Daikin SkyAir FCQ18PVJU User manual

Service Manual / SkyAir Inverter
R-410A Heat Pump 60Hz / P Series SiUS28-902
Split System Air Conditioners
SkyAir Inverter
R-410A Heat Pump 60Hz
P Series
SiUS28 - 902_a
SiUS28-902
06/2009 AK
Specifications, designs and other content appearing in this brochure are current as of June 2009 but subject to change without notice.

SiUS28-902_a
iTable of Contents
SkyAir Inverter P Series
R-410A Heat Pump 60Hz
1. Introduction ............................................................................................. v
1.1 Safety Considerations for Repair ............................................................. v
1.2 Safety Considerations for Users ............................................................. vi
Part 1 General Information........................................................... 1
1. Model Names and Power Supply............................................................2
2. External Appearance ..............................................................................3
2.1 Indoor Units.............................................................................................. 3
2.2 Outdoor Units........................................................................................... 3
Part 2 Specifications .................................................................... 4
1. Specifications..........................................................................................5
1.1 FCQ ......................................................................................................... 5
1.2 FHQ ......................................................................................................... 6
1.3 FAQ.......................................................................................................... 7
Part 3 List of Electrical and Functional Parts ............................. 8
1. List of Electrical and Functional Parts.....................................................9
1.1 Outdoor Units........................................................................................... 9
1.2 Indoor Units............................................................................................ 10
Part 4 Refrigerant Circuit ........................................................... 11
1. Refrigerant Circuit .................................................................................12
1.1 RZQ18·24·30PVJU ................................................................................ 12
2. Functional Parts Layout ........................................................................14
2.1 RZQ18·30PVJU ..................................................................................... 14
Part 5 Function ........................................................................... 15
1. Operation Mode ....................................................................................16
2. Basic Control.........................................................................................17
2.1 Normal Operation................................................................................... 17
2.2 Compressor PI Control .......................................................................... 18
2.3 Electronic Expansion Valve PI Control .................................................. 19
2.4 Cooling Operation Fan Control ..............................................................20
3. Special Control......................................................................................21
3.1 Startup Control....................................................................................... 21
3.2 Oil Return Operation .............................................................................. 22
3.3 Defrosting Operation .............................................................................. 24
3.4 Pump-down Residual Operation ............................................................ 25
3.5 Restart Standby ..................................................................................... 26

SiUS28-902_a
Table of Contents ii
3.6 Stopping Operation ................................................................................ 27
3.7 Pressure Equalization Prior to Startup ................................................... 28
4. Protection Control .................................................................................29
4.1 High Pressure Protection Control .......................................................... 29
4.2 Low Pressure Protection Control ........................................................... 30
4.3 Discharge Pipe Protection Control......................................................... 31
4.4 Inverter Protection Control ..................................................................... 32
5. Other Control ........................................................................................33
5.1 Heating Operation Prohibition ................................................................ 33
6. Outline of Control (Indoor Unit) .............................................................34
6.1 Drain Pump Control ............................................................................... 34
6.2 Louver Control for Preventing Ceiling Dirt ............................................. 36
6.3 Operation Range of Remote Controller Temperature Sensor................ 37
6.4 Freeze Prevention.................................................................................. 39
6.5 View of Operations of Swing Flaps ........................................................ 40
Part 6 Test Operation ................................................................. 41
1. Test Operation ......................................................................................42
1.1 Procedure and Outline ...........................................................................42
1.2 Operation when Power is Turned On..................................................... 45
2. Outdoor Unit P.C.B. Layout ..................................................................46
3. Field Setting ..........................................................................................47
3.1 Field Setting from Remote Controller..................................................... 47
3.2 Field Setting from Outdoor Unit ............................................................. 55
3.3 Detail of Setting Mode............................................................................ 60
Part 7 Troubleshooting............................................................... 65
1. Symptom-based Troubleshooting .........................................................67
2. Troubleshooting by Remote Controller .................................................70
2.1 The INSPECTION / TEST Button .......................................................... 70
2.2 Self-diagnosis by Wired Remote Controller ........................................... 71
2.3 Self-diagnosis by Wireless Remote Controller....................................... 72
2.4 Operation of the Remote Controller’s Inspection /
Test Operation Button ............................................................................ 75
2.5 Remote Controller Service Mode ........................................................... 76
2.6 Remote Controller Self-Diagnosis Function...........................................78
3. Troubleshooting by Indication on the Remote Controller......................85
3.1 “A0” Indoor Unit: Error of External Protection Device ............................. 85
3.2 “A1” Indoor Unit: P.C.B. Defect............................................................... 86
3.3 “A3” Indoor Unit: Malfunction of Drain Level Control System (S1L)........87
3.4 “A6” Indoor Unit: Fan Motor (M1F) Lock, Overload ................................ 89
3.5 “A7” Indoor Unit: Malfunction of Swing Flap Motor (M1S) ......................90
3.6 “A9” Indoor Unit: Malfunction of Moving Part of
Electronic Expansion Valve (Y1E) ......................................................... 92
3.7 “AF” Indoor Unit: Drain Level above Limit ...............................................94
3.8 “AJ” Indoor Unit: Malfunction of Capacity Determination Device............ 95

SiUS28-902_a
iii Table of Contents
3.9 “C4” Indoor Unit: Malfunction of Thermistor (R2T) for
Heat Exchanger ..................................................................................... 96
3.10 “C5” Indoor Unit: Malfunction of Thermistor (R3T) for Gas Pipes ........... 97
3.11 “C9” Indoor Unit: Malfunction of Thermistor (R1T) for Suction Air .......... 98
3.12 “CA” Indoor Unit: Malfunction of Thermistor for Discharge Air ................99
3.13 “CJ” Indoor Unit: Malfunction of
Thermostat Sensor in Remote Controller ............................................ 100
3.14 “E1” Outdoor Unit: P.C.B. Defect ..........................................................101
3.15 “E3” Outdoor Unit: Actuation of High Pressure Switch .........................102
3.16 “E4” Outdoor Unit: Actuation of Low Pressure Sensor .........................104
3.17 “E5” Inverter Compressor Motor Lock................................................... 106
3.18 “E7” Malfunction of Outdoor Unit Fan Motor .........................................108
3.19 “E9” Outdoor Unit: Malfunction of Moving Part of
Electronic Expansion Valve (Y1E) .......................................................109
3.20 “F3” Outdoor Unit: Abnormal Discharge Pipe Temperature .................111
3.21 “F6” Outdoor Unit: Refrigerant Overcharged ........................................112
3.22 “H9” Outdoor Unit: Malfunction of Thermistor (R1T) for Outdoor Air ....113
3.23 “J3” Outdoor Unit: Malfunction of Discharge Pipe Thermistor (R2T).... 114
3.24 “J5” Outdoor Unit: Malfunction of Thermistor (R3T, R5T) for
Suction Pipe 1, 2 .................................................................................. 115
3.25 “J6” Outdoor Unit: Malfunction of Thermistor (R4T) for
Outdoor Unit Heat Exchanger..............................................................116
3.26 “JA” Outdoor Unit: Malfunction of High Pressure Sensor .....................117
3.27 “JC” Outdoor Unit: Malfunction of Low Pressure Sensor ......................119
3.28 “L1” Outdoor Unit: Malfunction of P.C.B. ..............................................121
3.29 “L4” Outdoor Unit: Malfunction of
Inverter Radiating Fin Temperature Rise ............................................. 122
3.30 “L5” Outdoor Unit: Inverter Compressor Abnormal...............................123
3.31 “L8” Outdoor Unit: Inverter Current Abnormal ......................................124
3.32 “L9” Outdoor Unit: Inverter Start up Error .............................................126
3.33 “LC” Outdoor Unit: Malfunction of Transmission between
Inverter and Control P.C.B...................................................................127
3.34 “P4” Outdoor Unit: Malfunction of
Inverter Radiating Fin Temperature Rise Sensor................................. 128
3.35 “U0” Outdoor Unit: Low Pressure Drop Due to Refrigerant Shortage or
Electronic Expansion Valve Failure .....................................................129
3.36 “U2” Power Supply Insufficient or Instantaneous Failure ......................131
3.37 “U3” Check Operation not Executed ..................................................... 133
3.38 “U4” Malfunction of Transmission between
Indoor Units and Outdoor Units ...........................................................134
3.39 “U5” Malfunction of Transmission between
Remote Controller and Indoor Unit ...................................................... 136
3.40 “U8” Malfunction of Transmission between
Main and Sub Remote Controllers.......................................................137
3.41 “UE” Malfunction of Transmission between
Centralized Remote Controller and Indoor Unit ...................................138
3.42 “UF” System is not Set yet .................................................................... 140
3.43 “UH” Malfunction of System,
Refrigerant System Address Undefined............................................... 141

SiUS28-902_a
Table of Contents iv
4. Troubleshooting by Indication on
the Centralized Remote Controller......................................................143
4.1 “UE” Malfunction of Transmission between
Centralized Remote Controller and Indoor Unit ...................................143
4.2 “M1” P.C.B. Defect ................................................................................ 145
4.3 “M8” Malfunction of Transmission between
Optional Controllers for Centralized Control ........................................146
4.4 “MA” Improper Combination of Optional Controllers for
Centralized Control .............................................................................. 147
4.5 “MC” Address Duplication, Improper Setting .........................................149
5. Troubleshooting by Indication on the Unified ON/OFF Controller.......150
5.1 Operation Lamp Blinks......................................................................... 150
5.2 Display “Under Host Computer Integrate Control” Blinks
(Repeats Single Blink) ......................................................................... 152
5.3 Display “Under Host Computer Integrate Control” Blinks
(Repeats Double Blink) ........................................................................155
Part 8 Appendix ........................................................................ 159
1. Piping Diagrams..................................................................................160
1.1 Outdoor Unit......................................................................................... 160
1.2 Indoor Unit ........................................................................................... 161
2. Wiring Diagrams for Reference...........................................................162
2.1 Outdoor Unit......................................................................................... 162
2.2 Indoor Unit ........................................................................................... 163
3. Thermistor Resistance / Temperature Characteristics........................166
4. Pressure Sensor .................................................................................168
Part 9 Precautions for New Refrigerant (R-410A) ................... 169
1. Precautions for New Refrigerant (R-410A) .........................................170
1.1 Outline.................................................................................................. 170
1.2 Service Tools ....................................................................................... 172

Safety Considerations SiUS28-902_a
vSafety Considerations
1. SAFETY CONSIDERATIONS
Read these SAFETY CONSIDERATIONS carefully before
performing any repair work. Comply with these safety
symbols without fail.
Meanings of DANGER, WARNING, CAUTION, and NOTE
Symbols:
DANGER .............. Indicates an imminently hazardous
situation which, if not avoided, will
result in death or serious injury.
WARNING ............ Indicates a potentially hazardous
situation which, if not avoided, could
result in death or serious injury.
CAUTION ............. Indicates a potentially hazardous
situation which, if not avoided, may
result in minor or moderate injury. It
may also be used to alert against
unsafe practices.
NOTE .................. Indicates situations that may result
in equipment or property-damage
accidents only.
1.1 Safety Considerations for Repair
DANGER
• If refrigerant gas leaks during repair or service,
ventilate the area immediately. Refrigerant gas may
produce toxic gas if it comes into contact with flames.
Refrigerant gas is heavier than air and replaces
oxygen. In the event of an accident, a massive leak
could lead to oxygen depletion, especially in
basements, and an asphyxiation hazard could occur
leading to serious injury or death.
• Do not start or stop the air conditioner operation by
plugging or unplugging the power cable plug if a
plug is used. Plugging or unplugging the power
cable plug to operate the equipment may cause an
electrical shock or fire.
• Use parts listed in the service parts list and
appropriate tools to conduct repair work. The use of
inappropriate parts or tools may cause an electrical
shock or fire.
• Disconnect power before disassembling the
equipment for repairs. Working on the equipment
that is connected to the power supply may cause an
electric shock. If it is necessary to supply power to
the equipment to conduct repairs or to inspect the
circuits, do not touch any electrically charged
sections of the equipment.
• The step-up capacitor supplies high-voltage
electricity to the electrical components of the
outdoor unit. Discharge the capacitor completely
before conducting repair work. A charged capacitor
may cause an electrical shock.
• If refrigerant gas is discharged during repair work,
do not touch the discharged refrigerant gas. The
refrigerant gas may cause frostbite.
• Use only pipes, flare nuts, tools, and other materials
designed specifically for R410A refrigerant systems.
Never use tools or materials designed for R22
refrigerant systems on an R410A refrigerant system.
Doing so can cause a serious accident or an
equipment failure.
• Check to see if the parts and wires are mounted and
connected properly, and if the connections at the
soldered or crimped terminals are secure. Improper
installation and connections may cause excessive
heat generation, fire, or electrical shock.
WARNING
• Prior to disconnecting the suction or discharge pipe
from the compressor at the welded section,
pump-down the refrigerant gas completely in a well-
ventilated place first. If there is refrigerant gas or oil
remaining inside the compressor, the refrigerant gas or
oil can discharge when the pipe is being disconnected
and it may cause an injury.
• Wear a safety helmet, gloves, and a safety belt when
working at an elevated height of more than 6.5 ft (2 m).
Insufficient safety measures may cause a fall resulting
in injury.
• Do not mix air or gas other than the specified
refrigerant R410A to the refrigerant system. If air
enters the refrigerant systems, it can cause an
excessive high pressure resulting in equipment
damage and injury.
• When relocating the equipment, check if the new
installation site has sufficient strength to withstand
the weight of the equipment. If the installation site
does not have sufficient strength and the equipment
is not properly secured, the equipment may fall and
cause injury.
• Securely fasten the outside unit terminal cover
(panel). If the terminal cover/panel is not fastened
properly, dust or water may enter the outside unit
causing fire or electric shock.
• When relocating the system, keep the refrigerant
circuit free from substances other than the specified
refrigerant (R-410A) such as air. Any presence of air
or other foreign substance in the refrigerant circuit
can cause an abnormal pressure rise or rupture,
resulting in injury.
• If refrigerant gas leaks, locate the leaking point and
repair it before charging refrigerant. After charging
refrigerant, check for refrigerant leaks. If the leaking
point cannot be located and the repair work must be
stopped, perform a pump-down and close the
service valve to prevent the refrigerant gas from
leaking into the room. The refrigerant gas itself is
harmless, but it may generate toxic gases if it comes
into contact with flames.

SiUS28-902_a Safety Considerations
Safety Considerations vi
CAUTION
• Do not repair the electrical components with wet
hands. Working on the equipment with wet hands
may cause an electrical shock.
• Do not clean the air conditioner by splashing water
on it. Washing the unit with water may cause an
electrical shock.
• Ground the unit when repairing equipment in a
humid or wet place to avoid electrical shocks.
• Turn off the power when cleaning the equipment to
prevent internal fans that rotate at high speed from
starting suddenly as they can cause injury.
• Let the refrigerant lines cool down before performing
any repair work. Working on the unit when the
refrigerant lines are hot may cause burns.
• All welding and cutting operations must be done in a
well-ventilated place to prevent the accumulation of
toxic fumes or possibly oxygen deficiency to occur.
• Check the grounding and repair it if the equipment is
not properly grounded. Improper grounding may
cause an electrical shock.
• Measure the insulation resistance after the repair.
The resistance must be 1M or higher. Faulty
insulation may cause an electrical shock.
NOTE
• Check the drainage of the indoor unit after finishing
repair work. Faulty drainage may cause water to
enter the room resulting in wet floors and furniture.
• Do not tilt the unit when removing it. The water inside
the unit may spill resulting in wet floors and
furniture.
• Dismantling of the unit, disposal of the refrigerant,
oil, and additional parts, should be done in
accordance with the relevant local, state, and
national regulations.
1.2 Safety Considerations for Users
DANGER
• Never attempt to modify the equipment. Doing so can
cause electrical shock, excessive heat generation, or
fire.
• If the power cable and lead wires have scratches or
have become deteriorated, have them replaced.
Damaged cable and wires may cause an electrical
shock or fire.
• Do not use a joined power cable or an extension
cord, or share the same power outlet with other
electrical appliances as it may cause an electrical
shock or fire.
• Use an exclusive power circuit for the equipment.
Insufficient circuit amperage capacity may cause an
electrical shock or fire.
WARNING
• 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 pulling the power cable may damage the
cable.
• Check the unit foundation for damage on a continual
basis, especially if it has been in use for a long time.
If left in a damaged condition, the unit may fall and
cause injury. If the installation platform or frame has
corroded, have it replaced. A corroded platform or
frame may cause the unit to fall resulting in injury.
• If the unit has a power cable plug and it is dirty, clean
the plug before securely inserting it into a power
outlet. If the plug has a loose connection, tighten it or
it may cause electrical shock or fire.
CAUTION
• After replacing the battery in the remote controller,
dispose of the old battery to prevent children from
swallowing it. If a child swallows the battery, see a
doctor immediately.
• Never remove the fan guard of the unit. A fan rotating
at high speed without the fan guard is very
dangerous.
• Before cleaning the unit, stop the operation of the
unit by turning the power off or by pulling the power
cable plug out from its receptacle. Otherwise an
electrical shock or injury may result.
• Do not wipe the controller operation panel with
benzene, thinner, chemical dust cloth, etc. The panel
may get discolored or the coating can peel off. If it is
extremely dirty, soak a cloth in a water-diluted neutral
detergent, squeeze it well, and wipe the panel clean.
Then wipe it with another dry cloth.

SiUS28-902_a
1General Information
Part 1
General Information
1. Model Names and Power Supply............................................................2
2. External Appearance ..............................................................................3
2.1 Indoor Units.............................................................................................. 3
2.2 Outdoor Units........................................................................................... 3

SiUS28-902_a Model Names and Power Supply
General Information 2
1. Model Names and Power Supply
Indoor Unit Outdoor Unit Power Supply
Ceiling Mounted Cassette Type
(Multi Flow)
FCQ18PVJU RZQ18PVJU
VJ : 1φ, 208~230V, 60Hz
FCQ24PVJU RZQ24PVJU
FCQ30PVJU RZQ30PVJU
Ceiling Suspended Type
FHQ18PVJU RZQ18PVJU
FHQ24PVJU RZQ24PVJU
FHQ30PVJU RZQ30PVJU
Wall Mounted Type FAQ18PVJU RZQ18PVJU
FAQ24PVJU RZQ24PVJU

External Appearance SiUS28-902_a
3General Information
2. External Appearance
2.1 Indoor Units
Ceiling mounted cassette type (Multi flow)
FCQ18PVJU
FCQ24PVJU
FCQ30PVJU
Ceiling suspended type
FHQ18PVJU
FHQ24PVJU
FHQ30PVJU
Wall mounted type
FAQ18PVJU
FAQ24PVJU
2.2 Outdoor Units
RZQ18PVJU
RZQ24PVJU
RZQ30PVJU

SiUS28-902_a
Specifications 4
Part 2
Specifications
1. Specifications..........................................................................................5
1.1 FCQ ......................................................................................................... 5
1.2 FHQ ......................................................................................................... 6
1.3 FAQ.......................................................................................................... 7

Specifications SiUS28-902_a
5Specifications
1. Specifications
1.1 FCQ
Ceiling Mounted Cassette Type (Multi flow)
Notes:
1. The above data are based on the following conditions.
2. Capacities are net, including a deduction for cooling (an addition for heating) for indoor fan motor heat.
Model Indoor unit FCQ18PVJU FCQ24PVJU FCQ30PVJU
Outdoor unit RZQ18PVJU RZQ24PVJU RZQ30PVJU
Power supply 1 phase 60Hz 208-230V 1 phase 60Hz 208-230V 1 phase 60Hz 208-230V
Cooling capacity ¹ Btu/h 18,000 24,000 30,000
Heating capacity ² Btu/h 20,000 27,000 34,000
Indoor unit FCQ18PVJU FCQ24PVJU FCQ30PVJU
Dimensions H×W×D in (mm) 11–3/8 × 33–1/8 × 33–1/8’
(290 x 840 x 840)
11–3/8 × 33–1/8 × 33–1/8’
(290 x 840 x 840)
11–3/8 × 33–1/8 × 33–1/8’
(290 x 840 x 840)
Coil
Type Cross fin coil Cross fin coil Cross fin coil
Rows×Stages×FPI 2 × 12 × 17 2 × 12 × 17 2 × 12 × 17
Face area ft² 5.35 5.35 5.35
Fan
Model QTS45A17M QTS45A17M QTS45A17M
Type Turbo fan Turbo fan Turbo fan
Motor output W 90 90 90
Airflow rate (H/L) cfm (Cooling) 790/670 (Heating) 870/670 (Cooling) 790/670 (Heating) 870/670 900/790
Air filter — — —
Mass (Weight) lb (kg) 73 (33) 73 lbs (33) 73lbs (33)
Piping
connections
Liquid in (mm) φ3/8 (9.5) (Flare connection) φ3/8 (9.5) (Flare connection) φ3/8 (9.5) (Flare connection)
Gas in (mm) φ5/8 (15.8) (Flare connection) φ5/8 (15.8) (Flare connection) φ5/8 (15.8) (Flare connection)
Drain in (mm)
VP25 (External dia. 1–1/4” (32), Internal
dia. 1” (25.4)
VP25 (External dia. 1–1/4” (32), Internal
dia. 1” (25.4)
VP25 (External dia. 1–1/4” (32), Internal
dia. 1” (25.4)
Remote controller
(option)
Wired BRC1D71 BRC1D71 BRC1D71
Wireless BRC7C812 BRC7C812 BRC7C812
Decoration
panels
(option)
Model BYC125K–W19 BYC125K–W19 BYC125K–W19
Color White (10Y9/0.5) White (10Y9/0.5) White (10Y9/0.5)
Dimension
sH×W×D in (mm) 1–5/8 × 37–3/8 × 37–3/8 (41 x 950 x 950)
1–5/8 × 37–3/8 × 37–3/8
(41 x 950 x 950)
1–5/8 × 37–3/8 × 37–3/8
(41 x 950 x 950)
Air filter Resin net (with mold resistant) Resin net (with mold resistant) Resin net (with mold resistant)
Weight lb (kg) 11 lbs (5) 11 lbs (5) 11 lbs (5)
Outdoor unit RZQ18PVJU RZQ24PVJU RZQ30PVJU
Color Ivory Ivory Ivory
Dimensions H×W×D in (mm) 30–5/16 × 35–7/16 × 12–5/8”
770 x 900 x 320)
30–5/16 × 35–7/16 × 12–5/8”
770 x 900 x 320)
30–5/16 × 35–7/16 × 12–5/8”
770 x 900 x 320)
Coil
Type Cross fin coil Cross fin coil Cross fin coil
Rows×Stages×FPI 2 × 34 × 18 2 × 34 × 18 2 × 34 × 18
Face area ft² 7.1 7.1 7.1
Comp.
Model 2YC63HXD#ED 2YC63HXD#ED 2YC63HXD#ED
Type Hermetically sealed swing type Hermetically sealed swing type Hermetically sealed swing type
Motor output kW 1.7 1.7 1.7
Fan
Model P47N11F P47N11F P47N11F
Type Propeller fan Propeller fan Propeller fan
Motor output W 70 70 70
Airflow rate cfm 1,835 1,835 1,835
Mass (Weight) lb (kg) 150 lbs (68 kg) 150 lbs (68 kg) 150 lbs (68)
Piping
connections
Liquid in (mm) φ3/8” (9.5 mm) (Flare connection) φ3/8” (9.5) (Flare connection) φ3/8” (9.5) (Flare connection)
Gas in (mm) φ5/8” (15.8 mm) (Flare connection) φ5/8” (15.8) (Flare connection) φ5/8” (15.8) (Flare connection)
Drain in (mm) φ1” (25.4 mm) (Hole) φ1” (25.4) (Hole) φ1” (25.4) (Hole)
Safety devices
High pressure switch.
Outdoor fan driver overload protector.
Thermal protector for indoor fan motor.
Inverter overload protector.
Fusible plugs. Fuse.
High pressure switch.
Outdoor fan driver overload protector.
Thermal protector for indoor fan motor.
Inverter overload protector.
Fusible plugs. Fuse.
High pressure switch.
Outdoor fan driver overload protector.
Thermal protector for indoor fan motor.
Inverter overload protector.
Fusible plugs. Fuse.
Capacity step % 100-0 100-0 100-0
Refrigerant control Electronic expansion valve Electronic expansion valve Electronic expansion valve
Ref. piping
Standard length ft (m) 25’ (7.5) 25’ (7.5) 25’ (7.5)
Max. length ft (m) 164’ (50) 164’ (50) 164’ (50)
Max. height difference ft (m) 98’ (30) 98’ (30) 98’ (30)
Refrigerant
Model R410A R410A R410A
Charge (factory
charge) Lbs (kg) 5.1 (2.3) 5.1 (2.3) 5.1 (2.3)
Ref. oil Model Refer to the name plate of compressor. Refer to the name plate of compressor. Refer to the name plate of compressor.
Charge L 0.75 0.75 0.75
Drawing Number C : 4D063924D C : 4D063924D C : 4D063924D
Cooling ∗1 Heating ∗2 Equivalent Piping Length Hz, Volts
Indoor : 80°FDB, 67°FWB
Outdoor : 95°FDB
Indoor : 70°FDB
Outdoor : 47°FDB, 43°FWB 25 ft (7.5 m) (Level Difference : 0) 60Hz, 230V

SiUS28-902_a Specifications
Specifications 6
1.2 FHQ
Ceiling Suspended Type
Notes:
1. The above data are based on the following conditions.
2. Capacities are net, including a deduction for cooling (an addition for heating) for indoor fan motor heat.
Model Indoor unit FHQ18PVJU FHQ24PVJU FHQ30PVJU
Outdoor unit RZQ18PVJU RZQ24PVJU RZQ30PVJU
Power supply 1 phase 60Hz 208-230V 1 phase 60Hz 208-230V 1 phase 60Hz 208-230V
Cooling capacity ¹ Btu/h 18,000 24,000 30,000
Heating capacity ² Btu/h 20,000 27,000 34,000
Indoor unit FHQ18PVJU FHQ24PVJU FHQ30PVJU
Color White (10Y9/0.5) White (10Y9/0.5) White (10Y9/0.5)
Dimensions H×W×D in (mm) 7–11/16 × 62–5/8 × 26–3/4
(195 x 1590 x 680)
7–11/16 × 62–5/8 × 26–3/4
(195 x 1590 x 680)
7–11/16 × 62–5/8 × 26–3/4
(195 x 1590 x 680)
Coil
Type Cross fin coil Cross fin coil Cross fin coil
Rows×Stages×FPI 2 × 12 × 15 + 2 × 10 × 15 2 × 12 × 15 + 2 × 10 × 15 2 × 12 × 15 + 2 × 10 × 15
Face area ft² 3.66 + 2.95 3.66 + 2.95 3.66 + 2.95
Fan
Model — — —
Type Sirocco fan Sirocco fan Sirocco fan
Motor output W 130 130 130
Airflow rate (H/L) cfm 790/670 790/670 790/670
Air filter Resin net (With mold resistant) Resin net (With mold resistant) Resin net (With mold resistant)
Mass (Weight) Lbs (kg) 90 (41) 90 (41) 90 (41)
Piping
connections
Liquid in (mm) φ3/8 (9.5) (Flare Connection) φ3/8 (9.5) (Flare connection) φ3/8 (9.5) (Flare connection)
Gas in (mm) φ5/8 (15.8) (Flare connection) φ5/8 (15.8) (Flare connection) φ5/8 (15.8) (Flare connection)
Drain in (mm) VP20 (External dia. 1 (25.4),
Internal dia. 3/4 (19.1)
VP20 (External dia. 1” (25.4 mm),
Internal dia. 3/4” (19.1 mm)
VP20 (External dia. 1” (25.4),
Internal dia. 3/4” (19.1)
Remote controller (option) Wired BRC1D71 BRC1D71 BRC1D71
Wireless BRC7E83 BRC7E83 BRC7E83
Outdoor unit RZQ18PVJU RZQ24PVJU RZQ30PVJU
Color Ivory Ivory Ivory
Dimensions H×W×D in (mm) 30–5/16 × 35–7/16 × 12–5/8
(770 x 900 x 320)
30–5/16 × 35–7/16 × 12–5/8
(770 x 900 x 320)
30–5/16 × 35–7/16 × 12–5/8
(770 x 900 x 320)
Coil
Type Cross fin coil Cross fin coil Cross fin coil
Rows×Stages×FPI 2 × 34 × 18 2 × 34 × 18 2 × 34 × 18
Face area ft² 7.1 7.1 7.1
Comp.
Model 2YC63HXD#ED 2YC63HXD#ED 2YC63HXD#ED
Type Hermetically sealed swing type Hermetically sealed swing type Hermetically sealed swing type
Motor output kW 1.7 1.7 1.7
Fan
Model P47N11F P47N11F P47N11F
Type Propeller fan Propeller fan Propeller fan
Motor output W 70 70 70
Airflow rate cfm 1,835 1,835 1,835
Mass (Weight) Lbs (kg) 150 (68) 150 (68) 150 (68)
Piping
connections
Liquid in (mm) φ3/8 (9.5) (Flare connection) φ3/8 (9.5) (Flare connection) φ3/8 (9.5) (Flare connection)
Gas in (mm) φ5/8 (15.8) (Flare connection) φ5/8 (15.8) (Flare connection) φ5/8 (15.8) (Flare connection)
Drain in (mm) φ1 (25.4) (Hole) φ1 (25.4) (Hole) φ1 (25.4) (Hole)
Safety devices
High pressure switch.
Outdoor fan driver overload protector.
Thermal protector for indoor fan motor.
Inverter overload protector.
Fusible plugs. Fuse.
High pressure switch.
Outdoor fan driver overload protector.
Thermal protector for indoor fan
motor.
Inverter overload protector.
Fusible plugs. Fuse.
High pressure switch.
Outdoor fan driver overload
protector.
Thermal protector for indoor fan
motor.
Inverter overload protector.
Fusible plugs. Fuse.
Capacity step % 100-0 100-0 100-0
Refrigerant control Electronic expansion valve Electronic expansion valve Electronic expansion valve
Ref. piping
Standard length ft (m) 25 (7.5) 25 (7.5) 25 (7.5)
Max. length ft (m) 164’ (50) 164’ (50) 164’ (50)
Max. height difference ft (m) 98’ (30) 98’ (30) 98’ (30)
Refrigerant Model R410A R410A R410A
Charge (factory charge) Lbs (kg) 5.1 (2.3) 5.1 (2.3) 5.1 (2.3)
Ref. oil Model Refer to the name plate of compressor. Refer to the name plate of
compressor.
Refer to the name plate of
compressor.
Charge L 0.75 0.75 0.75
Drawing Number C : 4D063925C C : 4D063925C C : 4D063925C
Cooling ∗1 Heating ∗2 Equivalent Piping Length Hz, Volts
Indoor : 80°FDB, 67°FWB
Outdoor : 95°FDB
Indoor : 70°FDB
Outdoor : 47°FDB, 43°FWB 25 ft (7.5 m) (Level Difference : 0) 60Hz, 230V

Specifications SiUS28-902_a
7Specifications
1.3 FAQ
Wall Mounted Type
Notes:
1. The above data are based on the following conditions.
2. Capacities are net, including a deduction for cooling (an addition for heating) for indoor fan motor heat.
Model Indoor unit FAQ18PVJU FAQ24PVJU
Outdoor unit RZQ18PVJU RZQ24PVJU
Power supply 1 phase 60Hz 208-230V 1 phase 60Hz 208-230V
Cooling capacity ¹ Btu/h 18,000 24,000
Heating capacity ² Btu/h 20,000 26,000
Indoor unit FAQ18PVJU FAQ24PVJU
Color White (3.0Y8.5/0.5) White (3.0Y8.5/0.5)
Dimensions H×W×D in (mm) 11–3/8 × 41–3/8 × 9 (290 x 1050 x 230) 11–3/8 × 41–3/8 × 9 (290 x 1050 x 230)
Coil
Type Cross fin coil Cross fin coil
Rows×Stages×FPI 2 × 14 × 18 2 × 14 × 18
Face area ft² 2.29 2.29
Fan
Model QCL9686M QCL9686M
Type Crossflow fan Crossflow fan
Motor output W 43 43
Airflow rate (H/L) cfm 500/400 635/470
Air filter Resin net (Washable) Resin net (Washable)
Mass (Weight) lb (kg) 31 (14) 31(14)
Piping
connections
Liquid in (mm) φ3/8 (9.5) (Flare connection) φ3/8” (9.5) (Flare connection)
Gas in (mm) φ5/8 (15.8) (Flare connection) φ5/8” (15.8) (Flare connection)
Drain in (mm)
VP13 External dia. 11/16 (17.5)
Internal dia. 1/2 (12.7)
VP13 External dia. 11/16”(17.5)
Internal dia. 1/2 (12.7)
Remote controller (option) Wired BRC1D71 BRC1D71
Wireless BRC7E818 BRC7E818
Outdoor unit RZQ18PVJU RZQ24PVJU
Color Ivory Ivory
Dimensions H×W×D in (mm) 30–5/16 × 35–7/16 × 12–5/8
(770 x 900 x 320)
30–5/16 × 35–7/16 × 12–5/8
(770 x 900 x 320)
Coil
Type Cross fin coil Cross fin coil
Rows×Stages×FPI 2 × 34 × 18 2 × 34 × 18
Face area ft² 7.1 7.1
Comp.
Model 2YC63HXD#ED 2YC63HXD#ED
Type Hermetically sealed swing type Hermetically sealed swing type
Motor output kW 1.7 1.7
Fan
Model P47N11F P47N11F
Type Propeller fan Propeller fan
Motor output W 70 70
Airflow rate cfm 1,835 1,835
Mass (Weight) lb (kg) 150 lbs (67) 150 lbs (67)
Piping
connections
Liquid in (mm) φ3/8 (9.5) (Flare connection) φ3/8 (9.5) (Flare connection)
Gas in (mm) φ5/8 (15.8) (Flare connection) φ5/8 (15.8) (Flare connection)
Drain in (mm) φ1 (25.4) (Hole) φ1 (25.4) (Hole)
Safety devices
High pressure switch.
Outdoor fan driver overload protector.
Thermal protector for indoor fan motor.
Inverter overload protector.
Fusible plugs. Fuse.
High pressure switch.
Outdoor fan driver overload protector.
Thermal protector for indoor fan motor.
Inverter overload protector.
Fusible plugs. Fuse.
Capacity step % 100-0 100-0
Refrigerant control Electronic expansion valve Electronic expansion valve
Ref. piping
Standard length ft (m) 25’ (7.5) 25’ (7.5)
Max. length ft (m) 164’ (50) 164’ (50)
Max. height difference ft (m) 98’ (30) 98’ (30)
Refrigerant Model R410A R410A
Charge (factory charge) Lbs (kg) 5.1 (2.3) 5.1 (2.3)
Ref. oil Model Refer to the name plate of compressor. Refer to the name plate of compressor.
Charge L 0.75 0.75
Drawing Number C : 4D062151D C : 4D062151D
Cooling ∗1 Heating ∗2 Equivalent Piping Length Hz, Volts
Indoor : 80°FDB, 67°FWB
Outdoor : 95°FDB
Indoor : 70°FDB
Outdoor : 47°FDB, 43°FWB 25 ft (7.5 m) (Level Difference : 0) 60Hz, 230V

SiUS28-902_a
List of Electrical and Functional Parts 8
Part 3
List of Electrical and
Functional Parts
1. List of Electrical and Functional Parts.....................................................9
1.1 Outdoor Units........................................................................................... 9
1.2 Indoor Units............................................................................................ 10

List of Electrical and Functional Parts SiUS28-902_a
9List of Electrical and Functional Parts
1. List of Electrical and Functional Parts
1.1 Outdoor Units
Item Name Symbol
Model Remark
(P.C.B. terminal)
RZQ18
PVJU
RZQ24
PVJU
RZQ30
PVJU
Compressor Inverter Type M1C 2YC63HXD#ED
1.7kW —
Output
Fan motor Motor M1F 0.07kW —
Overcurrent relay — 3.2A —
Functional
parts
Electronicexpansion
valve
Cooling Y1E 1400pls A1P X21A
Heating PI control
Four-way valve Y1S STF-01AQ555A1 A1P X25A
Solenoid valve (Hot gas) Y2S TEV-MOAQ1684Y1 A1P X26A
Solenoid valve (Injection) Y3S TEV-MOAQ1685Y1 A1P X27A
Pressure-
related parts
Pressure switch (INV.) S1PH ACB-4UB10
ON: 580+0/-22 psi OFF: 435±22 psi A1P X32A
Fusible plug — DFP-3L 158~167°F —
Pressure sensor (HP) S1NPH NSK-BD042D~212 0~602 psi A1P X504A
Pressure sensor (LP) S1NPL NSK-BD017D-211 -7~247 psi A1P X503A
Thermistor Main
P.C.B.
For outdoor air R1T ST9303-4 A1P X11A
For discharge R2T ST9701-4 A1P X12A 1-2Pin
For suction 1 R3T ST8602A-5 A1P X12A 3-4Pin
For heat exchanger R4T ST8604A-7 A1P X12A 5-6Pin
For suction 2 R5T ST8604A-7 A1P X12A 7-8Pin

SiUS28-902_a List of Electrical and Functional Parts
List of Electrical and Functional Parts 10
1.2 Indoor Units
Parts Name Symbol
Model
Remark
FCQ
18PVJU
FCQ
24PVJU
FCQ
30PVJU
Remote
Controller
Wired Remote
Controller BRC1D71
Option
Wireless Remote
Controller BRC7C812
Motors
Fan Motor M1F 1φ90W 6P
Thermal Protector 266°F : OFF 176°F : ON
Capacitor, fan motor C1 5.0μF450VAC
Drain Pump M1P PLD-12230DM
Thermal Fuse 293°F
Swing Motor M1S MP35HCA [3P007482-1]
Thermistors
Thermistor (Suction Air) R1T ST8601A-1 φ4 L250
20kΩ(77°F)
Thermistor (for Heat
Exchanger High Temp.) R3T ST8605-3 φ8 L630
20kΩ(77°F)
Thermistor (Heat
Exchanger) R2T ST8602A-3 φ6 L630
20kΩ(77°F)
Others
Float Switch S1L FS-0211
Fuse F1U 250V 5A φ5.2
Transformer T1R TR25H25R0
Parts Name Symbol
Model
Remark
FHQ
18PVJU
FHQ
24PVJU
FHQ
30PVJU
Remote
Controller
Wired Remote
Controller BRC1D71 Option
Wireless Controller BRC7E83
Motors
Fan Motor M1F 1φ130W
Thermal protector 266°F : OFF 176°F : ON
Capacitor for Fan Motor C1R 9.0μF-450V
Swing Motor M1S MT8-L[3P058751-1]
AC200~240V
Thermistors
Thermistor (Suction Air) R1T ST8601A-1 φ4 L250
20kΩ(77°F)
Thermistor (for Heat
Exchanger High Temp.) R3T ST8605-6 φ8 L = 1250
20kΩ(77°F)
Thermistor (Heat
Exchanger) R2T ST8602A-6 φ6 L = 1250
20kΩ(77°F)
Others Fuse F1U 250V 5A
Transformer T1R TR25H25R0
Parts Name Symbol
Model
Remark
FAQ
18PVJU
FAQ
24PVJU
Remote
Controller
Wired Remote
Controller BRC1D71 Option
Wireless Controller BRC7E818
Motors
Fan Motor M1F 1φ43W
Thermal protector 266°F : OFF 176°F : ON
Swing Motor M1S MSFBC20C21 [3SB40550-1]
AC200~240V
Thermistors
Thermistor (Suction Air) R1T ST8601-2 φ4 L400
20kΩ(77°F)
Thermistor (for Heat
Exchanger High Temp.) R3T ST8605-2 φ8 L400
20kΩ(77°F)
Thermistor (Heat
Exchanger) R2T ST8602-2 φ6 L400 20kΩ(77°F)
Others Float Switch S1L 250V 3.15A
Fuse F1U OPTION

SiUS28-902_a
11 Refrigerant Circuit
Part 4
Refrigerant Circuit
1. Refrigerant Circuit .................................................................................12
1.1 RZQ18·24·30PVJU ................................................................................ 12
2. Functional Parts Layout ........................................................................14
2.1 RZQ18·30PVJU ..................................................................................... 14

SiUS28-902_a Refrigerant Circuit
Refrigerant Circuit 12
1. Refrigerant Circuit
1.1 RZQ18·24·30PVJU
No. in
refrigerant
system
diagram
Symbol Name Major Function
A M1C Inverter compressor (INV.)
Inverter compressor is operated on frequencies between 52 Hz and 177 Hz by using
the inverter.
17 steps
DM1F Inverter fan Since the system is of air heat exchanging type, the fan is operated at 8-step rotation
speed by using the inverter.
EY1E
Electronic expansion valve
(Main: EV1)
While in heating operation, PI control is applied to keep the outlet superheated degree
of air heat exchanger constant.
G Y1S Solenoid valve (Hot gas: SVP) Prevents the low pressure from transient falling.
JY2S
Solenoid valve (Receiver gas
discharging: SVG) Collects refrigerant to receiver.
M Y3S Four-way valve Switches the operation mode between cooling and heating.
N S1NPH High pressure sensor Detects high pressure.
O S1NPL Low pressure sensor Detects low pressure.
PS1PH
HP pressure switch (For INV.
compressor)
Prevents the increase of high pressure when a malfunction occurs, this switch is
activated at high pressure of 580 psi or more to stop the compressor operation.
S — Fusible plug
Prevents the increase of pressure when abnormal heating is caused by fire or other
heat factors, the fusible part of the plug is molten at a temperature of 158 to 167°F to
release the pressure into the atmosphere.
T—
Pressure regulating valve 1
(Receiver to discharge pipe)
This valve opens at a pressure of 290 to 390 psi for prevention of pressure increase,
thus resulting in no damage of functional parts due to the increase of pressure in
transportation or storage.
1 R1T Thermistor (Outdoor air: Ta) Detects outdoor temperature, correct discharge pipe temperature, and other functions.
2R2T
Thermistor (INV. discharge
pipe: Tdi)
Detects discharge pipe temperature, make the temperature protection control of
compressor, and others.
3 R3T Thermistor (Suction pipe: Ts1) Detects suction pipe temperature, keep the suction superheated degree constant in
heating operation, and other functions.
4R4T
Thermistor (Heat exchanger
deicer: Tb)
Detects liquid pipe temperature of air heat exchanger, determine defrosting operation,
and other functions.
5 R5T Thermistor (Suction pipe: Ts2) Calculates the internal temperature of the compressor.

Refrigerant Circuit SiUS28-902_a
13 Refrigerant Circuit
C : 3D062238B


E
T
S
J
G
O
D
N
A
P
M
S1NPL
S1NPH
S1PH
-