Bosch BMS500-AAU009-0AHXXA User manual

Bosch Split-Type Ductless Air Conditioner / Heat Pump
Climate 5000 AA Series
Service Manual

2
|Bosch Climate 5000 AA Series Split Type Ductless Air Conditioner / Heat Pump Service Manual
02.2018 |Bosch Thermotechnology Corp.
Data subject to change

Service Manual Bosch Climate 5000 AA Series Split Type Ductless Air Conditioner / Heat Pump | 3
Bosch Thermotechnology Corp. |02.2018 Data subject to change
TableofContents
1 Key to Symbols and Safety Instructions 4
1.1 Keytosymbols 4
1.2 Safety 4
2 Part Names and Model Numbers 6
2.1 Modelnumbers 6
2.2 Unitparts 6
3 Dimensions 7
3.1 Indoorunit 7
3.2 Outdoor unit 9
4 Refrigerant Cycle Diagram 10
5 Wiring Diagram 12
6 Installation Details 12
6.1 Wrench torque sheetforinstallation 12
6.2 Connectingthecables 12
6.3 Pipelengthandtheelevation 12
6.4 Firsttimeinstallation 12
6.5 Addingthe refrigeranttoanexistingsystem 13
6.6 Re-installation/indoorunitneedstobe repaired 13
6.7 Re-installationwhiletheoutdoor unit needstoberepaired 14
6.8 Operationcharacteristics 15
7 Electronic Functions 16
7.1 Abbreviation 16
7.2 Displayfunction 16
7.3 Mainprotection 16
7.4 Operationmodesandfunctions 17
8 Troubleshooting 22
8.1 Indooruniterrordisplay 23
8.2 Outdooruniterrordisplay 24
8.3 Diagnosisand solution 28
9 Disassembly Guide 50
9.1 Indoorunit 50
9.2 Outdoorunit 55
10 Care and Maintenance 70
10.1 Cleaningprecautions 70
10.2 Cleaningyourair Àlter 70
10.3 AirÀlterreminders(optional) 71
10.4 Maintenance–longperiodsof non-use 71
10.5 Maintenance –pre-season inspection 71

4
|Bosch Climate 5000 AA Series Split Type Ductless Air Conditioner / Heat Pump Service Manual
02.2018 |Bosch Thermotechnology Corp.
Data subject to change
1 KeytoSymbolsandSafety Instructions
1.1 Keytosymbols
Warnings
Warnings in this document are identified by a
warning triangle printed against a grey background.
Keywords at the start of a warning indicate the type and seriousness
of the ensuing risk if measures to prevent the risk are not taken.
The following keywords are defined and can be used in this document:
fDANGER indicates a hazardous situation which, if not avoided, will result
in death or serious injury.
fWARNINGindicates a hazardous situation which, if not avoided, could
result in death or serious injury.
fCAUTION indicates a hazardous situation which, if not avoided, could
result in minor to moderate injury.
fNOTICEis used to address practices not related to personal injury.
Importantinformation
This symbol indicates important information where
there is no risk to people or property.
1.2 Safety
Pleasereadsafetyprecautionsbeforeinstallation
WARNING:
fThe information contained in the manual is intended for
use by a qualified service technician familiar with safety
procedures and equipped with the proper tools and test
instruments.
fRepairs made by unqualified persons can result in hazards to
you and others.
WARNING:
fDo not modify the length of the signal/power cable or use an
extension cord to power the unit.
fDo not share the electrical outlet with other appliances.
Improper or insufficient power supply can cause fire or
electrical shock.
WARNING:
fWhen connecting refrigerant piping, do not let substances or
gases other than the specified refrigerant enter the unit. The
presence of other gases or substances will lower the unit’s
capacity, and can cause abnormally high pressure in the
refrigeration cycle. This can cause explosion and injury.
WARNING:
fInstallation MUST conform with local building codes or, in
the absence of local codes, with the National Electrical Code
NFPA70/ANSI C1-1993 or current edition and Canadian
Electrical Code Part1 CSA C.22.1.
WARNING:
fFailure to carefully read and follow all instructions in this
manual can result in equipment malfunction, property
damage, personal injury and/or death.

Service Manual Bosch Climate 5000 AA Series Split Type Ductless Air Conditioner / Heat Pump | 5
Bosch Thermotechnology Corp. |02.2018 Data subject to change
WARNING:ELECTRICAL
fFor all electrical work, follow all local and national wiring
standards, regulations, and the Installation Manual.
The power supply to the outdoor unit requires a service
disconnect at the unit. Only use a dedicated circuit. Never
share a power source connected to this system. Insufficient
electrical capacity or defects in electrical work can cause
electrical shock or fire.
fFor all electrical work, use the specified cables. Connect
cables tightly, and clamp them securely to prevent external
forces from damaging the terminal. Improper electrical
connections can overheat and cause fire, and may also cause
shock.
fAll wiring must be properly arranged to ensure that the
control board cover can close properly. If the control board
cover is not closed properly, it can lead to corrosion and
cause the connection points on the terminal to heat up, catch
fire, or cause electrical shock.
fIf the power supply cord is damaged, it must be replaced
by the manufacturer, its service agent or similarly qualified
persons such as a licensed electrician in order to avoid a
hazard.
fThe product must be properly grounded at the time of
installation, or electrical shock may occur.
WARNING:
fDo not install unit in area of high heat such as kitchen, server
rooms, etc.
CAUTION:
fFor units that have an auxiliary electric heater, do not install
the unit within 1 meter (3 feet) of any combustible materials.
fDo not install the unit in a location that may be exposed
to combustible gas leaks. If combustible gas accumulates
around the unit, it may cause fire.
fDo not operate your air conditioner in a wet room such as a
bathroom or laundry room. Too much exposure to water can
cause electrical components to short circuit.
CAUTION:
fInstall condensate drainage piping according to the
instructions in this manual. Improper condensate drainage
may cause water damage to your home and property.
NOTICE:FLUORINATEDGASSES [REFRIGERANT]
fThis air-conditioning unit contains fluorinated gasses. For
specific information on the type of gas and the amount,
please refer to the relevant label on the outdoor unit itself.
fInstallation, service, maintenance and repair of this unit must
be performed by a certified technician.
fProduct removal and recycling must be performed by a
certified technician.
fIf the system has a leak-detection system installed, it must be
checked for leaks at least every 12 months.
fWhen the unit is checked for leaks, proper record-keeping of
all checks is strongly recommended.
NOTICE:FLUORINATEDGASSES [REFRIGERANT]
fAir and moisture in the refrigerant system have undesirable
effects as below:
—Pressure in the system rises.
—Operating current rises.
—Cooling or heating efficiency drops.
—Moisture in the refrigerant circuit may freeze and block
capillary tubing.
—Water may lead to corrosion of parts in the refrigerant
system. Therefore, the indoor units and the pipes
between indoor and outdoor units must be leak tested
and evacuated to remove gas and moisture from the
system.

6
|Bosch Climate 5000 AA Series Split Type Ductless Air Conditioner / Heat Pump Service Manual
02.2018 |Bosch Thermotechnology Corp.
Data subject to change
2 PartNamesandModelNumbers
2.1 Modelnumbers
Capacity Voltage Indoor Units Outdoor Units
9k 115V BMS500-AAU009-0AHXXA BMS500-AAS009-0CSXXA
12k 115V BMS500-AAU012-0AHXXA BMS500-AAS012-0CSXXA
9k 208-230V BMS500-AAU009-1AHXXA BMS500-AAS009-1CSXXA
12k 208-230V BMS500-AAU012-1AHXXA BMS500-AAS012-1CSXXA
18k 208-230V BMS500-AAU018-1AHXXA BMS500-AAS018-1CSXXA
24k 208-230V BMS500-AAU024-1AHXXA BMS500-AAS024-1CSXXA
Table 1
2.2 Unitparts
Figure 1
Wall Mounting Plate
Refrigerant Piping
(Sold Separately)
Signal/power Cable
(32ft cable included with indoor unit)
Remote Control
Drainage Pipe
Louver
Remote Holder
Front Panel
Outdoor Unit
Power Cable
(Required, not included with unit)
Air filter
(pull it out)

Service Manual Bosch Climate 5000 AA Series Split Type Ductless Air Conditioner / Heat Pump | 7
Bosch Thermotechnology Corp. |02.2018 Data subject to change
3 Dimensions
3.1 Indoorunit
Figure 2
Model W x D x H (mm) W x D x H (inch) Mounted plate
BMS500-AAU009-0AHXXA
805 x 193 x 302 31.69 x 7.60 x 11.89 B
BMS500-AAU012-0AHXXA
BMS500-AAU009-1AHXXA
BMS500-AAU012-1AHXXA
BMS500-AAU018-1AHXXA 1106 x 232 x 342 43.54 x 9.13 x 13.46 D
BMS500-AAU024-1AHXXA
Table 2

8
|Bosch Climate 5000 AA Series Split Type Ductless Air Conditioner / Heat Pump Service Manual
02.2018 |Bosch Thermotechnology Corp.
Data subject to change
Figure 3
31.7" (805mm)
16.8" (427.9mm)
8.8" (224.6mm)
6.5"(163mm)
11.9" (302mm)
Right rear wall hole
2.5" (65mm)
4.5"
(113mm)
4.4"
(112mm)
2.1" (53mm)
5.1"
(128mm)
1.5"
(39mm)
2.1" (53mm)
Left rear wall hole
2.5" (65mm)
1.1" (27mm)
Indoor unit outline
For mount plate B
Figure 4
43.5" (1106mm)
23.6" (598.4mm)
12.5" (319.5mm)
8.9"(228mm)
1.7" (45mm)
13.5" (342mm)
Right rear wall hole
2.5" (65mm)
7.4"(189mm)
12.5"(319.5mm)
8.9"(227.8mm)
2.1"
(53.7mm)
Left rear wall hole
2.5" (65mm)
1.7" (45mm)
Indoor unit outline
For mount plate D

Service Manual Bosch Climate 5000 AA Series Split Type Ductless Air Conditioner / Heat Pump | 9
Bosch Thermotechnology Corp. |02.2018 Data subject to change
3.2 Outdoorunit
Figure 5
More than 60cm(23.6in)
More than 70cm(27.6in)
More than 30cm(11.8in)
More than 60cm(23.6in)
(Service space)
Fence or
obstacles
More than 30cm(11.8in)
Outdoor unit clearances
Figure 6 Outdoor unit dimensions
Model W D H W1 A B
BMS500-AAS009-0CSXXA 30.31 (770) 11.81 (300) 21.85 (555) 33.07 (840) 19.17 (487) 11.73 (298)
BMS500-AAS009-1CSXXA
BMS500-AAS012-0CSXXA 31.50 (800) 13.11 (333) 21.81 (554) 34.25 (870) 20.24 (514) 13.39 (340)
BMS500-AAS012-1CSXXA
BMS500-AAS018-1CSXXA 33.27 (845) 14.29 (363) 27.64 (702) 35.98 (914) 21.26 (540) 13.78 (350)
Table 3 Outdoor unit dimensions in inches (mm)

10
|Bosch Climate 5000 AA Series Split Type Ductless Air Conditioner / Heat Pump Service Manual
02.2018 |Bosch Thermotechnology Corp.
Data subject to change
4 RefrigerantCycleDiagram
Forindoormodels:
BMS500-AAU009-0AHXXA,BMS500-AAU012-0AHXXA,
Foroutdoormodels:
BMS500-AAS009-0CSXXA,BMS500-AAS012-0CSXXA
Figure 7
LIQUID SIDE
GAS SIDE
HEAT
EXCHANGER
COMPRESSOR
LIQUID
SERVICE
VALVE
REVERSING
VALVE
REFRIGERANT
FLOW IN
COOLING
T2 Evaporator
temp. sensor
T1 Room temp.
sensor
ACCUMULATOR
INDOOR OUTDOOR
CHECK VALVE
(Heating Model only)
CAPILIARY TUBE
GAS
SERVICE
VALVE
REFRIGERANT
FLOW IN
HEATING
HEAT
EXCHANGER
Refrigerant cycle diagram