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
Product Usage Instructions
Safety Precautions
Precautions for Installation
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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

22

24

26

Pipe Diameter
15.88 19.05

Cap Nut Size B (mm)

R407C/R22

R410A

27

29

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

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

(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+

250+

1000+

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

Max. lapse height between indoor units: H2

3

Max. pipe length between branch pipes and indoor units: L1, L2

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

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

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

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.

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

Outdoor unit

Remote Control
One to Two/Four(Method B: Power supply from the outdoor 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

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

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

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

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

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)