MITSUBISHI RC-EX3D Refrigerant Leak Detector Instruction Manual

Instruction Manual for MITSUBISHI models including: RC-EX3D Refrigerant Leak Detector, RC-EX3D, Refrigerant Leak Detector, Leak Detector, Detector

REFRIGERANT LEAK DETECTOR

il y a 6 jours — Refer to the installation manual of the remote control (RC-EX3D or later) for detailed setting instructions. [Ceiling mounted type 1] FDT,FDTC,FDTW,FDTS,FDTQ.

High

Air-conditioner User's Manual | MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD.

File Info : application/pdf, 22 Pages, 6.14MB

pjz012d148 english

English is original
REFRIGERANT LEAK DETECTOR
INSTALLATION MANUAL
Installation manual ENGLISH Installationsanleitung DEUTSCH Manuel d'installation FRANÇAIS Manual de instalación ESPAÑOL Manuale di installazione ITALIANO Installatiehandleiding NEDERLANDS
Kurulum kilavuzu TÜRKÇE Manual de instalação PORTUGUÊS Podre cznik instalacji POLSKI

This product complies with following directives/regulations

MD LVD EMC RoHS Ecodesign

2006 / 42 / EC 2014 / 35 / EU 2014 / 30 / EU 2011 / 65 / EU 2009 / 125 / EC

SMR S.I. 2008 / 1597

EER S.I.

2016 / 1101

EMC S.I. 2016 / 1091

RoHS S.I. 2012 / 3032

Ecodesign S.I. 2020 / 1528

CE and UKCA marking is applicable to the area of 50 Hz power supply

Questo condizionatore è

conforme alle seguenti norme:

Macchine 2006 / 42 / EC

Bassa tensione 2014 / 35 / EU

EMC

2014 / 30 / EU

RoHS

2011 / 65 / EU

Ecoprogettazione

2009 / 125 / EC

La marcatura CE è applicabile

all'area di alimentazione

elettrica di 50Hz.

Bu klima aaidaki yönerge ile

uyumludur.

Makine

2006 / 42 / EC

Alçak gerilim 2014 / 35 / EU

EMC

2014 / 30 / EU

RoHS

2011 / 65 / EU

Çevreci tasarim 2009 / 125 / EC

CE 50Hz güç kaynainin alani

için de geçerlidir.

Este ar condicionado respeita

as seguintes directivas.

Maquinário 2006 / 42 / EC

Baixa Voltagem 2014 / 35 / EU

EMC

2014 / 30 / EU

RoHS

2011 / 65 / EU

Ecodesign 2009 / 125 / EC

Tomada CE é aplicável a área

da fonte de alimentação 50Hz.

Ce climatiseur est conforme

aux directives suivantes :

Machinerie 2006 / 42 / EC

Basse tension 2014 / 35 / EU

EMC

2014 / 30 / EU

RoHS

2011 / 65 / EU

Conception écologique

2009 / 125 / EC

Le marquage CE est applicable

dans les zones d'alimentation

électrique de 50 Hz.

Este aire acondicionado cumple

con las siguientes directrices.

Maquinaria 2006 / 42 / EC

Bajo voltaje 2014 / 35 / EU

EMC

2014 / 30 / EU

RoHS

2011 / 65 / EU

Ecodiseño 2009 / 125 / EC

La marca CE corresponde al

área de suministro de energía

de 50 Hz.

Deze airconditioner voldoet aan

de volgende richtlijn.

Machinerie 2006 / 42 / EC

Lage spanning 2014 / 35 / EU

EMC

2014 / 30 / EU

RoHS

2011 / 65 / EU

Ecodesign 2009 / 125 / EC

CE-markering is van toepassing

op het gebied met een

netstroom van 50 Hz.

Diese Klimaanlage entspricht

den folgenden Richtlinien.

Maschinen 2006 / 42 / EC

Niederspannung 2014 / 35 / EU

EMC

2014 / 30 / EU

RoHS

2011 / 65 / EU

Ecodesign 2009 / 125 / EC

CE Herstellung ist in Bereich

mit 50 Hz Stromversorgung

anwendbar.

Ten klimatyzator spelnia

wymogi niej wymienionej

dyrektywy.

Maszynowa 2006 / 42 / EC

Niskonapiciowa

2014 / 35 / EU

EMC

2014 / 30 / EU

RoHS

2011 / 65 / EU

Dot. ekoprojektu

2009 / 125 / EC

Znakowanie CE ma

zastosowanie do obszaru prdu

zasilajcego 50 Hz

PJZ012D148 A 202309

REFRIGERANT LEAK DETECTOR INSTALLATION MANUAL
This manual describes the way of installing the refrigerant leak detector (hereinafter referred to as the detector). The leak detector is a safety measure equipment required to install on the MHI R32 VRF system. When the detector is necessary, install it according to this manual. Use it together with installation manuals attached to the indoor unit, remote controller, outdoor unit and shut-off valve.

Contents

General requirement .......................................... 2 1 . Safety precautions ....................................... 2 2 . Accessories ................................................ 4 3 . Place to install refrigerant leak detector ......... 5 4 . Installation of refrigerant leak detector ......... 8 5 . Wire connection to indoor unit .................. 10 6 . Settings of refrigerant leak detector ............ 10 7 . Check the connection of safety equipment ... 13 8 . Refrigerant sensor replacement.................. 14 9 . I/F PCB replacement (Save, transfer of accumulated refrigerant sensor operation hours) 15
10 . Other ...................................................... 16

-1-

Regarding safety measure equipment of air-conditioners (refrigerant leak detector) for MHI R32 VRF system

MHI R32 VRF system uses R32 refrigerant. R32 refrigerant is categorized as mildly flammable (A2L) by International Standard ISO817. Safety measures specified in safety standard IEC60335-2-40 Ed.6.0. must be observed when installing or using R32 refrigerant equipment. Always install it whenever it is judged necessary to install safety measure equipment. It is very dangerous if a refrigerant leak happens by accident when the air-conditioner is used without installation of safety measure equipment (including a detector). It can lead to an explosion if the leak is not detected in the place where an ignition source exists. The detector contains sensor to detect refrigerant in air. If refrigerant leaks, the detector will inform it to outdoor and indoor units, and other safety measure equipment. The alarm will then be turned on and the operation of each equipment will be controlled for keeping the concentration of refrigerant leaked in the room under the hazard level.
1. Safety precautions

Read this "Safety precautions" carefully before starting work to install the equipment correctly. Always observe each precaution because it describes important contents for safety.\

WARNING

It is highly possible to lead to a significant result such as death or serious injury if it is handled incorrectly.

CAUTION It is possible to get hurt or cause physical damage.

It could result in significant result depending on situation "Pictograph" used in the text means as follows.

Strictly prohibited.

Always practice as instructed.

User is required to keep it safety where it could be consulted any time. Give it to construction workers when equipment is relocated or repaired. When users are changed, give it to new user.

WARNING
Consult your dealer or a professional contractor to install the unit. Improper installation made on your own may cause electric shocks, fire or dropping of the unit.
Installation work should be performed properly according to this installation manual. Improper installation work may result in electric shocks, fire or break-down.
Be sure to use accessories and specified parts for installation work. Use of unspecified parts may result in drop, fire or electric shocks.
Install the unit properly to a place with sufficient strength to hold the weight. If the place is not strong enough, the unit may drop and cause injury.
Be sure to have the electrical wiring work done by qualified electrical installer, and use exclusive circuit. Power source with insufficient and improper work can cause electric shock and fire.

-2-

WARNING
Shut OFF the main power supply before starting electrical work. Otherwise, it could result in electric shocks, break-down or malfunction.
Do not modify the unit. It could cause electric shocks, fire, or break-down.
Be sure to turn OFF the power circuit breaker before repairing/inspecting the unit. Repairing/inspecting the unit with the power circuit breaker turned ON could cause electric shocks or injury.
Do not install the unit in appropriate environment or where inflammable gas could generate, flow in, accumulate or leak. If the unit is used at places where air contains dense oil mist, steam, organic solvent vapor, corrosive gas (ammonium, sulfuric compound, acid, etc.) or where acidic or alkaline solution, special spray, etc. are used, it could cause electric shocks, break-down, smoke or fire as a result of significant deterioration of its performance or corrosion.
Do not install the unit where water vapor is generated excessively or condensation occurs. It could cause electric shocks, fire, or break-down.
Do not use the unit in a place where it gets wet, such as laundry room. It could cause electric shocks, fire, or break-down.
Do not operate the unit with wet hands. It could cause electric shocks.
Do not wash the unit with water. It could cause electric shocks, fire, or break-down.
Use the specified cables for wiring, and connect them securely with care to protect electronic parts from external forces. Improper connections or fixing could cause heat generation, fire, etc.
Seal the inlet hole for remote control cable with putty. If dew, water, insect, etc. enters through the hole, it could cause electric shocks, fire or break-down. If dew or water enters the unit, it may cause screen display anomalies.
When installing the unit at a hospital, telecommunication facility, etc., take measures to suppress electric noises. It could cause malfunction or break-down due to hazardous effects on the inverter, private power generator, high frequency medical equipment, radio communication equipment, etc. The influences transmitted from the remote control to medical or communication equipment could disrupt medical activities, video broadcasting or cause noise interference.
Do not leave the refrigerant leak detector with its upper case removed. If dew, water, insect, etc. enters through the hole, it could cause electric shocks, fire or break-down.
-3-

CAUTION
Do not install the detector at following places. (1) It could cause break-down or deformation of detector. · Where it is exposed to direct sunlight · Where the ambient temperature becomes 0 °C or below, or 40 °C or above · Where the surface is not flat · Where the strength of installation area is insufficient (2) Moisture may be attached to internal parts of the detector, resulting in a display failure. · Place with high humidity where condensation occurs on the detector · Where the detector gets wet (3) Accurate room temperature may not be detected using the temperature sensor of the detector. · Where the average room temperature cannot be detected · Place near the equipment to generate heat · Place affected by outside air in opening/closing the door · Place exposed to direct sunlight or wind from air conditioner · Where the difference between wall and room temperature is large

2. Accessories

Following parts are provided.

Detector

Wood screw

Installation manual (This Manual)

User's manual

1 piece

2 pieces

1 piece

Following parts are arranged at site. Prepare them according to the respective installation procedures.

Item name

Q'ty

Remark

European standard junction box Lacing (JIS C8425 or equivalent)

1 As required

This is not required when installing directly on a wall. If not embedding the box in a wall, it shall be insulating material of at least 1mm thick for supplementary insulation.
Necessary to run R/C cable on the wall. It shall be insulating material of at least 1mm thick for supplementary insulation.

Putty

Suitably For sealing gaps

Molly anchor

As required

R/C cable (0.3 mm2 x 2 pcs)

As required

See right table when longer than 100 m

When the cable length is longer than 100 m, the max size for wires used in the detector case is 0.5 mm2. Connect
them to wires of larger size near the outside of detector. When wires are
connected, take measures to prevent
water, etc. from entering inside.

200 m 300m 400m 600m

0.5 mm2 x 2-core 0.75 mm2 x 2-core 1.25 mm2 x 2-core 2.0 mm2 x 2-core

-4-

3. Place to install refrigerant leak detector
Install the detector following instructions here.
Place where refrigerant leak can happen The following places are specified by IEC60335-2-40 Ed.6.0. as the spots with high risks of refrigerant leak. A refrigerant system in which a single rupture of the refrigerant circuit results in a refrigerant release to a space, irrespective of the location of the refrigerant circuit. (Direct system) Blow outlet, suction inlet of indoor unit. Piping joints other than site-made joints directly connecting the indoor unit to the refrigerant piping or factory made mechanical joints in compliance with ISO 14903.
Installation place Ensure to meet all the required conditions for setting detectors (shown below). The same conditions are required in the case of mechanical joints which are not meeting the standards of ISO14903 and exposed in the room. In this case, refer to `mechanical joint' instead of `indoor unit'. The refrigerant detection part is within 300 mm above floor (make the height of top face of detector not higher than 420 mm from the floor surface). Horizontal distance from the center of the indoor unit is less than 10 m. If there is any obstacle such as partition between the indoor unit and the detector, the horizontal distance from the center of the indoor unit must be within 7 m. * Address setting of main IU is required when one detector is shared among multiple indoor units. Refer to the installation manual of the remote control (RC-EX3D or later) for detailed setting instructions.
[Ceiling mounted type 1] FDT,FDTC,FDTW,FDTS,FDTQ

Indoor Unit 10
Refrigerant leak detector Refrigerant detection part
420mm 300mm
Standard (Side view)

Indoor Unit

7
Refrigerant detection part

Refrigerant leak detector

Obstacles

420mm 300mm
With Obstacles (Side view)

10m (or 7m) 10m (or 7m) 10m (or 7m)

Indoor Unit

Refrigerant leak detector
Indoor Unit

Indoor units (Top view)

Refrigerant leak detector

Indoor Unit

Refrigerant leak detector

Indoor Unit

Each over 10m Indoor units (Top view)

-5-

[Ceiling mounted type 2/Wall mounted type] FDE,FDK

Indoor unit Indoor unit

10
Refrigerant detection part

Refrigerant leak detector

420mm 300mm
Standard (Side view)

Refrigerant leak detector

10m (or 7m)

Indoor unit
Indoor units (Top view)

Indoor unit

Indoor

unit

Obstacles

7m
Refrigerant detection part

Refrigerant leak detector

420mm 300mm

With Obstacles (Side view)

Refrigerant leak detector

10m (or 7m) 10m (or 7m)

Indoor unit
Refrigerant leak detector
Each over 10m Indoor units (Top view)

Indoor unit

[With Floor standing type] Floor standing type : FDFW,FDFL,FDFU
Floor standing type has refrigerant leak detector inside the unit. Where a floor standing indoor unit and an indoor unit other than that are installed in the same room, exclude the detector which is built in the floor standing indoor unit and install another detector.

Detector isn't required for Floor standing type.

10m (or 7m)

Refrigerant leak detector

10m (or 7m)

Other

Floor standing indoor unit

Other
Floor standing type and Others are 10m (or 7m) or less (Top view)

Other
Refrigerant leak detector

(or 7m) 10m

Refrigerant leak detector Floor standing indoor unit
Other

Each over 10m Indoor units (Top view)

-6-

[Duct connected type] FDU,FDUM,FDUT,FDUH,FDU-F

Duct

Indoor Unit

Duct

10m (or 7m)
Refrigerant detection part

10m (or 7m) 10m (or 7m)
Refrigerant leak detector

10m (or 7m)
Refrigerant detection part

420mm 300mm

Each Inlet/Outlet are over 10m (or 7m) with Ceiling (Side view)

It is possible only with Detector(A).

10m (or 7m)

(A) Refrigerant leak detector (1)

Indoor Unit

(2)

Duct

Duct (3)

Each Inlet/Outlet are 10m(or 7m) or less (Top view)

Indoor Unit is also 10m (or 7m) or less

Detector(B) is also required. (Detector(A) and (B) must be installed.)

10m (or 7m)

(1)

Indoor Unit

Duct

Refrigerant leak detector

(2)

(B)

Over 10m

(3)

Inlet/Outlet (2)(3) are over 10m(or 7m) (Top view)

Duct

Indoor Unit

Duct

10m (or 7m)

10m (or 7m)
Refrigerant detection part

10m (or 7m)

Refrigerant leak detector

420mm 300mm

10m (or 7m) Refrigerant detection part
420mm 300mm

Indoor Unit and Each Inlet/Outlet are over 10m (or 7m) without Ceiling (Side view)

-7-

4. Installation of refrigerant leak detector

Always fix the refrigerant leak detector on a flat surface of object. Secure the installation space shown in the figure. For the installation method, "Embedding wiring" or "exposing wiring" can be selected. For the wiring direction, "Backward", "Upper" or "Lower" can be selected. Determine the installation place in consideration of the installation method and wiring direction.

30mm

Wiring

150mm
Temperature sensor
30mm

150mm 420mm Wiring

Perform installation and wiring work for the refrigerant leak detector according to the following procedure.

Secure minimum spaces for disassembling the case. Left/Right side...150mm or more If using L-shaped screwdriver, 50mm or more is available.

Dimensions (Viewed from front)

Operation light (Green)

XY terminal

Error light (Red)

Switch

I/F PCB

Dip SW1 Dip SW2

159

83.5

Protective

Alarm

sheet

420 82.5

100

Part to detect

Refrigerant sensor PCB

Temperature sensor

To disassemble the refrigerant leak detector case into the upper and lower pieces after assembling them once

Insert the tip of flat head screwdriver or the like in the recess (Both side) at the lower part of the refrigerant leak detector and twist it lightly to remove.
It is recommended that the tip of the screwdriver be wrapped with tape to avoid damaging the case.
Take care to protect the removed upper case from moisture or dust.

Both side

In case of Embedding wiring (When the wiring is retrieved "Backward")

1 Refer to the diagram for wiring end treatment. Embed the switch box and the wiring beforehand.Seal the inlet hole for the wiring with putty.
2 When the wiring are passed through the lower case, fix the lower case at 2 places on the switch box. 3 Connect the wiring from X and Y terminals of the refrigerant leak detector to X and Y terminals of indoor unit.
The wiring (X, Y) have no polarity. Fix the wiring such that the wiring will run around the terminal screws on the upper case of the refrigerant leak detector. 4 Install the upper case with care not to pinch the wiring.

Wall
Bushing 70
8 200

Conduit Locknut
Switch box
Seal with putty
Wiring

Wall Wire penetrating hole

Pass wires here.

-8-

Cautions for wire connection
Use wires of no larger than 0.5 mm2 for wiring running through the refrigerant leak detector case. Take care not to pinch the sheath. Tighten by hand (0.7 N·m or less) the wire connection. If the wire is connected using an electric driver, it may cause failure or deformation.

In case of Exposing wiring

(When the wiring is taken out from "Upper" or "Lower".)

1 Refer to the diagram for wiring end treatment.

2 Cut out the central thin wall sections on the upper case for the wiring.

Take care not to damage the PCB and not to leave any chips of cut thin wall

inside.

It is better to cut off easily if 2 sides (A) in vertical direction are cut with a

nipper and a line is dent with a cutter along one side (B) in horizontal

direction and the thinner wall section is folded inwards of case.

3 Fix the lower case on a flat surface with two wood screws.

4 Connect the wiring from X and Y terminals of the refrigerant leak detector to X and Y terminals of indoor unit. The wiring (X, Y) have no polarity. Fix the wiring such that the

2 sides in vertical direction (A)

1 side in lateral direction (B)

wiring will run around the terminal screws on the upper case of the refrigerant leak detector."

5 Route the wiring as shown in the diagram.

6 Install the upper case with care not to pinch the wiring.

7 Seal the area cut in with putty. Prevents foreign matter and moisture from entering.

8 Cover the wiring with the wiring cover. Prevents damage to the detector due to pulling on the wiring.

L2 L1 8

Upper Wall

Wire take-out direction Upper Lower

70mm 150mm

120mm 200mm

Pass wires here.

In case of "Upper"

Lower

Pass wires here. Wall
In case of "Lower"

Seal with putty Wiring

L2 L1 8

Upper case

Wiring
Wiring cover

In case of "Upper"

-9-

5. Wire connection to indoor unit

The refrigerant leak detector uses the remote control signals. Connect the wiring to X and Y terminals of the indoor unit. The wiring (X, Y) have no polarity. Refer to the installation manual of the indoor unit for connections with other types of units.

Indoor power source line Shut-off valve line
Earth
Power source side terminal block

Band

Signal side terminal block

Main fuse

Super link line
Refrigerant leak detector line Remote control line Band

6. Settings of refrigerant leak detector

In case of FDT

How to set by detector

The detector has two Dip SWs. Their functions are as follows. Set them as required. The function becomes valid when the power is turned from OFF to ON or CPU of detector is reset, after changing the Dip SW setting.

SW1-1 SW1-2 SW1-3 SW1- 4

Function Main-sub setting Main-sub setting
Inspection mode

OFF

Refer to the main-sub setting.

Valid

Invalid

The original factory state OFF OFF OFF OFF

SW2-1 SW2-2 SW2-3 SW2-4

Function Alarm sound stop function
Alarm function Leak detect function

ON Valid Valid Valid

OFF Invalid Invalid Invalid

The original factory state ON ON ON OFF

[Main-sub setting of detectors] Up to four detectors, along with the remote control, can be connected to one indoor unit. This setting is necessary for the following cases.

When the remote controller is not connected.
When two or more detectors are connected. This setting is not necessary when connecting 1 unit of remote controller and 1 unit of detector.
Set the Dip SW 1 (SW1-1, SW1-2) as shown in the following table.

SW1-2

ON OFF

ON Main Sub-A

SW1-1

OFF Sub-C Sub-B

Setting as Sub-B in the original factory state. When connecting two or more detectors, set them avoiding duplication. When the remote controller is not connected to the indoor unit on which the detector is connected, set it as the main (SW1-1: ON/
SW1-2: ON). If more than two units are connected, make sure to specify one unit as the main.

-10-

Indoor Unit

R/C RLD Main Sub-B

R/C RLD1 RLD2 Main Sub-B Sub-C

Indoor Unit

Detector that needs the setting (RLD: Detector)

R/C RLD1 RLD2 RLD3 Main Sub-B Sub-A Sub-C

R/C1 R/C2 RLD Main Sub-A Sub-B

R/C1 R/C2 RLD1 RLD2 Note: Main Sub-A Sub-B Sub-C Since R/C2 is Sub-A, make sure to set RLD2 as Sub-C.

Indoor Unit

RLD Main

RLD1 RLD2 Main Sub-B

RLD1 RLD2 RLD3 Main Sub-B Sub-A

RLD1 RLD2 RLD3 RLD4 Main Sub-B Sub-A Sub-C

[Setting detector functions] When the detector detects refrigerant leak, it turns on the alarm and Error light (Red) to notify the leak. By operating the Dip SWs, the following functions below can be configured.
<Function to stop the alarm (Dip SW2-1)> This function stops the alarm sound emitted during refrigerant leakage using the switch on the detector. This function is turned on in the original factory state (Dip SW2-1: ON). When this function is turned on (Dip SW2-1: ON), by pushing the switch once while the detector's alarm is sounding, the alarm sound will stop. Note that this will not stop the flashing of the Error light (red). To turned off the function to stop controlling the alarm sound by switch, Dip SW2-1 into OFF.
<Alarm function (Dip SW2-2)> This function triggers an alarm sound when refrigerant leakage occurs. The alarm sound level from the detector is approximately 65dB at a distance of 1 meter from the detector. This function is turned on in the original factory state (Dip SW2-2: ON). When other alarms are used for refrigerant leakage alarms, you can turn off the function that sounds an alarm. To turned off this function, Dip SW2-2 to OFF. When the alarm of this detector is turned off, other device to alert the user for refrigerant leak must be installed.
<Function to detect leak (Dip SW2-3)> This function detects refrigerant leakage. This function is turned on in the original factory state (Dip SW2-3: ON). When using other detectors for refrigerant leakage detection and using this detector solely as an audible alarming device, you can turn off the function to detect refrigerant leakage. To turned off this function, Dip SW2-3 to OFF. When the detection of this detector is turned off, other device to detect refrigerant leak must be installed.

-11-

How to set by remote controller
Each setting of the detector can be made by remote controller (RC-EX3D or later). The administrator password must be entered during setting. Tap the Menu button on the TOP screen and select User setting Administrator settings Refrigerant leak detector setting . The following screen displays of remote controller can change without any announcement. Please refer to the remote controller's manual for the latest information.

Menu Useful functions Energy-saving setting Filter User setting Service setting
Select the item.

Back

<Controller sound>
The level of alarm sound for refrigerant leak is adjustable. If you set it, the alarm will sound for 3 seconds in the selected sound.

Setting 1: The biggest sound. The setting selected in the original factory state.
Setting 2: The sound slightly smaller than Setting 1. Setting 3: The sound smaller than Setting 1.

<LED brightness> The brightness of Operation light (Green) that turns on in the detector's operation is adjustable.

Normal: 100% brightness. The setting selected in the original factory state.
Low 1: 75% brightness. Low 2: 50% brightness.

<Threshold for refrigerant density alarm> After detecting refrigerant leak, the alarm sound and the flash of Error light (Red) change to notify a decrease in the concentration. The concentration level to turn on the notifications is adjustable. The patterns of the alarm sound and Error light (Red) are as follows.

When refrigerant leak is detected When the concentration of refrigerant inside room decreases

Alarm sound Continuous Intermittent

Error light (Red) Continuous flash
5 flashes

Operation light (Green) OFF OFF

Intermittent sound: Synchronized with flash of Error light (Red).

High: The same level as the concentration when refrigerant leak is detected. The setting selected in the original factory state.
Normal: The level of concentration is between High and Low. Low: The level of concentration close to the lowest concentration
that the detector can sense.

-12-

7. Check the connection of safety equipment

After installing and connecting safety measure devices, including the detector, check if they are connected correctly. If it is incorrect, it cannot process safety measures correctly when a refrigerant leak is detected. After connecting safety measure equipment, make sure to check their connection. Unless connection is checked, we cannot take responsibility even if refrigerant leaks during operation without checking connection. After confirming that the outdoor units, indoor units, remote controllers, and safety devices (detectors, shut-off valves, ventilation systems, etc.) in the system are properly connected, proceed with the following steps. After doing, confirm that the indoor units and other safety devices are functioning properly. Refer to the respective instruction manuals for each device on how to confirm the device operation status.

No.

Operation

Check

Turn on the Dip SW2-3 (Dip SW2-3 is ON by the original Statuses of detector's alarm and light indicators 1 factory state).

* The detector does not work when Dip SW2-3 is not ON.

Alarm sound Operation (green) Error (red)

Stop

OFF

Set the outdoor unit to the safety equipment check mode. See the outdoor unit operation manual for setting details.

* This is the normal status.

Hold-down the detector's switch twice. Take three seconds

or longer for each time. (See the diagram below) See [Caution for switch operation (P. 16)] in (10) for details. · Statuses of detector's alarm and light indicators

* After the switch has been held-down twice, in about one

Alarm sound Operation (green) Error (red)

second, the detector sends the connection test signal, an alarm sound goes off, the Operation (green) turns off,

Continuous sound

Flash continuously

and the Error (red) starts to flash continuously.

3 sec. or longer

* If this status is not reached, it is possible that the detector is malfunctioning.
* This is different from the actual state when a

refrigerant leak is detected. The operation light

(green) turns off when an actual refrigerant leak

is detected.

OFF

Less than 1 sec.

Indoor Unit Indoor Unit Indoor Unit

RLD

R/C RLD R/C RLD

· Error code of the remote control connected to the indoor unit with the detector connected: "E23" is displayed. If "E23" is not displayed, there is a possibility of incorrect connection or settings. Check the connection and settings.

E23 display

Switch hold-down twice

BEurrzozre(rreOdN) f/lcaosnhtinuous

Statuses of detector's alarm and light indicators

Push the detector's switch once. The alarm sound will stop.

Alarm sound Stop

Operation (green) ON

Error (red)
Flash continuously

Push the detector's switch three times. The detector 5 sends a signal to return to the original mode, while the Statuses of detector's alarm and light indicators

Operation (green) lights up and the Error (red) turns off.

Alarm sound Operation (green) Error (red)

Cancel the safety equipment check mode for the

Stop

OFF

6 outdoor unit.

* This is the normal status.

See the outdoor unit operation manual for setting details.

-13-

8. Refrigerant sensor replacement

Replace the refrigerant sensor for detection of detector refrigerant 15 years after the start of use. It may not detect properly as a result of aging. Even if the air conditioner is not used, the leakage is monitored and the life is counted always while the power is supplied to the air-conditioner.

Notice of refrigerant sensor replacement

When it lapses 14 years and 6 months, it notifies it is near the replacement period. Then it notifies every month till it reaches 15 years. Report it to your dealer to prepare a new refrigerant sensor. If it reaches 15 years, the need of replacement is notified. This continues till it is replaced. Make sure to replace the refrigerant sensor.

Notification period

Detector
Remote controller (RC-EX3D or later)

Display

Display To stop display
TOP screen Error history display screen
Display stop

Pre-notice for replacement Every month between 14 years and 6 months and
14 years and 11 months Operation light (green), Error light (red) flash
3 times alternately Push detector switch once. "Refrigerant sensor replace time is coming."
"M52"
Refer to remote controller manual.

Notice for replacement
15 years
Operation light (green), Error light (red) flash alternately continuously. Replace refrigerant sensor
"Refrigerant sensor replace time has passed." "M51"
Refer to remote controller manual.

-14-

9. I/F PCB replacement (Save, transfer of accumulated refrigerant sensor operation hours)

When replacing I/F PCB for repair, it is necessary to transfer accumulated operation hours of refrigerant sensor. Accumulated operation hours is saved in I/F PCB. If I/F PCB is replaced, accumulated operation hours is turned to 0 so that replacement period of refrigerant sensor cannot be displayed correctly and specified replacement period could be exceeded. When replacing I/F PCB, make sure to transfer the accumulated operation hours of refrigerant sensor to new I/F PCB using the remote controller (RC-EX3D or later).

Save and transfer of accumulated refrigerant sensor operation hours

Save the accumulated operation hours of refrigerant sensor in remote controller (RC-EX3D or later) and transfer it to new I/F PCB. The service password must be entered during setting. Tap the Menu button on the TOP screen and select Service setting Service & Maintenance Safety system maintenance Refrigerant leak detector record setting . Specifications of following remote controller screen are subject to change without notice. For latest information, refer to the manual of remote controller.

Menu Useful functions Energy-saving setting Filter User setting Service setting
Select the item.

Back

[When saving accumulated operation hours in remote controller] Save it before replacing I/F PCB.
[When transferring accumulated operation hours saved in remote controller to I/F PCB] Transfer it after replacing I/F PCB.

-15-

I/F PCB replacement

When installing, removing or operating detector PCB, always turn off the power to the indoor unit.

If it is turn on, it could cause electric shock, trouble or improper operation.

1 Save accumulated operation hours of refrigerant sensor in remote controller.

2 Remove the upper case.

Take care to protect wire connection terminals from undue load. It could damage terminals or PCB.

3 Disconnect wire terminals (2 pcs.) and connector on the I/F PCB.

4 Remove I/F PCB fixing screws (3 pcs.) and take out I/F PCB from the upper case.

5 Install new I/F PCB on the upper case and fix it with screws (3 pcs.). Install also the protection sheet.

Screw

6 Connect wire terminals on I/F PCB and connector securely. Unless it is connected correctly, it cannot detect refrigerant leak.

I/F PCB

7 Install the upper case on the lower case.

Screw

8 Transfer the accumulated operation hours saved in remote

controller to new I/F PCB.

Protective

sheet

Connecter

Terminal Screw

10. Other

Switch operation

[Kinds of switch operation]

As the switch is operated, the detector operates accordingly. Switch operation and detector operation are as follows.

1 push
2 push 3 push 1 hold-down
2 hold-down
3 hold-down

Normal mode (Dip SW1-4: OFF)
Alarm stop Operation (green), Error (red)
flash stop
Alarm stop + Error (red) OFF

Connection check signal ON/OFF
Refrigerant leak detector CPU reset

Inspection mode (Dip SW1-4: ON)
Alarm stop Operation (green), Error (red)
flash stop
Alarm stop + Error (red) OFF Accumulated refrigerant sensor
operation hours reset

Refrigerant leak detector CPU reset

Remark At refrigerant leak detection Near to refrigerant sensor
replacement period
At refrigerant leak detection At refrigerant sensor replacement
At connection check for installation, inspection

[Caution for switch operation]
Unless the switch is operated as follows, it does neither recognize the switch operation nor operate as intended. Take care.
1 When it is pushed twice or three times, push interval less than 1 second. If it is longer than 1 second, it recognizes less than intended number of times.
2 When holding down, one hold-down needs to be 3 seconds or more. If one push of switch is less than 3 seconds, it is not recognized as a hold-down but as normal push.
3 After pushing the switch, the detector starts each operation when hand is released from the switch. If the switch is pushed continuously, the detector does not start each operation. Other devices than detector start operation 10 and few second after releasing hand from switch at the maximum. It depends on communication condition with each device.

-16-

Detector control list *1

No.

Control

Remote controller
display code

Major start conditions

Operation Error light

light (green)

(red)

Alarm

Switch 1 push

1 Normal

Power ON

OFF

Refrigerant sensor replacement notice

M52

Every month after using the detector for 14 years and 6 months

3 flash (alternate)

OFF

Light OFF

Refrigerant sensor replacement guide

M51

When the detector has been used for 15 years

Continuous flash
(alternate)

OFF

4 Leak detection

E23

When it exceeds the leak detect density.

OFF

Alarm flash

Alarm OFF

Leak density increase

When the density has become E23 approx. 4 times of detection
density.

OFF

Alarm flash

Leak density decrease

E23

When it drops below the density as set with the remote controller.

OFF

5 flash (simultaneous)

Error (red) simultaneous
ON

Alarm OFF

Buzzer sound volume setting

When the buzzer sound volume is Course of

set with the remote controller.

events

Course of events

3 seconds ON

Safety measure 8 equipment
connection check

E23 When it is held down twice.

Alarm flash

Alarm OFF

9 Inspection mode

When SW1-4 is ON

Alarm flash

Course of events

Accumulated 10 operation time
reset

When SW1-4 is ON and the switch is held down once.

Continuous flash

Course of events

Reset ON

No registration of 11 indoor unit at power
ON

When signal is not received for 10 6 flash

6 flash

minutes from indoor unit.

(simultaneous) (simultaneous)

OFF

Excessive number 12 of registered indoor
units

E10

When more than 17 indoor units

3 flash

are connected.

(simultaneous) (simultaneous)

OFF

Blown thermal sensor wire

E28

When the detection temperature

4 flash

drops below -50°C.

(simultaneous) (simultaneous)

OFF

Defective refrigerant sensor

When the output voltage of M11 refrigerant sensor is 2.53V or
more.

1 flash (Alternate)

Error (red) simultaneous Alarm OFF
ON

Refrigerant sensor disconnection

When the output voltage of M12 refrigerant sensor is less than
0.05V.

2 flash (Alternate)

Error (red) simultaneous Alarm OFF
ON

Communication error

M41

When it cannot communicate for

5 flash

2 minutes with indoor unit.

(simultaneous) (simultaneous)

OFF

17 Detector CPU reset

When it has been held down 3 times.

Reset flash Reset flash (simultaneous) (simultaneous)

Reset ON

Alarm dedicated control

When SW2-2 is turned ON, SW2-

3 is turned OFF and inputs are

OFF

Alarm flash

received from other device.

Alarm OFF

*1: Error code or maintenance code displayed on the remote controller

*2: Light flashes are as follows.

Alarm flash:

ON/OFF repeat 2 times per second.

Reset flash:

Continuous flash: ON/OFF once per second continues.

Simultaneous:

n flash:

ON/OFF once per second repeats n times. Alternate:

Short flash twice Operation (green) and Error (red) flash simultaneously. Operation (green) and Error (red) flash alternately.

*3: Alarm operations are as follows.

OFF:

Alarm stop

ON:

Alarm operates continuously.

Reset ON:

Beep

Simultaneous ON: Alarm operates at light ON. 3 seconds ON: Alarm operates for 3 seconds.

*4: The operation when the switch is pushed once during each trouble.

-17-

When the detector is not connected to indoor unit When using detector without connecting to indoor unit such as when the detector is used only as a alarm, the power is not supplied. In such occasion, connect DC18V to detector XY terminal.
About of temperature sensor You can change IU main unit return air temperature sensor to the refrigerant leak detector side. Regarding the setting method, refer to the Installation Manual of the remote controller (RC-EX3D or later).

XY terminal

-18-

MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD.
2-3, Marunouchi 3-chome, Chiyoda-ku, Tokyo, 100-8332, Japan (Japonya) https://www.mhi-mth.co.jp
MITSUBISHI HEAVY INDUSTRIES AIR-CONDITIONING EUROPE, LTD.
5 The Square, Stockley Park, Uxbridge, Middlesex UB11 1ET, United Kingdom Tel : +44-333-207-4072 Fax : +44-333-207-4089 https://www.mhiae.com
MHIAE SERVICES B.V.
(Wholly-owned subsidiary of MITSUBISHI HEAVY INDUSTRIES AIR-CONDITIONING EUROPE, LTD.) Herikerbergweg 238, Luna ArenA, 1101 CM Amsterdam, Netherlands P.O.Box 23393 1100 DW Amsterdam, Netherlands Tel : +31-20-406-4535 http://www.mhiaeservices.com/
MITSUBISHI HEAVY INDUSTRIES AIR-CONDITIONERS AUSTRALIA, PTY. LTD.
Block E, 391 Park Road, Regents Park, NSW, 2143 PO BOX 3167, Regents Park, NSW, 2143 Tel : +61-2-8774-7500 Fax : +61-2-8774-7501 https://www.mhiaa.com.au
MITSUBISHI HEAVY INDUSTRIES - MAHAJAK AIR CONDITIONERS CO., LTD.
220 Lad Krabang Industrial Estate Free Zone 3, Soi Chalongkrung 31, Kwang Lamplatiew, Khet Lad Krabang, Bangkok 10520, Thailand Tel : +66-2-326-0401 Fax : +66-2-326-0419 https://www.mhi.com/group/maco/

References

Adobe PDF Library 9.9