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Air to Air Heat Exchanger with DX Coil Unit

Installation Manual

Air to Air Heat Exchanger with DX Coil Unit

Installation Manual

How to check

To display an error code or to confirm the operation status, the remote controller (wired remote controller and
central remote controller) is equipped with an LCD display, and the interface circuit board of the outdoor unit is
equipped with a 7 segment display. A self-diagnosis function is activated to find out the details of a problem with
the unit.

Error code list

The table below shows the error codes. See the table for details of error codes.
• To confirm the code from the remote controller, see “Wired remote controller display” in the table.
• To confirm the code from the outdoor unit, see “7 segment display on the outdoor unit” in the table.
• To confirm the code from the AI-NET central remote controller, see “AI-NET central controller display” in the

table.

Wired

remote

controller

display

Error code

Error code name

Judging

device

7 segment display on the

outdoor unit

AI-NET

central

controller

display

Auxiliary code

E01

—

Communication error between remote controller and
indoor unit (Detected by remote controller)

Remote

controller

E02

—

Remote controller signal transmission error

Remote

controller

E03

—

Communication error between remote controller and
indoor unit (Detected by indoor unit)

Indoor

E04

—

Indoor/outdoor unit communication circuit error (Detected
by indoor unit)

Indoor

E06

The number of the indoor
units received normally

Decrease of the number of indoor units

I/F

—

E07

—

Indoor/outdoor unit communication circuit error (Detected
by outdoor unit)

I/F

E08

Duplicate indoor addresses

Indoor addresses are duplicated.

Indoor

I/F

E09

—

Header unit controllers are duplicated.

Remote

controller

E10

—

Communication error between indoor MCUs

Indoor

E12

01: Communication

between indoor unit

and outdoor unit

02: Communication

between outdoor

units

Automatic addressing start error

I/F

E15

—

No indoor units during automatic addressing

I/F

E16

00: Capacity over
01~:

The number of

connected units

Exceeding capacity (over 105%) or the number of units

I/F

E18

—

97·99

Communication error between header indoor unit and
follower indoor unit

Indoor

E19

00: No center unit
02: 2 or more center

units

Error with the number of center outdoor units

I/F

E20

00: Connecting outdoor

unit to another

system

01: Connecting indoor

unit to another

system

Connected to another system during automatic addressing

I/F

E21

00: No header unit
01: Duplicated header

units

Error with the number of header thermal storage units

I/F

E22

—

Decrease of the number of thermal storage units

I/F

E23

—

Communication error between indoor and outdoor unit or
problem with the number of thermal storage units (problem
with receiving)

I/F

E25

—

Addresses of terminal outdoor units are duplicated.

I/F

E26

The number of the outdoor
units received normally

Decrease of the number of outdoor units

I/F

E28

Detected number of outdoor
unit

Follower outdoor unit error

I/F

E31

01: Problem with A3-

IPDU1

02: Problem with A3-

IPDU2

03: Problem with A3-

IPDU1 and A3-

IPDU2

04: Problem with the

fan IPDU

05: Problem with A3-

IPDU and the fan

IPDU

06: Problem with A3-

IPDU2 and the fan

IPDU

07: Problem with all

IPDUs

IPDU communication error

I/F

F01

—

Indoor TCJ sensor error

Indoor

F02

—

Indoor TC2 sensor error

Indoor

F03

—

Indoor TC1 sensor error

Indoor

F04

—

TD1 sensor error

I/F

F05

—

TD2 sensor error

I/F

F06

—

TE1 sensor error

I/F

F07

—

TL sensor error

I/F

F08

—

TO sensor error

I/F

F10

—

Indoor TSA sensor error

Indoor

F11

—

Indoor TF sensor error

F12

—

TS1 sensor error

I/F

F13

01: Compressor 1 side
02: Compressor 2 side

TH sensor error

IPDU

F15

—

zzz

Miswiring of outdoor temperature sensor (TE and TL)

I/F

F16

—

Miswiring of outdoor pressure sensor (Pd and Ps)

I/F

F17

—

Indoor TOA sensor error

Indoor

F18

—

Indoor TRA sensor error

Indoor

F23

—

Ps sensor error

I/F

F24

—

Pd sensor error

I/F

F29

—

Other indoor unit errors

Indoor

F31

—

Outdoor unit EEPROM error

I/F

H01

01: Compressor 1 side
02: Compressor 2 side

zzz

Compressor breakdown

IPDU

H02

01: Compressor 1 side
02: Compressor 2 side

Compressor error (Locked)

IPDU

H03

01: Compressor 1 side
02: Compressor 2 side

Current detection circuit error

IPDU

H04

—

Compressor 1 case thermostat operation

I/F

Wired

remote

controller

display

Error code

Error code name

Judging

device

7 segment display on the

outdoor unit

AI-NET

central

controller

display

Auxiliary code

55-EN

56-EN

Summary of Contents for MMD-VN1002HEXE

Page 1: ...Coil Unit Model name Model with a humidifier MMD VNK502HEXE MMD VNK802HEXE MMD VNK1002HEXE MMD VNK1002HEXE2 Model without a humidifier MMD VN502HEXE MMD VN802HEXE MMD VN1002HEXE MMD VN1002HEXE2 Installation Manual 1 English Installation Manual For commercial use ...

Page 2: ...n individual or individuals who have been trained and is thus thoroughly acquainted with the knowledge related to these operations The qualified installer who is allowed to do the electrical work involved in installation relocation and removal has the qualifications pertaining to this electrical work as stipulated by the local laws and regulations and he or she is a person who has been trained in ...

Page 3: ...ns and from heat Failure to wear this protective gear may result in burn Before carrying out the installation maintenance repair or removal work be sure to set the circuit breaker for the Air to Air Heat Exchamger Unit to the OFF position Otherwise electric shocks may result Place a Work in progress sign near the circuit breaker while the installation maintenance repair or removal work is being ca...

Page 4: ...reezing Otherwise the solenoid valve or pipes are damaged and water leakage may result Do not install the unit in a place where the outside temperature especially around the unit or the air grill falls below 0 C Otherwise water in the pipes in the humidifying element or in the solenoid valve freezes and a breakdown or water leakage may result If the ducts pass through a fire protection zone use a ...

Page 5: ...ools are required for the new refrigerant R410A For connecting pipes use new and clean piping designed for R410A and please care so that water or dust does not enter To Disconnect the Appliance from Main Power Supply Means for disconnection having a contact separation in all poles at least 3 mm must be incorporated in the fixed wiring in accordance with the wiring rules The installation fuse All T...

Page 6: ...eiling cavity Place exposed to air with high salt content seaside area Place exposed to large quantities of sulfide gas hot spring Should the unit be used in these places special protective measures are needed A restaurant kitchen where a lot of oil is used or place near machines in a factory Oil adhering to the heat exchanger and resin part turbo fan in the indoor unit may reduce the performance ...

Page 7: ... the saturation curve before using the unit Do not install the unit near a water heater A B C C B Dry bulb temperature C Absolute humidity kg kg S a t u r a t i o n C u r v e 5 Installation of Indoor Unit WARNING Install the air conditioner at enough strong place to withstand the weight of the unit If the strength is not enough the unit may fall down resulting in injury To provide against strong w...

Page 8: ...198 103 X Y Z Installing the indoor unit Attaching the duct connector Attach 4 duct connectors to the unit using the six screws supplied for each connector Attaching the washers and nuts 1 Procure the hanging bolts nuts and washers locally 2 Attach the washers and nuts to the hanging bolt M12 as shown in the figure on the right Fixing the unit 1 Fit the hanging bracket on the hanging bolt then adj...

Page 9: ...fier CAUTION Install the water supply pipes after washing the inside of them with water Install a drain valve on the water supply pipe then drain the water until the drained water runs clear Do not to allow cutting fluid or detergent to enter the pipes The water quality of the humidifiers supply water should meet public waterworks standards and have a hardness less than 100mg ℓ If the supply water...

Page 10: ...od is used do not attach the hood to a place where rain may fall directly In this case using a rectangle hood is recommended Stuff the cracks in the pipe penetration part with a noncombustible material such as mortar 1 Excessive bending 2 Multi times bending 3 Making the connecting duct smaller 4 Bending near the exhaust air duct Heat insulator Insulates the adapter and the aluminium tape Outside ...

Page 11: ...e is not performed properly If the indoor unit should be turned on perform vacuuming from both the liquid side and the gas side Opening the valve fully Open the valves of the designated outdoor unit fully Outer dia of copper pipe A 0 0 4 In case of flaring for R410A with the conventional flare tool pull it out approx 0 5 mm more than that for R22 to adjust to the specified flare size The copper pi...

Page 12: ...r with DX Coil Unit 1 Power supply Wiring for the power supply Air to Air Heat Exchanger with DX Coil Unit VNK502HEXE VN502HEXE VNK802HEXE VN802HEXE I phase 50Hz 220 240V I phase 60Hz 220V Current rating Fuse rating of circuit breaker switch for indoor units should be selected by the accumulated total current values of the indoor units cable 3 core 2 5 mm2 in conformity with Design 60245 IEC66 VNK...

Page 13: ...emote controller sold separately Indoor control circuit board MCC1615 Connector White Connector Black External output 220 240V under 1A each 5 External input sold separately No voltage a contact input Voltage DC 12V 24V input Operation output White White Red Connector White 6 Yellow Connector Red 6 White Red Red Red Blue Orange Red Blue Orange White Yellow Blue Purple Red 1 Common 2 Remote control...

Page 14: ...ock R L S N Operation output Common External damper output 3 4 Abnormal Bypass mode output 3 5 Cord clamp 40 60 10 10 R L S N Earth wire Wiring for the remote controller Wiring between indoor and outdoor unit Earth Screw 2mm or less Power supply wire Remote control wiring Wiring diagram Use a 0 5mm2 to 2mm2 wire Address setting Refer to the Installation Manual of the outdoor unit for address setti...

Page 15: ...u cannot change the ventilation FAN speed or ventilation mode If two remote controllers are used the latter operation overrides the former and their indications always reflect the result of the latter operation B Air to Air Heat Exchanger with DX Coil Unit system linked with air conditioners You can use the remote controller to ON OFF running Air conditioners and Air to Air Heat Exchanger with DX ...

Page 16: ...stop only the Air to Air Heat Exchanger with DX Coil Unit in the system using NRC 01HE For this operation it is necessary to change the settings Setting modifications are required for separate control Refer to 13 Advanced Control on page 20 When the Air to Air Heat Exchanger with DX Coil Unit system linked with indoor air conditioners is used set the Air to Air Heat Exchanger with DX Coil Unit as ...

Page 17: ...at Exchanger with DX Coil Unit Remote ON OFF adapter NRB 1HE locally procured 1 2 DC12V DC24V non polarity CN706 Blue 1 Orange 2 2m 2 When the output signal of the external device is a no voltage a contact static signal Transmission wire used to extend must be locally procured Non polarity shielded wire H05 VVC4V5 K or 60227 IEC 74 0 5mm2 Maximum length 50m Insert the remote ON OFF adapter NRB 1HE...

Page 18: ...y procured Adapter for remote ON OFF control NRB 1HE CN705 Control circuit board of the Air to Air Heat Exchanger with DX Coil Unit SW1 Low is applied when SW2 is closed and High when it is open As these terminals are not used insulate them 1 3 No voltage a contact Yellow 2 Red 3 White 4 Green 1 Black 5 2m 4 Connecting an auxiliary fan or monitoring operation output External Output Connect to the ...

Page 19: ...ions on the outdoor interface circuit board While the automatic addresses are being set up no remote controller operations can be performed Setup takes up to 10 minutes usually about 5 minutes When the power is turned on after automatic address setup It takes up to 10 minutes usually about 3 minutes for the outdoor unit to start operating after the power has been turned on Before the Air to Air He...

Page 20: ...Low EA High active High may be Extra High 0000 Normal Adjusting this setting is necessary for all the Air to Air Heat Exchanger with DX Coil Units in the group 4C Nighttime heat purge 0000 Invalid 0001 0048 Start after Setting value x 1 hour s Setting for the time before the nighttime heat purge operation starts 0000 Nighttime heat purge OFF Adjusting this setting is necessary for all the Air to A...

Page 21: ...ault Valid VENT Setting of the unbalanced ventilation Fan speed SA EA unbalanced operation of the Air to Air Heat Exchanger with DX Coil Unit is possible Use the button of the remote controller Adjust this setting for all the Air to Air Heat Exchanger with DX Coil Units when group operation is applied Though RBC AMT32E cannot be used this setting can still be changed For details refer to Ventilati...

Page 22: ... to Air Heat Exchanger with DX Coil Unit to which an external device is connected Select ED in step 3 Select a value from the table below in step 4 Contact is off during switching the damper Heat exchange mode Bypass mode regardless of the selected value Abnormal signal bypass mode signal output setting Terminals 3 to 5 for external output can be used to detect an abnormal signal bypass mode signa...

Page 23: ...1 0 0 0 1 0 2 0 3 0 External static pressure Pa Air volume m3 h Current A Low High Extra High Low High Extra High MMD VNK802HEXE Standard air volume 800m3 h Lower limit air volume 480m3 h Upper limit air volume 960m3 h MMD VN802HEXE Standard air volume 800m3 h Lower limit air volume 480m3 h Upper limit air volume 960m3 h 50Hz 230V 60Hz 220V 50Hz 230V 60Hz 220V 0 100 200 300 400 500 0 200 400 600 8...

Page 24: ... or more exists between the terminal block of the power supply and the earth earthing If resistance of less than 1 MΩ is detected do not run the unit 2 Check all valve of the outdoor unit being opened fully To protect the compressor at activation time leave power ON for 12 hours or more be for operating Do not press the electromagnetic contactor to forcibly perform a test run This is very dangerou...

Page 25: ... result CAUTION Wear protective gloves when performing maintenance Otherwise an injury may result Maintenance of the filter and heat exchanger element Filter maintenance Clean the filter once or twice a year 1 Clean the filter if is indicated on the remote controller 2 Press the button after cleaning the filter The indicator disappears 1 Open the inspection cover Enter the ceiling cavity remove th...

Page 26: ...them the heat exchanger elements will become clogged and a breakdown may result 3 Attach the inspection cover Fit the fixing lever to the inspection cover to attach it securely and fix the fixed part of Inspection cover with a screw Cleaning remote controller Wipe with a dry soft cloth Do not use benzine thinner scouring powder chemical cloth etc as those may cause deformation or breakage Maintena...

Page 27: ...ification element then detach the tube 3 MMD VNK802 MMD VNK1002 Pull the back humidification element to detach NOTE Drain water remaining in the humidification element into the drain pan Do not bend fold or pull the water supply tube Washing the humidification element Wash away dust and dirt from the humidification element by putting the element in a bucket of water Move the element in the bucket ...

Page 28: ...th DX Coil Unit the check code and the indoor unit No appear on the display part of the remote controller The check code is only displayed during the operation If the display disappears operate the Air to Air Heat Exchanger with DX Coil Unit according to the following Confirmation of error log for confirmation Confirmation of error log When an error occurred on the Air to Air Heat Exchanger with D...

Page 29: ...lower indoor unit Indoor E19 E19 00 No center unit 02 2 or more center units 96 Error with the number of center outdoor units I F E20 E20 00 Connecting outdoor unit to another system 01 Connecting indoor unit to another system 42 Connected to another system during automatic addressing I F E21 E21 00 No header unit 01 Duplicated header units 42 Error with the number of header thermal storage units ...

Page 30: ... P05 01 Phase loss detected 02 Phase order error AF Phase loss is detected or phase order error I F Wired remote controller display Error code Error code name Judging device 7 segment display on the outdoor unit AI NET central controller display Auxiliary code Problems detected by TCC LINK central remote controller P07 P07 01 Compressor 1 side 02 Compressor 2 side 1C Heat sink overheat IPDU I F P0...

Page 31: ...may be Extra High High may be Extra High Indoor unit Indoor unit Indoor unit Indoor unit Model name Model name Model name Model name Check the addresses of the indoor units For details see Advanced control in this manual Code 12 for the system 13 for indoor units and 14 for groups Line Indoor Group Line Indoor Group Line Indoor Group Line Indoor Group Settings Settings Settings Settings Did you ch...

Page 32: ...n is running 0000 0001 0002 0003 0004 No change ON during normal operation ON during normal operation or the nighttime heat purge operation ON during the nighttime heat purge operation ON when the SA fan is running ON when the EA fan is running 0000 0001 0002 0003 0004 No change ON during normal operation ON during normal operation or the nighttime heat purge operation ON during the nighttime heat...

Page 33: ...ti air conditioners is 0 3kg m3 NOTE 1 If there are 2 or more refrigerating systems in a single refrigerating device the amounts of refrigerant should be as charged in each independent device For the amount of charge in this example The possible amount of leaked refrigerant gas in rooms A B and C is 10kg The possible amount of leaked refrigerant gas in rooms D E and F is 15kg NOTE 2 The standards ...

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