Daikin VAM350J8VEB User manual

Service manual
VRV system air conditioner
VAM350J8VEB
VAM500J8VEB
VAM650J8VEB
VAM800J8VEB
VAM1000J8VEB
VAM1500J8VEB
VAM2000J8VEB
EKVDX32A2VEB
EKVDX50A2VEB
EKVDX80A2VEB
EKVDX100A2VEB
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Disclaimer
Service manual
2
VAM350~2000J8VEB + EKVDX32~100A2VEB
VRV system air conditioner
ESIE22-07 – 2022.02
Disclaimer
The present publication is drawn up by way of information only and does not constitute an offer binding upon
Daikin Europe N.V.. Daikin Europe N.V. has compiled the content of this publication to the best of its knowledge.
No express or implied warranty is given for the completeness, accuracy, reliability or fitness for particular purpose
of its content and the products and services presented therein. Specifications are subject to change without prior
notice. Daikin Europe N.V. explicitly rejects any liability for any direct or indirect damage, in the broadest sense,
arising from or related to the use and/or interpretation of this publication. All content is copyrighted by Daikin
Europe N.V..
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Version log
Service manual
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VAM350~2000J8VEB + EKVDX32~100A2VEB
VRV system air conditioner
ESIE22-07 – 2022.02
Version log
Version code Description Date
ESIE22-07 Document release February 2022
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Table of Contents
Service manual
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VAM350~2000J8VEB + EKVDX32~100A2VEB
VRV system air conditioner
ESIE22-07 – 2022.02
Table of Contents
1 Safety precautions 6
1.1 Meaning of warnings and symbols................................................................................................................................. 6
1.2 Dangers ........................................................................................................................................................................... 7
1.3 Warnings ......................................................................................................................................................................... 7
1.4 Cautions .......................................................................................................................................................................... 13
1.5 Notices ............................................................................................................................................................................ 13
2 General operation 14
3 Troubleshooting 19
3.1 To retrieve error codes and check error history ............................................................................................................ 19
3.1.1 Via the indoor unit remote controller BRC1H ............................................................................................... 19
3.2 Error based troubleshooting........................................................................................................................................... 21
3.2.1 A0-00 – External protection device activated ............................................................................................... 21
3.2.2 A0-11 – R32 leakage detection ...................................................................................................................... 22
3.2.3 A1-00 – Main PCB abnormality ...................................................................................................................... 23
3.2.4 A3-00 – Drain water level abnormality .......................................................................................................... 23
3.2.5 A3-08 – Drain pump connector open ............................................................................................................ 24
3.2.6 A6-01-02-05-06 – Fan motor abnormality - motor lock................................................................................ 25
3.2.7 A6-10-12-14-16 – Fan motor abnormality - overcurrent or IPM protection................................................ 26
3.2.8 A6-11-13-15-17 – Fan motor abnormality - position detection error .......................................................... 27
3.2.9 A6-22 – Unstable fan rpm .............................................................................................................................. 28
3.2.10 A6-28 – Airflow rate below critical threshold ................................................................................................ 28
3.2.11 A6-29 – Airflow rate too low .......................................................................................................................... 29
3.2.12 A6-30 – Airflow rate lower than normal ........................................................................................................ 30
3.2.13 A8-01 – Fan motor abnormality - power supply abnormality ....................................................................... 31
3.2.14 A9-01 – Y1E Expansion valve coil abnormality .............................................................................................. 31
3.2.15 A9-02 – Y1E Expansion valve body abnormality ............................................................................................ 32
3.2.16 AF-00 – Drain back flow ................................................................................................................................. 33
3.2.17 AJ-01 – A1P Capacity setting error................................................................................................................. 34
3.2.18 AJ-02 – A1P Setting error for Y1E expansion valve........................................................................................ 34
3.2.19 C1-00 – Communication abnormality between main PCB and fan PCB ....................................................... 35
3.2.20 C4-00 – Liquid thermistor abnormality.......................................................................................................... 36
3.2.21 C5-00 – Gas thermistor abnormality.............................................................................................................. 36
3.2.22 C6-01-11-21-31 – Compatibility error between main PCB and fan PCB ....................................................... 37
3.2.23 C6-02-12-22-32 – Setting error between main PCB and fan PCB ................................................................. 37
3.2.24 C6-05-15-25-35 – Fan PCB EEPROM error..................................................................................................... 38
3.2.25 C6-06-16-26-36 – Fan PCB fin thermistor malfunction ................................................................................. 39
3.2.26 C6-07-17-27-37 – Fan PCB fin thermistor abnormality ................................................................................. 40
3.2.27 C9-00 – Air thermistor abnormality ............................................................................................................... 40
3.2.28 CA-00 – Discharge thermistor abnormality ................................................................................................... 41
3.2.29 CH-00 – CO2 sensor alarm ............................................................................................................................. 41
3.2.30 CH-01 – R32 leak detection sensor failure or disconnected ......................................................................... 42
3.2.31 CH-02 – R32 leak detection sensor life time is exceeded.............................................................................. 43
3.2.32 CH-05 – R32 leak detection sensor life time <6 months ............................................................................... 43
3.2.33 CH-10 – R32 leak detection sensor replacement to confirm ........................................................................ 44
3.2.34 CJ-00 – Remote controller air thermistor abnormality ................................................................................. 45
3.2.35 U5-04 – Communication abnormality between indoor unit main PCB and remote controller ................... 45
3.2.36 U5-06 – Supervisor remote controller not connected/not set ..................................................................... 47
3.2.37 U8-00 – Transmission error between Master and Slave remote controller ................................................. 47
3.2.38 U9-01 – Other indoor unit has error.............................................................................................................. 48
3.2.39 U9-02 – Other indoor unit has error.............................................................................................................. 48
3.2.40 UA-00 – Wrong remote controller ................................................................................................................. 49
3.2.41 UC-00 – Central address duplication error .................................................................................................... 49
3.2.42 UE-00 – Communication abnormality with central controller ...................................................................... 50
3.2.43 UJ-34 – Capacity mismatch between VAM and DX module .......................................................................... 50
3.2.44 UJ-35 – Abnormality at VAM unit .................................................................................................................. 51
3.2.45 UJ-36 – Transmission error between VAM and EKVDX ................................................................................. 51
3.2.46 UJ-37 – VAM unit has A6-28 error ................................................................................................................. 51
3.2.47 UJ-38 – VAM unit has A6-29 error ................................................................................................................. 52
3.2.48 60-00 – External protection device activated................................................................................................ 52
3.2.49 64-01 – Indoor air thermistor malfunction.................................................................................................... 53
3.2.50 64-02 – Indoor air thermistor out of range ................................................................................................... 53
3.2.51 65-01 – Outdoor air thermistor malfunction................................................................................................. 54
3.2.52 65-02 – Outdoor air thermistor out of range ................................................................................................ 54

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3.2.53 65-03 – Low outdoor air temperature ........................................................................................................... 55
3.2.54 6A-00 – Damper related malfunction ............................................................................................................ 55
4 Maintenance 57
4.1 Maintenance for heat reclaim ventilation units............................................................................................................. 57
4.1.1 Maintenance safety precautions ................................................................................................................... 57
4.1.2 Checklist for maintenance of the heat reclaim ventilation unit.................................................................... 58
4.1.3 Maintenance of the air filter .......................................................................................................................... 58
4.1.4 Maintenance of the heat exchange element................................................................................................. 60
4.2 Maintenance for DX units............................................................................................................................................... 60
4.2.1 Checklist for yearly maintenance of the indoor unit ..................................................................................... 60
4.2.2 Cleaning the air outlet.................................................................................................................................... 61
4.2.3 Maintenance before a long stop period ........................................................................................................ 61
4.2.4 Maintenance after a long stop period ........................................................................................................... 61
5 Technical data 62
5.1 Detailed information setting mode ................................................................................................................................ 62
5.1.1 Detailed information setting mode: Indoor unit ........................................................................................... 62
5.1.2 Detailed information setting mode: Remote controller................................................................................ 62
5.2 Wiring diagram................................................................................................................................................................ 63
5.2.1 Wiring diagram: VAM-J8................................................................................................................................. 63
5.2.2 Wiring diagram: EKVDX .................................................................................................................................. 68
5.3 Piping diagram ................................................................................................................................................................ 72
5.3.1 Piping diagram: Indoor unit............................................................................................................................ 72
5.4 Component overview...................................................................................................................................................... 73
5.4.1 Component overview: DX unit ....................................................................................................................... 73
5.4.2 Component overview: Heat reclaim ventilation unit .................................................................................... 74
5.5 Switchbox overview ........................................................................................................................................................ 77
5.6 Field information report ................................................................................................................................................. 79
5.7 Service tools .................................................................................................................................................................... 82
5.8 Field settings ................................................................................................................................................................... 83
5.8.1 To retrieve the field settings .......................................................................................................................... 83
5.8.2 Overview of field settings for DX units........................................................................................................... 88
5.8.3 Overview of field settings for heat reclaim ventilation units ........................................................................ 90

1 | Safety precautions
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VRV system air conditioner
ESIE22-07 – 2022.02
1 Safety precautions
The precautions described in this document cover very important topics, follow
them carefully.
All activities described in the service manual must be performed by an authorized
person.
If you are NOT sure how to install, operate or service the unit, contact your dealer.
In accordance with the applicable legislation, it might be necessary to provide a
logbook with the product containing at least:
information on maintenance, repair work, results of tests, stand-by periods, …
Also, at least, following information must be provided at an accessible place at the
product:
▪Instructions for shutting down the system in case of an emergency
▪Name and address of fire department, police and hospital
▪Name, address and day and night telephone numbers for obtaining service
In Europe, EN378 provides the necessary guidance for this logbook.
1.1 Meaning of warnings and symbols
DANGER
Indicates a situation that results in death or serious injury.
DANGER: RISK OF ELECTROCUTION
Indicates a situation that could result in electrocution.
DANGER: RISK OF BURNING/SCALDING
Indicates a situation that could result in burning/scalding because of extreme hot or
cold temperatures.
DANGER: RISK OF EXPLOSION
Indicates a situation that could result in explosion.
WARNING
Indicates a situation that could result in death or serious injury.
WARNING: FLAMMABLE MATERIAL
CAUTION
Indicates a situation that could result in minor or moderate injury.
NOTICE
Indicates a situation that could result in equipment or property damage.
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INFORMATION
Indicates useful tips or additional information.
1.2 Dangers
DANGER: RISK OF BURNING/SCALDING
▪Do NOT touch the refrigerant piping, water piping or internal parts during and
immediately after operation. It could be too hot or too cold. Give it time to return
to normal temperature. If you MUST touch it, wear protective gloves.
▪Do NOT touch any accidental leaking refrigerant.
DANGER: RISK OF ELECTROCUTION
▪Turn OFF all power supply before removing the switch box cover, connecting
electrical wiring or touching electrical parts.
▪Where applicable, stop the equipment's operation first and allow (refrigerant)
pressure to equalize, before turning OFF the power.
▪Disconnect the power supply for more than 10minutes, and measure the voltage
at the terminals of main circuit capacitors or electrical components before
servicing. The voltage MUST be less than 50VDC before you can touch electrical
components. For the location of the terminals, see the wiring diagram. If the
measured voltage is still higher than 50VDC, discharge the capacitors in a safe
manner by using a dedicated capacitor discharge pen to avoid possibility of
sparking.
▪Do NOT touch electrical components with wet hands.
▪Do NOT leave the unit unattended when the service cover is removed.
▪Protect electric componennts from getting wet while the service cover is opened.
1.3 Warnings
WARNING
Improper installation or attachment of equipment or accessories could result in
electrical shock, short-circuit, leaks, fire or other damage to the equipment. ONLY
use accessories, optional equipment and spare parts made or approved by Daikin.
WARNING
Do NOT apply any permanent inductive or capacitance loads to the circuit without
ensuring that this will NOT exceed the permissible voltage and current permitted for
the equipment in use.
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WARNING
If a fault exists that could compromise safety, Do NOT connect electrical supply to
the circuit until it is satisfactorily dealt with. If the fault CANNOT be corrected
immediately but it is necessary to continue operation, an adequate temporary
solution MUST be used. This MUST be reported to the owner of the equipment so all
parties are advised.
Initial safety checks MUST include that:
▪capacitors are discharged: this MUST be done in a safe manner to avoid
possibility of sparking,
▪NO live electrical components and wiring are exposed while charging, recovering
or purging the system.
WARNING
Make sure that the refrigerating piping and components are installed in a position
where they are unlikely to be exposed to any corroding substance.
WARNING
Make sure installation, testing and applied materials comply with applicable
legislation (on top of the instructions described in the Daikin documentation).
WARNING
Make sure the work site environment is clean and safe to work in. Beware of spilled
fluids, like water, oil or other substances.
Protect bystanders from injury and property from possible damage cause by service
works.
WARNING
If any work is to be conducted on the refrigerating equipment or any associated parts
which involves brazing, an appropriate dry powder or CO2 fire extinguisher MUST be
present.
When charging the unit, an appropriate dry powder or CO2 fire extinguisher MUST be
present.
WARNING
No person carrying out work in relation to a refrigerating system which involves
exposing any pipe work shall use any sources of ignition in such a manner that it may
lead to the risk of fire or explosion. All possible ignition sources, including cigarette
smoking, MUST be kept sufficiently far away from the site of installation, repairing,
removing and disposal, during which refrigerant can possibly be released to the
surrounding space. Prior to work taking place, the area around the equipment is to
be surveyed to make sure that there are no flammable hazards or ignition risks. "No
Smoking" signs MUST be displayed.
WARNING
Tear apart and throw away plastic packaging bags so that nobody, especially
children, can play with them. Possible risk: suffocation.
WARNING
During tests, NEVER pressurise the product with a pressure higher than the
maximum allowable pressure (as indicated on the nameplate of the unit).
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WARNING
Make sure the total refrigerant charge is in accordance with the room size in which
the unit is installed: please consult the detailed instructions on charging and allowed
room sizes in the installation manual.
WARNING
▪NEVER mix different refrigerants or allow air to enter the refrigerant system.
▪NEVER charge recovered refrigerant from another unit. Use recovered refrigerant
only on the same unit where it was recovered from, or have it recycled at a
certified facility.
WARNING
When reconnecting a connector to the PCB, make sure to connect it on the correct
location and do NOT apply force, as this may damage the connector or connector
pins of the PCB.
WARNING
ALWAYS recover the refrigerant. Do NOT release them directly into the environment.
Use a vacuum pump to evacuate the installation.
WARNING
Removal of refrigerant MUST be according to the following:
When breaking into the refrigerant circuit to make repairs, be sure to remove the
refrigerant from the system first. The refrigerant charge MUST be recovered into the
correct recovery cylinders.
WARNING
Take sufficient precautions in case of refrigerant leakage. If refrigerant gas leaks,
ventilate the area immediately. Possible risks:
▪Excessive refrigerant concentrations in a closed room can lead to oxygen
deficiency.
▪Toxic gas might be produced if refrigerant gas comes into contact with fire.
WARNING
▪Under no circumstances, potential sources of ignition SHALL be used in the
searching for or detection of refrigerant leaks. A halide torch (or any other
detector using a naked flame) MUST NOT be used.
▪Ensure that the detector is NOT a potential source of ignition and is suitable for
the detection of R32.
▪If a leak is suspected, all naked flames MUST be removed or extinguished.
▪Leak detection fluids are also suitable for use with most refrigerants but the use
of detergents containing chlorine MUST be avoided as the chlorine may react
with the refrigerant and corrode the copper pipe-work.
▪If a leakage of refrigerant is found which requires brazing, all of the refrigerant
MUST be recovered from the system, or isolated (by means of shut‑off valves) in
a part of the system remote from the leak.
▪Only use the electronic leak tester for R32. The old flame leak tester CANNOT be
used on a system with HFC refrigerant because there is no chlorine component in
the refrigerant. In case of R32 (HFC) refrigerant, any flame in contact with
(leaking) refrigerant is extremely dangerous.
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WARNING
▪In order to prevent oxygen deficiency and R32 combustion, keep the room well-
ventilated for a healthy work environment. Do NOT work in a confined space. If a
refrigerant leak is detected in a confined room or an inadequately ventilated
location, do NOT start the work until the area has been ventilated appropriately.
▪If the work area is NOT located in the open air, make sure the work area is
adequately ventilated before breaking into the system or conducting any brazing.
The ventilation MUST continue to operate during the period that the work is
carried out to prevent accumulation of refrigerant in the work area. The
ventilation should safely disperse any released refrigerant and preferably
ventilate to the open air.
WARNING
Ensure that no external live wiring is exposed while charging, recovering or purging
the system. Sparks created when live wiring is short-circuited might ignite the
refrigerant if it is leaked into the room while charging, recovering or purging the
system.
WARNING
Ensure that the unit is properly earthed prior to conducting maintenance or service
or charging the system with refrigerant. Do NOT earth the unit to a utility pipe, surge
absorber, or telephone earth. Incomplete earthing may cause electrical shock.
WARNING
▪ONLY use copper wires.
▪Make sure the field wiring complies with the applicable legislation.
▪All field wiring MUST be performed in accordance with the wiring diagram
supplied with the product.
▪NEVER squeeze bundled cables and make sure they do NOT come in contact with
the piping and sharp edges. Make sure no external pressure is applied to the
terminal connections.
▪Make sure to install earth wiring. Do NOT earth the unit to a utility pipe, surge
absorber, or telephone earth. Incomplete earth may cause electrical shock.
▪Make sure to use a dedicated power circuit. NEVER use a power supply shared by
another appliance.
▪Make sure to install the required fuses or circuit breakers.
▪Make sure to install an earth leakage protector. Failure to do so may cause
electrical shock or fire.
▪When installing the earth leakage protector, make sure it is compatible with the
inverter (resistant to high frequency electric noise) to avoid unnecessary opening
of the earth leakage protector.
WARNING
Make sure the markings on the unit remain visible and legible after inspection or
repair work. Markings and signs that are illegible shall be corrected.
WARNING
▪After finishing the electrical work, confirm that each electrical component and
terminal inside the electrical components box is connected securely.
▪Make sure all covers are closed before starting up the unit.
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WARNING
▪The area MUST be checked with an appropriate refrigerant detector prior to and
during work, to ensure the technician is aware of potentially toxic or flammable
atmospheres.
▪Ensure that the leak detection equipment being used is suitable for use with all
applicable refrigerants, i.e. non-sparking, adequately sealed or intrinsically safe.
▪Prior to and during work, the area MUST be checked with an appropriate
refrigerant detector capable of detecting R32 refrigerant, to ensure a work
environment free of refrigerant.
WARNING
▪Equipment MUST be labelled stating that it has been de-commissioned and
emptied of refrigerant.
▪The label MUST be dated and signed.
▪For appliances containing flammable refrigerants, ensure that there are labels on
the equipment stating the equipment contains flammable refrigerant.
WARNING
Before carrying out refrigerant recovery procedure, it is essential that the technician
is completely familiar with the equipment and all its details. It is recommended good
practice that all refrigerants are recovered safely. Prior to the task being carried out,
an oil and refrigerant sample MUST be taken in case analysis is required prior to re-
use of recovered refrigerant. It is essential that electrical power is available before
the task is commenced.
▪Become familiar with the equipment and its operation.
▪Isolate system electrically.
▪Ensure that mechanical handling equipment is available, if required, for handling
refrigerant cylinders.
▪Ensure that all personal protective equipment is available and is used correctly.
▪Ensure that the recovery process is supervised at all times by a competent
person.
▪Ensure that recovery equipment and cylinders are conform to the appropriate
standards.
▪If a vacuum is NOT possible, make a manifold so that refrigerant can be removed
from various parts of the system.
▪Make sure that cylinder is situated on the scales before recovery takes place.
▪Start the recovery machine and operate in accordance with instructions.
▪Do NOT overfill cylinders (no more than 60% volume liquid charge).
▪Do NOT exceed the maximum working pressure of the cylinder, NOT even
temporarily.
▪When the cylinders have been filled correctly and the process completed, make
sure that the cylinders and the equipment are removed from site promptly and
all isolation valves on the equipment are closed.
▪Recovered refrigerant MUST NOT be charged into another refrigerating system
unless it has been cleaned and checked.
WARNING
All maintenance staff and others working in the local area MUST be instructed on the
nature of work being carried out.
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WARNING
Provide adequate measures to prevent that the unit can be used as a shelter by small
animals. Small animals that make contact with electrical parts can cause
malfunctions, smoke or fire.
WARNING
Prior to start working on systems containing flammable refrigerant, safety checks are
necessary to ensure that the risk of ignition is minimised. Therefore, some
instructions should be followed.
Please refer to the service manual for more information.
WARNING
▪In case refrigerant recovery is required, use the appropriate service ports.
▪If applicable for your unit, use the appropriate recovery mode or field setting to
smoothly recover the refrigerant.
▪ONLY use leak free hoses, couplings and manifolds in good working condition.
▪ONLY use recovery cylinders designated and labelled to recover R32. Note that
thread connection to the cylinder is counter clock.
▪Always use a calibrated scale in good condition prior and during the refrigerant
recovery process to determine the weight of the recovered refrigerant into the
external refrigerant cylinder.
▪Read the operation instructions of the recovery unit prior to connecting the
recovery unit. Verify the recovery unit is suited for R32 refrigerant, check that it is
in good working condition, has been properly maintained and that any associated
electrical components are sealed to prevent ignition in the event of a refrigerant
release. Consult manufacturer if in doubt.
▪Do NOT overfill the refrigerant cylinder, confirm with the supplier of the
refrigerant cylinder about maximum filling ratio if NOT mentioned on the
refrigerant cylinder itself. Generally the maximum filling amount should be
limited to 60% of the maximum volume of the cylinder.
▪Do NOT exceed the maximum working pressure of the refrigerant cylinder, NOT
even temporarily.
▪When the cylinders have been filled correctly, and the refrigerant recovery
process is completed, make sure that the cylinders and the equipment are
removed from site promptly and all stop valves on the equipment are (kept)
closed.
▪The recovered refrigerant MUST be returned to the refrigerant supplier in the
correct recovery cylinder, and the relevant waste transfer note arranged. Do NOT
mix refrigerants in recovery units and especially NOT in cylinders.
▪Recovered refrigerant MUST NOT be charged into another refrigerant system
unless it has been cleaned and checked.
WARNING
If compressor is to be removed, ensure that the compressor has been evacuated to
an acceptable level to make sure that flammable refrigerant does NOT remain within
the lubricant. The evacuation process MUST be carried out prior to returning the
compressor to the supplier. During the refrigerant recovery, confirm that the
crankcase heater of the compressor body is energized to accelerate this process.
When oil is drained from a system, it MUST be carried out safely.
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1.4 Cautions
CAUTION
Wear adequate personal protective equipment (protective gloves, safety glasses,…)
when installing, maintaining or servicing the system.
CAUTION
To avoid injury, do NOT touch the air inlet or aluminium fins of the unit.
CAUTION
▪Do NOT place any objects or equipment on top of the unit.
▪Do NOT sit, climb or stand on the unit.
1.5 Notices
NOTICE
▪Make sure water quality complies with EU directive 2020/2184.
▪Check the system for leaks after each repair/modification of the water side.
▪Check drainage system(s) after repairs.
▪Be careful when tilting units as water may leak.
NOTICE
Make sure refrigerant piping installation complies with applicable legislation. In
Europe, EN378 is the applicable standard.
NOTICE
Make sure the field piping and connections are NOT subjected to stress.
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2 | General operation
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2 General operation
The EKVDX is an airconditioning unit for pretreatment of incoming supply air from
a VAM heat reclaim ventilation unit. For comfort temperature control, it is still
required to install a normal indoor unit.
Do not place the EKVDX before the heat reclaim ventilation unit.
INFORMATION
The following figures are just examples and may NOT completely match your system
layout.
d
a
f
c
h
i
g
e
b
2‒1 For VAM500~1000 and EKVDX32~80
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d
a
f
c
h
i
b
ge
g
e
2‒2 For VAM1500+2000 and EKVDX100
aHeat reclaim ventilation unit (VAM)
bEKVDX indoor unit
cOutdoor unit
dUser interface
eAir inlet duct for EKVDX indoor unit
fDischarge air
gDuct flange(s)
hDrain pipe
iRefrigerant piping + transmission cable
The EKVDX-A DX coil module is a unit based on the FXSA-A VRV indoor unit
(without its fan). The new VAM-J8 range is mechanically the same as the current
VAM-J series but upgraded from PCB and control software point of view to allow
cooperation with the DX coil module. The two units are connected with a field
supplied duct and with necessary wiring for the control.
a
bc
d
e
f
aEKVDX unit
bVAM-J8 unit
cFresh air
dExhaust air
eReturn air
fSupply air
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EKVDX-A/VAM-J8 is a fresh air pre‑treatment solution. Please keep in mind that
this is NOT a comfort solution. It CAN be connected to a VRV IV, VRV IV+ or VRV5
Outdoor Unit. There are some exception for combinations due to R32 safety, such
as VAM350J8 and EKVDX32A2 combination is NOT allowed, these combination
rules are present in the Databook. The unit is delivered by default for VRV5
connection.
VAM-J8 is flexible for installation: CAN be installed horizontally, vertically or upside
down and it is also possible to choose the connecting duct length in function of
installation and available ESP conditions. EKVDX-A however, is NOT flexible for
installation as you might expect, because it is a DX unit. See installer reference
guide for more details.
VAM-J8 unit CAN be installed stand‑alone as a Heat Recovery Ventilator while
EKVDX-A CANNOT be installed stand‑alone.
The two units are connected to each other with the use of field supplied ducts.
Depending on the combination of units a duct reducer may be required in order to
match the diameter of the duct connection of the two units. The reducer is placed
inside the EKVDX-A unit for easier transportation.
Operation logic
a
b
c
d e
f
VAM EKVDX
aReturn side
bSupply side
cDuct
dSuction thermistor R1T
eDischarge thermistor R5T
fTarget temperature
Measurement
Control
When combining VAM + EKVDX-A, the setpoint on the remote controller will be the
target temperature that supply air should have at the end of the duct (just before
the ventilated room). Achieving the target temperature will be done indirectly via
the measurement of R5T (temperature after coil) and a correction factor (CF)
functionality available on the remote controller:
▪If ducting is long or NOT well insulated or R5T does NOT correspond to the
average supply air temperature, target temperature will be different than R5T. In
these cases CF CAN be applied to increase/reduce evaporation/condensation
temperature to achieve such R5T which will result to the required target
temperature.
In cooling, target temperature = R5T + CF
In heating, target temperature = R5T − CF
▪If ducting is short or well insulated, the installer can consider that R5T= target
temperature, so NO need to set any CF (CF=0 by default).
▪Correction factor CAN be set by field setting 20-13. Default setting is 0. CF CAN
be set in range 0~7 with increments of 0.5.
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VRV system air conditioner
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▪Example: Remote controller is set to Cooling and temperature is set to 19°C. R5T
(discharge temperature) is 19°C but we expect that air will reach the room at
21°C due to heat losses in the ducting. In this case, you MUST use of correction
factor 21-13=5 [it means CF=2]. Then the unit tries to achieve R5T = 17°C which
will result to target temperature = 19°C.
Wiring
INDEPENDENT SYSTEM
VRV
F1/F2
F1/F2 P1/P2 F1/F2 P1/P2 F1/F2 P1/P2 F1/F2 P1/P2 F1/F2 P1/P2 F1/F2 P1/P2
P1/P2 P1/P2 P1/P2 P1/P2
VAM-J8 VAM-J8 VAM-J8EKVDX-A EKVDX-A VRV DX
BRC1H52/82 BRC1H52/82 BRC1H52/82 BRC1H52/82
F1/F2 In wiring
P1/P2 wiring
F1/F2 Out wiring
CENTRALIZED SYSTEM
VRV
F1/F2
F1/F2 P1/P2
P1/P2
VAM-J8 VAM-J8 EKVDX-A VRV DX
BRC1H52/82
F1/F2
F1/F2
iTM
F1/F2 P1/P2
VAM-J8
P1/P2
BRC1H52/82
P1/P2
BRC1H52/82
P1/P2
BRC1H52/82
P1/P2
BRC1H52/82
F1/F2 P1/P2 F1/F2 P1/P2
VAM-J8 EKVDX-A
F1/F2 P1/P2 F1/F2 P1/P2 F1/F2 P1/P2
F1/F2 In wiring
P1/P2 wiring
F1/F2 Out wiring
F1/F2 wiring should ONLY be connected to EKVDX-A in case of EKVDX-A/VAM pair.
Upon communication initialization of F1/F2 communication circuit via VRV outdoor
unit, if EKVDX-A is detected alone (due to installation mistake or issues at P1/P2
wiring between EKVDX-A and VAM etc) then UJ-35 error will be triggered. If F1/F2
is connected to VAM as well, then UJ-36 error will be triggered.
BRC1H52/82* is the dedicated remote controller for R32 units. In case of VRV R32
and BRC1H51/81 is used, U5-04 error will be triggered. No more than 1 pair of
EKVDX-A/VAM CAN be connected through P1/P2 wiring. EKVDX-A/VAM is ALSO
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2 | General operation
Service manual
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VAM350~2000J8VEB + EKVDX32~100A2VEB
VRV system air conditioner
ESIE22-07 – 2022.02
compatible with VRV IV and VRV IV+, in this case a field setting is required at VAM
and EKVDX-A unit to indicate system is R410A. In this case BRC1H51/81 can be
used.
VAM CAN be installed standalone as well. In this case it should have a separate
remote controller. If centralized control is to be used, then F1/F2 In wiring will
include the standalone VAM. In this case VAM will NOT be registered as a unit via
VRV, but it will be visible through the central controller.
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3 | Troubleshooting
Service manual
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VAM350~2000J8VEB + EKVDX32~100A2VEB
VRV system air conditioner
ESIE22-07 – 2022.02
3 Troubleshooting
3.1 To retrieve error codes and check error history
3.1.1 Via the indoor unit remote controller BRC1H
INFORMATION
Images are in English and for reference ONLY. For more details on the Madoka
Assistant please refer to the BRC1H training course material which is available on the
Daikin Business Portal.
To retrieve the error code
To indicate a system error, the controller displays on the messages zone of the
home screen.
b
a
c
aMessages zone
bMiddle button
cError screen
1Press the middle button to enter the main menu from the home screen.
Result: An error screen is displayed.
2Press the middle button to return to the home screen.
Active error codes are also accessible through the Madoka Assistant for BRC1H.
The active error is shown on the home screen.
e gd f
dActive error
eHome screen
fError(s) details
gNotifications screen
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3 | Troubleshooting
Service manual
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VAM350~2000J8VEB + EKVDX32~100A2VEB
VRV system air conditioner
ESIE22-07 – 2022.02
3Tap the active error.
Result: The detail(s) of the error(s) are shown on the Notifications screen.
To check the error history
To check the error history with the Madoka Assistant for BRC1H:
# Action Image for reference Result
1 Tap the settings icon. The Unit settings
screen is displayed.
2 Tap Errors and
warnings.
The Errors and
warnings screen is
displayed.
3 Tap Error history.
The Error history screen
is displayed.
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