Daikin FDMQ-R Series User manual

Service
Manual
Inverter Pair
Duct Connected Type
FDMQ-R Series
SiUS071735EA
[Applied Models]
zInverter Pair : Heat Pump

SiUS071735EA
iTable of Contents
Inverter Pair
Duct Connected Type
FDMQ-R Series
zHeat Pump
Indoor Unit
FDMQ09RVJU
FDMQ12RVJU
FDMQ15RVJU
FDMQ18RVJU
FDMQ24RVJU
Outdoor Unit
RX09RMVJU
RX09RMVJU9
RX12RMVJU
RX12RMVJU9
RX15RMVJU
RX15RMVJUA
RX18RMVJU
RX18RMVJU9
RX18RMVJU9A
RX24RMVJU
RX24RMVJUA

SiUS071735EA
Table of Contents ii
1. Safety Cautions........................................................................................... v
1.1 Warnings and Cautions Regarding Safety of Workers................................. v
1.2 Warnings and Cautions Regarding Safety of Users....................................vii
2. Icons Used .................................................................................................. x
Part 1 List of Functions ................................................................... 1
1. Functions.....................................................................................................2
Part 2 Specifications ....................................................................... 3
1. Specifications ..............................................................................................4
Part 3 Printed Circuit Board Connector Wiring Diagram ................ 8
1. Indoor Unit...................................................................................................9
1.1 FDMQ09/12/15/18/24RVJU ......................................................................... 9
2. Wired Remote Controller...........................................................................11
2.1 BRC1E73 ................................................................................................... 11
3. Wireless Remote Controller Receiver .......................................................12
3.1 BRC082A43 ............................................................................................... 12
4. Outdoor Unit..............................................................................................13
4.1 RX09/12RMVJU(9)..................................................................................... 13
4.2 RX15/24RMVJU(A), RX18RMVJU(9)(A).................................................... 14
Part 4 Functions and Control......................................................... 15
1. Main Functions..........................................................................................16
1.1 Temperature Control .................................................................................. 16
1.2 Frequency Principle.................................................................................... 16
1.3 Fan Speed Control for Indoor Unit ............................................................. 18
1.4 Program Dry Operation .............................................................................. 19
1.5 Clock and Calendar Setting (With Wired Remote Controller BRC1E73) ... 20
1.6 Schedule TIMER Operation (With Wired Remote Controller BRC1E73) ... 22
1.7 Drain Pump Control.................................................................................... 25
1.8 Hot Start Control (In Heating Operation Only)............................................ 27
1.9 Other Functions.......................................................................................... 28
2. Control Specification .................................................................................29
2.1 Mode Hierarchy .......................................................................................... 29
2.2 Frequency Control...................................................................................... 30
2.3 Controls at Mode Changing/Start-up.......................................................... 32
2.4 Discharge Pipe Temperature Control......................................................... 34
2.5 Input Current Control.................................................................................. 35
2.6 Freeze-up Protection Control ..................................................................... 36
2.7 Heating Peak-cut Control ........................................................................... 37
2.8 Outdoor Fan Control................................................................................... 38
2.9 Liquid Compression Protection Function.................................................... 38
2.10 Defrost Control ........................................................................................... 39

SiUS071735EA
iii Table of Contents
2.11 Electronic Expansion Valve Control ........................................................... 40
2.12 Malfunctions ............................................................................................... 43
Part 5 Remote Controller ............................................................... 44
1. Wired Remote Controller (BRC1E73) .......................................................45
2. Wireless Remote Controller (BRC082A43)...............................................51
Part 6 Service Diagnosis................................................................ 53
1. General Problem Symptoms and Check Items .........................................55
2. Troubleshooting with LED .........................................................................56
2.1 Indoor Unit.................................................................................................. 56
2.2 Outdoor Unit ............................................................................................... 56
3. Service Diagnosis .....................................................................................57
3.1 Wired Remote Controller (BRC1E73) ........................................................ 57
3.2 Wireless Remote Controller (BRC082A43) ................................................ 59
4. Troubleshooting ........................................................................................63
4.1 Error Codes and Description ...................................................................... 63
4.2 Indoor Unit PCB Abnormality ..................................................................... 64
4.3 Drain Level Control System Abnormality.................................................... 65
4.4 Indoor Fan Motor (DC Motor) or Related Abnormality ............................... 66
4.5 Indoor Fan PCB Abnormality...................................................................... 68
4.6 Humidifier or Related Abnormality.............................................................. 69
4.7 Thermistor or Related Abnormality............................................................. 70
4.8 Remote Controller Thermistor Abnormality ................................................ 71
4.9 Signal Transmission Error
(Between Indoor Unit and Remote Controller) ........................................... 72
4.10 Signal Transmission Error
(Between MAIN Remote Controller and SUB Remote Controller) ............. 73
4.11 Low-voltage Detection or Over-voltage Detection...................................... 74
4.12 Signal Transmission Error (Between Indoor Unit and Outdoor Unit).......... 76
4.13 Mismatching of Indoor Unit and Outdoor Unit ............................................ 78
4.14 Outdoor Unit PCB Abnormality................................................................... 79
4.15 OL Activation (Compressor Overload) ....................................................... 80
4.16 Compressor Lock ....................................................................................... 82
4.17 DC Fan Lock (Outdoor Fan Motor)............................................................. 83
4.18 Input Overcurrent Detection ....................................................................... 84
4.19 Four Way Valve Abnormality...................................................................... 85
4.20 Discharge Pipe Temperature Control......................................................... 87
4.21 High Pressure Control in Cooling ............................................................... 88
4.22 System Shutdown due to Compressor Internal Temperature
Abnormality ................................................................................................ 90
4.23 Compressor System Sensor Abnormality .................................................. 91
4.24 Position Sensor Abnormality ...................................................................... 92
4.25 Thermistor or Related Abnormality (Outdoor Unit)..................................... 94
4.26 Electrical Box Temperature Rise................................................................ 96
4.27 Radiation Fin Temperature Rise ................................................................ 97

SiUS071735EA
Table of Contents iv
4.28 Output Overcurrent Detection .................................................................... 98
5. Check ......................................................................................................100
5.1 Thermistor Resistance Check .................................................................. 100
5.2 Indoor Fan Motor Connector Check ......................................................... 101
5.3 Power Supply Waveforms Check............................................................. 101
5.4 Electronic Expansion Valve Check........................................................... 102
5.5 Four Way Valve Performance Check ....................................................... 103
5.6 Inverter Unit Refrigerant System Check................................................... 103
5.7 Inverter Analyzer Check ........................................................................... 104
5.8 Rotation Pulse Check on the Outdoor Unit PCB ...................................... 106
5.9 Installation Condition Check..................................................................... 107
5.10 Discharge Pressure Check....................................................................... 107
5.11 Outdoor Fan System Check ..................................................................... 108
5.12 Main Circuit Short Check.......................................................................... 108
5.13 Power Module Check ............................................................................... 110
Part 7 Trial Operation and Field Settings.................................... 112
1. Pump Down Operation............................................................................113
2. Forced Cooling Operation .......................................................................114
3. Trial Operation ........................................................................................115
4. Field Settings ..........................................................................................118
4.1 How to Change the Field Settings............................................................ 118
4.2 Overview of the Field Settings.................................................................. 121
4.3 MAIN/SUB and Address Setting for Wireless Remote Controller ............ 122
4.4 Facility Setting (cooling at low outdoor temperature) ............................... 124
5. Silicone Grease on Power Transistor/Diode Bridge................................125
Part 8 Appendix............................................................................ 126
1. Piping Diagrams......................................................................................127
1.1 Indoor Unit................................................................................................ 127
1.2 Outdoor Unit ............................................................................................. 128
2. Wiring Diagrams......................................................................................130
2.1 Indoor Unit................................................................................................ 130
2.2 Outdoor Unit ............................................................................................. 131
3. Operation Limit........................................................................................133

Safety Cautions SiUS071735EA
v
1. Safety Cautions
Be sure to read the following safety cautions before conducting repair work.
After the repair work is complete, be sure to conduct a test operation to ensure that the equipment
operates normally, and explain the cautions for operating the product to the customer.
Caution Items The caution items are classified into Warning and Caution. The Warning items are
especially important since death or serious injury can result if they are not followed closely. The
Caution items can also lead to serious accidents under some conditions if they are not
followed. Therefore, be sure to observe all the safety caution items described below.
Pictograms This symbol indicates an item for which caution must be exercised.
The pictogram shows the item to which attention must be paid.
This symbol indicates a prohibited action.
The prohibited item or action is shown in the illustration or near the symbol.
This symbol indicates an action that must be taken, or an instruction.
The instruction is shown in the illustration or near the symbol.
1.1 Warnings and Cautions Regarding Safety of Workers
This manual is for the
person in charge of
maintenance and
inspection.
Warning
Do not store equipment in a room with fire sources (e.g., naked flames,
gas appliances, electric heaters).
Be sure to disconnect the power cable from the socket before
disassembling equipment for repair.
Working on equipment that is connected to the power supply may cause an
electrical shock.
If it is necessary to supply power to the equipment to conduct the repair or
inspect the circuits, do not touch any electrically charged sections of the
equipment.
If refrigerant gas is discharged during repair work, do not touch the
discharged refrigerant gas.
Refrigerant gas may cause frostbite.
When disconnecting the suction or discharge pipe of the compressor at
the welded section, evacuate the refrigerant gas completely at a well-
ventilated place first.
If there is gas remaining inside the compressor, the refrigerant gas or
refrigerating machine oil discharges when the pipe is disconnected, and it may
cause injury.
If refrigerant gas leaks during repair work, ventilate the area.
Refrigerant gas may generate toxic gases when it contacts flames.

SiUS071735EA Safety Cautions
vi
Be sure to discharge the capacitor completely before conducting repair
work.
The step-up capacitor supplies high-voltage electricity to the electrical
components of the outdoor unit.
A charged capacitor may cause an electrical shock.
Do not turn the air conditioner on or off by plugging in or unplugging the
power cable.
Plugging in or unplugging the power cable to operate the equipment may cause
an electrical shock or fire.
Be sure to wear a safety helmet, gloves, and a safety belt when working
in a high place (more than 2 m (6.5 ft)).
Insufficient safety measures may cause a fall.
In case of R-32 / R-410A refrigerant models, be sure to use pipes, flare
nuts and tools intended for the exclusive use with the R-32 / R-410A
refrigerant.
The use of materials for R-22 refrigerant models may cause a serious accident,
such as a damage of refrigerant cycle or equipment failure.
Do not mix air or gas other than the specified refrigerant (R-32 / R-410A /
R-22) in the refrigerant system.
If air enters the refrigerant system, an excessively high pressure results,
causing equipment damage and injury.
Warning
Caution
Do not repair electrical components with wet hands.
Working on the equipment with wet hands may cause an electrical shock.
Do not clean the air conditioner with water.
Washing the unit with water may cause an electrical shock.
Be sure to provide an earth / grounding when repairing the equipment in
a humid or wet place, to avoid electrical shocks.
Be sure to turn off the power switch and unplug the power cable when
cleaning the equipment.
The internal fan rotates at a high speed, and may cause injury.

Safety Cautions SiUS071735EA
vii
1.2 Warnings and Cautions Regarding Safety of Users
Be sure to conduct repair work with appropriate tools.
The use of inappropriate tools may cause injury.
Be sure to check that the refrigerating cycle section has cooled down
enough before conducting repair work.
Working on the unit when the refrigerating cycle section is hot may cause
burns.
Conduct welding work in a well-ventilated place.
Using a welder in an enclosed room may cause oxygen deficiency.
Caution
Warning
Do not store the equipment in a room with fire sources (e.g., naked
flames, gas appliances, electric heaters).
Be sure to use parts listed in the service parts list of the applicable model
and appropriate tools to conduct repair work. Never attempt to modify the
equipment.
The use of inappropriate parts or tools may cause an electrical shock,
excessive heat generation or fire.
If the power cable and lead wires are scratched or have deteriorated, be
sure to replace them.
Damaged cable and wires may cause an electrical shock, excessive heat
generation or fire.
Do not use a joined power cable or extension cable, or share the same
power outlet with other electrical appliances, since it may cause an
electrical shock, excessive heat generation or fire.
Be sure to use an exclusive power circuit for the equipment, and follow
the local technical standards related to the electrical equipment, the
internal wiring regulations, and the instruction manual for installation
when conducting electrical work.
Insufficient power circuit capacity and improper electrical work may cause an
electrical shock or fire.

SiUS071735EA Safety Cautions
viii
Be sure to use the specified cable for wiring between the indoor and
outdoor units.
Make the connections securely and route the cable properly so that there is no
force pulling the cable at the connection terminals.
Improper connections may cause excessive heat generation or fire.
When wiring between the indoor and outdoor units, make sure that the
terminal cover does not lift off or dismount because of the cable.
If the cover is not mounted properly, the terminal connection section may cause
an electrical shock, excessive heat generation or fire.
Do not damage or modify the power cable.
Damaged or modified power cables may cause an electrical shock or fire.
Placing heavy items on the power cable, or heating or pulling the power cable
may damage it.
Do not mix air or gas other than the specified refrigerant (R-32 / R-410A /
R-22) in the refrigerant system.
If air enters the refrigerant system, an excessively high pressure results,
causing equipment damage and injury.
If the refrigerant gas leaks, be sure to locate the leaking point and repair
it before charging the refrigerant. After charging the refrigerant, make
sure that there is no leak.
If the leaking point cannot be located and the repair work must be stopped, be
sure to pump-down, and close the service valve, to prevent refrigerant gas from
leaking into the room. Refrigerant gas itself is harmless, but it may generate
toxic gases when it contacts flames, such as those from fan type and other
heaters, stoves and ranges.
When relocating the equipment, make sure that the new installation site
has sufficient strength to withstand the weight of the equipment.
If the installation site does not have sufficient strength or the installation work
is not conducted securely, the equipment may fall and cause injury.
Check to make sure that the power cable plug is not dirty or loose, then
insert the plug into a power outlet securely.
If the plug is dusty or has a loose connection, it may cause an electrical shock
or fire.
When replacing the coin battery in the remote controller, be sure to
dispose of the old battery to prevent children from swallowing it.
If a child swallows the coin battery, see a doctor immediately.
Warning

Safety Cautions SiUS071735EA
ix
Caution
Installation of a leakage breaker is necessary in some cases depending
on the conditions of the installation site, to prevent electrical shocks.
Do not install the equipment in a place where there is a possibility of
combustible gas leaks.
If combustible gas leaks and remains around the unit, it may cause a fire.
Check to see if parts and wires are mounted and connected properly, and
if connections at the soldered or crimped terminals are secure.
Improper installation and connections may cause excessive heat generation,
fire or an electrical shock.
If the installation platform or frame has corroded, replace it.
A corroded installation platform or frame may cause the unit to fall, resulting in
injury.
Check the earth / grounding, and repair it if the equipment is not properly
earthed / grounded.
Improper earth / grounding may cause an electrical shock.
Be sure to measure insulation resistance after the repair, and make sure
that the resistance is 1 MΩor higher.
Faulty insulation may cause an electrical shock.
Be sure to check the drainage of the indoor unit after the repair.
Faulty drainage may cause water to enter the room and wet the furniture and
floor.
Do not tilt the unit when removing it.
The water inside the unit may spill and wet the furniture and floor.