HITACHI RAM-280FSPH Inverter Driven Multi-Split System Air Conditioner Instruction Manual

RAM-280FSPH Inverter Driven Multi-Split System Air Conditioner

Product Information

The product is an inverter-driven multi-split system air
conditioner. It consists of outdoor units that are specified as
RAM-280FSPH(D) and RAM-335FSPH(D). This manual provides
installation and maintenance instructions for these outdoor
units.

Important Notice: This air conditioner is designed for general
use. It should not be used for specific purposes such as food
preservation, animal care, precision machinery protection, or
preservation of works of art.

Installation Restrictions:

• Do not install the air conditioner in areas where gas and oil
  droplets exist, as it can cause fires, machine deformation,
  corrosion, and damage.

• Avoid installation in places with sulfur gas, hot springs, an
  acid or alkaline environment, or near the sea (in a salty
  environment) to prevent corrosion.

• Avoid installing the outdoor unit where electromagnetic waves
  are directly radiated to the electrical box.

• Keep a distance of approximately 3 meters between the indoor
  unit, outdoor unit, controller, and cable from strong
  electromagnetic waves (e.g., medical equipment).

• Avoid installing the air conditioner in locations where wind
  directly affects animals or plants, as it can have adverse effects
  on them.

Usage Restrictions:

• Use the wireless remote controller away from lighting equipment
  or other sources of interference to ensure proper signal
  reception.

Safety Summary:

Before installation, read the safety summary provided in this
manual. Pay attention to danger and caution signs as they indicate
potential risks and hazards. Follow the instructions carefully to
avoid significant harm.

Electrical Works:

• Ensure proper grounding by following the instructions provided
  for ground work.

• When performing electrical work, it is recommended to hire
  qualified personnel to avoid electric shock.

• Follow the Installation Manual and relevant regulations and
  standards for electrical work to prevent electrical shock and fire
  hazards.

• Use specified wires for wiring between products to avoid fire
  or electric shock caused by using the wrong wire.

Before installation, please read this manual carefully and keep it properly.

INVERTER-DRIVEN MULTI-SPLIT SYSTEM AIR CONDITIONERS
Outdoor Units

InstallationMaintenance Manual

RAM-280FSPH(D) RAM-335FSPH(D)
This manual makes sure to transfer to the next step of construction, and finally the customer keeps it. (Transportation and Handling) (Refrigerant Piping Work) (Electrical Wiring) (Test Run) (Customer)
Important Notice
The air conditioner for general use. Food, animals and plants, precision machinery and preservation of works of art and other special purpose, please do not use.
Do not install in the following places. If you have gas and oil droplets exist around, it will cause fires and machine deformation, corrosion, damage. Oil (including machine oil) of the droplets, oil gas and more places. The sulfur gas and hot springs more places.
Do not install in the following places, it will cause corrosion. Near the sea (in the salty environment). An acid or alkaline environment.
When produce electromagnetic waves used in medical equipment places, please note that the air conditioner to prevent malfunction.
Do not install the outdoor unit where the electromagnetic wave is directly radiated to the electrical box.
Do not install the indoor unit, outdoor unit, controller and cable within approximately 3 meters from strong electromagnetic waves such as medical equipment.
Do not install in the animals or plants will be directly affected by the wind to the place, otherwise have adverse effects on plants and animals. Use the wireless remote controller, since they will be affected by the lighting equipment, etc., resulting in the receiver to receive signals failed,
therefore as far as possible away from the receiver and the lighting of more than 1m.
Safety Summary
Before installation, This is a ” Safety Summary ” in the content, be sure to read, for the correct installation. In this manual to note that the ” Danger” ” Caution”, when the installation error, it may lead to significant harm, particularly marked.
Therefore, an important part of safety, please be sure to actually follow. When the installation is complete, and then test run, to confirm whether there is abnormal. Please follow the manual’s instructions, using the
method, maintenance method for illustration to customers, and the installation manual and operation manual by the customers really to keep.

Definition for signal words DANGERImmediate hazards which will result in severe personal injury or death.
About electrical works

Enforcement mattersMachine with a ground terminal, the user must follow the instructions for ground work.
Prohibitions. Enforcement mattersIndicating the general behavior
(Non-specific object).

When perform electrical work , please have a qualified personnel. Please note that the construction is not completely by yourself, there will be occurred an electric shock.
Perform electrical work according to Installation Manual and all the relevant regulation and standard. If the instructions are not followed, an electrical shock and fire may occur due to insufficient capacity and inadequate performance.

The wiring between products, please use the specification wire. Select the wrong wire, it will cause fire or electric shock.
DANGER Ensure that the wiring terminals are tightened securely with the specified torques. If not, generating fire or electrical shock at the terminal’s connection part may occur.
Fix the cables securely. External forces on the terminals could lead to a fire.

Use an ELB(Earth Leakage Breaker)In the event of fault, there is danger of an electric shock or a fire if it not used.
Due to electrical wiring, inspection work and open the service cover, completely turn off the power to implement in order to avoid electric shock.
Check that the ground wire is securely connected. If the unit is not correctly grounded, it leads electrical shock. Do not connect the ground wiring to gas piping, water piping, lighting conductor or ground wiring for telephone.

About installation

When installation, make sure you follow the installation manual. If the instructions are not followed, it may result in a water leakage, electric shock or a fire.

Please install the unit where is able to withstand the weight. Strength, and installation is not complete, the body may fall and cause injury.

DANGER

Please do not place flammable gas and have doubts about the place to the installation, it may cause fires and other accidents.

Do not climb air conditioner, or place objects on top, so as to avoid falling damage.

In case of refrigerant leakage occurs, please immediately turn off the fire source (such as: stoves and other appliances), remove the refrigerant on the ground, open the doors and windows to ventilation , and contact your service contractor.
The indoor unit drain pipe do not directly into the drainage ditches. The biogas will be produced through the drainpipe into the indoor, resulting in poisoned phenomenon.

66MP1570
1

Use the adequate non-flammable refrigerant(R410A) to the outdoor unit in refrigerant cycle. Do not charge Oxygen, acetylene or other flammable and poisonous gases. These types of gases are extremely dangerous can cause an explosion and fire.
Condensation water drain pipe, please make sure that it can be drained. Incorrect piping may cause water to enter the house or wet furniture.
Please tighten the flare nut with specification torque. If the torque too much, it will result in flare nut cracking, and make the refrigerant leakage phenomenon.
Caution During the field decoration construction, prohibition of the unit operation, and prepare the unit to prevent dust and defacement.
Before the unit operation, please make sure is the field cleaned finish? Objects floating in the air, has the smell cleared? Has the unit been cleaned? To prevent future the unit is not cold or water leakage.

1. Common Items

1.1 Combination of Indoor Unit and Outdoor Unit

Please refer to the table, the selection of outdoor unit and indoor unit number and capacity.

Indoor Unit

Outdoor Unit Model

Combination Capacity of Ratio (For Outdoor Unit)

Combination Quantity

RAM-280FSPH(D)

50~130%

14

RAM-335FPSH(D)

For the system which all indoor units are operated simultaneously, the total indoor unit capacity should be less or equal to the outdoor unit capacity.
For the system which all indoor units are not operated simultaneously, the total indoor unit capacity is available up to maximum against the outdoor unit capacity.

1.2 Operation temperature range

Condition Item
Cooling

Air inlet temperature of outdoor unit
-5 DB 43 DB

Air inlet temperature of indoor unit ( non-room temperature)
21 DB/15 WB 32 DB/23 WB DB: Dry Bulb WB: Wet Bulb

1.3 Cooling operating instructions The same refrigerant system of indoor unit, the cooling shall be operated.
1.4 Note This system can not operate within 4 hours of powered, stop reason code will be displayed “d1-22”, If you want to operate in 4 hours, please follow the steps to release the protection settings: 1) Please power ON indoor and outdoor unit. 2) Wait 30 seconds. 3) Press the outdoor unit’s arrangement of PSW1 above 3 seconds.
2. Transportation and Handling
2.1 When transporting the outdoor unit, please observe the following items, please state as much as possible to keep the
packaging moved to the location of installation. The hanging method under packing situation:
Please hang the unit under packing condition with two ropes.

The center of gravity
Handle
Wooden Base

2

2.2 The following is accessory parts of the outdoor unit. Please confirm it before installation.

Accessory

Q’ty

Use Place

Use Method

Pipe Combination

1

Use to connect gas piping.

Please refer the piping work on page 9.

Drain Connector Washer

1

Base condensation water exhaust.

Please refer the foundation work on page 9.

1

3. Before Installation
3.1 The R410A refrigerant pressure higher than R22 about 1.4 times, it is more susceptible to moisture, acid materials, oil and other impurities influence. Because of the new refrigerant, refrigerant oil also will be changed. Therefore, when installation, be careful not to water, impurities, the existing use of the refrigerant and refrigeration oil mixed in the cycle system.

The product of the design pressure is 4.15MpaG.

3.2 To avoid accidental mixing of different refrigerant or different refrigerant oil, the sizes of the charging connections have

to be changed. It necessary to prepare the following special R410A tools before performing the installation work.

The measuring machine or tool which will contact the refrigerant, please use specially for the new refrigerant.

Symbol Descriptionfor new and old type refrigerant only for R410A (not for R22)

only for R407C (not for R22) for two type R410A and R407C.

Interchangeability

Reason of Non-Interchangeability and Attention

Measuring Instrument and

with R22

Tool

R407C R410A

(Only for new refrigerant) (Strictly Required)

Use

Pipe Cutter

Cutting PipeRemoving Burrs

Flaring Tool

Extrusion Adjustment Gauge

(Not use)

Pipe Bender

Expanding Tool

Refrigerant

Pipe

Torque Wrench

To ensure the high pressure of R410A, if using flaring tube, make the dimension of tube larger for R410A. If you continue to use existent products, shall be used with the flaring tube adjustment gasket (1mm). Using the 1/2H pipe situation, can not be processed.
(R410A special flaring tool can be used directly in the R407C)
Using the 1/2H pipe situation, can not be processed. Please use the elbow welding connection.
Using the 1/2H pipe situation, can not be processed. Please use the elbow welding connection.
R410A for12.715.88;spanner size is up 2mm; existent products can not be used.
For 6.359.5319.05; spanner size is the same.

Flaring for Tubes
Dimensional Control for Extrusion Portion of Tube after Flaring
Bending Expanding Tubes
Connection of Flare Nut

Brazing Tool Nitrogen Gas

Perform correct brazing work.

Strict control against contamination. (Blow nitrogen during brazing)

Brazing for Tubes
Prevention from Oxidation during Brazing

Lubrication Oil

(for Flare

Surface)

Do not use R22 with mineral oil, and products must be

used the same synthetic oil. Synthetic oil absorbs moisture quickly, Therefore, to

Applying Oil to the Flared Surface

avoid damp places.

Measuring Instrument and Tool

Vacuum Drying

Refrigerant Cylinder

Refrigerant Vacuum Pump Change Adapter for Vacuum Pump (Prevent from reverse)

Interchangeability with R22
R407C R410A

Reason of Non-Interchangeability and Attention

(Only for new refrigerant)

Use

(Strictly Required)

(Brown) (Pink)

Check refrigerant cylinder color.
Filled with the gas refrigerant is strictly prohibited Liquid refrigerant charging is required regarding Nonazeotropic refrigerant.

Refrigerant Charging

The current ones are applicable. However, it is required

to mount a vacuum pump adapter which can prevent Vacuum Pumping

from reverse flow when a vacuum pump stops,

resulting in no reverse oil flow.

3

Manifold Valve

Vacuum Drying

Charging Hose

Refrigerant Change Charging Cylinder
Weight Scale
Refrigerant Gas Leakage Detector

Prohibited

No interchangeability is available due to higher pressure

when compared with R22.

R410A connection diameter1/2 UNF

Vacuum Pumping; Vacuum

R407C connection diameter7/16 UNF

Holding.

Do

not

use

current

ones

(R22)

to

the

different

Refrigerant Charging Check of Pressures

and

refrigerant ; If used, mineral oil will flow into the

cycle and cause sludge, resulting in clogging or compressor failure.

Please use the weight scale.

Refrigerant Charging

The current gas leakage detector(R22) is not applicable due to different detecting method.

Measuring Instrument for Refrigerant Charging
Gas Leakage Check

3.3 The piping and connection parts, use the following R410A. Flare nut and the front part of pipe flare size also changes, according to the following specifications used.

Pipe FlareSize

Piping Diameter d

0
Dimension A 0.4
R407CR22

Unitmm R410A

6.35

9.0

9.1

9.53

13.0

13.2

12.7

16.2

16.6

15.88

19.4

19.7

19.05

23.3

Can not be processed (1/2H material)

Please use the attached flare connecting pipe.

Pipe thickness selected With the design pressure changes, the pipe thickness and material should also be changed.

New Refrigerant Piping Thickness (mm)

Existent Type

New Refrigerant

Pipe Size

R22

R407C

R410A

Thickness Material Thickness Material Thickness Material

6.35

0.6

O

0.8

O

0.8

O

9.53

0.8

O

0.8

O

0.8

O

12.7

0.8

O

0.8

O

0.8

O

15.88

1.0

O

1.0

O

1.0

O

19.05

1.0

O

1.0

O

1.0

1/2H

22.2

1.2

O

1.15

O

1.0

1/2H

25.4

1.2

O

1.0

1/2H

1.0

1/2H

28.6

1.4

O

1.0

1/2H

1.0

1/2H

Department of the connection selected

With the design pressure changes, the connection pipe (elbow etc.) thickness are also part the changes. When use 1/2H material, the bending and flaring can not be processed, so please follow the rules below the minimum thickness choose the appropriate connecting pipe. Please note that the size of flare nut is also part change.

Connection minimum thickness (mm)

Pipe Size
6.35 9.53 12.7 15.88 19.05

R407CR22 0.5 0.6 0.7 0.8 0.8

R410A
0.5 0.6 0.7 0.8 0.8

Pipe Size
22.2 25.4 28.6 31.75 38.1

R407CR22 0.9 0.95 1.0 1.05 1.25

R410A
0.9 0.95 1.0 1.1 1.35

Flare Nut

Pipe

Pipe Size
6.35 9.53 12.7

Flare Nut Size B(mm)

R407C R22

R410A

17

17

22

22

24

26

Pipe Size
15.88 19.05

Flare Nut Size B(mm)

R407C R22

R410A

27

29

36

36

4

4. Installation Work 4.1 Outdoor unit installation place selected (common items) 1) Make sure the outdoor unit installation space, convenient to the normal operation and maintenance services.
2) Install the outdoor unit where good ventilation is available, and where it is dry.
3) Install the outdoor unit where it is in the shade, or it will not be exposed to direct sunshine or direct radiation from high temperature heat.
4) Install the outdoor unit where the sound from the outdoor unit does not affect neighbors. 5) Unit air outlet does not directly flow to the plant or neighbor’s windows. 6) Provide a foundation so that the entire feet of the outdoor unit can be mounted on the foundation. 7) The place where the heat exchanger will not inhale the dust and paper scraps. 8) Installed as far as possible where is without reverse wind (the wind blowing directly against the fan).
Installed on the roof and no buildings surrounding, and there may be strong winds blowing directly against the unit. Please note that strong winds do not blowing directly against the air outlet grille of the unit. 9) Can not be setting inside the house. 10) Do not place flammable objects near the unit, it may cause fires. 11) Do not install the outdoor unit where there is a high level of oil mist, salty air or harmful gases such as sulphur. 12) Do not install the outdoor unit where the electromagnetic wave is directly radiated to the electrical box.
13) Install the outdoor unit as far as at least 3 meters from the electromagnetic wave radiator.
Strong wind blowing directly against the product installation method
Installed on the roof and no buildings surrounding, and there may be strong winds blowing directly against the unit. Please follow the instructions below:

Please note that strong winds do

When strong winds blowing directly against the air outlet grille.

not blowing directly against the air outlet grille of the unit. When strong winds blowing directly against the air outlet grille of the unit, making the necessary air flow can not ensure that the body will result in failure.

(1) Option the wind break cover plate.

(2) When have a shelter of the wall

Strong winds direction

Wind break cover plate

Wall

Air inlet Let air outlet grille

facing shelter of

the wall or other

buildings.

Air outlet
NoteThe air outlet of outdoor unit suffered strong winds bluster continually, the fan speed may be due to high speed reversed and damage.

Strong winds

Strong winds Please ensure that service space more than 600mm.

Option The Wind Break Cover Plate Type

Type

Q’ty

WSP-335A

2

When on the roof or open space, the strong
winds will bluster the unit. Please make steel wire cable and others fixed the unit.

5

4.2 Installation Space

Around the outdoor unit must ensure the maintenance of space as shown below.

1. Obstruction in the air inlet side
   (a) When the above open

A separate installation

A row installation (two more)

(Unit: mm)

The Side Is Open 200 Above

The Side Has Obstruction 300 Above

300 Above

Front Side

50 Above Front Side

100 Above

With the unit front side same direction.

Front Side

Front Side 100 Above

Note: Must be opened on both sides.

Note: Must install the wind break cover plate (Option), and both sides must be opened.

100 Above

Note: Must install the wind break cover plate (Option), and both sides must be opened.

350 Above

350 Above

(b) When obstruction at the top. A separate installation
300 Below
1000 Above

350 Above 300 Below

350 Above

1000 Above
Note: Must install the wind break cover plate (Option), and both sides must be opened.

(Unit: mm) A row installation (two more)

300 Below 100 Above

1000 Above

Note: both sides must be opened.

350 Above

300 Below 100 Above

(Setting two sets situation) 1000 Above

350 Above

Note: Must install the wind break cover plate (Option), and both sides must be opened.

6

2. Obstruction in the air outlet side (a) When the above open A separate installation
   700 Above Front Side

100 Above

50 Above

With the unit rear side same direction.
Note: Must install the wind break cover plate (Option), and both sides must one side be opened at least.

350 Above

Note: Must install the wind break cover plate (Option), and both sides must be opened.

(Unit: mm) A row installation (two more)
100 Above
700 Above

Note: Must install the wind

break cover plate

150 Above

(Option), and both sides must be

opened.

(Setting two sets situation)

700 Above
3) Obstruction at both sides (a) When the above open A separate installation

700 Above 350 Above

(b) When obstruction at the top.

(Unit: mm)

A separate installation

1000 Above

1000 Above

500 Above 50 Above

500 Above 100 Above

500 Above 50 Above

500 Above 100 Above

Note: L
0 < L 1/2H 1/2H < L H

(Unit: mm) A
600 Above
1400 Above

When LH, please set the metal framework under the outdoor unit which will make HL, in order to prevent the unit blowing air bypass, and set the metal framework sealed.

4. Multiple rows side by side installation (roof, etc.) 300 Above

Even if the right and left sides open, the outdoor unit must be spaced more than 100mm. AB size please refer to the table

L 0 < L 1/2H

A 600 Above

(Unit: mm) B
300 Above

1/2H < L H 1400 Above 350 Above

(Note) When LH, please set the metal framework under the

outdoor unit which will make HL, in order to prevent

the unit blowing air bypass, and set the metal framework sealed.

600 Above

7

Below
21mm Below
(A After Cut Off)

4.3 Foundation Work 1) Anchor bolts installation, lock method and fixed examples.

Unit Base Nut Washer
Anchor Bolt (M12)
Concrete Filled Mortar

4-16 x 23.5 Long Hole
If ensure 170 dimension, and without interference with foundation base, it can be downward the piping work.

Concrete
Using this type of Anchor Bolts, be sure
to cut off the A .
(Due to remove the pipe cover difficulty)

Anchor Bolt

2. To avoid dumping the body resulting noise, or due to gusts and earthquakes caused by inclination. So be sure to make the outdoor units foundation work is really.

Fixed Bracket (Fielded supplied)

To avoid the unit vibration transmitted to the buildings, if necessary to install anti-vibration rubber.

3. Confirm the drainage smooth flow
   When Defrost operation, the condensation water will be discharged, select the best drainage of areas, the water discharge to drainage ditch. The drain hole position shown at right:

AirInlet DrainHo(le 26) (20)

(Unit: mm)

4. Setting shelf use standard parts, when the standard parts width narrower than outdoor unit base bracket, please follow

the figure belowbetween the standard parts shelf and outdoor unit base bracket feet, into the wider flat to withstand

full weight of the outdoor unit.
Outdoor unit base bracket can not fully load the unit weight.

Outdoor unit base bracket can fully load the unit weight.

Outdoor Unit Base Bracket Width100mm

Flat recommended SizeSPHC (Fielded supplied) Unitmm Flat Thickness4.5mm

Hole

Shelf Setting

Shelf Width 60 mm (Standard Parts)

Shelf Setting

Flat Flat Width 100 mm

(560)

8

5. The drain connector installation methods:

1. Setting the washer on the drain connector convex (around) upper part.

Drain Connector

2. Meet the base drain holes shape, the drain connector turns right

about 40 ° and into the base.

3 The drain connector is equivalent to VP16.

4 The drainpipe is field supplied.

NoteThe drain connector which is installed for defrosting or reservoir condensation

water to discharge.

Base Drain Hole
Washer

5. Refrigerant Piping Work
5.1 Refrigerant Pipe 1) Refrigerant pipe selection 1.1 Please prepare the refrigerant pipe by field supplied. 1.2 Select clean copper pipes. Make sure there is no dust and moisture inside of the pipes.
Cut off the refrigerant piping, use the pipe cutter. Blow the inside of the pipes with nitrogen or dry air, to remove any dust or foreign materials before connecting pipes. (Avoid using a saw or grinding stone tools so easy to produce powder.)
Cautions for refrigerant piping work (for example)

Hole of wall

When installing pipe through the wall. Secure a cap at the end of the pipe
Attach a cap or vinyl tape

Do not place the pipe directly on the ground.
Attach a cap or vinyl tape

Attach a cap or vinyl tape

Rainwater can enter

Rubber band

2. Piping Direction The pipe can be connected in four directions.
   Base Pipe Hole
   Liquid Piping Connection (A Flare Nut)
   Gas Piping Connection (B Piping Connection, combined with Flange combination)

Size

A B

RAM-280FSPH(D) 12.7 28.6

RAM-335FSPH(D) 12.7 28.6
(Unit: mm)

Pipe Combination (accessory parts)
Connecting Pipe Set (Flare Nut) Gas Side Piping

210

Rear Piping (Knock Out Hole)

Front Piping (Knock Out Hole)

Front Piping Cover
Front Piping (Knock Out Hole)

Rear Piping Cover
Rear Piping (Knock Out Hole)
Right Piping (Knock Out Hole) Bottom Piping (Knock Out Hole)

Rear Piping (Knock Out Hole)
Please press the cover and push down, then carefully removed it.
Front Piping Cover
9

B Connecting Pipe
Set (Welding) Gas Pipe Size
Rear
Rear Piping Cover

Open the service cover essentials
1 Please remove the left screw, and press cover by your hand, then remove the screw.
2 Please press the cover and push down, then carefully removed it.
Services Cover (3 Hooks)

3. Refrigerant piping fixation methods: Connect the indoor unit and the outdoor unit with field-supplied refrigerant piping. Suspend the refrigerant piping at certain points and prevent the refrigerant piping from touching the weak part of the building such as wall, ceiling, etc. (If touched, abnormal sound may occur due to the vibration of the piping. Pay special attention in case of short piping length.)

(Fixation Methods Example) Outdoor Unit

Piping fixation Interval

Pipe Size

20Less 25~40

Maximum Interval 1.0m

1.5m

Indoor Unit

10

4. Refrigerant piping limitation and multi-kit pipe: Because the longer pipe, can cause air conditioner cooling and heating reduced capacity, so this factor to be considered for selected piping specifications.
   Piping Connection Example

Outdoor
These figures show examples of 4 indoor units combined with one outdoor unit. The refrigerant pipes are shown as single line in the diagrams. However, liquid line piping and gas line piping are required in the field piping work.

NO.0 Indoor

NO.1 Indoor

NO.2 Indoor

NO.3 Indoor

Maximum Piping Length

Actual Length Equivalent Length The Total Length

The outdoor unit is higher than

that of indoor unit. Maximum Lift

between

The outdoor unit is lower than that

Outdoor Unit of indoor unit.

and Indoor Unit

Between each indoor unit

Maximum

Between Each Multi-Kit and Each Indoor Unit

Piping Length Between Multi-kit “a” And the Farthest Indoor Unit

L1L2l 3150m Below L1L2l 3190m Below L1L2l0l1l2l 3300m Below
H 150m Below H 140m Below H 215m Below l 0l 1l 2l 315m Below l 440m Below

The First Multi-Kit Pipe (a) And L1 Connection Pipe

Outdoor Unit Model RAM-280FSPH(D)

Gas/Liquid Pipe Size ( mm)
28.6 / 12.7

Multi-kit And Connection
Pipe

Others Multi-kit Pipe And Connection Pipe

RAM-335FPS(D) Indoor Unit Total Capacity (kW)
27 23~26.99 15~22.99
15

28.6/12.7
Gas/Liquid Pipe Size ( mm) 28.6/12.7 25.4/9.53 22.2/9.53
19.05/9.53

1: E-N55HT (Header Branch), It can be used that each indoor unit distribution and connection.

Multi-Kit Pipe Type
E-NP452S
Multi-Kit Pipe Type E-NP452S E-NP282S E-N55HT 1

11

Multi-kit pipe please follow the requirement, remove the no used pipe, other pipes will be welded into the multi-kit pipe,
otherwise it will result in reducing cooling capacity.

Line Branch Pipe

Type

E-NP282S

E-NP452S

Gas Piping

Liquid Piping

Header Branch Pipe Type

E-N55HT

Gas Piping

Liquid Piping
5)Setting of the multi-kit pipe The multi-kit pipe which is connected to the indoor unit, be sure to use an optional part of the multi-kit pipe set, in order to prevent the uneven distribution of the refrigerant and causing the unit’s capacity reduction. Do not connect using the connector. 1) Line branch (use the line branch pipe), As shown below Main pipe (The pipe between each multi-kit pipe or the pipe between outdoor units to first multi-kit pipe.) Main BranchThe multi-kit pipe has two multi-kit pipes which connect with more than one indoor unit. Setting ConditionLimited to third branch pipe, but only two main branches.

12

Setting ways of branch pipe:

Best installationsituation

Third B3ranch

Outdoor First B1ranch

Second B2ranch Sec2ond Main Branch

First M1 ainBranch

Third 3Branch
OutdoFoirrs1t BranchSecond2Branch X Wrong
First Main1Branch Seco2ndMain Branch

Allowing installation situation

Outdoor Second 2Branch Third3 Branch First1Branch

Outdoor First 1Branch

Second2Branch Third B3ranch Fou4rthBranch

First M1 ainBranch

Sec2ondMain

First Ma1inBranch

Second M2ainBranch

The line branch pipe fixed limits

X Wrong

Horizontal
The branch pipe must be set in the same plane.

Outdoor unit connection pipe shall ensure that the straight pipe above 0.5m.

Up

Up

Straight Pipe
0.5m Above Up

Same Horizon Plane

Down
Vertical

Down

It is divided into two kinds which is up and down.

Up

Up

Straight Pipe 0.5m Above

Upward Branch

Tilt Angle Within 30°

Tilt Angle (A Direction)

Downward Branch

Straight Pipe 0.5m Above
Down
2) Header branch (use the header branch pipe), As shown below

Down

Correct Setting

Indoor Unit

Header Branch Pipe

Header Branch Pipe

Main Pipe

Wrong Setting Main Pipe

Main Pipe NoteThe header branch pipe cannot be continuous installation.
13

Indoor Unit Header Branch Pipe

The header branch pipe fixed limits
The header branch pipe must be installed horizontally.

3. Mixing setting of line branch and header branch, as shown below

Correct Setting
Maximum length 40m

Correct Setting

First Branch

First Branch

Wrong Setting

Header Branch Pipe

Indoor Unit

Second Branch

Header Branch Pipe

Maximum length 40m
Note: 1.The line branch pipe can not be connected after the header branch pipe. 2.The first branch pipe can not use the header branch pipe.

Header Branch Pipe

Line Branch Pipe

5.2 Refrigerant Piping Work

1. Confirm that the stop valves of outdoor unit are closed.
2. Please connect the piping between indoor and outdoor unit. When tightening the joints of piping, in the inside and outside of flare piping, please coated with a layer of refrigerant oil [ Field-supplied (Idemitsu Kosan Co., Ltd. Synthetic oil” FVC68D”)], and in accordance with the provisions of tightening torque with double spanner to tighten. After tightening, please confirm the gas leakage once more. During brazing, please blowing nitrogen into the piping. Please connect the pipe which use the attached flange combination, while use the attached washer to replace the original washer.
3. Connect the indoor unit and the outdoor unit with field-supplied refrigerant piping. Suspend the refrigerant piping at certain points and prevent the refrigerant piping from touching the weak part of the building such as wall, ceiling, etc. (If touched, abnormal sound may occur due to the vibration of the piping. Pay special attention in case of short piping length.)
4. Please perform the air-tight test. Connect the gauge manifold using charging hoses with a vacuum pump or a nitrogen cylinder to the check joints of the liquid line and the gas line stop valves. Perform the air-tight test. Connect a manifold gauge to the check joints of the liquid and gas stop valves in the outdoor unit. Do not open the stop valves. Apply nitrogen gas pressure of 4.15MPaG.

Required Torque

Spindle Valve Torque Nm

Piping Size (mm) Tightening Torque

and Flare Nut

Nm

Gas

Liquid

6.35(1/4″)

20

20~25

7~9

9.53(3/8″)

40

12.7(1/2″)

60

Hexagonal Wrench

15.88(5/8″)

80

Gas

Liquid

19.05(3/4″)

100

10mm

5mm

Spindle valve of Gas Check Valve
Spindle valve of Liquid Check Valve

(1) After connection piping and before implementation the airtight test, please remove the liquid and gas stop valve caps, the spindle valve ensures that be closed with tightening torque Nm. Tightening the flare nut do not use more than the torque marking on the table, too large torque will result in the spindle valve leakage.

Do Not Apply the Double Spanner Work Here. Refrigerant Leakage Shall Occur.

Stop Valve

Flare Nut

Double Spanner Work

14

(2) After locking work is completed, please implement air leakage test.
Note1. The work that after use the flare nut to connect pipe and stop valve, will be effective. 2. Because check joints and flare nut can not connect, so please use the charging hoses. The spindle valve cap of stop valve is removed, due to internal O-ring and thread will be opened, the voices caused by gas emitting, which has nothing to do with the leakage. 3. Do not apply an abnormal big force to the spindle valve at the complete opening (5.0 N-m or smaller).
5) Insulate the unions and flare-nuts at the piping connections completely. Insulate the liquid piping and gas piping completely to avoid decreasing of performance and dewing on the surface of the pipe.
6) In order to prevent rainwater invasion, the unit, make sure to install the pipe cover, and installation thermal insulation material where the pipe is through the unit, so that it can not have gaps happening.
5.3 Vacuum 1) Details stop valve operation, please refer to the attention of nameplate inside service cover description. 2) Connect a manifold gauge to the check joints at both sides. Continue vacuum pumping work until the pressure reaches-0.1MPa (750mmHg) or lower for one to two hours. 3) After vacuum pumping work, stop the manifold valve’s valve, stop the vacuum pump and leave it for one hour. Check to ensure that the pressure in the mani-fold gauge does not increase. 4) Because check joints and flare nut can not connect, so please use the charging hoses. After the work, please tighten the flare nut with 16N · m of torque. 5) Check for any gas leakage at the flare nut connections, or brazed parts by gas leakage tester or foaming agent. The following is recommended for foam testing fluid [Field-supplied (NUPRO “SNOPP” or Yokogawa & Co., Ltd.” “)], component is not clear which is general household cleaners do not use the liquid as a foam testing.
6) Vacuum drying determination example

Vacuum Degree Vacuum Degree Vacuum Degree

Outside air temperature 23
After the vacuum pump stop, the vacuum degree rebound phenomenon Vacuum pump stop

Outside air temperature 20 System without water System with water

System with water,

System with water,

outside air

outside air

(

temperature 20

temperature 10

Vacuum Time (min) Vacuum Time and Vacuum Degree

Vacuum Time (min) The system includes water vacuum time and vacuum degree

System without water, outside air temperature do not affect

Vacuum Time (min)

Figure3Outside air temperature vacuum time and vacuum degree

Note1. When remove the spindle valve cap of stop valve, there may be slight refrigerant leakage sound is normal.

2. Use tools and measuring instruments only for the new refrigerant (R410A) which directly touch refrigerant.
3. If vacuum degree of -0.1MPa (-750mmHg) is not available, it is considered that leakage exists. Check for any gas leakage once again. If no leakage exists, operate the vacuum pump for one to two hours.

Please implement vacuum drying determination, to confirm whether water exists within the system. If moisture is present, please extend the vacuum time or installation the drying filter until no moisture is present within the system. Be sure to do this work, otherwise in the future the unit could easily lead to failure, and difficult to handle.

5.4 The Additional Refrigerant

1. Outdoor unit has been filled with refrigerant, but still based on the length of pipe filled with an appropriate amount of refrigerant. The

filling amount of refrigerant, please following the liquid piping length and the capacity of the indoor unit calculation, the results please

fill in ”

“.

Calculation formula

WAdditional refrigerant of liquid pipe (kg) = W11+W12+W13

W1112.7 liquid pipe length (m)

×0.12 (kg)=

additional refrigerant (kg)

Model

The factory refrigerant charging
weight (kg)

Additional refrigerant upper limit
(kg)

W129.53 liquid pipe length (m) W136.35 liquid pipe length (m)

×0.07 (kg)= ×0.03 (kg)=

RAM-280FSPH(D)

6.5

RAM-335FSPH(D)

7.8

13.5

W Total=

(kg)

2. Fully open the gas line stop valve and slightly open the liquid line stop valve.

3. Cooling operation, then for charging refrigerant, connect the gauge manifold using

charging hoses with a refrigerant charging cylinder to the check joint of the liquid line

stop valve. (Refrigerant charging quantity of tolerance in the ± 0.1kg around.)

4. Fully open the liquid line stop valve after completing refrigerant charge.

5. Finally, please lock the spindle valve cap of liquid stop valve in according with the following tightening torque.

The cap tightening torque

Liquid 20 Nm

Gas

49 Nm

·Additional refrigerant W
exceeds the amount of additional refrigerant filling upper limit, adjust the length of piping, such that W does not exceed the value of upper limit.

15

6. Please be sure to perform the air-tight test.
   Additional refrigerant too more or too less, will result in compressor failure or others abnormal condition, be sure to charge refrigerant according to calculate values.
   Liquid piping must be implemented thermal insulation. (To prevent poor performance, and low pressure pipe surfaces to prevent condensation.)

Outdoor Unit
Liquid Stop Valve Gas Stop Valve

Mani-Fold Gauge Vacuum Pump

Nitrogen Bottle (Use for Brazing and Air-Tight Test)
Refrigerant Cylinder (R410A) Weight Scale

Be sure to check the refrigerant leakage. If a large refrigerant leakage, it will happen the following phenomena
1. Lack of oxygen.

Gas Piping Liquid Piping

Indoor Unit

5.5 Caution of The Refrigerant Leakage

Branch Pipe Thermal Insulation Material Wrapped
Work

Air conditioner installation in room, in case of refrigerant leakage, refrigerant concentration must not exceed the limits of concentration. The products use non-flammable, non-toxic safety refrigerant R410A, if the indoor unit refrigerant leakage filled entire the room, there will be a choking hazard to happen. Especially multiple indoor unit and outdoor unit of the long-distance piping connection, the amount of refrigerant more than individual air-conditioner. So, make sure the indoor unit installation in the room, even in case of refrigerant leakage, immediate disposal of the refrigerant concentration should also lower than the limits concentration.
Please calculate limits refrigerant concentration by the following formula

The total amount of refrigerant within the system (kg)
Installation the product of the room indoor volume (m3) limits refrigerant concentration

R410A (0.3kg / m3)

The calculation result, if installation products of the room more than the limits concentration, but when the air conditioner must be installed, please choose a treatment method according to the following

1. Setting refrigerant leakage detector alarms linked mechanical ventilation devices. (See below) (Per 1 ton cooling capacity should be more than 0.4 m3/min ventilation capacity. Cooling capacity in the following table, according to the outdoor unit capacity.)
2. Between adjacent room to set the effective ventilation mouth (such as opening mouth of no door or opening mouth which need to set more than 0.15% floor area on the upper and lower of the door), so that the leakage refrigerant concentration below the limit’s concentration.

Example The total amount of refrigerant within the system: 20kg
Refrigerant Pipe Refrigerant Pipe

TiMnoysRt oSommall Room

(VVeenntitlialatitoinon MMoouuthth) )

Outdoor Unit OuOtudtodooror
Indoor Unit IndInodoor or

Small Room

Medium Room The Room

Large Room

mechanical ventilation devicesrefrigerant leakage detector alarms devices
(Note(11) )Whetherit is alarge room,mediumroom, smallroom, tinyroom2t0hkegamount of (Note(22)le)Tahkeagroeormefrmiguesrat nntoatreexcaelle2d0kthges.lim0.i3tskrge/frmig3erant concentration of 0.42kg / m3.

Outdoor Unit OutdMooordUenl it
Model

Cooling Capacity R410A

RAM-280FSPH(D)

4.11Ton

RAM-335FSPH(D) 4.11 Ton

New refrigerant R410A product notes: Since R410A is a non-azeotropic refrigerant, when refrigerant leakage, the refrigerant will result in weight percent composition changes, so can not directly add refrigerant treatment, must be re-processing system.
5.6 Caution of Measure Pressure Data from The Check Joints
Measure pressure data of work, please from the check joints of gas line stop valve (right figure ) and the check joints of piping line (right figure ) to connect. And then, please according to the different operation state, to change high and low pressure position of the connection. The details, please refer to the following description of the table.

The check joints of gas line stop valve

Cooling Low pressure

The check joints of piping line

High pressure

The check joints of liquid line When vacuum, maintenance services

stop valve

use to charge the refrigerant specially.

16

5.7 Refrigerant Recovery Methods
When the unit must be moved and outdoors refrigerant must be recovered, please follow these steps to implement the operation. 1) Please close the gas line stop valve, liquid line stop valve and the mani-fold
gauge. 2) Please turn on the power source. 3) Setting to ON of outdoor unit electrical board DSW1-1, please implement cooling
operation, then closed the liquid line stop valve, and refrigerant recovered operation will be started. 4) When the low-pressure (gas line stop valve) side of the pressure display 0.01MPa (-100mmHg), please action rapidly according the following instructions
1.Please close the gas line stop valve. 2. Setting to OFF of outdoor unit electrical board DSW1-1. (Unit stop). 5) Please turn off the power source.

DIP Switch (DSW1-1 Setting To ON)

Liquid Stop Valve

Mani-Fold Gauge

Gas Stop Valve

Please do not let low-pressure gauge to measure the pressure is lower than-0.01MPa.

When the refrigerant recovered operation, the low pressure is less than-0.01MPa, will result in compressor Caution failure.

6. Electrical Wiring

CAUTIONAll the field wiring and electrical components must comply with local codes.

6.1 Wiring Capacity

1. The indoor and outdoor unit transmission cable of the connection is a non- polar.

transmission cable (non-polar) Outdoor

Indoor

Indoor

2. The type of earth leakage breaker required for the ” high-speed type ” (active time less than 0.1 sec.), when to buy, please pay

special attention. 3) Around the unit installed over current breaker, the manual switch and earth leakage breaker (ELB) should be separated, but need
set up it together.

4. Outdoor unit power supply specification for the 3230V / 380V 60Hz

5. Wiring capacity, please according to the following table.

Item Model

Power Supply
3 60Hz

Maximum Current
(A)

ELB (Earth Leakage Breaker)

Power Switch

Number of Poles

Rating Sensitivity Current (mA)

Rating Current
(A)
1

Switch Capacity
(A)
2

Fuse Capacity
(A)
2

Power Supply
Size

Earth Wire Size

(mm2) (mm2)

3

4

Transmission Cable Size
5

RAM-280FSPH

230V

37

3

RAM-335FSPH

2-Core Shielded

100

60

60

50

14

5.5

Twist Pair Cable

0.75mm2

RAM-280FSPHD

380V

23

4

RAM-335FSPHD

Total Length

30

40

40

25

8

3.5

1000m

Below

Note: When earth leakage breaker specification selection, please according to above table (Note: The earth leakage breaker of power supply 380V must use 34 wire)
Wiring Example

Piping thermal insulation material, Please use can withstand high temperature gas piping of the heat resistant specification products.
17

6.2 Wiring Essential The power source cord and transmission cable ,please according to the following essentials
to implement. 1) To prevent electric shock accidents, in the electrical wiring, maintenance and other operations before to open the services cover, please turn off power supply completely before implementation. 2) Be sure the indoor unit power supply connects with each indoor unit which are all same outdoor unit. And all indoor unit, please install the inverter corresponding type earth leakage breaker (ELB) and the manual switch. 3) The transmission cable of the connection must be sure to connect the wiring with the same refrigerant cycle system of the unit. (On the outdoor unit, the refrigerant piping is connected to the indoor unit, its transmission cable is also sure to connect the same indoor unit.) Refrigerant piping and the transmission cable if connected with a different refrigeration cycle, there will be abnormal operation occurred. 4) The transmission cable of indoor and outdoor unit and the transmission cable of the connection between indoor units (DC5V), use 2-core shielded twist pair cable (0.75mm2 above). At the same time, the total length must be at 1000m below. 5) The transmission cable of the connection, use 2 core wire. (Do not use more than the 3-core wire.)
6) Does Power supply voltage match the rating voltage within±10% Due to higher or lower voltage, the unit will be damaged. 7) Check the capacity of the electrical wires. If the power source capacity is too low, the system cannot be started due to the voltage
drop. 8) Indoor and outdoor unit is not grounded, electric shock and other accidents may be occurred, be sure to implement grounding
fortifications. The grounding must use the grounding resistance 100 or less of three kinds of grounding fortification, make construction by qualified electrical personnel. 9) To prevent electric shock accidents, in the electrical wiring, maintenance and other operations before to open the services cover, please turn off power supply completely before implementation. Caution of indoor and outdoor unit connection wiring construction The transmission cable of indoor and outdoor unit and the 220V power source cord, be sure to keep the distance of more than 5 ~ 6cm. Therefore, do not use the coaxial cable. If the transmission cable and power source cord connecting wrong, will cause the PCB of the outdoor unit burning, please pay special attention. 10) Indoor and outdoor unit’s power source cord and connection wiring methods:
18

11. Wiring connection port After wiring, must be implemented sealing to prevent water invasion inside the metal conduit pipe.

Make sure the distance between the terminal plugs, terminal plugs shall be attached the insulation tape or insulation sleeve.

Insulation Tape or Insulation Sleeve.

Rear Cover
Earth Wiring

Cord Band Operation 1. When wire through the cord band
appropriately tighten it, as show below. 2. Make sure the cord with high and low pressure sensor isolation. 3. Tighten the cord to be isolated with pipe, compressors, other components and metal plate edge.
Fold the wire and reserve for a maintenance operation the desired length. Prevent need to remove the wiring plug for maintenance.

Caution
When using shielded wiring, metal band must be fixed at the shielded coating surface.
Press the metal band by pincher, after inserting the shielded wire to metal band.

Earth Wiring Transmission Line
Shielded Wiring Metal Band Tighten the metal band with screws below the terminal.
Core (MVVS or CVVS)

Caution
Using the metal conduit pipe, do not let the metal conduit pipe inside the outdoor unit, once inserted into the unit, due to fear of touching the compressor or piping causing damage.

Piping Cover

Power Source Line

Metal Conduit Pipe

7. Dip Switch (DSW) Setting of Outdoor Unit
TURN OFF all power sources before setting. Without turning OFF, the switches do not work, and the contents of the setting are invalid. ( indicates the position of dip switches.)

1. Transmission method setting More than one outdoor unit share the same transmission line, need to set refrigerant cycle number and end terminal resistance.
   Setting of refrigerant cycle number

(Tens Digit)

Ref. Cycle NO. Setting

(Last Digit)

Alignment

position

Flat blade

screwdriver

ExampleRef. Cycle NO.25
Pin.2 Setting at the ON’ Rotation to5′

Setting of end terminal resistance DSW5

Before leaving the factory

Cancellation of end resistance

Outdoor Unit Indoor Unit

DSW4 DSW5

RSW1 RSW2

Setting of end terminal resistance (PCB of outdoor unit)
The unit before leaving the factory, No. 1 pin of DSW 5 is set at the “ON” side. In the case that the outdoor unit’s quantity in the same H-link is 2 or more, set No. 1 pin of DSW 5 at the “OFF” side from the 2nd unit. If only one outdoor unit is used, no setting is required.

19

2)Lift difference setting
Setting the lift difference between the outdoor unit and indoor unit. Please use the DIP switch (DSW6) of the outdoor unit PCB (PCB1), setting each function according to the following table.

Function Dip Switch

Outdoor unit lower than indoor unit 20~30m

Outside of the left item

DSW6

Before leaving the factory

Outdoor Unit

Outdoor unit higher than indoor unit

Outdoor Unit

NO.0

NO.1

NO.2

3. Others setting switch ( indicates the position of dip switches.)

Outdoor unit lower than indoor unit

20

8. Test Run
Before Test Run
Before test run, please re-confirm the installation whether there are problems, also confirm the following points.
In addition, please confirm it with the outdoor unit attached the installation manual.

1. Refrigerant piping and the transmission cable if connected with a different refrigeration cycle, there will be abnormal operation occurred.
2. Please use the 500V electrical resistance tester to confirm the electrical parts between terminals and earth electrical resistance must be 1M more than. If 1M or less, that poor the electrical insulation, please do not operation the unit. (Do not input the power source to the terminal No.1,2 of transmission wiring.)
3. When power source wiring phase error, the unit can not be operated, and the remote controller display alarm code 05 . Currently, please refer to the electrical box caution nameplate, check the phase of the first side and replace it. The phase of the replacement work, please process under the power source turn off.
4. Does the oil heater of the outdoor unit have been powered? (Before using, please input power source more than 12 hours.)
   Test Run
   When installation is completed, perform test run according to the following procedure, and make sure that whether the abnormal operation, then hand over the system to the customer. 1) Outdoor unit the gas stop valve and the liquid stop valve, make sure full open state. 2) Please implement the test run of the indoor unit in turn, confirm the refrigerant cycle system and the electrical wiring system is the same. (While more than one indoor unit operation, the system is unable to confirm the consistency.) 3) Please according to the following procedure to test run, and make sure that whether the abnormal operation. 3.1 Depress the “MODE” and the “CHECK” switches together for more than 3 seconds. The “TEST RUN” and the counting number of the connected units are indicated on the remote control switch. When cooling operation test run, it should be at room temperature DB 21 , WB 15 , outside air temperature DB -5 or more.(Outside air temperature DB -5 below, air conditioner can not be operated.) Using a remote controller to operation more than one indoor unit, please confirm whether the number of the units display. If no indication appears or the number of the units indicated is smaller than the actual number of the units, some abnormalities exist, please confirm it again. Depress the “MODE” switch again to set the desired mode of operation. 3.2 Depress “RUN/STOP” switch. The “TEST RUN” operation will be started. (The 2 hours OFF- TIMER will be set, and the “TEST RUN” operation will be finished after 2 hours unit operation or by depressing the “RUN/STOP” switch again.) 3.3 To end the test run, wait for 2 hours or push “RUN/STOP” switch again.

Number of The Unit

0

1

2

3

4

…

10

11

…

63

01 02 03 04 05 … 11 12 … 64 Timer Setting
Display Left Two Digit

Ref. Cycle NO.

0

1

2

3

4

…

10

11

…

63

01 02 03 04 05 … 11 12 … 64 Timer Setting
Display Right Two Digit

NoteAfter the product stops operation, in order to recover the piping refrigerant to the outdoor unit, the compressor continues to operate a period of time (most about 10 minutes). Also, when the test run, it is not the product failure or abnormal.
When test running, the protection device will be activated for some abnormality, the controller’s operation indicator is still blinking, display “Alarm” (abnormality), while the setting temperature display will show alarm code.
Setting temperature and setting timer display changes:

Setting Timer Display

Setting Temperature Display

23

Abnormality

Occurred Setting Temperature

01 01

01

(Display in sequence)

Abnormality Indoor Unit No.
F

Unit Type (Unit Code)

Abnormality Indoor Content of Abnormality

Unit Refrigerant

(Alarm Code)

Cycle

01

Total Number of Indoor Units Are the Same Refrigerant System with

The Abnormal Indoor Unit.

At this time, please refer to page 22 of the alarm code to confirm the leading cause and treatment. If you can not handle, please contact your contractor for assistance.
21

Alarm Code

Code Distinction

Content of Abnormality

Leading Cause

01 Indoor Unit

Indoor Unit Activation of Protection Device (Float Activation of Float Switch (High water Level Drain Pan, Abnormality of

Switch)

Drainpipe, Float Switch or Drain Pan)

02 Outdoor Unit Outdoor Unit Activation of Protection Device

Activation of High Pressure Switch (4.15MPa); Air Conditioner Outdoor Unit Fan Motor Lock.

03 Wiring

Transmission Abnormality between Indoor and Incorrect Wiring, Loose Terminals, Disconnect Wire, Blowout of Fuse,

Outdoor

Outdoor Unit Power OFF.

04 Inverter 05 Wiring

Transmission Abnormality between Inverter PCB and Outdoor PCB

Inverter PCB – Outdoor PCB Transmission Failure (Loose Connector, Wire Breaking, Blowout of Fuse), Abnormal fan motor controller transmitted, “04” the lower right will be “Signal flashing”.

Abnormality Power Source Phases

Incorrect Power Source Phases, Connection to Reversed Phases, Open-Phases.

06 Voltage

Abnormality Inverter Voltage

Outdoor Voltage Drop, Insufficient Power Capacity.

07

Decrease in Discharge Gas Superheat

Refrigerant

Cycle System

08

Increase in Discharge Gas Temperature

Excessive Refrigerant Charge, Failure of Thermistor, Incorrect Wiring, Incorrect Piping Connection, Expansion Valve Locking at Opened Position (Disconnect Connector).
Insufficient Refrigerant Charge, Pipe Clogging, Failure of Thermistor, Incorrect Wiring, Incorrect Piping Connection, Expansion Valve Locking at Closed Position (Disconnect Connector).

11

Abnormality Inlet Air Thermistor (Indoor)

Incorrect Wiring, Disconnecting Wiring, Breaking Wire, Short Circuit.

12 13 Indoor Unit
Thermistor 14

Abnormality Outlet Air Thermistor (Indoor)
Abnormality Freeze Protection Thermistor (Indoor)
Abnormality Gas Piping Thermistor (Indoor)

Incorrect Wiring, Disconnecting Wiring, Breaking Wire, Short Circuit. Incorrect Wiring, Disconnecting Wiring, Breaking Wire, Short Circuit. Incorrect Wiring, Disconnecting Wiring, Breaking Wire, Short Circuit.

19

Activation of Protection for Indoor Fan Motor

Fan Motor Overheat, Locking.

21

Abnormality High Pressure Thermistor (Outdoor)

22

23

Outdoor Unit Thermistor

24

29

Abnormality Outdoor Air Thermistor

Abnormality Discharge Pipe Thermistor (Outdoor)
Abnormality Heat Exchanger Liquid Pipe Thermistor (Outdoor)

Thermistor Incorrect Wiring, Disconnecting Wiring, Breaking Wire, Short Circuit.

Abnormality Low Pressure Thermistor (Outdoor)

31 System
35

Incorrect Capacity Setting of Outdoor and Indoor Incorrect Capacity Code Setting of Combination; Excessive or

Unit

Insufficient Indoor Unit Total Capacity Code (outside of 80~120%)

Incorrect Setting of Indoor Unit No.

Duplication of Indoor Unit No. In Same Ref. Gr., or The Connection Unit Number Exceeds the Maximum Number of Combination.

38 Outdoor Unit

Abnormality of Picking Up Circuit for Protection Failure of Protection Detecting Device (Incorrect Wiring of Outdoor

(Outdoor)

PCB)

43

Activation of Low Pressure Decrease Protection Defective Compressor (Failure of Compressor of Inverter, Loose

Device

Power Supply Connection)

44 Pressure
45

Activation of Low Pressure Increase Protection Device
Activation of High Pressure Increase Protection Device

Overload at Cooling, High Temperature at Expansion Valve Locking (Loose Connector)
Overload Operation (Clogging, Short-Pass), Pipe Clogging, Excessive Refrigerant, Inert Gas Mixing.

47

Activation of Low Pressure Decrease Protection Insufficient Refrigerant, Pipe Clogging, Expansion Valve Locking at

Device (Vacuum Operation Protection)

Open Position (Loose Connector).

48 Outdoor Unit

Activation of Inverter Overcurrent Protection Device

Overload Operation, Compressor Failure.

51
53 Inverter
54
55

Abnormality Inverter Current Sensor IPM Protection Activation Activation of Inverter Fin Thermistor Protection Inverter Failure

Current Sensor Failure.
Driver IC Error Signal Detection (Protection for Overcurrent, Low Voltage) Abnormality Fin Thermistor, Heat Exchanger Clogging, Fan Motor Failure.
Inverter PCB Failure

57 Outdoor Unit Activation of Outdoor Fan Controller Protection Abnormality Fan Controller Protection (Overcurrent), Fin Overheat

EE Compressor
b1 Wiring
b5

Compressor Protection Alarm Incorrect Outdoor Unit Address Number or Unit Number Setting
Number of Indoor Units Connected Error.

Compressor Occurred Three Times of Abnormality within 6 Hour. Over 64 Number Is Set for Address or Refrigerant Cycle. Connection of Non-H-LINK- Indoor Unit More Than 17 Units.

PSRemote control operation indicator flashes once every 2 seconds, the symbol of between the indoor unit and remote control for the
transmission abnormally (connector loss, loose, incorrect wiring, and disconnection). 4) Finally, please deliver the guarantee, operation manual, and installation manual, etc. to the customer to keep it.

DangerBefore the preparation of test running, please do not start running, be sure implementation to confirm the electrical wiring, etc.
22

Test Run and Maintenance Record

MODEL:

SERIAL. No.

CUSTOMER’S NAME AND ADDRESS:

COMPRESSOR MFG. No. DATE:

1. Is the rotation direction of the indoor coil fan correct?

2. Is the rotation direction of the outdoor coil fan correct?

3. Are there any abnormal compressor sounds?

4. Has the unit been operated at least twenty (20) minutes?

5. Check Room Temperature

Inlet: No. 1 DB /WB , No. 2 DB /WB , No. 3 DB /WB , No. 4 DB /WB ,

Outlet:

DB /WB ,

DB /WB ,

DB /WB ,

DB /WB ,

Inlet: No. 5 DB /WB , No. 6 DB /WB , No. 7 DB /WB , No. 8 DB /WB ,

Outlet:

DB /WB ,

DB /WB ,

DB /WB ,

DB /WB ,

6. Check Outdoor Ambient Temperature

Inlet: DB

, WB

Outlet: DB

, WB

7. Check Refrigerant Temperature: Operating Mode (Cool)

Discharge Gas Temperature:

Td=

Liquid Pipe Temperature:

Te=

8. Check Pressure

Discharge Pressure:

Pd=

Suction Pressure:

Ps=

MPa MPa

9. Check Voltage

Rated Voltage:

V

Operating Voltage:

L1-L2

V L1-L3

V L2-L3

V

Starting Voltage:

V

Phase Imbalance:

1-

V Vm

=

10. Check Compressor Input Running Current

Input:

kW

Running Current: A

A

11. Is the refrigerant charge adequate?

12. Do the operation control devices operate correctly?

13. Do the safety devices operate correctly?

14. Has the unit been checked for refrigerant leakage?

15. Is the unit clean inside and outside?

16. Are all cabinet panels fixed?

17. Are all cabinet panels free from rattles?

18. Is the filter clean?

19. Is the heat exchanger clean?

20. Are the stop valves open?

21. Does the drain water flow smoothly from the drain pipe?

23

66MP1570-A2
Printed in Philippines
24

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