Argo ASR518HL Manual

TECHNICAL DATA
& SERVICE MANUAL
INDOOR UNIT: ASR518HL
SPLIT SYSTEM AIR CONDITIONER
0.8180.249.0 07/2002
Model No. Product Code No.
ASR518HL 387006969

IMPORTANT!
Please read before installation
This air conditioning system meets strict safety and operating
standards.
For the installer or service person, it is important to install or
service the system so that it operates safely and efficiently.
For safe installation and trouble-free operation, you must:
• Carefully read this instruction booklet before beginning.
• Follow each installation or repair step exactly as shown.
• Observe all local, state and national electrical codes.
• ay close attention to all warning and caution notices given in
this manual.
•The unit must be supplied with a dedicated electrical line.
This symbol refers to a hazard or unsafe practice which can result
in severe personal injury or death.
This symbol refers to a hazard or unsafe practice which can result
in personal injury or product or property damage.
If necessary, et help
These instructions are all you need for most installation sites and
maintenance conditions.
If you require help for a special problem, contact our sale/service
outlet or your certified dealer for additional instructions.
In case of improper installation
The manufacturer shall in no way be responsible for improper
installation or maintenance service, including failure to follow the
instructions in this document.
SPECIAL PRECAUTIONS
• During installation, connect before the refrigerant system and
then the wiring one; proceed in the reverse orden when removing
the units.
When wirin
ELECTRICAL SHOCK CAN CAUSE SEVERE
PERSONAL INJURY OR DEATH. ONLY QUALIFIED,
EXPERIENCED ELECTRICIANS SHOULD ATTEMPT
TO WIRE THIS SYSTEM.
• Do not supply power to the unit until all wiring and tubing are
completed or reconnected and checked, to ensure the grounding.
• Highly dangerous electrical voltages are used in this system.
Carefully refer to the wiring diagram and these instructions when
wiring.
Improper connections and inadequate grounding can cause
accidental injury and death.
•Ground the unit following local electrical codes.
• The Yellow/Green wire cannot be used for any connection
different from the ground connection.
• Connect all wiring tightly. Loose wiring may cause overheating
at connection points and a possible fire hazard.
• Do not allow wiring to touch the refrigerant tubing, compressor,
or any moving parts of the fan.
• Do not use multi-core cable when wiring the power supply and
control lines. Use separate cables for each type of line.
When transportin
Be careful when picking up and moving the indoor and outdoor
units. Get a partner to help, and bend your knees when lifting to
reduce strain on your back. Sharp edges or thin aluminium fins on
the air conditioner can cut your fingers.
When installin ...
• Keep all tubing runs as short as possible.
• Use the flare method for connecting tubing.
• Apply refrigerant lubricant to the matching surfaces of the flare
and union tubes before connecting them; screw by hand and
then tighten the nut with a torque wrench for a leak-free
connection.
• Check carefully for leaks before starting the test run.
NOTE:
Depending on the system type, liquid and gas lines may be either
narrow or wide. Therefore, to avoid confusion, the refrigerant
tubing for your particular model is specified as narrow tube for
liquid, wide tube for gas.
When servicin
• Turn the power OFF at the main power board before opening
the unit to check or repair electrical parts and wiring.
• Keep your fingers and clothing away from any moving parts.
• Clean up the site after the work, remembering to check that no
metal scraps or bits of wiring have been left inside the unit being
serviced.
• Ventilate the room during the installation or testing the refrigeration
system; make sure that, after the installation, no gas leaks are
present, because this could produce toxic gas and dangerous
if in contact with flames or heat-sources.
WARNING
CAUTION
WARNING
… In a ceiling
Make sure the ceiling is strong enough to hold the unit-weight.
It may be necessary to build a strong wooden or metal frame to
provide added support.
… In a room
Properly insulate any tubing run inside a room to prevent
"sweating", which can cause dripping and water damage to
walls and floors.
... In moist or uneven locations
Use a raised concrete base to provide a solid level foundation
for the outdoor unit. This prevents damage and abnormal
vibrations.
... In area with strong winds
Securely anchor the outdoor unit down with bolts and a metal
frame. Provide a suitable air baffle.
... In a snowy area (for heat pump-type systems)
Install the outdoor unit on a raised platform that is higher then
drifting snow. Provide snow vents.
When connecting refrigerant tubing
2

Page
1. SPECIFICATIONS 4
1-1 Unit specifications 4
1-2 Major Component specifications 5
1-3 Other Component specifications 6
2. DIMENSIONAL DATA 7
3. ELECTRICAL DATA 8
3-1 Electric Wiring Diagrams 8
4. FUNCTION 9
4-1 Room Temperature Control 9
4-2 Dry Operation (Dehumidification) 11
4-3 Automatic Switching between Cooling and Heating 11
4-4 Freeze Prevention (Cooling and Dry) 12
4-5 Overload Prevention (Heating) 12
4-6 Cold Draft Prevention (Heating) 13
4-7 Defrosting Operation (Heating) 14
4-8 Drain Pump and float switch 15
5. TROUBLESHOOTING 16
5-1 Check before and after troubleshooting 16
5-2 Air conditioner does not operate 16
5-3 Some part of air conditioner does not operate 20
5-4 Air conditioner operates, but abnormalities are observed 22
5-5 If a sensor is defective 24
6. CHECKING ELECTRICAL COMPONENTS 25
6-1 Measurement of Insulation Resistance 25
6-2 Checkin
g
Continuit
y
of Fuse on PCB Ass'
y
26
6-3 Checking Motor Capacitor 26
7. MAINTENANCE 27
7-1 Changing Address of Remote Control Unit in Indoor Unit 27
Table of Contents
3

1. SPECIFICATIONS
1-1 Unit Specifications
ASR518HL
Power source
V
olta
g
e ratin
g
Performance
Capacity
Air circulation (High/Med/Low) m³/h
Features
Controls/Temperature controls
Control unit
Timer
Fan speed
Airflow direction Vertical
Air Filter
Operation sound Hi/Me/Lo dB-A
Refrigerant tubing connections
Refrigerant Narrow tube mm(in.)
tube diameter Wide tube mm(in.)
Refrigerant
Refrigerant tube kit / Air clean filter
Dimensions & Wei
g
ht
Dimensions Unit Height mm
Width mm
Depth mm
Ceiling panel Height mm
Width mm
Depth mm
Package dimensions Unit Height mm
Width mm
Depth mm
Volume m3
Ceiling panel Height mm
Width mm
Depth mm
Volume m3
Weight Unit Net kg
Shipping kg
Ceiling panel Net kg
Shipping kg
DATA SUBJECT TO CHANGE WITHOUT NOTICE
Cooling Heating
See catalogue with the requested matching
750/630/530
273
A
uto
12,7 (1/2)
Optional / -------
R407C / R22
Flare type
Washable, Anti-Mold
45/40/37
Microprocessor/ I.C. thermostat
Wireless remote control unit
3 and Auto /1(Hi)
ON/OFF 24 hours & Daily program, 1-hour OFF
4,70
220 - 240V ~ 50H
z
230V
744
0,07
18,2
22,7
6,35 (1/4)
575
730
730
575
64
0,18
380
2,50
110
800
650
800
4

1-2 Major Component Specifications
ASR518HL
Controller PCB
Part No.
Controls
Control circuit fuse
Remote Control Unit
Fan & Fan Motor
Type
Q'ty ……. Dia. and lenght mm
Fan motor model…Q'ty
No. Of poles…rpm (230 V)
Running Amps A
Power input W
Coil resistance (Ambient temp. 20 °C ) ΩBLU-BLK: 231,0
BLK-GRY: 50,2
GRY-RED: 27,8
RED-WHT: 119,5
WHT-BLU: 49,5
Safety devices Type
Operating temp. Open °C
Close °C
Run capacitor µF
VAC
Flap Motor
Type
Model
Rating
No of poles …rpm
Nominal output W
Coil resistance (Ambient temp. 20 °C ) kΩ
Heat Exch. Coil
Coil
Rows
Fin pitch mm
face area m2
DATA SUBJECT TO CHANGE WITHOUT NOTICE
2
0,33
75
2
Synchro moto
r
Internal thermal protector
160 ± 10K
130 ± 15K
3/2,5
M2LJ24ZE31
1,3
16,45 ± 15%
Microprocessor
250 V - 3,15
A
1…. Ø 280 / L 175
450
8 …. 2,5/3,0
0,258
XR188EH
RCS-6HPN4E-G
Centrifugal fan
R4E280-AK45-12…1
4 … 890/750/650/280
A
luminium plate fin / Copper tube
A
C 208/230V 50/60H
z
5

1-3 Other Component Specifications ASR518HL
Trasformer
Rating Primary
Secondary
Capacity
Coil resistance Ω
(
at 21°C
)
Thermal cut-off temp.
Thermistor
(
Coil sensor TH1
)
Resistance ΚΩ
Thermistor
(
Room sensor TH2
)
Resistance ΚΩ
Drain pump
Model
Rating Voltage
Input
Total head capacity
Safet
y
float switch
Model
Contact rating 230V AC/DC - 0,5
A
0,4 l/min
BI 1300 2725
PC 309564003
220/240V - 50H
z
14W
A
TR-J105
A
C 230V, 50/60H
z
19V - 0.526
A
10 V
A
DTN-TKS134B
25 °C 5,0 ± 3%
PBC-41E-S14
Primary (WHT-WHT): 205 ± 10%
Secondary (BRN-BRN): 2,0 ± 10%
150°C
0 °C 15,3 ± 5%
6

2. DIMENSIONAL DATA
Units: mm
7

3. ELECTRICAL DATA
3-1 Electric Wiring Diagrams
8

4. FUNCTION
4-1. Room Temperature Control
■Cooling
●Room temperature control is obtained by cycling the compressor ON and OFF under control of the room
temperature sensor in the remote control unit.
●The room temperature (and other informations) is transmitted every 5minutes by the remote control unit to the
controller in the indoor unit.
●The control circuit will not attempt to turn the compressor ON until the compressor has been OFF for at least
3 minutes. To protect the compressor from stalling out when trying to start against the high side refrigerant
pressure, the control circuit has a built-in automatic time delay to allow the internal pressure to equalize.
●As a protective measure, the control circuit switches the compressor OFF not before than 5 minutes of
compressor operation.
●Thermo. ON : When the room temperature is above T + 1°C (T°C is set temperature).
Compressor ➞ON
●Thermo. OFF : When the room temperature is equal to or below set temperature T°C.
Compressor ➞OFF
5minutes 5minutes 5minutes 5minutes 5minutes 5minutes 5minutes
3 minutes5 minutes
ON OFF ON OFF ON OFFCompressor
ON OFF ON OFF ON OFF
More than
5 minutes
Outdoor fan
Indoor fan Set speed
T+1 °C
T°Cset temp.
Thermo.
OFF Thermo. OFF Thermo. ON Thermo. OFF
Thermo.
ON
Thermo.
ON
Thermo.
ON
Room temp.
Signal from remote control unit
9

■Heating
●Room temperature control is obtained by cycling the compressor ON and OFF under control of the room
temperature sensor in the remote control unit.
●The room temperature (and other information) is transmitted every 5minutes by the remote control unit to the
controller in the indoor unit.
●The control circuit will not attempt to turn the compressor ON until the compressor has been OFF for at least 5
minutes. To protect the compressor from stalling out when trying to start against the high side refrigerant
pressure, the control circuit has a built-in automatic time delay to allow the internal pressure to equalize.
●As a protective measure, the control circuit switches the compressor OFF not before than 5 minutes
of compressor operation.
●Thermo. ON : When the room temperature is below T –1°C (T°C is set temperature).
Compressor ➞ON
●Thermo. OFF : When the room temperature is equal to or above set temperature T°C.
Compressor ➞OFF
*1: Refer to "4-6Cold Draft Prevention".
NOTE
5minutes 5minutes 5minutes 5minutes 5minutes 5minutes
5 minutes 5 minutes
ON OFF ONOFF
Compressor OFF
ON OFF ONOFF
Outdoor fan OFF
Set speed LL LL
ON
OFF
OFF OFF ON OFF ON
OFF
OFF ON
ON ( Reversing cycle )
Thermo.
ON Thermo.
OFF Thermo.
ON Thermo.
OFF
More than
5 minutes
Signal from remote control unit
T°C
T–1°C
T–2°C
set temp.
Indoor fan
Standby lamp
Indoor heat exch.
coil temp. *1 35 °C
Solenoid coil
(4–way valve)
Operation button
Room temp.
Set speed
30 seconds30 seconds
10
LL

4-2. Dry Operation (Dehumidification)
●Dry operation uses the ability of the cooling cycle to remove moisture from the air, but by running at low level to
dehumidify without greatly reducing the room temperature. The air conditioner repeats the ON/OFF cycle
automatically as shown in the chart below according to the room temperature.
●Intermittent ventilation occurs by switching the indoor fan speed between L ↔LL.
●Dry operation does not occur when the room temperature is under 15°C, which is the monitor zone.
●When the compressor stops, the indoor fan stops as well.
4-3. Automatic Switching between Cooling and Heating
●When AUTO mode is selected, the microprocessor calculates the difference between the set temperature and
the room temperature, and automatically switches to COOLING or HEATING mode to maintain the desired
temperature.
Room temp. ≥Set temp. ➞COOL
Room temp. < Set temp. ➞HEAT
This means that if the room temperature is higher than or equal to the set temperature, COOLING operation
begins. If the room temperature is lower than the set temperature, HEATING operation begins.
NOTE
Room temp.
Cooling operation
T+2 °C
Set temp. T °C
T–1°C
Monitor zone
Both the indoor and outdoor units stop.
Room temp. 15 °C
*Dry A zone
Compressor :
FMI (indoor fan) : Continuous operation L (low speed) / LL (very low speed) intermittent ventilation
only while the compressor is ON.
*Dry B zone
Compressor :
FMI (indoor fan) : Intermittent operation (ON for 3 minutes and OFF for 9 minutes) L (low speed) / LL (very low speed) intermittent ventilation
only while the compressor is ON.
11

4-4. Freeze Prevention (Cooling)
●This function prevents freezing of the indoor heat exchange coil.
●When the compressor has been running for 10 minutes or more and the temperature of the indoor heat
exchange coil falls below –1°C, the control circuit stops the compressor for at least 6 minutes. The compressor
does not start again until the temperature rises above 8°C or 6 minutes has elapsed.
4-5. Overload Prevention (Heating)
●This function prevents overheating of the indoor heat exchange coil.
●When the temperature of the indoor heat exchange coil rises above 59°C, and if the indoor fan is L (low speed),
then the fan speed changes from L (low speed) to M (medium speed).
●When the temperature of the indoor heat exchange coil rises above 61°C, the outdoor fan stops.
ONON OFF
ON
H or M or L H ➞H, M ➞M, L ➞M
61
59
52
49
Indoor heat
exch. coil
temp. °C
Outdoor fan
Indoor fan
Compressor
ON ON ON ON
OFFOFF
Set speed
More than
10 minutes
6 minutes
T+1 °C
Indoor heat exch.
coil temp. –1°C
Compressor
Indoor fan
Room temp. Thermo. OFF
Thermo. ON
Set temp. T °C
More than
10 minutes
More than
6 minutes
Set speed
12

4-6. Cold draft Prevention (Heating)
●This function controls indoor fan speed so thatstrong draft of cold air could not blow out before the
indoor heat exchange coil have sufficiently warmed up.
●STANDBY lamp of the indoor unit lights up when this function is working.
●When 10 minutes has elapsed, the fan speed is automatically switched to set speed regardless of indoor heat
exchange coil temperature.
OFF
ON
OFF or LL Set speed
Indoor fan
Standby lamp
Indoor heat exch.
coil temp. (°C)
35
Max. 10minutes
13

4-7. Defrosting Operation (Heating)
■ Defrosting Flowchart
Compressor ON
Indoor heat exchanger coil
temperature drops 0.8°C per
6 minutes and it repeats
3 times in succession.
Integrated operating time of
compressor is more than 3
hours.
Defrosting begins.
Cold-draft prevention
Temperature of outdoor heat
exchange coil is higher than
12°C.
Release of defrosting
Indoor fan runs at set speed
when temperature of indoor
heat exchanger reads 35°C.
B
Defrosting time is over 12
minutes.
No LL fan operation during this period.
Compressor keeps running
for at least 6 minutes.
Temperature of outdoor heat
exchanger coil is below 9°C.
Integrated operating time of
compressor is more than 1.5
hours.
Thermo. OFF.
(Compressor OFF)
CD
Temperature of indoor heat
exchanger coil is below 45°C.
Continuous operating time of
compressor is more than 20
minutes.
Outdoor fan is either operated
or stopped for more than 10
minutes.
A
Is outdoor fan continuously
operating for more than 10
minutes?
Integrated operating time of
compressor is more than 50
minutes.
Temperature of indoor heat
exchanger coil is below 45 +
13°C.
Temp. of indoor heat exch.
coil immediately before thermo
goes off is either below 45 + 4°C
or 58 + 4°C(when overload
prevention works).
NO
NO
NO
YES
YES
YES
Overload
prevention works.
Does outdoor fan
stop?
Compressor keeps running for
at least 6 minutes.
Release of overload prevention
(Outdoor fan operates.)
Compressor keeps running for
at least 6 minutes.
NOTE
14

4-8 Drain Pump and Float Switch
Compressor
Drain Pump OFF
Float Switch
NOTE:
Either in Heating or another mode or the unit is stopped, when the float switch is turned ON,
the drain pump operates for 20 minutes minimum
OFF
OFF OFF
OFF
OFF
OFF
ON ON
ON ON ON ON
ON ON
ON
■ Defrosting Mode Timing Chart
*1: Refer to "4-6 Cold Draft Prevention".
NOTE
ON
ON
ON ON ON
ON
ONON
Set speed
OFF
OFF
OFF
OFF
32 seconds Max. 11 minutes 32 seconds
Start of defrosting Release of defrosting
OFF
OFF
Release of
cold draft prevention
Compressor
Outdoor fan
Solenoid coil
(4–way valve)
Indoor fan
Standby lamp
Indoor heat
exch. coil
temp.
ONON
Set speed
* 1
2 seconds 2 seconds
35°C
20' min. 20' min.
3' min.
15

5. TROUBLESHOOTING
5-1. Check before and after troubleshooting
5-1-1. Check power supply wiring.
●Check that power supply wires are correctly connected to terminals Land Non the terminal plate in the outdoor
unit.
WARNING
Hazardous voltage can cause ELECTRIC SHOCK or
DEATH. Disconnect power or turn off circuit breaker
before you start checking or servicing.
5-1-2. Check inter-unit wiring.
●Check that inter-unit wiring is correctly connected to the indoor unit from the outdoor unit.
5-1-3. Check power supply.
●Check that voltage is in specified range (±10% of the rating).
●Check that power is being supplied.
5-1-4. Check lead wires and connectors in indoor and outdoor units.
●Check that coating of lead wires is not damaged.
●Check that lead wires and connectors are firmly connected.
●Check that wiring is correct.
5-2. Air conditioner does not operate.
5-2-1. Circuit breaker trips (or fuse blows).
A. When the circuit breaker is set to ON, it trips immediately. (Resetting is not possible.)
●There is a possibility of ground fault.
●Check insulation resistance.
If resistance value is 2MΩor less, insulation is defective (“NO”).
Measure insulation
resistance of electrical
parts in outdoor unit.
NO
NO
Set circuit breaker to OFF.
*
Measure insulation
resistance of electrical
parts in indoor unit.
1Remove both power supply wires
and inter-unit wires from terminal
plate in outdoor unit.
Measure insulation resistance
of outdoor unit.
•
2Remove inter-unit wires from
terminal plate in indoor unit.
Measure insulation resistance
of indoor unit.
•
•
•
Insulation of
outdoor unit
is defective.
Insulation of
indoor unit
is defective.
WARNING
16

B. Circuit breaker trips in several minutes after turning the air conditioner on.
●There is a possibility of short circuit.
6-2-2. Neither indoor nor outdoor unit runs.
A. Power is not supplied.
B. Check "OPERATION selector" switch in the indoor unit.
YES
NO
•OPERATION selector switch is set
in ON position.
Set OPERATION selector switch
to ON.
Indoor PCB Ass'y is defective.
NO
•Check power supply.
Power is being supplied to the
indoor unit.
Circuit breaker
is tripped.
Power failure
Reset breaker.
Wait for recovery
or contact power
company.
Replace with suitable
one (larger capacity).
•
•
•
NO
Check capacity of circuit breaker.
Capacity of circuit breaker is
suitable.
Measure resistance of outdoor fan
motor winding.
Measure resistance of compressor
motor winding.
•Measure resistance of 4-way valve's
winding.
In case of Heating operation :
5-2-2.
Measure coil resistance of magnetic
contactor. (MG) (SAP-C228EH5)
17

C. Check remote control unit.
D. Check fuse on the indoor PCB Ass'y.
E. Check TIMER on the remote control unit.
•Timer is turned ON. Check to see
if or is displayed on
remote control
YES Cancel the timer mode.
ON
OK
OK
•Check fuse on indoor PCB Ass'y
for continuity. (F01)
•Check operation lamp to see
if light is ON.
Light is OFF
•Measure resistance of primary and
secondary winding of transformer.
(TR)
•Indoor PCB Ass'y is defective.
OK
OK
Measure resistance of indoor and
outdoor fan motor winding. (FM)
Measure resistance of compressor
motor winding. (CM)
OK
Replace the fuse.
If fuse has been blown,
OK
•Try to run with another remote
control unit.
First remote control unit is defective.
•Check for residue buildup on
transmitter of remote control unit.
•Check for residue buildup on remote
control receiver on front of indoor
unit.
Clean transmitter.
Clean receiver.
Measure resistance of 4-way valve's
windings
18

5-2-3. Only outdoor unit does not run.
A. Check setting temperature.
B. Check PCB Ass'y in either indoor or outdoor unit.
5-2-4. Only indoor unit does not run.
•Indoor PCB Ass'y is defective.
•Indoor PCB Ass'y is defective.
•Check voltage between terminals
No. 4(+) and No. 5 at terminal plate.
(DC 24V)
No voltage appears.
•Outdoor PCB Ass'y is defective.
OK
OK
NO
Is room temperature too low ?
Try to lower setting temperature by
temperature setting button ( button).
Outdoor unit still does
not run.
Remote control unit is defective.
•Try to run using another remote
control unit.
COOL
OK
NO
Is room temperature too high ?
Try to raise setting temperature by
temperature setting button ( button).
Outdoor unit still does
not run.
•Try to run using another remote
control unit.
HEAT
Remote control unit is defective.
19

5-3. Some part of air conditioner does not operate.
5-3-1. Only indoor fan does not run.
5-3-2. Only flap motor does not run.
5-3-3. Only outdoor fan does not run.
Fan cannot
be turned.
OK
•Check fan rotation.
Turn fan gently once or twice by
hand.
•Check fan casing
foreign matter on
inside.
Fan motor burnout
or foreign matter in
bearings.
Remove foreign
matter or repair.
Repair or replace.
•Measure resistance of outdoor fan
motor winding.
•Check fan motor capacitor.
•Measure resistance of flap motor
winding.
Fan cannot
be turned.
OK
•Check fan rotation.
Turn fan gently once or twice by
hand.
•Check fan casing
foreign matter on
inside.
Fan motor burnout
or foreign matter in
bearings.
Remove foreign
matter or repair.
Repair or replace.
•Measure resistance of indoor fan
motor winding.
•Check fan motor capacitor.
PCB assy is defective.
OK
20