HITACHI RAM-112FPSQB Split Unit Inverter Air Conditioner Outdoor Unit Instruction Manual
- June 13, 2024
- Hitachi
Table of Contents
RAM-112FPSQB Split Unit Inverter Air Conditioner Outdoor Unit
Product Information: Hitachi Split Unit Inverter Air
Conditioner Outdoor Unit
This product is a general air-conditioner designed for cooling
indoor spaces. It should not be used for special purposes such as
food, animal and plant storage, precision machinery, or artwork
storage. The unit contains an adequate quantity of refrigerant for
pipes up to 30m long. If longer pipes are needed, additional
refrigerant should be added on-site as necessary. The specific
quantity of refrigerant required may vary depending on the pipe
length and model, so please refer to the piping instructions for
more details.
Applicable models: RAM-112FPSQB, RAM-125FPSQB, RAM-140FPSQB,
RAM-160FPSQB
Temperature Ranges of Use Condition:
Function | Indoor Unit Air Temperature | Outdoor Unit Air Temperature |
---|---|---|
Air-conditioning | DB: Dry-bulb temperature/WB: Wet-bulb temperature |
Product Usage Instructions
Safety Precautions
-
Before installation, carefully read the Safety Precautions for
correct installation. -
Pay special attention to warning signs. Failure to follow these
warning signs during installation (incorrect installation) may
cause severe injury. They are thus extremely important and must be
strictly followed. -
When testing the unit after installation to verify if there is
any abnormality, please follow the instructions in the manual and
explain to customers the uses and maintenance of the unit. -
Hand over both the installation and user manuals to the
customer.
Warning Signs and Meanings:
-
Warning: Incorrect operation may cause severe
injury. -
: Items that must be followed. Make sure that
both units for models must be earthed. -
: Prohibition.
-
Attention: Items that must be followed by
general users.
Precautions for Installation
Install the unit according to the instructions in the
installation manual. Incomplete or incorrect installation or
failure to follow these instructions may cause water leakage,
electric shock, or fire. Use special tools and piping materials
designed for R410A refrigerant and follow the provided instructions
for proper installation.
Hitachi
Before installation, please read this manual carefully and keep it properly.
Split Unit Inverter Air Conditioner Outdoor Unit
Installation Manual
Before installation, please read this manual carefully
and keep it properly.
This unit contains refrigerant inside. The quantity of refrigerant is adequate for pipes up to 30m long. If longer pipes are needed, add refrigerant onsite as necessary. As the quantity of refrigerant varies due to pipe length and model differences, please refer to the piping instructions for details.
Applicable models
RAM-112FPSQB RAM-125FPSQB RAM-140FPSQB RAM-160FPSQB
Make sure to hand over this manual to workers of the next stage and finally to
the customer. (Transportation and Handling) Æ (Ref. Piping Work) Æ (Electrical
Wiring) Æ (Test Run) Æ (Customer)
Introduction This product is a general air-conditioner. Do not use for special
purposes, such as food, animal and plant, precision
machinery, and artwork storage. Do not install at the following locations:
Locations where there is flammable gas and airborne grease. There is a risk of
fire and machine deformation, erosion, and damage.
Locations containing airborne grease (including grease from engine oil) and
flammable gases. Locations containing sulfur gas, such as hot springs. Do not
install at the following locations to prevent erosion: Coastal areas and
locations with higher salinity. Locations with high acidity or alkalinity.
When installing at locations where medical instruments may generate
electromagnetic wave, avoid causing malfunction of the air-conditioner. To
prevent electromagnetic interference (EMI), do not point the electromagnetic
wave emitting surface of medical
instruments toward the electrical control panel, remote controller, and remote
controller cable of the air-conditioner. To avoid EMI in the air, keep
machinery generating electromagnetic wave, such as radios, at least 3 meters
away from
the air-conditioner. Do not place plants or animals directly under the
airflow, as it is bad for them. As light will affect signal receiving of the
remote control, keep the signal receiver at least one meter away from lights
to
ensure signal receiving of the wireless remote control.
Temperature Ranges of Use Condition
Function
Indoor Unit Air Temperature
Outdoor Unit Air Temperature
Air-conditioning
-5ºC DB to 43ºC DB
21ºC DB /15ºC WB to 32ºC DB /23ºC WB
DB: Dry-bulb temperature/WB: Wet-bulb temperature
Contents 1. Safety Precautions
………………………………………………………………………………………………………………………………………………. 2 2.
Handling………………………………………………………………………………………………………………………………………………………….3-4
2-1 Accessories of the outdoor unit
……………………………………………………………………………………………………………………. 5 2-2 Verification of the
combined capacity of indoor and outdoor units …………………………………………………………………… 5 2-3
Outdoor unit installation ……………………………………………………………………………………………………………………………5-7
3. Piping ……………………………………………………………………………………………………………………………………………………………….. 8 3-1
Refrigerant pipe installation
…………………………………………………………………………………………………………………….8-11 3-2 Evacuation and
refrigerant filling ……………………………………………………………………………………………………………….. 11 3-3 Pipe
length DIP switch settings ………………………………………………………………………………………………………………….. 12
3-4 Refrigerant filling level………………………………………………………………………………………………………………………………
12 3-5 Refrigerant recovering method
…………………………………………………………………………………………………………………… 12 4. Wiring
…………………………………………………………………………………………………………………………………………………………13-15 5. Test Run
and Handover……………………………………………………………………………………………………………………………………… 16 5-1 Test
Run………………………………………………………………………………………………………………………………………………16-17 5-2 Menu setup
……………………………………………………………………………………………………………………………………………… 18 6. Error
Code……………………………………………………………………………………………………………………………………………………….. 19
66MP1388 1
1. Safety Precautions
Before installation, carefully read the “Safety Precautions” for correct installation.
Pay special attention to ” Warning” signs. Failure to follow these warning signs during installation (incorrect installation)
may cause severe injury. They are thus extremely important and must be strictly followed.
When Test run the unit after installation to verify if there is any abnormality, please follow the instructions in the manual
and explain to customers the uses and maintenance of the unit. Lastly, hand over both the installation and user manuals to
the customer.
[Signs and Meanings]
Warning: Incorrect operation may cause severe injury.
: Items that must be followed. Make sure that both units for
models must be earthed.
: Prohibition.
: Attention: Items that must be followed by general users.
Precautions for Installation
Install the unit according to the instructions in the installation manual. Incomplete or incorrect installation or
failure to follow these instructions may cause water leakage, electric shock, or fire.
Install with the special tools and piping materials for R410A refrigerant and according to the instructions in the
installation manual. As the pressure of R410A, an HFC refrigerant, is 1.4 times higher than the previous R22
refrigerant, use of incorrect piping materials or incorrect installation may cause an explosion, which leads to
water leakage, electric shock or fire.
Do not install in a location where flammable gas may be produced or flow in. This may cause fire.
Make sure to install the units in locations that can provide full support of the unit’s weight. Otherwise, the unit
may fall and cause injury.
Do not climb on the air-conditioner or put objects on it to prevent collapse or overturning, which may cause
injury.
Make sure that no refrigerant leaks. Although Hitachi uses non-flammable, non- toxic, and odorless safety
refrigerant (HFC), when HFC leaks and comes in contact with sparks, toxic gas produces. Also, as HFC has a
Warning
higher mass than air, it will cause oxygen insufficiency near the floor.
This model uses the non-flammable refrigerant R410A and non-flammable refrigeration oil Ze-GLES RB74 (JX
Nippon Oil & Energy Corporation). Filling other types of refrigerants, gases, oxygen, propane, alcohol, or
refrigeration oil with the special filling machine for R410A and Ze-GLES RB74 may cause machine failure and
even explosion or fire. Make sure to use qualified refrigerant and refrigeration oil only.
The machine maintains a high pressure at all times. Do not heat the machine or any parts in any situation. This
may cause machine failure and even explosion or fire.
Make sure to remove all flammable objects on-site before a welding operation. Otherwise, this may cause fire.
Also, always wear leather gloves before handling refrigerant to prevent frostbite of the hand or the body.
Clean up refrigerant with non-flammable, non-toxic cleaning agents only. Use of flammable cleaning agents
may cause explosion or fire.
Ensure adequate ventilation when working in confined spaces to prevent oxygen insufficiency. When cleaning
agents are exposed to sparks at a high temperature, toxic gases may be produced.
Make sure to recover the cleaning agent after use. Do not freely dilute CFCs in the atmosphere.
Warning
Precautions for Electrical Works
Always ask a qualified electrician to carry out electrical work with reference
to the national regulations and the instructions in this manual. Make sure to
use an individual circuit for the air-conditioner. Failure to follow
instructions in this manual, insufficient circuit capacity or improper
construction may cause electric shock or fire.
Connect units with wires of the correct types and gauges. Use of incorrect
wires may cause electric shock or fire. Wires should be securely locked on
terminals. Loosened connection of wires will cause overheating of terminals
and fire. When securing wires on a terminal, make sure wires are unaffected by
external influence. Improper connection
may cause overheating of wires and fire. Make sure to earth the indoor and
outdoor units according to relevant electrical requirements. Unearthed indoor
and outdoor units may cause electric shock. Do not earth indoor and outdoor
units a gas pipe, water pipe, arrester, or phone line. Incomplete earth may
cause electric shock. It is necessary to install an earth leakage circuit
breaker (ELCB). The absence of an ELCB may cause electric shock or fire. Make
sure to disconnect power supply before wiring and electrical inspections to
prevent electric shock. Keep wires away from places where rats or other
animals may bite the wires to prevent fire. When installing the panel cover,
avoid jamming wires together to prevent electric shock and fire.
2
An item preceded by a box is a check item. After examining the item, check it
5.
2. Handling
When handling an outdoor unit, carry it to the installation location in its
original packing, if possible.
(1) Before Installation
This unit uses HFC refrigerant (R410A) that does not damage the ozone layer.
1)As the pressure of new refrigerant R410A is 1.4 times higher than ordinary refrigerants, it is more easily affected by water,
oxides, grease, and other impurities. As new refrigeration oil Ze-GLES RB74 is also used, make sure that no water,
impurity, non-R410A refrigerant, and non-Ze-GLES RB74 refrigeration oil enter the system. 2) To prevent mixing R410A refrigerant and Ze-GLES RB74 refrigeration oil with other refrigerants and refrigeration oil,
both the connector and cap nut for filling of the R410A refrigerant and Ze- GLES RB74 refrigeration oil are different from
that of other refrigerants and refrigeration oil. Make sure to use specific tools for filling the R410A refrigerant and
Ze-GLES RB74 refrigeration oil. {: For both new and old types of refrigerants : Exclusive for R410A (R22 not supported) z: Exclusive for R407C(R22
not supported)
Interchangeability Causes and Precautions for Non-interchangeability
Gauges and Tools
Copper pipe cutter Pipe expander
with R22
(new refrigerants only)
R407C R410A
(: must follow items)
{
{
{
{
y Expand the flare of pipes to support the pressure resistance of R410A. Expand the pipe with a 1mm
Application
Pipe cutting and deburring For expanding the flare of refrigerant pipes.
Expander Spacer
(N/A)
Pipe bender
{
{
pipe expander pad when using existing pipes. (The pipe flare expander for
R410A can also be used For processing the flare mouth. for R407C refrigerant
piping).
For bending the refrigerant pipe.
Refrigerant Piping
Pipe expanding
{
machine
Torque wrench
{
Welder
{
Nitrogen
{
Pipe flare coating z
{
For expanding the refrigerant
pipe.
y 2mm larger than the 12.7 or 15.88 wrenches for
use on R410A pipes. Not suitable for use on the pipes of currently used refrigerants.
For locking cap nuts.
{ y 6.35 and 9.53 wrenches can also be used.
{
y
Weld pipes as instructed (flame adjustment, welding temperature, and choice of welding materials).
For welding refrigerant pipes.
{
y Strictly prevent dust from entry. (Following the nitrogen use instructions)
For preventing oxidation and the air-tightness test
y JX Nippon Oil & Energy Corporation synthetic oil:
Ze-GLES RB74
y Do not use mineral oil for R22, use only synthetic oil For coating and repairing pipe
of the equivalent level.
flares.
y Synthetic oil has high moisture absorbency. Do not
store synthetic oil in a humid place. y Refrigerant cylinders are identified by color
(cylinders for different types of refrigerants are in
Refrigerant cylinder
z (brown)
(pink)
different colors) (R410A: Pink) (R407C: Brown) (Do not use gas refrigerants) non-azeotrope
For filling refrigerants
Vacuum Dry and Refrigerant Filing
refrigerants. Use liquid refrigerants only.
Vacuum pump
{
{ Current vacuum pumps can be used. To prevent
Ball valve (prevent reflux)
z
Manifold gauge set
z
pump stop, oil inside will flow back to the
For vacuum drying.
refrigerant pipe. Install a “ball valve” on the pump
y Compared to R22 refrigerant, new refrigerants have
higher pressure and thus are not interchangeable.
R410A fitting spec: 1/2 UNF
R407C fitting spec: 7/16 UNF “Do not use fittings for R22 refrigerant”. The
For confirming vacuum status and refrigerant filling pressure.
Filling hose
z
mineral oil on the fittings may contaminate new refrigerants and clog the circulation system to cause
compressor failure.
Filling bottle
Prohibited
For filling refrigerants
Refrigerant filling scale
{
{
For measuring refrigerant filling level.
Refrigerant leak z detector
y The leakage testing methods of new and old (R22) refrigerants are different.
For testing refrigerant leakage.
: Interchangeable for R410A and R407C refrigerants.
3
- Use special parts for R410A in piping and connection. Both the cap nut and
pipe flare are different, choose the correct type according to the
specifications below.
Unit: mm
Flare Size
Pipe Diameter
d
6.35
R407C/R22
9.0
+0
Size -0.4
R410A
9.1
9.53
13.0
13.2
12.7
16.2
16.6
15.88
19.4
19.7
Cannot be
19.05
23.3
processed (1/2H
material)
Connect with the flare that comes with the product.
Selection of pipe wall thickness The wall thickness of pipes must be changed according to the design pressure change. Wall thickness of copper piping for the new refrigerant (mm)
Pipe Diameter
6.35 9.53 12.7 15.88 19.05 22.2 25.4 28.6 31.75 38.1
Current Refrigerant
R22
Wall
Piping
Thickness Material
0.6
O
0.8
O
0.8
O
1.0
O
1.0
O
1.2
O
1.2
O
1.4
O
1.4
O
1.65
O
New Refrigerant
R407C
R410A
Wall
Piping
Wall
Piping
Thickness Material Thickness Material
0.8
O
0.8
O
0.8
O
0.8
O
0.8
O
0.8
O
1.0
O
1.0
O
1.0
O
1.0
1/2H
1.15
O
1.0
1/2H
1.0
1/2H
1.0
1/2H
1.0
1/2H
1.0
1/2H
1.1
1/2H
1.1
1/2H
1.15
1/2H
1.35
1/2H
Connector Selection The wall thickness of connectors (elbows and tubing) must
be changed according to the design pressure change. As 1/2H parts cannot be
bend or expanded, select the appropriate tubing according to the minimum wall
thickness below. Please note that the sizes of some cap nuts also change.
Minimum wall thickness of connector (mm)
Pipe Diameter 6.35 9.53 12.7 15.88 19.05
R407C/R22 0.5 0.6 0.7 0.8 0.8
R410A 0.5 0.6 0.7 0.8 0.8
Pipe Diameter 22.2 25.4 28.6 31.75 38.1
R407C/R22 0.9 0.95 1.0 1.05 1.25
R410A 0.9 0.95 1.0 1.1 1.35
Cap Nut
Copper pipe
Cap Nut Size B (mm)
Pipe Diameter
6.35 9.53 12.7
Cap Nut Size B (mm)
R407C/R22
R410A
17
17
22
22
24
26
Pipe Diameter
15.88 19.05
Cap Nut Size B (mm)
R407C/R22
R410A
27
29
36
36
4
2-1 Outdoor unit accessories
Verify the following outdoor unit accessories before installation.
Name
Q’ty
Application
Special Washers
4 Securing the mounting board
Method See installation instructions in p.7
Drain pipe
1
For draining condensate at the For use on 20 drain
bottom
(See installation instructions in p.7)
2-2 Verification of the combined capacity of indoor and outdoor units
- Select the quantity and capacity of indoor units for outdoor units as shown below.
Outdoor Unit
Indoor Unit
Combined Capacity
Maximum Number of Indoor Units
RAM-112FPSQB
RAM-125FPSQB
100-110%
2
RAM-140FPSQB
RAM-160FPSQB
- Attention
This unit will not operate in the first four hours after power connection. The error code will be “d1-22”. Follow the steps below to deactivate protection if you need to operate the unit within four hours after power connection. 1) Connect the power of both the indoor and outdoor units. 2) Wait for 30 seconds. 3) At the same time, press the PSW1 and PSW3 switches on the mainboard of outdoor unit
for three seconds.
2-3 Outdoor unit installation
Cautions - Do not install at locations containing flammable gases, salt (seaside) and sulfur (hot springs) or environments containing acid and alkaline. (Fault may occur more easily when installing in such locations/environments. Apply special protection if it is necessary to install the air-conditioner in these locations/environments.)
- Do not install at locations with instruments producing electromagnetic wave. Do not point the electromagnet wave emitting surface toward the electrical control panel of the air-conditioner.
- To avoid EMI in the air, keep machinery generating electromagnetic wave, such as radios, at least 3 meters away from the air-conditioner.
- Do not install the outdoor unit in the indoor.
(1) Installation space Retain maintenance space for the outdoor unit as shown below
Standalone
Standalone
Standalone
No obstruction above.
No obstruction on sides and Obstruction in front of the
above
air outlet
(unit: mm) Two or More Units
(side by side) Even both sides are clear of obstruction, maintain at least
100mm between units.
50+
300+
50+ 200+
600+
250+
300+
5
(Unit: mm)
Two or More Units
Two or More Units
Two or More Units
Two or More Units
(over and under)
(over and under) (side by side and over and under) (side by side and over and under)
No obstruction on sides Obstruction in front of the No obstruction on sides and Obstruction in front of the air
and above
air outlet
above
outlet
400+
400+
400+
400+
250+
1000+
250+
250+
1000+
(2) Installation locations 1) Dry and well-ventilated locations. 2) Do not
expose the unit under direct sunlight and to heat sources. Use a shade when
direct sunlight is unavoidable. 3) Make sure the noise from unit operation
does not disturb neighbors (noise at the back (air inlet) is about 3dB
higher). 4) Do not directly ventilate air from the unit to ornamental plants
or the window of neighbors. 5) Do not install the heat exchanger in places
where dust or scrap paper can enter easily. Add a wind guard (see below)
as necessary to deflect wind. 6) Avoid installing the unit in places with
headwind. Add a wind guard when installing in places with strong wind. 7) Pay
attention to the following items during installation:
1. To prevent the outdoor unit from falling, shaking, and producing noise in
a strong wind or an earthquake, install
the unit using appropriate methods. Determine the required installation
strength by calculating the seismic strength.
Do not install the unit at locations where strong wind may blow off the roof
or wall. Secure the unit with steel wire
if necessary.
2. Add rubber cushions to the four legs of the unit stand.
3. The location should be convenient for draining rainwater and condensate
from defrosting. For good drainage, the
outdoor unit should be installed in places with draining facilities. (When
installing under roofs where condensate
drips, this may wet the floor to cause fall in winter.) Also, using central
draining pipes is easier. (In frigid zones,
condensate from defrosting may freeze easily in winter, do not use central
draining pipes.)
4. Legs of the unit must be installed on a robust stand of about 100-300mm
tall.
Installation in Places with Strong Winds
Follow the instructions below when installing the unit on the roof with strong winds in the absence of obstruction.
· Do not face the air outlet toward headwinds. This will interfere with air ventilation from the unit and damage the unit.
· When installing the unit with the air outlet facing headwinds. 1. When add a
wind guard
Optional wind guard
2. When there is a wall
Wall Air inlet
Wind direction
Face the air outlet toward the wall or wind shelter.
Air out
Attention When strong winds continuously blow toward the air outlet, the
ventilation fan will rotate in reverse and become damaged.
Strong wind
Optional wind guard
Model
Q’ty
WSP-160A
2
Strong wind Keep at least 600mm from the wall.
6
(3) Installation
Securely fix the outdoor unit on the foundation to prevent collapse in a strong wind or an earthquake or noise due to loss of
level (leaning aside).
-
Secure the unit on the foundation with anchor bolts.
-
Anchor bolt size.
Outdoor unit stand Nut
- Verify drainage and drain pipe installation. Water will drain from the unit
when it rains. Install the
unit at locations with good drainage and drain water to
Special washer
the ditch. Also, avoid install the unit overhead as water will drip from the unit. Plan drainage for the secondary
condensate tray if overhead installation is necessary.
Concrete
Anchor bolt (M10)
Drain hole
Mortar
21mmUnder 21mm (After cutting off A)
E B
- Example of fixing the stand with anchor bolts: Make sure to cut off section A when using this type of anchor bolts. Otherwise, it will be difficult to remove the pipe cover.
D
A
C
Unit: mm
Model
A
B
C
D
E
RAM-112FPSQB
RAM-125FPSQB RAM-140FPSQB
700
420
255
106
307
RAM-160FPSQB
Concrete Anchor bolt
5) Securely fix the outdoor unit on the foundation to prevent collapse in a
strong wind or an earthquake or noise due to loss of level (leaning aside).
6) When using ordinary frames whose legs are narrower than the legs of the
outdoor unit, add a board under the legs of the outdoor unit as shown in the
figure before installation to ensure all legs of the outdoor unit are
adequately supported on the frame.
Maintain this distance at much as possible to install there is adequate space
for piping.
Outdoor Unit Leg Width: 70mm
The frame’s legs are narrower than the outdoor unit’s legs.
Ordinary Frame
Recommended board size: SPHC material (prepared onsite) Unit: mm Board
thickness: 4.5mm
2-holes
The frame’s legs are narrower than the outdoor unit’s legs.
Board
Ordinary Frame
Frame Leg Width: 60mm (Example of ordinary frames)
Outdoor Unit Leg Width: 70mm
Board Width: 100mm
7
3. Piping
3-1 Refrigerant pipe installation
(1) The requirements for pipe diameter, pipe length, and lapse height between
the indoor and outdoor units are shown in the table below.
System example:
The diagram shows one outdoor unit with four indoor units. In this example,
only one refrigerant pipe is used. In actual installation, however, separate
pipes should be used for refrigerant and refrigeration oil.
Outdoor unit model
RAM-112FPSQB
RAM-125/140/160FPSQB
Total pipe length: L0 + L1+ L2
70
75
Max. pipe length (actual): Lt
Pipe length from the outdoor unit to each indoor unit.
90(70)
95(75)
Max. lapse height between the outdoor unit and indoor units: H1
When the outdoor unit is higher than the indoor units. When the outdoor unit is lower than the indoor units.
30 20
30 20
Max. lapse height between indoor units: H2
3
3
Max. pipe length between branch pipes and indoor units: L1, L2
10
10
Branch pipe selection
MW-NP282A at a
1. The length and route of both the refrigerant and
Cautions
refrigeration oil pipes must be the same.
2. Branch pipes should be near the indoor unit.
(2) Refrigerant pipe size
Indoor unit
Outdoor unit
Capacity Level 112, 125, 140,160
Refrigerant Pipe Size
(mm)
Gas Side Liquid Side
15.88
6.35 9.53
Refrigerant Pipe Size (mm)
Gas Side Liquid Side 15.88 9.53
8
(2) Precautions for installing refrigerant pipes (example) Make sure the pipe is free of water and dust inside. Cut the pipe with a copper pipe cutter. Remove dust and impurities inside the pipe with nitrogen or compression air before installation. (Do not use a saw or whetstone that may cause powder.) 1) Prepare suitable refrigerant pipes onsite.
Protect pipe ends when penetrating walls. Penetrating walls
Protect pipe ends with a cover or plastic bag.
Do not put pipes on the floor unprotected.
Protect pipe ends with a cover or plastic bag.
Rubber band
Rainwater enters.
Protect pipe ends with a cover or plastic bag.
- Connect the indoor unit only with the optional branch pipe kit. Do not use connectors.
Maintain level with the column, wall, and ceiling when fixing branch pipes.
Maintain level
To indoor unit
To outdoor unit
Horizontal
Horizontal
Vertical Branch pipe
Note: Fix pipes with clamps outside the insulation layer or add cushions between clamps and pipes.
To outdoor unit
Fix on columns or walls
Fix on the ceiling and beams
Fixing branch pipes
Top
Top
Top
Branch pipe
At least 0.5m
At least 0.5m
At least 0.5m
Branch pipe Bend
Main pipe Branch pipe
radius Main pipe
Bottom
Branch pipe
Bottom
Bpraipnech
Mainpipe Branch pipe
Top Branch pipe
Mainpipe Branch pipe
Branch Bottom pipe
Branch pipe Bottom
Precautions for releasing pressure from the pipe union
Release pressure from the pipe union ( in the right diagram) on the fluid
interceptor valve on the pipe union ( in the right diagram) of the gas
interceptor valve. Follow the instructions below.
Operation Air Conditioner
Pipe union on the gas interceptor valve.
Low pressure
Pipe union on the liquid interceptor valve.
Filling refrigerant after evacuation or repair.
Note: After removing the filling hose, prevent refrigerant and refrigeration oil
from contaminating the electrical panel.
9
(3) Pipe removal direction
Panel removal direction
Pipe cover
Front piping
Break the cover with a screw driver and remove it.
Rear piping
Break the cover with a screwdriver and remove it.
Right piping
Break the cover with a screwdriver and remove it.
Bottom piping (cover)
y As shown in the left diagram, pipes can be installed in four locations. Remove the cover where the pipe is installed and install the pipe through the hole. Break the cover with a screwdriver and remove it. Break the bottom cover with a small hammer.
Upper right rear cover.
Lower right rear cover.
Pipe cover
Size cover flash after removing it. Wrap wires and pipes with the insulation sheet (prepare on-site).
Front and right piping
Bottom piping
Removal of pipes installed in front.
Removal of pipes installed on the right
Fluid pipe
Stand
Wire Gas pipe Cover
Rear piping
Remove the rear piping cap next
to the bottom cover and remove
the cover as shown in the shaded
part
in the diagram below.
Upper Right Rear cover
Lower Right Rear cover
- When using rubber stoppers and electrical hoses, check the size of the above mentioned seams before removing the
cover in the shaded part
.
- Before removing pipes installed in the front and on the right, leave adequate space for removing wires. For example,
when removing pipes installed in the rear and on the right, remove pipes from the upper part of the seams (A). Make
sure pipes and wires inside the unit do not interfere with each other.
-
Bend the pipe for the turns with a pipe bender.
-
To prevent burrs from damaging pipes and wires, wrap pipes and wires with insulation sheets (prepare on-site).
-
To prevent rainwater from entering the unit, put back the pipe cover afterwards. Wrap pipes with insulation sheets
(prepare on-site) before penetrating pipes through the cap hole to ensure it is seamless. Make sure that there is
adequate space for putting back the pipe cover.
Guidelines for Opening Panel Cover
Press the panel cover with
one hand and remove the
screw on the left.
Push the cover downward
Panel Cover and move to the right to
(4 hooks)
remove it.
10
(4) Pipe connection and insulation
- Make sure the interceptor valve of the outdoor unit is completely shut. 2)
Connect the pipes between the indoor unit and the outdoor unit. When locking
pipefittings,
coat refrigeration oil on the interior and exterior edges of the flare and lock the fitting with two wrenches at the specified torque. Check leakage after locking. Fill pipes up with nitrogen before welding. 3) Fix the pipes between the indoor unit and outdoor unit appropriate. Avoid fixing pipes on weak wall surface and ceilings. This may cause vibration and noise, particularly for short pipe length. 4) Re-confirm there is no leakage after piping. - Wrap pipefittings with insulation sheets and pack with plastic tape for
insulation. Also, wrap
the gas inlet and liquid inlet of the refrigerant pipe with insulation sheets to ensure insulation.
Remark: Prepare refrigeration oil on-site.
Supplier: JX Nippon Oil & Energy Corporation
Type: Synthetic Ze-GLES RB74
Interceptor valve on the outdoor unit
Interceptor valve on the indoor unit
Do not work with two wrenches here to prevent refrigerant leakage.
Interceptor valve
Cap nut
Work with two wrenches.
Interceptor valve control of the liquid inlet.
Locking torque table:
Pipe size
Torque
Interceptor valve control of the gas inlet.
Model
Hex key (mm) Spool locking torque (N·m)
RAM-112/125/140/160FPSQB
Gas Inlet
Liquid Inlet
5
4
11~14
7~9
6.35 (1/4 “) 9.53 (3/8 “) 12.7 (1/2 “) 15.8 8 (5/8 “)
20 N·m 40 N.m 60 N.m 80 N.m
(5) Air-tightness test
-
Shut the interceptor valve spool of the gas and liquid inlets before running the air-tightness test.
-
Fill in air or non-flammable gas (except for oxygen and toxic gases) from the pipe union of the fluid inlet and the pipe union of
the gas inlet to run the air-tightness test. The pressure is 4.15MPaG. Release gas after the test.
3-2 Evacuation and Refrigerant Filling
(1) Evacuation 1) Please refer to the instructions on the attention plate
inside the panel cover for details of interceptor valve operation. 2) Evacuate
from both the gas and liquid interceptor valves until pressure is below
-0.1MPaG (-750mmHg). 3) After evacuation, shut the valve on the manifold gauge
set, stop evacuation, and settle for one hour to see if meeting reading rises.
4) As the pipe union does not fit in the cap nut, use a filling hose. Also,
lock the cap nut at 15-16N·m afterwards. 5) Make sure to check leakage with a
leakage detector and bubbles. Do not use bubble liquids containing NH3.
Recommended bubble liquids for the leakage test tabulated below. Do not use
general household detergents in the bubble test.
(2) Refrigeration filling 1) The unit has been equipped with refrigerant
before shipping. If pipes are longer than the design range, add suitable
amount of refrigerant on-site (p. 12). 2) Fully open the gas interceptor
valve. 3) The compressor operates when the air-conditioner is in operation.
Add refrigerant from the pipe union of the fluid interceptor valve. At the
same time, the fluid interceptor valve opens slightly. 4) Fully open the fluid
interceptor valve after filling refrigerant. 5) Make sure to check leakage
afterwards. Note
1. When removing the cap of the interceptor valve spool, gas will pop from
the O-ring inside and thread, which is irrelevant to a gas leak.
2. As the outdoor unit uses R401A refrigerant, use the manifold gauge set and
filling hose for R401A refrigerant.
3. When pressure does not drop below -0.1MPaG (-750mmHg) after evacuating for
one hours, there may be leakage or water inside the pipe. First, check if
there is leakage. Next, evacuate for one hour again. Lastly, check pressure
again.
Do not purge air inside the unit with refrigerant. This will result in refrigerant insufficiency and cause machine damage.
Insulation Sheet Wrapping Wrap the exterior with plastic tape (both the gas and fluid pipes must be wrapped with insulation sheets)
Indoor Unit
Recommended bubble liquids
Bubble Liquid
Manufacturer
SNOOP
NUPRO (USA)
Gas piping
Liquid piping Make sure to add insulation to the pipe
union and cap nut.
Liquid valve
Gas valve
Make sure to add insulation to fluid pipes.
(To prevent performance from
deterioration due to external
Yokogawa & Co., Ltd. (Japan).
Make sure to check refrigerant leakage. Mass refrigerant leakage will cause:
- Oxygen insufficiency.
2. Toxic gas production in contact with heat.
temperature influence and pipe surface
condensation due to low pressure).
Manifold gauge set
Nitrogen cylinder (for welding and air-tightness test)
Vacuum pump
Guidelines for Refrigerant Pipe Installation
11
3-3 Pipe Length DIP Switch (DSW) Settings
Adjust DSW2 settings as shown below when the refrigerant pipe is under 5m or over 30m.
DSW2 (pipe length and auxiliary function setup)
Change settings when the refrigerant pipe is under 5m or over 30m
Factory Settings
Pipe is under 5m
Pipe is over 30m
3-4 Refrigerant Filling Level
(1) Refrigerant filling level and standard pipe length at shipping by model
Refrigerant filling level (kg)
Standard pipe length (m): l
z Tolerance of refrigerant filling level: ±0.1kg.
112FPSQB
3.2
125/140/160FPSQB 3.4
30
z Over- or under-filling of refrigerant will cause anomalies or compressor fault. Fill in
Calculate the additional pipe length before filling in additional refrigerant
exact level of refrigerant only.
to ensure the required quantity of refrigerant. Calculate the required
z Make sure R410A refrigerant is in liquid
quantity of refrigerant as shown below and 3-2 Guidelines for Additional
form before filling.
Refrigerant Filling.
(2) Calculation of additional refrigerant filling Pipe length L(m) calculation a) L(m)<30m: No need of additional refrigerant. b) L(m)>30m: Add refrigerant. Calculate the required quantity of refrigerant as shown below: W (additional refrigerant) = ( L-l) x P
L: Pipe length l: Standard pipe length (30m) P: Compensational value (60g/m).
(Example) L=L0+L1+L2=25+6+3=34m L-l =34-30=4m Additional quantity of
refrigerant W=( L-l) x P=4m x 60 g/m =240g
(3) Fill in the additional quantity of refrigerant (W) calculated in (2).
3-5 Recovering Refrigerant
Follow the steps below to recover refrigerant from the outdoor unit before
relocating the indoor and/or outdoor unit(s).
- Connect the manifold gauge set with the gas interceptor valve and liquid interceptor valve.
- Turn on the A/C power. 3) Set DSW1-1 on the outdoor unit to ON (unit
operation starts). Close
the liquid interceptor valve. Start refrigerant recovery. 4) When the low pressure (gas interceptor valve) is -0.01MPaG
(-75mmHg), quickly run the following actions: 1. Close the gas interceptor valve. 2. Set DSW1-1 to OFF (unit operation stops). 5) Shut down the power.
Manifold gauge set
Caution: Make sure pressure is not below -0.01MPaG. Pressure below -0.01MPaG will cause compressor damage.
Set DSW1-1 to ON.
Gas interceptor valve Liquid interceptor valve
12
4. Wiring
(1) Electrical work Ask a qualified agent (electrician) to carry out
electrical work with reference to national electrical regulations.
- Wiring with 1230VAC. Select wire gauge according to the following guidelines. There are two ways of wiring: 1. From the outdoor unit (Method B).
- Individual power supply for the indoor and outdoor units (Method C).
From the outdoor unit (Method B)
AC 1Phase. 230V/60Hz
Power SW
ELCB
Outdoor Unit
Indoor Unit
Wired Remote Control
(Optional)
Unit 1
Indoor Unit
Wired Remote Control (Optional)
Unit 2
Earth
A/C In
Operation circuit wiring spec: DC5V (bipolar). Do not overload.
Remote control wiring spec: DC5V (bipolar). Do not overload.
In a multi-split combination, each indoor unit can operate individually. To synchronize the operation of all indoor units, set DSW6-1 on the outdoor unit to OFF.
Individual power supply for the indoor and outdoor units (Method C)
Singe phase:
AC 1Phase. 230V/60Hz
Power SW
AC 1Phase. 230V/60Hz
Power SW
ELCB
Outdoor ELCB Indoor Unit
Wired Remote Control (Optional)
Unit 1
Indoor Unit
Wired Remote Control (Optional)
Unit 2
AC In
Operation circuit wiring spec: DC5V (bipolar). Do not overload.
Operation circuit wiring spec: DC5V (bipolar). Do not overload.
Precautions y Follow the instructions in the installation manual of the indoor
unit when wiring is different. y Connect the operation circuit of the outdoor
unit and indoor unit with 0.75-1.25mm2, 2C (type: VCTF, VCT, CVV,
MVVS, CVVS, VVR, VVF) or 2C stranded (type: KPEV, KPEV-S equivalent). Also,
wire length must be under 1,000m. y Wires other than the 2C and 2C stranded
wires mentioned above can be used in H-LINK systems and wiring under 100m. y
Connect the wired remote control and the operation circuit of the indoor unit
with 2C stranded wires (type: KPEV,
KPEV-S equivalent). Also, wire length must be under 500m. Wires (0.3mm2) other
than double stranded wires can also
be used for wire length under 30m. y When shielded wires (type: MVVS, CVVS,
KPEV-S) are used for connecting the operation circuit of the indoor and
outdoor units, earth with shielded wires.
Precautions for H-LINK system connection y The factory setting of unit
terminal impedance (DSW5-1: ON) is shown on the right diagram.
When more than two outdoor units are connected to the H-LINK, disabled the
terminal
impedance (DSW5-1: OFF) from the second outdoor unit onward. Make sure that
the
terminal impedance of only one outdoor unit in the H-LINK is ON. When there is
only one
outdoor unit, do not change the factory setting. y Use the same type of cables
for all units on the H-LINK.
Factory Setting: DSW5-1: ON.
Located on the mainboard of the outdoor unit.
Precautions for Indoor and Outdoor Units Wiring (Methods Gas refrigerant pipe
Fluid refrigerant pipe
B and C)
When connecting the outdoor unit and the indoor unit, the
distance between the operation circuit of the outdoor unit and the
Power circuit cable between the indoor
230V power line should at least be 5-6cm. Therefore, do not use and outdoor units.
Operation circuit cable between the indoor and outdoor units.
co-axil cables. Also, when the power source of the A/C and other machines is in parallel, keep at distance of at least 1m. When it is unable to separate them, wire the power line wire
Insulation materials for pipe should resist the heat from the pipe.
inside a metal conduit (earthed on one end) to separate them.
13
One to One (Method B: Power supply from the outdoor One to One (Method C: Individual power supply for
unit)
indoor and outdoor unit)
Indoor unit
Outdoor unit
Indoor unit
Outdoor unit
Remote control
One to Two/Four(Method B: Power supply from the outdoor unit)
Indoor unit
Indoor unit
Outdoor unit
Remote Control
One to Two/Four(Method B: Power supply from the outdoor unit)
Indoor unit
Indoor unit
Outdoor unit
Remote control
Remote controls
Precautions Install an ELCB at the No Fuse Breaker (NFB) or manual switch of
the branch circuit marketed “” near the packaged
A/C. Use a high-sensitivity, high-speed (trip time < 0.1 second) ELCB of the
required capacity for high frequency operation (for inverter use).
“B” and “C” in the table below refer to “Method B” and “Method C”.
Power SW
Wire Gauge (mm2)
ELCB Rated
Indoor/Outdoor Connection
Mode/Shape
Current (A)
Rated Current (A)
Fuse Size (A)
Outdoor Unit RAC-
Vol B tage
C
Outdoor
C B Indoor
C Outdoor
C B Indoor
C Outdoor
C Indoor
B
<10 m
Power Cable
C Outdoor <20m
Wiring
C
B Power
Indoor <20m <35m <50m <70m <75m
B, C Operation
Indoor Connection
Earth
Remote Control
Circuit Power Cable
Cable
AC
1
112/125/140/ 160FPSQB
230 V
50
50
5 60 60 30 35 35
5 8.0 8.0 8.0
2.0
2.0 2.0 2.0 2.0 3.5
Above 0.75
2.0
2.0
Above 0.75
60
Hz
ELCB Selection Determine the rated current of the ELCB based on the total wiring capacity shown in the right table. Determine the ELCB model, sensed current, and trip current based on the information shown in the right table. Use high-sensitivity, high-speed (trip time < 0.1 second) ELCB. Confirm the ELCB rated current, sensitivity, and trip time and protective coordination of the upper part.
Rated Current (A)
15, 20, 30
40, 50
ELCB Mode (trip current)
Rated Sensed Current (mA)
EX-30(5kA),
EX-50B(10kA),
30
EX-50C(35kA)
EX-50B(10kA), EX-50C(35kA)
30, 100
60, 75, 100
EX-100(10kA), EX-100B(35kA)
100
Note 1. Use high-sensitivity, high-speed ELCB with rated sensed current under
30mA or medium-sensitivity ELCB with rated
sensed current over 500mA. The trip time of both types must be within 0.1
second. 2. Use high-frequency ELCBs for inverter use.
Select transformers according to the instructions below. Transformer CapacityMaximum Wattage ×1.3
Determine maximum wattage as shown below:
Type
RAM-112FPSQB RAM-125/140/160FPSQB
Max. Current (A)
27
28
14
(2) Wiring connection port 1) The indoor unit wiring connection port, please according to the indoor unit installation manual instruction
Keep an appropriate distance among terminals. Insulate terminals with plastic
tapes or bushings.
Plastic tapes or bushings Note: Do not use terminals for single-core cables.
When using single-core cables, do not use spade terminals. Directly connect
single-core cables to the terminal block as shown in the diagram below.
Overheating may occur at contacts.
Terminal Block (TB1)
L1 L2 1 2 N
Power cable Indoor-outdoor (AC 1 230V) cable (DC 5V).
Precautions for Wiring
Upper Right Panel Cover
Cable Tie 1. Tie cables together as shown
below with cable ties.
2. Tie cables together and
separate them from the pipes, compressor, other parts, and metal frame.
Fold up cables and retain adequate length for service to prevent removing
cables from the terminal.
Earth cable Main power cable
Operation circuit cable
Power cable
Conduit Pipe cover
Precautions for Conduits
When using conduits, prevent conduits from entering the outdoor unit. This may
risk contacting the compressor or circulation pipes to cause damage.
(3) Wiring Indoor and Outdoor Units 1)Please connect the indoor and outdoor
units according to the electrical work instructions in p.13.
1. (No connection for T for single-phase indoor units.) Also, lock the screw
of the terminal block with the torque as shown in the right table.
2. Please refer to the Electrical Equipment Standards to implement electrical
work. 3. Do not connect a 230VAC source to terminal blocks and of the outdoor
unit. Wrong
connections will damage the mainboard. Do not connect a 230VAC source to them.
Locking torque
Screw Locking torque (N·m)
M4
1.0~1.3
M5
2.0~2.5
M6
4.0~5.0
M8
9.0~11.0
M10
18.0~23.0
Terminal Block
Terminal Block
AC 230V Indoor-Outdoor DC 5V
AC 230V Indoor-Outdoor DC 5V
(Methods B and C)
2) Does the voltage of the power source comply with the rated voltage? Over-
or under-voltage will damage the unit. 3) Is the capacity of the power source
adequate to support the unit? Inadequate power capacity may cause mass voltage
drop and the unit cannot be activated. 4) Failure to earth the indoor and
outdoor units may cause electrical shock. Make sure to earth them according to
Type 3
method at impedance under 100. Ask a qualified electrician to implement the
work. 5) Make sure to disconnect power source before opening the electrical
panel for wiring or service to prevent electric shock.
Warning When installing the panel cover, avoid jamming wires together to prevent electric shock and fire.
15
5. Test Run and Handover
5-1 Test Run
Precautions for Test Running 1) Check insulation impedance between electrical
terminals and earth with a 500V insulation tester. Impedance must be over 1M.
Re-check insulation impedance if it is below 1M. 2) Make sure the interceptor
valve of the outdoor unit is fully open before test run. 3) As the main switch
is open phase, the alarm code on the remote control is “05” when operating the
unit. Check power supply and related
equipment. 4) Check if the oil heater is operating. 5) Connect to the power
supply for at least 12 hours before test run. 6) When operating the cooling
function, room temperature must be over DB21.5ºC and WB16ºC, and outdoor
temperature over DB0ºC. 7) Connect the pressure meter according to the piping
precautions (p.9) when releasing pressure from the pipe union.
About Insulation Impedance
Impedance measured with the 500V insulation tester must be over 1M. Re-check
insulation impedance if it is below 1M. During commissioning or after
disconnecting from the power supply for a long time, insulation impedance
reduces, as refrigerant in the
compressor is stagnant. The ELCB will trip when insulation impedance is below
1M. Re-check to verify the following: Verification contents
Disconnect the compressor from power supply and measure the insulation
impedance of compressor. When impedance is below 1M, other electrical parts
may be poorly insulated.
When the insulation impedance of compressor is below 1M, remove wires
connecting the compressor and the inverter mainboard before alimentation.
Measure insulation impedance again after alimenting the oil heater for three
hours. If impedance is normal, there is no problem with the compressor.
Otherwise, there may be a compressor problem. (Extend alimentation as
necessary based on the air condition and refrigerant status in the pipe.)
Note: When re-connecting the compressor cables, make sure flag terminals are
securely locked. Adjust terminal clamping pressure with a pair of clamps
before inserting and locking on the terminal block. If the ELBC trips, check
if the rated capacity of the ELBC meets the requirements as shown in p. 14.
Use ELCBs for inverters (<30mA) or high-sensitivity ELCBs (trip time<0.1
second).
- Run commissioning after completing indoor unit installation before handing
over to the customer. Follow the steps below to run test and verify if there
are abnormalities.
Press the Run/Stop and CHECK buttons on the remote control at the same time for 3 seconds or longer. “Test Run” and “Connected No. of Indoor Units” will be shown on the LCD display. When multiple units are connected, check the total number of connected indoor units. If the number of connected units shown on the LCD display is smaller than the actual
number of connected units, check if there is poor wiring. Then, press the Run/Stop again to set the desired operation model. Press the Run/Stop button
The operation indicator illuminates and operation starts. The program will shut down the unit after 2 hours automatically. On the LCD display, the information reads: “TIMER OFF” “2 H”. Although temperature adjustment is disabled after test run in “”, the
protective device is effective during unit operation. Press the LOUVER button on indoor units equipped with the auto swing function to verify the deflector response. Press the
LOUVER button again to stop the deflector. Test Run will end in two hours (automatically) or by pressing the Run/Stop again. When the protective device activates after an
abnormality occurs, the operation light on the remote control will blink to alert an “abnormality” has occurred, and the error code will appear on the temperature display section on the remote control at the same time. y Display change on the temperature and timer display sections:
Setting Timer Part of The Display
Setting Temperature Part of The Display
Abnormality Occurred
Setting Temperature
(Display in sequence)
Abnormality Indoor Unit NO.
Abnormality Indoor
Unit Refrigerant Cycle
Content of Abnormality (Alarm Code)
Unit Type (Unit Code)
Total Number of Indoor Units That The Same Refrigerant System With The Abnormal Indoor Unit.
Please look up the error, its cause, and troubleshooting in p. 19. Contact a
service technician for help if the situation persists.
When the operation light blinks every 2 seconds repeatedly, this means there
is a signal transfer error between the indoor unit and
the remote control (wires are loosened or disconnected, broken; incorrect
wiring, etc.). y When there is a giggle sound coming out from the mechanical
chamber of the outdoor unit after alimentation, it is the activation
sound of the electronic valve. It is normal and not a problem. y A giggle
sound also comes out from the mechanical chamber of the outdoor unit after
compressor start and stop or defrosting
start and stop. This is because of the pressure difference inside the pipes.
It is normal and not a problem.
16
Test Run Checklist
Customer Name: Customer Address: Outdoor Unit Type:
Seller: Outdoor Unit No. (YY/MM)
Check Date: Checked by: ( / ) Compressor No.
dd/MM/YY
Indoor Unit Type Indoor Unit No. Indoor Unit Type Indoor Unit No.
Check items:
1. Indoor unit fan direction
2. Outdoor unit fan direction
3. Compressor noise
4. Operating for 20+ minutes
5. Air in and out temperature of each indoor unit
In: No.1 DB / WB ºC No.2 DB
Out:
DB / WB ºC
DB
/ WB ºC / WB ºC
Correct/Incorrect Correct/Incorrect Yes/No Yes/No
6. Air in and out temperature of the outdoor unit
In: DB
/ WB
ºC
Out: DB / WB
ºC
7. Refrigerant temperature
Fluid pipe temperature:
ºC
Compressor out temperature:
ºC
8. Refrigerant pressure
Delivery pressure:
MPaG
Intake pressure:
MPaG
9. Voltage
Rated voltage:
V
Operating voltage: L1-N
VL1-L2
V
Start voltage:
V
10. Compressor input power and current
Power:
kW
Current:
A
11. Refrigerant filling level
12. Remote control functions
13. Protective device functions
14. System leakage check
15. Unit interior and exterior cleanliness
16. Unit covers locking status
17. Noise from unit covers
18. Outdoor unit filter cleanliness
19. Heat exchanger cleanliness
20. Outdoor unit interceptor valve status
21. Smooth drainage of condensate from the drain pipe
Correct/Incorrect Correct/Incorrect Correct/Incorrect Yes/No Yes/No Yes/No Yes/No Yes/No Yes/No Open/Close Yes/No
17
Se t
5-2 Menu setup
Menu setup
Run menu setup after the outdoor unit stops. Do not run setup during
operation, in the check mode, and external I/O setup.
Start
DSW2-5 is ON DSW1-4 is ON
Press the CHECK button to show the function selection code. Run setup
according to the instructions. Method PSW2 solid line
PSW3 dotted line
End
DSW2-5 is OFF DSW1-4 is OFF Note 1: Take down the code of each function you
have set when running External I/O setup. Ex. “1” means set.
NO HEATING FUNCTION
Set
Set
Set
Heating Temp. Sensor: OFF Fan runs intermittently Night Mode
Not in Use
Factory Settings PSW1 interchangeable
Factory Settings PSW1 interchangeable
Factory Settings PSW1 interchangeable
External I/O Setup
Run external I/O setup after the outdoor unit stops. Do not run setup during
operation, in the check mode, and external I/O setup.
Start
DSW2-6 is ON DSW1-4 is ON
Press the CHECK button to show the function selection code. Run setup
according to the instructions. Method PSW2 solid line
PSW3 dotted line
End
DSW2-6 is OFF DSW1-4 is OFF Note 1: Take down the code of each function you
have set when running External I/O setup. Ex. “1” means set.
Set 1
Note 2: Settings of each input terminal should be different. The value of
settings greater than the default value is invalid.
Set
Se t
Set
Set
Input Setup 1 CN1 Code 1-2
Input Setup 2 CN1 Code 2-3
Input Setup 3 CN2 Code 1-2
Output Setup 1 CN7 Code 1-,2
Output Setup 2 CN7 Code 1-3
Se t
Factory Setting PSW1 interchangeable
Factory Setting PSW1 interchangeable
Factory Setting PSW1 interchangeable
Factory Setting PSW1 interchangeable
Factory Setting PSW1 interchangeable
Connection Example (input) Connector
1
2 PCB 3
Relay Contact (Standard part)
PCC-1A (optional)
Relay Contact Spec.
Brand/Model OMROM micro-power relay MY1F (or 2F) equivalent Relay
Remarks 110V or 220V
Connection Example (output) Connector 1
Relay Contact (Standard part)
2
PCB 3
PCC-1A (optional)
Relay Contact Spec.
Brand/Model OMROM micro-power relay LY2F DC12V
Not in use Heating Mode Cooling Mode Stop Request
Force Stop Current Control 60% Current Control 70% Current Control 80% Current
Control 100%
Not in use Operation Signal Alarm Signal Compressor ON Signal
Defrost Signal
18
6. Error Code Table
- When “EE” appears, this means there is a critical error; the compressor is probably blown.
Code
Error
Cause
01
Indoor unit protective device activation (float switch)
The float switch is activated when (1) abnormal high water level of the condensate tank or (2) there are pipe abnormalities.
02
Outdoor unit protective device (except for codes 41 and 42)
High-pressure switch (4.15MPaG) activation; outdoor fan locked in cooling mode.
03 Signal transfer error (indoorÆoutdoor)
Loosened or broken wires or incorrect wiring of the operation circuit between the indoor and outdoor units; the fuse of the outdoor unit is blown.
04 Signal transfer error (inverter)
Signal transfer error between the circuit board and the inverter or the power fuse is blown.
05 Phase check error
Open phase of the outdoor unit power supply due to reverse wiring or loosened wires.
06 Outdoor unit voltage error
Outdoor unit is under-voltage, power cable capacity is inadequate.
07
Degree of superheat at compressor outlet drops significantly
The indoor unit electronic valve is locked.
08 Compressor upper temperature is too high. Refrigerant insufficiency or leakage; refrigerant pipe clogging.
11
Air inlet temperature sensor error (indoor unit) (broken wire, short circuit)
Wires are loosened, disconnected, or broken.
12
Air outlet temperature sensor error (indoor unit) (broken wire, short circuit)
Wires are loosened, disconnected, or broken.
13
Anti-frost temperature sensor error (indoor unit) (broken wire, short circuit)
Wires are loosened, disconnected, or broken.
Heat exchanger pipe temperature sensor
14 error
Wires are loosened, disconnected, or broken.
(indoor unit) (broken wire, short circuit)
19 Indoor unit fan motor protection activation Indoor unit fan motor protection activation.
Compressor upper temperature sensor
20 error
Wires are loosened, disconnected, or broken.
(outdoor unit) (broken wire, short circuit)
22
Open air temperature sensor error (outdoor unit) (broken wire, short circuit)
Wires are loosened, disconnected, or broken.
24
Pipe temperature sensor error
Wires are loosened, disconnected, or broken.
(outdoor unit) (broken wire, short circuit) Heating outdoor fan motor is locked.
31 Indoor/outdoor unit capacity mismatch Indoor unit capacity is 100-130% higher than the outdoor unit capacity.
35 Indoor unit number setup error
Repeated number setting or the number is greater than the connected number of indoor units.
38
Protection check circuit error (outdoor unit)
Error of the outdoor unit protection check circuit.
41
Cooling overload (high pressure switch activated)
When the outdoor unit protection activates, compressor upper temperature is over 95ºC, and the outdoor unit pipe is over 55ºC.
42
Heating overload (No Function) (high pressure switch activated)
When the outdoor unit protection activates, compressor upper temperature is over 95ºC, and the outdoor unit pipe is over 55ºC.
47 Low pressure protection is activated
The unit stops 3 times within one hour, as the evaporation temperature is excessively low. Heating outdoor unit fan motor is locked.
48 Overload protection is activated
Pressure rise due to too much refrigerant, pipe clogged, and circulation error; compressor error (overload, locked, over-current).
51 Current check error
Operation overload (heat exchanger clogged, etc.)
53 Power module protection is activated
Inverter error (overload, over-current, revolution error, start failure); compressor error.
54
Inverter fin temperature sensor error, protection is activated
Fin temperature sensor error, heat exchanger clogged, fan error.
55 Inverter failure
Inverter circuit board error.
57 Outdoor unit fan motor error
Circuit board–fan motor connection: broken wires, incorrect wiring; fan motor fault.
59 Inverter fin temperature sensor error
Wires are loosened, disconnected, broken, and short circuit.
b1 Refrigerant system location error
Set location over 64.
EE Compressor protection error
Three times within six hours.
Note: When the operation light on the remote control blinks every two seconds repeatedly, this means there is a signal transfer error
between the indoor unit and the remote control (wires loosened, disconnected, broken; incorrect wiring, etc.). 2) Check the outlet temperature of each indoor unit during operation. If the temperature difference of different units exceeds the range
(over 10ºC for cooling), this may be a refrigerant piping problem. Check refrigerant piping again. 3) Lastly, please hand over the warranty card, user’s manual, and installation manual to the customer.
Warning! Do not operate the unit before Test run is completed. Check electrical wiring exactly.
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66MP1388
RAC-AF-D
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