This air conditioner is designed for standard air conditioning only. Do not use for other
purposes such as drying clothes, refrigerating foods or for any other cooling process.
●The installer and system specialist shall secure safety against leakage according to local
Regulations or standards.
●No part of this manual may be reproduced without written permission.
●Signal words (DANGER, WARNING and CAUTION)are used to identify levels of hazard
seriousness. Definitions for identifying hazard levels are provided below with their
respective signal words.
Immediate hazards which WILL result in severe personal injury or
death.
Hazards or unsafe practices which COULD result in severe personal
injury or death.
Hazards or unsafe practices which COULD result in minor personal
injury or product or property damage.
Useful information for this operation and/or maintenance.
●If you have any questions, contact your installer, dealer of HITACHI or our customer care.
●This manual gives you description and information on how to operate this air conditioning unit.
●This air conditioner has been designed from the following temperatures.
Indoor Temperature ( oC ) Outdoor Temperature ( oC )
Maximum Minimum Maximum Minimum
32DB/23WB 21DB/15WB 43DB 21DB
This manual should be considered as a permanent part of the air conditioning equipment
and should remain with the air conditioning equipment.
：
▲DANGER
！
▲WARNING
！：
NOTE ：
▲CAUTION
！：

—CONTENTS —
No. Item Page
Operation Instructions...................................................................................... 1
1. PREPARATION
1.1 Installation Location............................................................................................ 10
1.2 Installation Space............................................................................................... 10
1.3 Foundation.......................................................................................................... 12
1.4 Unit Check.......................................................................................................... 12
2. INSTALLATION
2.1 Anti-tumbler for Indoor Unit ................................................................................13
2.2 Anti-tumbler for Outdoor Unit.............................................................................. 14
3. REFRIGERANT AND DRAINAGE PIPING
3.1 Preparations....................................................................................................... 15
3.2 Refrigerant Piping............................................................................................... 16
3.3 Drainage Piping.................................................................................................. 17
4. EVACUATION AND REFRIGERANT CHARGE
4.1 Evacuation Procedures ...................................................................................... 18
4.2 Refrigerant Charge............................................................................................. 18
5. ELECTRICAL WIRING
5.1 Schedule Check ................................................................................................ 19
5.2 Main Power Wiring Procedures.......................................................................... 19
5.3 Main Power Wiring Specification........................................................................ 20
5.4 Control Wiring..................................................................................................... 20
5.5 Grounding Specification ..................................................................................... 20
6. TEST RUNNING
6.1 Final Installation Check ...................................................................................... 21
6.2 Preparation......................................................................................................... 21
6.3 Test Running...................................................................................................... 21
6.4 Safety and Control Device Setting...................................................................... 22
7. MAINTENANCE.................................................................................................. 23
7.1 Components ..................................................................................................... 23
7.2 Lubrication.......................................................................................................... 23
7.3 Refrigerant Charge............................................................................................. 23
7.4 Compressor Removal......................................................................................... 23
7.5 Start-Up After Extended Shutdown .................................................................... 24
7.6 Replacement of Parts......................................................................................... 24

Operation Instructions
- 1 -
Operation Instructions
◆Name of Parts
OUTDOOR UNIT
Horizontal Louve
r
Vertical Louver
Air Outlet
Front Cove
r
Air Inlet
Air Outlet
Air Inlet Liquid Refrigerant
Piping
Gas Refrigerant
Piping
Power Supply
Main Circuit
Breaker
Leakage Breaker
Field and Control
Wiring
INDOOR UNIT

Operation Instructions
- 2 -
Operation Instructions
◆Precautions on Usage
Never use metal or copper wire as a fuse to
avoid fault or occurrence of fire hazard.
Please use fuse/circuit breaker with
proper amperage.
It may cause fire.
Don’t spray flammable gas toward the
air conditioner. Overloaded heat source should be reduced.
If there are heat sources which exceeds the air
conditioning capacity in the room (room with many
people entering or when using heat producing
appliances), set room temperature can not be
reached.
Set up window curtains or window blinds.
It can insulate the
heat source
coming through
the windows.
It may cause accidents and may injure
and damage the units.
Don’t insert any material into the air
inlet and air outlet.
During cooling operation,
please don’t open
windows, entrances and
exits unless necessary
and minimize as possible
the number of persons
entering or leaving the
room.
Doors or windows should be closed
properly to prevent the cooled air to leak
outside the room.
The setting of room temperature should be
suitable.
Adjust the temperature setting button
to a suitable index to maintain the
most comfortable temperature. Too
high or too low temperature will
cause discomfort. ( a temperature
difference of 5 oC to 7 oC between
the indoor and the outdoor is
appropriate)
When there is possibility of lightning strike.
When there is a possibility of lightning strike, turn the
unit off to protect the air conditioner, and switch off
the power switch. Make sure that the unit is provided
with
g
round.

Operation Instructions
3
Operation Instructions
◆Remote Control Switch Functions
Press switches only with fingers. Do not press switches by any other item, as it may break switches.Do not
touch the CHECK switch. This switch is only for servicing. If touched, press the CHECK switch again to
reset.
●Temperature Setting
When the TEMP switch is pressed, temperature increases by 1 degree. The minimum setting indication is 19℃
and the maximum setting indication is 30℃.
●Set and Actual Temperature
The set temperature is for the air temperature at the sensor (thermistor) of the indoor unit.
The actual room temperature may be different from the air temperature of the sensor due to the difference of
the sensing location.
●Touching Type Switches
This control switch is for touching type.
Slightly press the switch by finger. The operation can be checked by the liquid crystal display.
NOTE !
The figure in Fig. below shows all the indications for easy understanding. Therefore, during normal operation, only
some of them are indicated in the Liquid Crystal Display Section.
(HEAT : NO FUNCTION)
`
ㄊWwuuuWired Remote Control Switch (PC-AR)
！
▲CAUTION
！
Operation Mode Indicator
(HEAT:NO FUNCTION)
Wired Remote Control Switch (PC-AR)

Operation Instructions
4
Operation Instructions
◆Before Operation
Supply electrical power to the system for
approximately 12 hours before start-up after long
shutdown. Do not start the system immediately
after power supply, it may cause a compressor
failure, because the compressor is not heated well.
When the system is started after a shutdown longer
than approximately 3 months, it is recommended that
the system be checked by your service contractor.
Turn OFF the main switch when the system is stopped
for a long period of time. If the main switch is not
turned OFF, electricity is consumed, because the oil
heater is always energized during compressor
stopping.
◆Operation Method
(Cooling , Dry and Fan Operations)
＊Function
●Cooling Operation：To decrease the room
temperature
●Dry Operation：To decrease the humidity in the room
●Fan Operation：To circulate the air in the room
ATTENTION
The recommendable set temperature is as follows;
●Cooling Operation…26~28℃
● Dry Operation…23~25℃
Turn ON the power supply
" The vertical lines appear on the liquid crystal display. "
" A/C or VENTI is indicated on the liquid crystal display "
Step 1
Press the MODE switch.
By repeatedly pressing the MODE switch, the
indication is changed in order of COOL, DRY and FAN.
(lndication when setting "COOL" mode)
Step 2
Press the RUN/STOP switch.
The RUN indicator (Red Lamp) is ON. The system is
automatically started.
NOTE
Setting of Temperature, Fan Speed and Air Louver
Direction
The setting condition is memorized after setting once,
therefore the daily setting is not required. In case that
the setting is required to be changed, refer to the
Adjustment of swing louver direction in page 7.
Stop
Press the RUN/STOP switch again. The RUN indicator
(Red Lamp) is OFF. The system is automatically
stopped.
▲CAUTION
！

Operation Instructions
5
Operation Instructions
◆Setting Method
(Temperature, Fan Speed and Air Louver Direction)
ATTENTION
DO NOT touch the CHECK switch.
●The CHECK switch is used only when servicing.
●In case that the CHECK switch is pressed by
mistake and the operation mode is changed to the
check mode, press the CHECK switch again for
approximately 3 seconds, and press the CHECK
switch once again after 10 seconds, and the
operation mode is changed to the normal condition.
Setting of Temperature
Adjust the temperature by pressing TEMP "∧" or "∨"
switch.
(Indication when setting 28℃)
The temperature is increased by 1℃by pressing "∧"
switch (Max.30℃).
The temperature is decreased by 1℃by pressing "∨"
switch (Min.19℃).
Setting of Fan Speed
Press the FAN SPEED switch.
(Indication when setting " MED " speed)
By repeatedly pressing the FAN SPEED switch, the
indication is changed in order of HIGH, MED and
LOW.
For standard operation, set the fan speed at HIGH.
NOTE
In case of DRY mode, the fan speed is automatically
changed to LOW, and can not be changed (However.
the indication shows the present setting condition.).
Setting of Swing Louver Direction
Press the SWING LOUVER switch, the swing louver
starts to swing.
Press the SWING LOUVER switch again, the swing
louver is fixed.
By repeatedly pressing the SWING LOUVER switch,
the swing louver repeats to stop and swing.
< When Swinging Automatically >
The indications move continuously corresponding to
the louver swing.

Operation Instructions
6
Operation Instructions
◆Timer Operation
＊Function
●This Function is used to start or stop operation after
a set time.
●The timer operation can be set by the ON/OFF
TIMER switch.
" ON TIMER "
：Press the ON/OFF TIMER switch when the system is
stopped. The operation is started after a set time.
" OFF TIMER "
：Press the ON/OFF TIMER switch when the system is
operated. The operation is stopped after a set time.
Step 1
Press the ON/OFF TIMER switch.
(Indication when setting "ON TIMER")
" ON TIMER " is indicated in case that the system is
stopped.
" OFF TIMER " is indicated in case that the system is
operated.
Step 2
Press the TIME △or ▽switch, and set your
required time.
(Indication when setting 8.5 hours for timer operation)
●The set time is increased by 0.5 hours by pressing
the △switch (Max. 72.0 hours) and decreased by
0.5 hours by pressing the ▽switch (Min.0.5hours).
●In case that the required time is not set, the set time
is automatically indicated at 8.0 hours.
Cancel
Press the ON/OFF TIMER switch again.
◆Ventilation
＊Function
●A/C (Air Conditioning)：To operate the air conditioner
individually.
●VENTI (Ventilation)：To operate the total heat
exchanger unit individually.
●A/C + VENTI：To operate the air conditioner and the
total heat exchanger together.
＊RPS-5AN has no function of ventilation
ATTENTION
●This function is available only when the total heat
exchanger is connected.
When the procedures below are performed without
the total heat exchanger connected, " NO
FUNCTION " flickers for 5 seconds.
Ventilation
Press the VENTI switch.
(Indication when setting " A/C + VENTI ")
By repeatedly pressing the VENTI switch, the
indication is changed in order of A/C, VENTI and A/C +
VENTI.

Operation Instructions
7
Operation Instructions
◆Automatic Control
The system is equipped with the following functions.
NOTE
Except for a long period of shutdown, keep the main
power switch ON. The drain discharge mechanism is
operated if the drain level is higher than the setting.
●Three Minute Guard (Enforced Stoppage)
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 remains off and
does not start until after 3 minutes has elapsed.
●Three Minute Guard (Enforced Operation)
If all indoor units of the system are Thermo-OFF
within approximately 3 minutes after compressor
has started, compressor is operated during 3
minutes continuously.
However, if all indoor units of the system are
stopped by remote control switch, compressor is
●Frost Prevention During Cooling Operation
When the indoor unit is operated at low discharge
air temperature, the cooling operation may be
changed to fan operation for a while to avoid frost
formation on the indoor heat exchanger.
●Slow Air Control During Defrosting Operation
When the outdoor unit is performing the automatic
defrosting operation, the indoor fan is stopped and
the louver is fixed horizontally.
NOTE
If the system is stopped due to a power failure, it will
not automatically start again although power is
restored.
Repeat the start-up procedure from Step 1 to start the
system. In the event of a very brief power failure (2
seconds maximum), the settings are memorized.
Therefore, the system starts automatically after
approximately 3 minutes.
stopped.
●Oil Return Operation
If an indoor unit is stopped more than 2 hours
continuously, this function is operated during a few
minutes.
It has this function to prevent to accumulate in the
heat exchanger of stoppage indoor unit at cooling
operation.

Operation Instructions
8
Operation Instructions
◆Other Indications
＊Indications When in Normal Condition
Defrost
When the defrost operation is performed.
●" DEFROST " indication is ON.
(indication is ON)
The indoor fan is slowed down and stopped.
The louver is fixed at the horizontal position. However,
the louver indication of LCD continues to activate.
When the unit is stopped during defrost operation,
●The RUN indicator (Red) is OFF.
However, the operation continues with "DEFROST"
indication, and the unit is stopped after the defrost
operation is finished.
Filter
Filter Clogging
●" FILTER " indication is ON when the filter is
clogged with dust, etc. Clean up the filter.
Press the RESET switch after cleaning up filter. The
" FILTER " indication is OFF.
＊Indications When In Abnormal Condition
Abnormality
●The RUN indicator (Red) is ON.
●" ALARM " is indicated on the liquid crystal display.
●The indoor unit number, the alarm code, the model
code and the connected number of indoor units 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
distributor or dealer 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 occured by
the activation of the micro computer for the unit
protection from the electric noise.

Operation Instructions
- 9 -
Operation Instructions
◆Troubleshooting
Unit does not start:
1. Is the main power source switch to the unit ON?
2. Is the main fuse normal?
Poor cooling operation:
1. Are there any obstacles which hamper sufficient air to the indoor unit and outdoor unit coil?
2. Check the temperature setting to make sure that it is set at the desired temperature.
3. Check the air filter if it is dirty or clogged.
Please contact your service center if the problem is still not solved.
Do not try to repair the unit by yourself.
◆Maintenance
1. Clean or replace the air filter.
2. Clean the cabinet with clean dry cloth.
3. Clean the condensate drain pan and the drain piping.
4. Clean the condenser and evaporator coil. Call your serviceman to do this type of work.
5. Check for abnormal sound and vibration. If you find abnormal sound and vibration, stop the unit and contact
your service center for proper maintenance.
Switch the unit OFF before cleaning the air filter.
Removing
off air filter.
Turn the air
inlet open.
1
2
▲WARNING
！
▲WARNING
！

Preparation
- 10 -
Preparation
1. Preparation
1.1 Installation Location
(1) Required Material – Measure, Architectural Information Regarding Installation Location.
(2) Confirm that the final installation location is provided with convenient piping and wiring work.
(3) Check the total piping length and difference in height between indoor and outdoor unit, it should not exceed the
following:
Maximum Piping Length Difference in Height Bending Quantity
under 75m under 30m under 12
(4) Do not install the air conditioner in place where there are flammable gases and acid solvents.
(5) Do not install the air conditioner near high-frequency machines.
(6) No radiation sources shall be allowed near the installation site.
(7) The installation shall be duly secured for vibration and noise. Hot air released from the outdoor unit shall be led
off the neighboring windows. Water drops, drainage, vibration and noise shall be kept off the neighborhood.
1.2 Installation Space
(1) Check for obstacles that restricts unit air flow or hamper maintenance and service work, keep a proper space
for operation.
◆Operation Space for Indoor Unit

Preparation
- 11 -
Preparation
◆Operation Space for Outdoor Unit
Individual Outdoor Unit
Combined Installation
(1) Horizontal
(2) 2-Unit Leveled Installation (3) Sequential Installation
(1) In case of existence of
obstruction on top and
in the back (open
space at front and by
the side).
(2) In case of existence of
obstruction in the back
and by the side (open
space at front and on
top).
(3) In case of existence of
obstruction on the front
(open space in the back,
by the sides and on the
top)
(4) In case of existence
of obstruction in the
back and on the front
(open space by the
sides and on the top)
(5) In case of existence of
obstruction in the
surrounding (open
s
p
ace on to
p)

Preparation
- 12 -
Preparation
1.3 Foundation
(1) Check to ensure that the foundation is flat leveled and sufficiently strong.
(2) Confirm elevation provision for the outdoor unit on a solid base with an iron frame or concrete curbs.
(3) In order to obtain proper clearance beneath the either rooftop or on-the-ground installation, provide a gravel
or concrete space around the outdoor unit air intake. In order to avoid air flow obstruction due to grass or
other vegetation.
1.4 Unit Check
Check to ensure that the unit has been transported without damage. File a damage claim with the transportation
companies if mishandling due to transportation company negligence is suspected.
Unit Leveled Installation

Installation
- 13 -
Installation
2. Installation
2.1 Anti-tumbler for Indoor Unit
(1) Be sure to secure the air conditioner with the anti-tumbler angle iron.
(2) To keep the air conditioner from tumbling, fix it on the floor and the wall.
Securing of the wall fixation angle iron
‧ Refer to the table below for measurement of distance between air conditioner and wall.
‧ For vertical measurement to the floor refer to the angle iron installation site.

Installation
- 14 -
Installation
2.2 Anti-tumbler for Outdoor Unit
(1) Use fix bolts as shown in the figure right to secure the unit on the base.
(2) Apply enhanced installation to keep off seismic movements and typhoons.
(3) Use cement base. Refer to figure below.
Remark: The securing bolts are measured from 15mm in the base.
In case of installation in an open space, such as
on top of a tall building where the outdoor unit
outlet oppose strong winds, with impacts on its
rotation and cooling capacity as well, the
following are suggestions for improvement.
Keep outdoor unit face (as shown) the wall and
the inlet toward outside with a gap of 60cm
between the wall and the front of the outdoor unit.
Keep outdoor unit outlet and the wind direction
of the installation site in a perpendicular
position.
Watch for strong wind
(
Exam
p
le 1
)
(Example 2)

Refrigerant and Drainage Piping
- 15 -
Refrigerant and Drainage Piping
3. Refrigerant and Drainage Piping
Tools and Instruments
One set of piping tools( (+)(-) screw drivers, Tape measure, Knife, Hacksaw, Hexagon spanner, Spanner
(14,17,19,22,24 & 30mm opening), Hose cutter, Flared tube expander ), Gas Leak Detector, R410A Refrigerant.
Piping Material
(1) The used copper tubes of refrigerant (R410A) unit must be updated, washing and using repeatedly is extremely
prohibited.
(2) The pipe end flare mouth of flare nut connection department, please according to refrigerant (R410A)piping
require size to process as below.
(3) The unit uses environmentally refrigerant (R410A), when it is in the construction, please make sure the cycle
system to keep dry, clean, air-tight three principles. Before piping connections, please use nitrogen or dry air
clear the dust or impurities within the pipe.
3.1 Preparations
(1) Confirm that the piping are de-oxidized seamless copper tubes, and that they are free from dirt and moisture.
(2) Piping connections to the outdoor unit can be performed at the stop valves for liquid outlet and gas inlet in the
machine compartment. Flare nuts are attached at liquid and gas connections of the indoor and the outdoor unit.
(3) All refrigerant and drainage piping shall be duly insulated to keep off frost.
Specification of refrigerant and drainage piping
Model Refrigerant Piping Length ( 1-75m) Drainage Piping
Indoor Unit Outdoor Unit Liquid Line Gas Line Outer Diameter
Additional Refrigerant (60g)
of each increasing 1m
Size : Ø 9.53mm Size : Ø 15.88mm
Type : 3/8 Flare Nut Type : 5/8 Flare Nut
RPS-140AN RAM-140FPS/
RAM-140FPSB Quantity : 1 Quantity : 1
Ø 20mm From (31~75m)
(4) Confirm that the indoor unit piping direction and accessories is suitable.
◆Indoor unit piping direction
NOTE:
For unit operational durability, it is recommended to use a field-supplied filter dryer in the refrigeration cycle.

Refrigerant and Drainage Piping
- 16 -
Refrigerant and Drainage Piping
3.2 Refrigerant Piping
(1) Check to ensure that the stop valves of outdoor unit have been closed.
(2) Attach the connection pipes to the stop valves.
(3) Remove the air inlet grill, filter, filter guide and lower front cover.
(4) Connect the indoor and the outdoor unit with the specified refrigerant pipes.
(5) Charge nitrogen or refrigerant from the check joint of the liquid stop valve, using a Gas Leak Detector perform
leakage test
(6) After completing the piping, the entire exposed tube adapter shall be duly covered with insulator and tightened
with a band.
Tightening Flare Nut – When tightening the flare nut, utilize two spanners as shown below.
The required tightening torque is as follows:
Do not charge OXYGEN,
ACETYLENE or other flammable and
poisonous gases into the refrigeration
cycle when performing a leakage test
or an air tight test. These types of
gases are extremely dangerous,
because explosion can occur. It is
recommended that compressed air,
nitrogen or refrigerant be charged for
these types of tests.
▲DANGER
！
Pipe Size Tightening Torque
mm (in.) (kgf-cm)
6.35(1/4) 140-190
9.53(3/8) 350-450
12.7(1/2) 450-550
15.88(5/8) 500-600
Tightening Work of Flare

Refrigerant and Drainage Piping
- 17 -
Refrigerant and Drainage Piping
Field Piping Arrangement (Maximum piping length = 75m)
3.3 Drainage piping
(1) The indoor drainage and the outdoor drainage shall be joined with adherent agents.
(2) For assurance of normal drainage tubing operation, a water filler shall be given for a gradual adding of 1000cc
of water from the right side of the air outlet to the evaporator while checking for leakage in the drainage.
A. Outdoor Unit Below B. Outdoor Unit Above