Invest MSC-24/QD FP, MSH-24/QD FP Service Manual
SERVICE MANUAL
INVEST HEAT PUMP
DC INVERTER
SPLIT WALL-MOUNTED TYPE
MSC-24/QD FP
MSH-24/QD FP
V1.0
Nov, 2009
CONTENTS
1. Precaution.................................................................................................................................. 1
1.1 Safety Precaution ................................................................................................................................1
1.2 Warning ............................................................................................................................................... 1
2. Function ..................................................................................................................................... 4
3. Dimension.................................................................................................................................. 6
3.1 Indoor Unit ........................................................................................................................................... 6
3.2 Outdoor Unit ........................................................................................................................................ 7
4. Specification.............................................................................................................................. 8
5. Refrigerant cycle diagram........................................................................................................ 9
6. Wiring diagram ........................................................................................................................ 10
6.1 Indoor Unit ......................................................................................................................................... 10
6.2 Outdoor Unit ...................................................................................................................................... 11
7. Installation details................................................................................................................... 12
7.1 Wrench torque sheet for installation .................................................................................................. 12
7.2 Connecting the cables ....................................................................................................................... 12
7.3 Pipe length and the elevation ............................................................................................................ 12
7.4 Air purging of the piping and indoor unit ............................................................................................ 12
7.5 Pumping down (Re-installation)......................................................................................................... 14
7.6 Re-air purging (Re-installation).......................................................................................................... 15
7.7 Balance refrigerant of the 2-way, 3-way valves ................................................................................. 16
7.8 Evacuation......................................................................................................................................... 17
7.9 Gas charging ..................................................................................................................................... 18
8. Electronic function.................................................................................................................. 19
8.1 Abbreviation....................................................................................................................................... 19
8.2 Display function ................................................................................................................................. 19
8.3 Protection ...................................................................................... Fel! Bokmärket är inte definierat.
8.4 Fan-Only Mode.............................................................................. Fel! Bokmärket är inte definierat.
8.5 Cooling Mode ................................................................................ Fel! Bokmärket är inte definierat.
8.6 Drying mode .................................................................................. Fel! Bokmärket är inte definierat.
8.7 Heating mode ................................................................................ Fel! Bokmärket är inte definierat.
8.8 Auto mode function........................................................................ Fel! Bokmärket är inte definierat.
8.9 Forced operation function .............................................................. Fel! Bokmärket är inte definierat.
8.10 Action of 4-way valve ................................................................... Fel! Bokmärket är inte definierat.
8.11 Two speeds outdoor fan function ................................................. Fel! Bokmärket är inte definierat.
8.12 Timer function.............................................................................. Fel! Bokmärket är inte definierat.
8.13 Sleep function mode.................................................................... Fel! Bokmärket är inte definierat.
8.14 Auto-Restart function................................................................... Fel! Bokmärket är inte definierat.
8.15 Ionizer function(optional) ............................................................. Fel! Bokmärket är inte definierat.
9. Troubleshooting...................................................................................................................... 28
9.1 Indoor Unit Error Display ................................................................................................................... 29
9.2 Diagnosis and Solution...................................................................................................................... 30
9.3 Key parts checking. ........................................................................................................................... 33
1
1. Precaution
1.1 Safety Precaution
To prevent injury to the user or
other people and property damage, the following
instructions must be followed.
Incorrect operation due to
ignoring instruction will cause harm or damage.
Before service unit, be sure to
read this service manual at first.
1.2 Warning
¾ Installation
Do not use a defective or
underrated circuit breaker. Use this appliance on
a dedicated circuit.
There is risk of fire or electric shock.
For electrical work, contact the
dealer, seller, a qualified electrician, or an
Authorized service center.
Do not disassemble or repair the product,
there is risk of fire or electric shock.
Always ground the product.
There is risk of fire or electric shock.
Install the panel and the cover of
control box securely.
There is risk of fire of electric shock.
Always install a dedicated circuit
and breaker.
Improper wiring or installation may cause
fore or electric shock.
Use the correctly rated breaker of
fuse.
There is risk of fire or electric shock.
Do not modify or extend the
power cable.
There is risk of fire or electric shock.
Do not install, remove, or reinstall
the unit by yourself (customer).
There is risk of fire, electric shock,
explosion, or injury.
Be caution when unpacking and
installing the product.
Sharp edges could cause injury, be
especially careful of the case edges and the fins on
the condenser and evaporator.
For installation, always contact
the dealer or an Authorized service center.
There is risk of fire, electric shock,
explosion, or injury.
Do not install the product on a
defective installation stand.
It may cause injury, accident, or damage
to the product.
Be sure the installation area does
not deteriorate with age.
If the base collapses, the air conditioner
could fall with it, causing property damage, product
failure, and personal injury.
Do not let the air conditioner run
for a long time when the humidity is very high
and a door or a window is left open.
Moisture may condense and wet or
damage furniture.
Take care to ensure that power
cable could not be pulled out or damaged during
operation.
There is risk of fire or electric shock.
Do not place anything on the
power cable.
There is risk of fire or electric shock.
Do not plug or unplug the power
supply plug during operation.
There is risk of fire or electric shock.
Do not touch (operation) the
product with wet hands.
There is risk of fire or electric shock.
Do not place a heater or other
appliance near the power cable.
There is risk of fire and electric shock.
Do not allow water to run into
electric parts.
It may cause fire, failure of the product, or
electric shock.
Do not store or use flammable gas
or combustible near the product.
There is risk of fire or failure of product.
Do not use the product in a tightly
closed space for a long time.
Oxygen deficiency could occur.
When flammable gas leaks, turn
off the gas and open a window for ventilation
before turn the product on.
Do not use the telephone or turn switches
on or off.
There is risk of explosion or fire.
If strange sounds, or small or
2
smoke comes from product. Turn the breaker off
or disconnect the power supply cable.
There is risk of electric shock or fire.
Stop operation and close the
window in storm or hurricane. If possible,
remove the product from the window before the
hurricane arrives.
There is risk of property damage, failure
of product, or electric shock.
Do not open the inlet grill of the
product during operation. (Do not touch the
electrostatic filter, if the unit is so equipped.)
There is risk of physical injury, electric
shock, or product failure.
When the product is soaked
(flooded or submerged), contact an Authorized
service center.
There is risk of fire or electric shock.
Be caution that water could not
enter the product.
There is risk of fire, electric shock, or
product damage.
Ventilate the product from time to
time when operating it together with a stove, etc.
There is risk of fire or electric shock.
Turn the main power off when
cleaning or maintaining the product.
There is risk of electric shock.
When the product is not be used
for a long time, disconnect the power supply
plug or turn off the breaker.
There is risk of product damage or failure,
or unintended operation.
Take care to ensure that nobody
could step on or fall onto the outdoor unit.
This could result in personal injury and
product damage.
¾ CAUTION
Always check for gas (refrigerant)
leakage after installation or repair of product.
Low refrigerant levels may cause failure
of product.
Install the drain hose to ensure
that water is drained away properly.
A bad connection may cause water
leakage.
Keep level even when installing
the product.
To avoid vibration of water leakage.
Do not install the product where
the noise or hot air from the outdoor unit could
damage the neighborhoods.
It may cause a problem for your
neighbors.
Use two or more people to lift and
transport the product.
Avoid personal injury.
Do not install the product where it
will be exposed to sea wind (salt spray) directly.
It may cause corrosion on the product.
Corrosion, particularly on the condenser and
evaporator fins, could cause product malfunction or
inefficient operation.
¾ Operational
Do not expose the skin directly to
cool air for long periods of time. (Do not sit in t he
draft).
This could harm to your health.
Do not use the product for special
purposes, such as preserving foods, works of art,
etc. It is a consumer air conditioner, not a
precision refrigerant system.
There is risk of damage or loss of
property.
Do not block the inlet or outlet of
air flow.
It may cause product failure.
Use a soft cloth to clean. Do not
use harsh detergents, solvents, etc.
There is risk of fire, electric shock, or
damage to the plastic parts of the product.
Do not touch the metal p art s of the
product when removing the air filter. They are
very sharp.
There is risk of personal injury.
Do not step on pr put anything on
the product. (outdoor units)
There is risk of personal injury and failure
of product.
Always insert the filter securely.
Clean the filter every two weeks or more often if
necessary.
A dirty filter reduces the efficiency of the
air conditioner and could cause product malfunction
or damage.
Do not insert hands or other
object through air inlet or outlet while the
product is operated.
3
There are sharp and moving parts that
could cause personal injury.
Do not drink the water drained
from the product.
It is not sanitary could cause serious
health issues.
Use a firm stool or ladder when
cleaning or maintaining the product.
Be careful and avoid personal injury.
Replace the all batteries in the
remote control with new ones of the same type.
Do not mix old and mew batteries or different
types of batteries.
There is risk of fire or explosion.
Do not recharge or disassemble
the batteries. Do not dispose of batteries in a fire.
They may burn of explode.
If the liquid from the batteries gets
onto your skin or clothes, wash it well with clean
water. Do not use the remote of the batteries
have leaked.
The chemical in batteries could cause
burns or other health hazards
4
2. Function
Indoor unit
When the power supply is interrupted
and then restore, the air conditioners
automatically restore the previous
function setting.
Maintain the room temperature in accordance with the
setting temperature.
The mode can be change by the room temperature.
The louver can be set at the desired position or
swing up and down automatically
The function is usually used in rainy days in
springtime or damp areas.
The fan is turn to low speed (cooling/heating).
The unit will be turn off at the seventh hour.
The unit will decide the louver direction according to
operation mode.
Turbo wind, high, med, low, breeze.
Restarting is for approx. 3 minutes..
Prevent the water being frozen on evaporator by sensing the
evaporator pipe temperature in cooling mode
Room temperature sensor.
Pipe temperature sensor.
Operation by remote controller
Sensing by room temperature
Room temperature control
Anti-freezing control in cooling
Time Delay Safety control
Indoor fan speed control
Two-direction air vane
Sleep mode auto control
Independent dehumidification
Air flow Direction control
Auto mode
Temp. Compensation
Flexible wiring connection
Auto defrost
Anti-cold function
Self-diag. function
Auto-restart function
Timer function
Ionizer (Optional)
Prevent the cold wind at the
beginning of unit start.
5
It protects the valves and prevents water from dripping.
The unit has 3 mins delay between continuously ON/OFF operations.
Outdoor unit
Power relay control
The hydrophilic fin can improve the heating efficiency at operation mode.
Hydrophilic aluminum fin
It is only operated in the heating operation mode except defrosting operation.
Anti-rust cabinet
Valve protection cover
4 way valve control
Made from electrolytic zinc steel sheet and anti-rust coated components.
Low noise air flow system
Bird tail propeller fan makes the outdoor unit run more quietly.
Discharge pipe temperature protect
Driving heating at -15
6
3. Dimension
3.1 Indoor Unit
MSC-24/QD FP
MSH-24/QD FP
7
3.2 Outdoor Unit
MSC-24/QD FP
8
4. Specification
Indoor MSC-24/QD FP MSH-24/QD FP
Outdoor MSC-24/QD FP MSC-24/QD FP
Power supply
P
1,220-240V~,50Hz 1,220-240V~,50Hz
Capacity
B
23000(12000~250 23000(12000~250
Input
W
1970(820~2500) 1970(820~2500)
Rated current
A
8.9(3.6~11.2) 8.9(3.6~11.2)
Cooling
EER
W
3.42 3.42
Capacity
B
26500(12000~280 26500(12000~280
Input
W
2090(820~2800) 2090(820~2800)
Rated current
A
9.3(3.6~12.5) 9.3(3.6~12.5)
Heating
COP
W
3.72 3.72
Moisture Removal
L
2.4 2.4
Max. input consumption
W
2950 2950
Max. current
A
13.5 13.5
Starting current
A
12 12
Model DA150S1C-20FZ DA150S1C-20FZ
Type Twin-rotary DC inverte
r
Twin-rotary DC inverte
r
Brand Toshiba Toshiba
Capacity
B
15286 15286
Input
W
1150 1150
Rated
A
9.7 9.7
Thermal protecto
r
KSD301 KSD301
Capacitor
u
No No
Compress
or
Refrigerant oil
m
500 500
Model YDK36-4C(A) YDK36-4C(A)
Brand Welling Welling
Input
W
72/70/54/50 72/70/54/50
Capacitor
u
33
Indoor fan
motor
Speed(hi/mi/lo)
r
1260/1210/1020/950 1260/1210/1020/950
Indoor air flow (Hi/Mi/Lo)
m
1150/1080/960 1150/1080/960
Indoor noise level (Hi/Mi/Lo)
d
48/45/41 48/45/41
Dimension
m
1080*330*225 1080*330*235
Packing
m
1165*445*320 1165*445*320
Indoor unit
Net/Gross weight
K
15.5/20.5 15.5/20.5
Model YDK53-6N YDK53-6N
Brand Welling Welling
Input
W
144/102 144/102
Capacitor
u
2.5 2.5
Outdoor
fan motor
Speed
r
780/600 780/600
Outdoor air flow
m
3000/2200 3000/2200
Outdoor noise level
d
58 58
Dimension(W*H*
m
895*860*330 895*860*330
Packing
m
1043*915*395 1043*915*395
Outdoor
unit
Net/Gross weight
K
63.5/67.5 63.5/67.5
Refrigerant type R410A
g
1900 1900
Liquid side/ Gas
m
Ф9.52/Ф16.0 Ф9.52/Ф16.0
Max. refrigerant
m
25 25
Refrigeran
t piping
Max. difference in
m
10 10
Operation temp
17 ~ 30 17 ~ 30
Ambient temp in cooling mode
0 ~ 50 0 ~ 50
Ambient temp in heating mode
-15 ~ 34 -15 ~ 34
The above design and specifications are subject to change without prior notice for product improvement.
9
5. Refrigerant cycle diagram
10
6. Wiring diagram
6.1 Indoor Unit
MSC-24/QD FP MSH-24/QD FP
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