Trane 09CO-FIXED-A1 User manual

Air Conditioner Service Manual
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Service Manual
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Models
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TRANE-09CO-FIXED-A1
TRANE-12CO-FIXED-A1
TRANE-18CO-FIXED-A1
TRANE-24CO-FIXED-A1
TRANE-09CH-FIXED-A1
TRANE-12CH-FIXED-A1
TRANE-18CH-FIXED-A1
TRANE-24CH-FIXED-A1
WALL MOUNTED SPLIT-TYPE AIR CONDITIONERS

Air Conditioner Service Manual
CONTENTS
Part ⅠTechnical Information…………………………………...….………… 2
1. Important Notice……………………………………………………..………..2
2. Production Dimensions……………………………………………………….3
3. Refrigeration cycle diagram…………………………………..……………...4
4. Wiring Diagram………………………………………………………………..5
5. ElectronicController Introduction…………………………………….……...9
PART ⅡInstallation and Maintenance……………..…….……….…………16
1. Notes for installation and maintenance.………………..…………………..16
2. Installation…………………………………………………..………………….24
3. Maintenance………………………………………………………..…….……31
4. Exploded view and parts list…………………………..……………………..35
5. Disassembly IDU & ODU …………………………………………………….36
APPENDIX
1. The comparison table of CELSIUS-FAHRENHEIT temperature…….......45
2. The Pipe length and Gas charging………………………………….……....45
3. Pipe Flaring………………………………………………………..…………...46
4. The Thermistor Temperature Characteristics……………………………….47
1

Part ⅠTechnical Information
1. ,PSRUWDQW1RWLFH
This service manual is intended for use by individuals possessing adequate
backgrounds of electrical, electronic and
mechanical experience. Any attempt to repair the appliance may result in personal injury and property damage.
The manufacturer or seller cannot be responsible for the interpretation of this information, nor can it assume
any liability in connection with its use.
The information, specifications and parameter are subject to change due to
technical modification or improvement
without any prior notice. The accurate specifications are presented on the nameplate label.
2

2. Product Dimensions
Indoor Unit:
Outdoor Unit:
Air Conditioner Service Manual
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Model Indoor unit Outdoor unit
A B C D E F G H I J K
TRANE‐09CO‐FIXED‐A1777201250 787 498 290 415 291 225 48.5 52
TRANE‐12CO‐FIXED‐A1811 203 292 787 498 290 415 291 225 48.5 52
TRANE‐18CO‐FIXED‐A1910 206 863 602 349 518 357 329 55 63 63
TRANE‐24CO‐FIXED‐A11010 220 315 890 605 357 518 357 329 55 63
TRANE‐09CH‐FIXED‐A1777201250 787 498 290 415 291 225 48.5 52
TRANE‐12CH‐FIXED‐A1811 203 292 787 498 290 415 291 225 48.5 52
TRANE‐18CH‐FIXED‐A1910 206 863 602 349 518 357 329 55 63 63
TRANE‐24CH‐FIXED‐A11010 220 315 890 605 357 518 357 329 55 63
3

Air Conditioner Service Manual
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3. Refrigeration cycle diagram
Cooling only
Heat pump
Capillary
Compressor
Accumulator
Heat exchange
(condenser)
Heat exchange
(Evaporator)
2-way valve
Liquid side
3-way valve
Gas side
Cooling
Heating
Gas side
3-way valve
Liquid side
2-way valve
Heat exchange
(Evaporator)
Heat exchange
(condenser)
Accumulator
Compressor
4-way valve
Capillary Assembly
Check valve
4

. Wiring diagram
MODEL: 75$1(&2),;('$75$1(&2),;('$75$1(&2),;('$
INDOOR UNIT
OUTDOOR UNIT
Air Conditioner Service Manual
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MODEL: 75$1(&2),;('$
INDOOR UNIT
Air Conditioner Service Manual
OUTDOOR UNIT
6

Air Conditioner Service Manual
MODEL: 75$1(&+),;('$75$1(&+),;('$75$1(&+),;('$
INDOOR UNIT
OUTDOOR UNIT
7

Air Conditioner Service Manual
MODEL: 75$1(&+),;('$
INDOOR UNIT
OUTDOOR UNIT
8

Note: Each mode and relevant function will be further specified in following pages.
Remote controller
1
2
4
3
5
6
9
7
MODE button
FAN SPEED button
TEMP UP button
TIMER button
SLEEP button
To select the mode of operation.
To switch the conditioner on and off.
To select the fan speed of auto/low/mid/high.
To set automatic switching-on/off.
Crease the temperature or time by 1 unit.
To activate the function SLEEP .
Air Conditioner Service Manual
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Remote Control
The remote controller is not presetting as Cooling Only Air Conditioner or Heat Pump by manufacturer.
Each time after the remote controller replace batteries or is energized, the arrowhead will flashes on the
front of Heat or Cool on LCD of the remote controller.
User can preset the remote controller type depending on the air conditioner type you have purchased as
follows:
Press any button when the arrowhead flashes on the front of Cool , Cooling Only is set.
Press any button when the arrowhead flashes on the front of Heat , Heat Pump is set.
If you don t press any button within 10 seconds, the remote controller is preset as Heat Pump
automatically.
Note :
If the air conditioner you purchased is a Cooling Only one, but you preset the remote controller as Heat
Pump, it doesn t bring any matter. But if the air conditioner you purchased is a Heat Pump one, and you
preset the remote controller as Cooling Only, then you CAN NOT preset the Heating operation with the
remote controller.
8
DISPLAY button
In cooling mode, press this button, the unit will give
the maximum cooling temperature with 16
In heating mode, press this button, the unit will give
the maximum heating temperature with 31 .
9
SWING button
10
To activate or deactivate of the movement of the
DEFLECTORS .
12
HEALTH button
9
3
4
2
1
8
5
6
79
10
11
9
ON/OFF button
11
To LED display (if present)switch on/off the
12
TURBO button
Mildew button
To switch - on /off HEALTHY funtion. It is a button
which controls the ionizer or plasma generator only
for inverter type.
ECO button
In cooling mode,press this button ,the temperature
will increase 2 on the base of setting temperature:
In heating mode, press this button, the temperature
will decrease 2 on the base of setting temperature.
Mute indicator
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9

Remote controller DISPLAY
Meaning of symbols on the liquid crystal display.
1
or or AUTO
FEEL mode indicator
2
or COOL
COOLING indicator
3
or or DRY
DEHUMIDIFYING indicator
4
or FAN
FAN ONLY OPERATION indicator
5
or HEAT
HEATING indicator
6
or
SIGNAL RECEPTION indicator
7
or or or
TIMER OFF indicator
8
or or or or
TIMER ON indicator
9
or or or
AUTO FAN indicator
10
or or or or or
LOW FAN SPEED indicator
11
or or or or or
MIDDLE FAN SPEED indicator
12
or or or or
HIGH FAN SPEED indicator
13
or or or
SLEEP indicator
14
COMFORTABLE SLEEP indicator (optional)
15
FEEL indicator(optional)
16
or or or
FLAP SWING indicator
17
FLAP and Deflectors SWING indicator
18
or TURBO or POWERFUL
SUPER indicator
19
or or
HEALTHY indicator
20
or ECO or
ECO indicator
21
ANTI-MILDEW indicator
22
or or
BATTERY indicator
23
CLOCK indicator
24
Mute indicator
25
Optional functions indicator
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5.2 Electronic controller
RT-------Room Temperature.
IPT------Indoor Pipe (Coil) Temperature.
ST------Indoor Setting Temperature.
OPT--- Outdoor Pipe Temperature.
CRT--- Compensated Room Temperature.
IDU--- Indoor unit
ODU--- Outdoor unit.
Note: WhenAC finishing installation, because of the air ventilation and the distance of temperature test sensor to
different location of the house, the temperature for IDU PCB control need compensation.
1）. Cooling mode. CRT=RT;
2）. Heating mode. CRT=RT-3℃----- Split AC.
5.2.1 Auto mode
5.2.1.1. The set temperature can be adjusted from 16-31℃(61-88℉) on auto mode, the operation of fan speed and vane
position according to preset.
5.2.1.2. Operation
When unit set to auto mode, it will work on cooling, heating or fan mode totally according to Δt --the temperature
difference between RT and ST shown as table:
Mode
Δt=RT-ST
COOLING
Δt >1℃
FAN
-1℃≤Δt≤1℃
HEATING
Δt <-1℃
5.2.2 Cooling mode
5.2.2.1. Temperature control :16-31℃(61-88℉), and the operation of fan speed and vane position according to preset.
5.2.2.2. Compressor and process control
1). When RT-ST≥1℃the compressor starts up working,AC operates as customer preset;
2). When:
a. RT-ST≥1℃, the compressor will start up operation once it stops 3 minutes, and unit without any other protection
or failure code.
b. RT-ST≤-1℃, the compressor will stop working while it works for 6 minutes or more continuously.
c. -1℃＜RT-ST＜1℃, the compressor keeps original state.
3). The compressor will also stop working while unit:
a. switched off.
b. under protection.
c. changed to fan mode.
4). Under normal operation, the compressor can be stopped by program until it works for 6 min at least once starts up.
5). In the process of unit operation, once the compressor ceased, it should be 3 min delay for the next procedure.
5.2.2.3. ODU Fan motor control:
1). While unit:
a. switched off.
b. under protection.
c. to the set temperature.
The compressor stops working, and the fan motor will stop operation after 50s delay.
2). When switch on unit on cooling mode, ODU fan motor will delay 5s after compressor starts up.
5.2.2.4. When ODU failure or stops for protection, IDU works as preset.
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5.2.2.5.Anti-frosting protection
While condition a), b) matched, the AC unit transferred to anti-frosting protection.
a). After the compressor continual works for 6 minutes, and tested IPT≤0℃for 3 minutes continuously.
b). After the compressor continual works 6 minutes, and tested IPT≤-2℃for 3 seconds continuously.
c). AC unit quit protection while IPT≥10℃.
5.2.3 Dry mode
5.2.3.1. Temperature control: 16~31℃.
Fan speed: low
Vane blade position: as customer preset
5.2.3.2. When ODU failure or stops for protection, IDU works as preset.
5.2.3.3. Compressor and process control
1). When RT-ST≥1℃, the compressor starts up working,AC operates as customer preset;
2). When
a. RT-ST＞2℃, the compressor will start up operation once it stops 3 minutes, and unit without any other protection
or failure code.
b. RT-ST＜-2℃, the compressor will stop working while it works 6 minutes or more continuously.
c.-2℃≤RT-ST≤ 2℃，the compressor will stop working while it works for 6minutes, after 4 minutes it will start working
again.
3). The compressor will also stop working while unit:
a. switched off.
b. under protection.
c. changed to fan mode.
4). Under normal operation, the compressor can be stopped by program until it works for 6 min at least once starts up.
5). In the process of unit operation, once the compressor ceased, it should be 3 min delay for the next procedure.
5.2.3.4. ECO and sleep mode: Invalid.
5.2.3.5. Anti-frosting protection
While any of condition a), b), or c) matched, the AC unit transferred to anti-frosting protection.
a). After the compressor continual works for 6 minutes, and tested IPT≤0℃for 3 minutes continuously.
b). After the compressor continual works 6 minutes, and tested IPT≤-2℃for 3 seconds continuously.
c). If the unit works as 6 minutes ON, 4 minutes OFF, and tested IPT≤0℃for 3 minutes continuously.
d). AC unit quit protection while IPT≥10℃.
5.2.4 Heating mode
5.2.4.1. Temperature control: 16-31℃(61-88℉).
5.2.4.2. Compressor and process control.
1). When ST-CRT≥1℃, the compressor starts up working,AC operates as customer preset;
2). When
a. ST-CRT≥1℃, the compressor will start up operation once it stops 3 minutes, and unit without any other protection
or failure code.
b. ST-CRT≤-1℃，the compressor will stop working while it works 6 minutes or more continuously.
c. -1℃＜ST-CRT＜1℃，the compressor keeps original state.
3). The compressor will also stop working while unit:
a. switched off.
b. under protection.
c. changed to fan mode.
4). Under normal operation, the compressor can be stopped by program until it works for 6 min at least once starts up.
5). In the process of unit operation, once the compressor ceased, it should be 3 min delay for the next procedure.
5.2.4.3. IDU time delay: When compressor stops or unit switches off while in heating mode, IDU fan motor keeps
working for 50 seconds.
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5.2.4.4. ODU Fan motor control:
1). While unit:
a. To be switched off
b. Under protection.
c. To the set temperature
The compressor stops working, and the fan motor will stop operation after 50s delay.
2). When switch on unit on heating mode, ODU fan motor will start up 3s earlier before compressor starts up.
3). In the process of defrosting, the fan motor will stop operation 39s delay after compressor stopped.
4). defrosting finish, the compressor stops operation, the fan motor will start working simultaneously.
5.2.4.5. 4-way valve control
1). On Cooling/Dry/Fan mode,4-way valve: OFF,
when unit switched on heating mode,4-way valve: ON.
2). When heating mode switched off, or changed from heating to other modes, the 4-way valve will be OFF 2 min
delay after the compressor stops working.
3). The 4-way valve will be OFF 2 min delay while unit stops working caused by any kinds of protection.
4). In the process of defrosting, 4-way valve will be OFF 39s delay after compressor stopped.
5). When defrosting finish, the compressor stops operation, 4-way valve will be ON after 20s delay.
5.2.4.6. Defrost
Note:
t1: The compressor continuous works time.
t2: The compressor accumulated working time.
t3: The tested max value of “IPT-RT” after compressor works for 8 minutes till to current.
△T: The current value of “IPT-RT” while compressor works. (the instantaneous value)
1). When AC unit works matching a), b) and c):
a. t1 ≥ 120 minutes,
b. t2 ≥ 45 minutes,
c. t3 ≥△T + 4℃.
it triggers to defrosting.
Defrosting start up: Compressor stops working, and re-starts operation after 44s delay;
2). AC unit quit defrosting automatically after 10 minutes operation.
Defrosting end off: Compressor stops working, and re-starts after 25s delay;
5.2.4.7. Cold air prevention:
This function intends to prevent cold air from being discharged when the heating operation starts up
1). IDU fan motor cold air prevention
①.When RT＜24℃:
a. If ITP＞31℃while compressor works for 5 min, fan motor will work according to preset fan speed.
b. If IPT≤31℃, fan motor stops workingwhile compressoroperation within 2min, if IPT≥27℃, fan motor works in low
speed 2 min, then change to preset speed.
②When RT≥24℃:
a. Within 2 min after compressor starts up working, once IPT＞27℃, fan motor will change to preset speed.
b. After compressor starts working 2 min, fan motor changes to preset speed directly.
2). Vane blade operation for cold air prevention.
a. If the vane works on status of non-swing: While IPT increase to a special degree, the vane blade will change the
position to:
①Default angle; or
②Previous position; or
③Customer preset.
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The above operation can work one time only, when compressorstops working, the unit will inspect the function once
again.
b. If the vane works on swing: When IDU quits from cold air prevention, vane operate as preset.
6.2.4.8. “8℃” Heating
When function effective, it will make sure the room temperature not lower than 8℃, unit works on heating mode.
5.2.5 Fan mode
5.2.5.1. The temperature setting: 16~31℃(61-88℉),
Fan speed and vane position: as preset. The function for remote controller 58E only.
5.2.5.2. For above function, when unit preset to auto fan mode, the fan motor will change its operation speedbased
on the temperature difference of ambient and preset temperature.
5.2.5.3. ODU always OFF.
5.2.6 Timer
The unit has times control, when the unit meet the timer preset, it will be switched on or off automatically.
5.2.6.1 TIMER ON
1). TIMER ON can be set only when the air conditioner is OFF.
2). Press TIMER on the remote control ONCE to enter time setting.
3). Press “▲” or “▼” to set the time for unit to start working.
4). Set other function as MODE, FAN SPEED, SWING etc.
5). Press TIMER ONCEAGAIN to confirm the TIME ON setting
5.2.6.2 TIMER OFF
1). TIMER OFF can be set only when the air conditioner is ON.
2). Press TIMER on the remote control ONCE to enter time setting.
3). Press “▲” or “▼” to set the time for unit to stop working.
4). Press TIMER ONCEAGAIN to confirm the TIME OFF setting
Note: In case of no selection for the time setting within 10s, the timer function will be OFF automatically.
5.2.7 Sleeping mode
While AC works in sleeping mode, the light of POWER SUPPLY and SLEEP always ON, and the temperature
display will be OFF after 15s.
In this mode, theAC unit works according to the SLEEP CURVE as designed.
Sleeping mode the unit can work 10 hours continuously, after that it will quit from this mode and work as
previous presetting.
5.2.8 Emergency switch
When the EMERGENCY switch is pressed one time, COOLING mode is selected and if it pressed again within
3s, HEATING mode selected, while press once again, the unit will be switched off.
When the remote controller out of function, batteries lost power, for example, the EMERGENCY button in the
front of indoor unit can be used for function test.
℃
4
2
0
δt comes down
δt goes up
High fan
Mid fan
Low fan
2℃
4℃
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NOTE: Do not press the EMERGEMCY switch during normal operation.
5.2.9 Auto-restart function
While air conditioner is operating in one mode, all of its operation data, such as working mode, preset
temperature etc. would be memorized into IC by main PCB. If power supply cut off due to reasons and recover
again, the AUTO-RESTART function will set synchronously and the air conditioner would work at the same
mode as before.
Note: The function setting:
Within 3 min while power on unit, set the unit on cooling mode, set temperature 30℃, and mid fan speed, press
the ECO button 10 times within 8s, the AUTO-RESTART will be activated.
5.2.10 Over heat protection for Heating mode
1). If:
a. IPT≥62℃, compressor and ODU Fan stop working for over heat protection.
b. IPT≥54℃, ODU Fan stops working. IDU fan motor and compressor keeps original state.
2). When IPT≤48℃, the compressor and ODU Fan restart works to quit overheat protection.
3). If unit have 6 times Overheat Stop-working Protection continuously, or tested IPT ≥ 62℃for 3mins
continuously while compressor stop working, this protection can’t be recovered unless press ON/OFF button,
and unit will show failure code “P7”.
Note:
In the process of operation, once the compressor runs continuously more than 6 min, the counter of overheat
stop-working protection will be reset to zero and start a new counting process.
The failure and times for protection will eliminate immediately once the unit to be switched off, on fan mode or
changed to be heating mode from others.
5.2.11 Complementary
5.2.11.1 Energy saving (ECO)
Function effective on Cooling and Heating mode only.
On cooling mode, the set temperature range from 26℃(79℉) to 31℃(88℉).
on heating mode, from 16℃(61℉) to 25℃(77℉).
5.2.11.2 TURBO
Function effective on Cooling, Heating, Fan andAuto modes, and fan speed operates on highest.
5.2.12 Calibration Test Mode:
Within 3 min while indoor unit switch on, and set the unit as:
1) Cooling mode.
2) set temperature to 30℃.
3) Mid-fan speed.
by press ECO button 7 times within 8s, the unit will change to calibration test mode, and the buzzer sounds 3
times.
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PART ⅡInstallation and Maintenance
1. Notes for installation and maintenance
Safety Precautions
Important!
Please read the safety of precautions carefully before installation and maintenance. The following contents are
very important for installation and maintenance. Please follow the instructions bellow.
●The installation or maintenance must accord with the instructions.
●Comply with all national electrical codes and local electrical codes.
●Pay attention to the warnings and cautions in this manual.
●All installation and maintenance shall be performed by distributor or qualified person.
●All electric work must be performed by licensed technician according to local regulations and instructions given
in this manual.
●Be caution during installation and maintenance. Prohibit incorrect operation to prevent electric shock, casualty
and other accidents.
Warnings
Electrical safety Precautions.
1) Cut off the power supply of air conditioner before checking and maintenance.
2) The air conditioner must apply specialized circuit and prohibit share the same circuit with other appliances.
3) The air conditioner should be installed in suitable location and ensure the power plug is touchable.
4) Make sure each wiring terminal is connected firmly during installation and maintenance.
5) Have the unit adequately grounded. The grounding wire can’t be used for other purposes.
6) Must apply protective accessories such as protective boards, cable-cross loop and wire clip.
7) The live wire, neutral wire and grounding wire of power supply must be corresponding to the live wire, neutral
wire and grounding wire of the air conditioner.
8) The power cord and power connection wires can’t be pressed by hard objects.
9) If power cord or connection wire is broken, it must be replaced by qualified person.
10) If the power cord or connection wire is not long enough, please get the specialized power cord or connection
wire from the manufacture or distributor. Prohibit prolong the wire by yourself.
11) For the air conditioner without plug, an air switch must be installed in the circuit. The air switch should be all-
pole parting and the contact parting distance should be more then 3mm.
12) Make sure all wires and pipes are connected properly and the valves are opened before energizing.
13) Check if there is electric leakage on the unit body. If yes, please eliminate the electric leakage.
14) Replace the fuse with a new one of the same specification if it is burnt down, don’t replace it with a cooper
wire or conducting wire.
15) If the unit is to be installed in a humid place, the circuit breaker must be installed.
Installation Safety Precaution
1) Select the installation location according to the requirement of this manual. (See the requirements in
installation part).
2) Handle unit transportation with care, the unit should not be carried by only one person if it is more than 20kg.
3) When installing the indoor unit and outdoor unit, a sufficient fixing bolt must be installed, make sure the
installation supporter is firm.
4) Ware safety belt if the height of working is above 2m.
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5) Use equipped components or appointed components during installation.
6) Make sure no foreign objects are left in the unit after finishing installation.
Improper installation may lead to fire hazard, explosion, electric shock or
injury.
Safety precautions for Installing and Relocating the unit.
To ensure safety, please be mindful of the following precautions.
Warnings
1) When installing or relocating the unit, be sure to keep the refrigerant circuit free from air or substances other
than the specified refrigerant.
Any presence of air or other foreign substance in the refrigerant circuit will cause system pressure rise or
compressor rupture, resulting in injury.
2) When installing or moving this unit, do not charge the refrigerant which is not comply with that on the
nameplate or unqualified refrigerant.
Otherwise, it may cause abnormal operation, wrong action, mechanical malfunction or even series safety
accident.
3) When refrigerant needs to be recovered during relocating or repairing the unit, be sure that the unit is
running in cooling mode. Then, fully close the valve at high pressure side (two-way valve). About 30-40 seconds
later, fully close the valve at low pressure side (3-way valve), immediately stop the unit and disconnect power.
Please note that the time for refrigerant recover should not exceed 1 minute.
If refrigerant recovery takes too much time, may be cause compressor overheat, resulting in injury.
4) During refrigerant recovery, make sure that two-way valve and 3-way valve are fully closed and power is
disconnected before detaching the connecting pipe.
If compressor starts running when the valves is open and connecting pipe is not yet connected, air will be
sucked in and cause pressure rise and then compressor overheat or gas leak, resulting in injury.
5) When installing the unit, make sure that connecting pipe is securely connected before the compressor starts
running.
If compressor starts running when the valves is open and connecting pipe is not yet connected, air will be
sucked in and cause pressure rise and then compressor overheat or gas leak, resulting in injury.
6) Prohibit installing the unit at the place where there may be leaked corrosive gas or flammable gas.
If there leaked gas around the unit, it may cause explosion and other accidents.
7) Do not use extension cords for electrical connections. If the electric wire is not long enough, please contact
a local service center authorized and ask for a proper electric wire.
Poor connection may lead to electric shock or fire.
8) Use the specified types of wires for electrical connections between the indoor and outdoor units. Firmly
clamp the wires so that their terminals receive no external stresses.
Electric wires with insufficient capacity, wrong wire connections and insecure wire terminals may cause
electric shock or fire.
Introduction R32, R290 air conditioner installation
1) Introduction to Refrigerants R32 & R290
The refrigerants used for air conditioners are environmentally friendly hydrocarbons R32 and R290. The
two kinds of refrigerants are combustible and odorless. Moreover, they can burn and explode under certain
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condition. However, there will be no risk of burning and explosion if you comply with the following table to
install your air conditioner in a room with an appropriate area and use it correctly.
Compared with ordinary refrigerants, Refrigerants R32 & R290 are environmentally friendly and do not
destroy the ozone sphere and that their values of greenhouse effect are also very low.
2) R32/R290 air conditioner installation area requirement
m1=(4m3)×LFL, m2=(26m3) ×LFL, m3=(130m3) ×LFL
Where LFL is the lower flammable limit in kg/m3, R290 LFL is 0.038kg/m3, R32 LFL is 0.306kg/m3.
For the appliances with a charge amount m1<M<m2:
The maximum charge in a room shall be in accordance with the flowing: Mmax=2.5×(LFL)(5/4) ×h0×A1/2
The required minimum floor area Amin to install an appliance with refrigerant charge M(kg) shall be in
accordance with following: Amin= (M/ (2.5 x (LFL)(5/4) x h0)) 2
Where:
Mmax is the allowable maximum charge in a room, in kg;
M is the refrigerant charge amount in appliance, in kg;
Amin is the required minimum room area, in m2;
A is the room area, in m2;
LFL is the lower flammable limit, in kg/m3;
h0 is the installation height of the appliance, in meters for calculating Mmax or Amin, 1.8 m for wall mounted;
Table GG.1 - Maximum charge (kg)
Category
LFL
(kg/m3)
h0
(m)
Floor area (m2)
Maximum charge (kg)
4
7
10
15
20
30
50
R290
0.038
0.6
0.05
0.07
0.08
0.1
0.11
0.14
0.18
1
0.08
0.11
0.03
0.06
0.09
0.2
0.3
1.8
0.15
0.2
0.24
0.29
0.34
0.41
0.53
2.2
0.18
0.24
0.29
0.36
0.41
0.51
0.65
R32
0.306
0.6
0.68
0.9
1.08
1.32
1.53
1.87
2.41
1
1.14
1.51
1.8
2.2
2.54
3.12
4.02
1.8
2.05
2.71
3.24
3.97
4.58
5.61
7.254
2.2
2.5
3.31
3.96
4.85
5.6
6.86
8.85
Table GG.2 - Minimum room area (m2)
Category
LFL
(kg/m3)
h0
(m)
Charge amount (M) (kg)
Minimum room area (m2)
R290
0.038
0.152kg
0.228kg
0.304kg
0.456kg
0.608kg
0.76kg
0.988kg
0.6
/
82
146
328
584
912
1514
1
/
30
53
118
210
328
555
1.8
/
9
16
36
65
101
171
2.2
/
6
11
24
43
68
115
R32
0.306
1.224kg
1.836kg
2.448kg
3.672kg
4.896kg
6.12kg
7.956kg
0.6
/
29
51
116
206
321
543
1
/
10
19
42
74
116
196
1.8
/
3
6
13
23
36
60
2.2
/
2
4
9
15
24
40
Air Conditioner Service Manual
18

Caution:
Please contact the nearest after-sale service center when maintenance is necessary. At the time of
maintenance, the maintenance personnel must strictly comply with the Operation Manual provided by
the corresponding manufacturer and any non-professional is prohibited to maintain the air conditioner.
It is necessary to comply with the provisions of gas-related national laws and regulations.
It is necessary to clear away the refrigerant in the system when maintaining or scrapping an air
conditioner.
When filling the combustible refrigerant, anyof yourrude operations maycause serious injury or injuries
to human body or bodies and object or objects.
A leak test must be done after the installation is completed.
It is a must to do the safety inspection before maintaining or repairing an air conditioner using
combustible refrigerant in order to ensure that the fire risk is reduced to minimum.
3) Installation Safety
Installation Safety Principles
Site Safety
Open Flames Prohibited Ventilation Necessary
Operation Safety
Open Flames Prohibited
Mind Static Electricity Must wear protective clothing and anti-static gloves Don`t use mobile phone
Installation Safety
Caution:
The installation should be in a well-ventilated condition location.
When you installing or maintaining an air conditioner using Refrigerant R32/R290, the location should
be free fire from open or any other goods temperature higher than 370℃for R290/548℃for R32 which
easily produces open fire include welding, smoking, drying oven.
When installing an air conditioner of R32/R290, it is necessary to take appropriate anti-static measures
such as wear anti-static clothing and gloves.
It is necessary to choose the location for installation or maintenance where in the air inlets and outlets
of the indoor and outdoor units should be not surrounded by obstacles or close to any heat source or
Refrigerant Leak Detector
Appropriate Installation
Location
The left picture is the schematic diagram of a refrigerant leak
detector.
Air Conditioner Service Manual
19