Toshiba MAR - M81HTM8 - E User manual

SERVICE MANUAL
AIR CONDITIONER
HEAT PUMP MULTI SPLIT (2-PIPE)
Outdoor Units
MAR - M81HTM8 - E
MAR - M101HTM8 - E
Multi Controllers
RBM - Y1032E - E
RBM - Y1042E - E
TOSHIBA
AUGUST 1997 Page 1

Contents
1. Specifications Outdoor Unit
Multi Controller
2. Basic Permutations / Capabilities
3. Dimensional Views Outdoor Unit
Multi Controller
4. Wiring Diagrams Outdoor Unit
Multi Controller
5. Refrigeration Circuit Outdoor Unit
Multi Controller
6. Display Information and Fault Codes
7. Circuit Test Procedure
8. Calculation for Additional Gas Charge
Note : The two pipe Super Multi systems are heat pump units and can
provide heating or cooling, where both modes are required simultaneously
heating mode takes priority.
TOSHIBA
AUGUST 1997 Page 2

1. Specifications
OUTDOOR UNITS
RBM-Y1042E-E4 - Way RBM-Y1032E-E3 - WayMulti Controllers
Silky Grey (Munsell 6Y7.0/0.3)
Colour 10,000
m³/hrAir Flow Rate 2 x 150
WFan Motor Consumption 2 x Propeller Fan (two speed)
Fan Type 7.55.6kWCompressor Output Hermetically Sealed Twin Scroll
Compressor Type 18.615.6KgStd Refrigerant Weight R 22Refrigerant Type 20Outdoor Below (m) 50Outdoor Above (m)Height Difference 120mMax.. Length Equiv. 100mMax.. Length Actual 1/2Inch(sub) 5/8InchLiquid Pipe (main) 3/4Inch(sub) 1 1/8InchGas Pipe (main) -5 / -10Cooling / Heating ºCMin Temp. (ambient)66dB(A)Noise Level SPL 315308kgWeight 824Depth (mm) 1,290Width (mm) 1,490Height (mm)Dimensions 60AmpsStart Current 15.7 / 15.012.3 / 11.7(C/H) AmpsRunning Current 10.1 / 10.18.0 / 7.7(C/H) kWPower Consumption 3ph,380/415v,50HzPower Supply 25.0 (31.5)20.0 (25.0)kWHeating Capacity 25.0 (28.0)20.0 (22.4)kWCooling Capacity MAR-M101HTM8-EMAR-M81HTM8-EModel
Note: The capacity value in brackets is the maximum operating capacity
Cooling and Heating capacities are based on JIS B8615
Cooling capacity: Room Temperature 27ºC DB
19.5ºC WB
Ambient Temperature 35ºC DB
Heating capacity: Room Temperature 21ºC DB
Ambient Temperature 7ºC DB
6ºC WB
Usable outdoor temperature ranges
Cooling mode -5ºC to +43ºC DB
Heating mode -10ºC to +21ºC DB
Specifications are subject to change without prior notice.
TOSHIBA
AUGUST 1997 Page 3

1. Specifications
MULTI CONTROLLERS
1010mMax.. Difference between
Sub Pipes
1515mMax.. Sub Pipe Length (each)
Where two M/C are used 1515mMax.. Vertical Separation
1010mMax.. Difference between
Branches
3030mMax.. Branch Length 2320kgWeight
520450Depth (mm)
590590Width (mm) 260260Height (mm)Dimensions 3/8 x 43/8 x 3InchBranch Pipes (Liquid) 3/4 x 43/4 x 3InchBranch Pipes (Gas) 5/85/8InchLiquid Pipe (Inlet) 1 1/81 1/8InchGas Pipe (Inlet) 43Number of Branches RBM-Y1042E-ERBM-Y1032E-EModel
Specifications are subject to change without prior notice.
Pipe Size Conversion Chart
1.1/817/83/45/81/23/81/4inch 28.625.422.41915.912.79.56.4mm
TOSHIBA
AUGUST 1997 Page 4

2. Basic Permutations of Indoor to Outdoor Units
The indoor units are given a code number according to their capacity rank - see below
10RAV1253/460/1/2/3 8RAV1003/360/1/2/3 6RAV713/260/1/2/3 5RAV202/34RAV453/160/1/2/3 3RAV132/133 2RAV103 Code NumberModel Number
Multiple indoor units may be connected to one outdoor unit, providing the total indoor code does not
exceed the outdoor unit code number. The outdoor unit codes are listed below
2738MAR-M101HTM8-E 2138MAR-M81HTM8-E Max. CodeMin CodeMax.. No. Indoor UnitsModel
When connecting up to four single indoor units only one multi controller is required, if more single
indoor units are needed then two multi controllers must be used. When connecting a twin indoor
arrangement to one multi controller branch the capacity code will be the sum of both indoor unit
codes.
Example :
24Total 105TwinRAV202KH(W) 55SingleRAV202KH(W) 63TwinRAV133TUH 33SingleRAV133TUH Total Capacity CodeIndoor Capacity CodeArrangementModel No.
The total capacity codes for the example above are within the maximum permitted for a 10hp
(MAR-F101HTM8-E)outdoor unit therefore the use of a twin arrangement is acceptable.
NOTE : The maximum duty from the system cannot exceed the maximum capacity of the outdoor
unit, it is possible to use indoor uits with a total capacity of 135% of the outdoor unit capacity.
TOSHIBA
AUGUST 1997 Page 5

CONSTRUCTION VIEWS
MAR-M81HTM8E-E
MAR-M101FHTM8E-E
790 mm
824 mm
375 mm
750 mm
120 mm
65 mm
650 mm
1100 mm
1290 mm
610 mm
1182 mm
98 mm
90 mm
130 mm
160 mm
135 mm
L G
TOSHIBA
AUGUST 1997 Page 6

DIMENSIONAL DRAWINGS
RBM-Y1032E-E
300 mm
15 mm
50 mm
170 mm
Slit for hanging bolt
Oval holefor
hanging bolt
90 mm
170 mm
90 mm 490 mm
50 mm
80 mm
55 mm
85 mm
90 mm
90 mm 90 mm
90 mm
Electric Parts Box
Wiring Entrance
Refrigerant piping joint (Flare)
Liquid Side Ø 9.5
Refrigerant piping joint (Flare)
Gas Side Ø 19
60 mm
Wiring Entrance Ø 36
80 mm
100 mm
125 mm
Refrigerant piping joint (Flare)
Liquid Side Ø 15.9
Refrigerant piping joint (Brazed)
Suction Gas Side Ø 28.6
Refrigerant piping joint (Flare)
Discharge Gas Side Ø 19
100 mm
or more
500 mm
or more
500 mm
or more
500 mm
or more
450 x 450
Inspection opening
Note. Make an inspection opening at
the specified place. It is indispensable
for servicing.
560 mm
15 mm
590 mm
450 mm
250 mm
205 mm
TOSHIBA
AUGUST 1997 Page 7

DIMENSIONAL DRAWINGS
RBM-Y1042E-E
370 mm
15 mm
50 mm
170 mm
Slit for hanging bolt
Oval holefor
hanging bolt
90 mm
170 mm
90 mm 490 mm
50 mm
80 mm
55 mm
85 mm
90 mm
90 mm 90 mm
90 mm
Electric Parts Box
Wiring Entrance
Refrigerant piping joint (Flare)
Liquid Side Ø 9.5
Refrigerant piping joint (Flare)
Gas Side Ø 19
60 mm Wiring Entrance Ø 36
80 mm
190 mm
125 mm
Refrigerant piping joint (Flare)
Liquid Side Ø 15.9
Refrigerant piping joint (Brazed)
Suction Gas Side Ø 28.6
Refrigerant piping joint (Flare)
Discharge Gas Side Ø 19
100 mm
or more
500 mm
or more
500 mm
or more
500 mm
or more
450 x 450
Inspection opening
Note. Make an inspection opening at
the specified place. It is indispensable
for servicing.
560 mm
90 mm
90 mm
590 mm
520 mm
250 mm
205 mm
TOSHIBA
AUGUST 1997 Page 8

4. Schematic Wiring Diagrams
Outdoor Unit
1 2 3 4 5 6 7 8 9
1 2 3 4 5 6 7 8 9
1 2 3 4 5 6 7 1 2 3 4 5 6 7
1 2 3 1 2 3 1 2 3
1 2 3
1 2 3
1 2 3 4 5 1 2 3 4 5 1 2 3 4 5 5 4 3 2 1
1
2
3
4
5
6
7
3
2
1
1
2
3
3
2
1
Pressure
Sensor
1 2 31 2 31 2 3
U V W
WVU+
-
+
-
1 2 3 4
1 2 3 4
1 2(~)
(~)
(~)
3 ℜ
Noise Filter
1 ℜ
Noise
Filter
7 8 9 10 11 12
1 2 3 4 5 6 7 8 9
1 2 3 4 5 6 7 8 9
SV1
SV2
SV3
1 2 3 4 1 2 1 2 3 4
1 2
1 2 3 4 5 6
PMV1
FM2 FM1
1 2 3
1 2
1 2 3
1 ℜ
Noise
Filter
6
5
4
3
2
1
L1 L2 L3 N
1
2
3
1
2
2
1
1
2
3
4
W
V
U
CM2
CM1
Gate Drive PCB
MCC - 1252
CN21
P01
P02
CN24 CN23 CN22 CN25
CN2
INVERTER CONTROL
PCB
MCC - 1251
CN2
CN1
CN5CN9
CN8
CN4
CD1
CN121
CN6
ThE
INTERFACE CONTROL
PCB
MCC - 1211
PJ5
P2
P1
PJ6 PJ1
WHI PJ2 BLK PJ3 BLU
ThD1 ThD2 ThS
PJ12 PJ16 PJ15 PJ7 PJ8PJ11PJ10
1 ℜ
Noise
Filter
CAPACITORS
2200λF x 2
M/C (1) M/C (2)POWER SUPPLY
50Hz 3ℜ380/415 v
Display
Switch
Display LED x 8
Diode
Clipper
Diode
Clipper
CD2
CD2
Reactor
Rectifier
Electric Starter
Contactor
52C2
Contactor
52C1
Capacitor
1λF x 3
Fuses
20A x 3
Crankcase
Heater
Inverter HP
Sw
63H1
Inverter Klixon
49C1
DOL Klixon
49C2
DOL HP Sw
63H2
Contactor
52C3
Return
Lock
Surge
Absorber
Surge
Absorber
Low Pressure
Switch 63L
RC1RC2
Tr1
Tr2
Thermal Fuse
TRS
Giant
Transistor
Smoothing Circuit
2200λF/400v x 2
47kΩ/20W x 2
1
2
3
Reversing
Valve
Fuses
2 x 7A
= 240 v ac Live (not permanent) = dc high voltage live
= Neutral (not permanent) = dc high voltage neutral
= Communication Signal = 3Ø for Inv Compressor
= Earth = dc low voltage
= L1 phase 415ac = ac low voltage
= L2 phase 415ac = ac low voltage
= L3 phase 415ac
Fuse 20A
20SF
Note :The colours used in this diagram are not
representative of those on the actual producct,
they are intended to indicate the status of each
wire.
Fan Motors
Solenoid Valves
Pulsed
Modulating
Valve
Inverter
Compressor
D.O.L.
Compressor
TOSHIBA
AUGUST 1997 Page 9

4. Schematic Wiring Diagrams
Multi Controllers
3 2 1
_
|_|
|_|
_
|_|
|_|
LD 1 LD 2
5 4 3 2 1 5 4 3 2 1 5 4 3 2 1 5 4 3 2 1 3 2 1 3 2 1 3 2 1 3 2 1 1 2 3
2
1
2
1
5
4
3
2
1
OUTDOOR
UNIT
INDOOR
UNIT D
INDOOR
UNIT C
INDOOR
UNIT B
INDOOR
UNIT A
COM
NO NC
2
1
Microswitch
1 2 3
1 2 3
1 2 3
1 2 3
1 2 3
1 2 3
1 2 3
1 2 3
1 2 3
1 2 3
Sump
Heater
Transformer
ThA ThB ThC ThD ThXPMVA PMVB PMVC PMVD
Float
Switch
PJ 10
PJ 6 PJ 7 PJ 8 PJ 9 PJ 1 PJ 2 PJ 3 PJ 4 PJ 5 PJ 16
PJ 14
PJ 13
PJ 12
Multi Controller P.C.
Board
MCC - 1210
Capacity Code
Swiches
Branch
ABranch
BBranch
CBranch
D
Display
Switch
The colours used in this
diagram are not
representative of those on
the product, they are
intended to indicate the
status of each wire.
= 240v ac Live Wiring
= Neutral Wiring
= Serial Wiring
= Earth Wiring
= ac low voltage
= ac low voltage
RBM - Y1032E - E does not have
PMVD, ThD, indoor unit D connections
or the capacity code switch for branch D.
TP 1
TP 2
TOSHIBA
AUGUST 1997 Page 10

5. Schematic Refrigeration Diagram
Outdoor Unit
DRIER
STRAINER
LIQUID
TANK
EXPANSION
VALVE
CHECK VALVE HEAT
EXCHANGER
ThE
PRESSURE
SENSOR
INVERTER
H.P. SWITCH
ThD1 INVERTER
COMPRESSOR
LOW
PRESSURE
SWITCH
ThS
D.O.L.
COMPRESSOR
ThD2
D.O.L.
H.P.SWITCH
ACCUMULATOR
PMV1
COOLING
BYPASS
4-WAY
VALVE
SV1
HIGH
PRESSURE
RELEASE
COMPRESSOR
SV4
FOR
COMP 2
START UP
SV2
FOR GAS
BALANCE
SERVICE
VALVE
SERVICE
VALVE
Specification of Outdoor Unit Components
74(W)Crankcase Heater (240vac)Energised for HeatingFour Way Valve 32.8 @ 0ºC , 10 @ 25ºC , 3.6 @ 50ºC
(k
Ω)
ThS & ThE 50 @ 25ºC , 17.9 @ 50ºC, 3.35 @ 100ºC
(k
Ω)
ThD1 & ThD2 Sensor Break on Drop : Trip 3.5 , Reset 20P.S.I.G.L.P. Switch Make on Rise : Trip 425 , Reset 340P.S.I.G.H.P. Switch DOL Break on Rise : Trip 425 , Reset 340P.S.I.G.H.P. Switch Inv. Trip 115ºC
✁
5ºC
Thermal Cut-out 6No. Poles 1.12 - 1.44Current (A) 150Consumption (W) 220 / 240 , single phase , 50Hz + NeutralPower Supply Single Phase InductionMotor Type STF-200-150CType NumberFan Motor Inv.1.49 / DOL 2.51
Coil Resistance (
Ω
)7.55.6Output (kW) 415/380 , 3-phase , 50Hz + NeutralPower Supply Three Phase InductionMotor Type HV1201CW-Y12HV991CW-Y12Type NumberCompressor MAR-M101HTM8-EMAR-M81HTM8-EModel Number
TOSHIBA
AUGUST 1997 Page 11

5. Schematic Refrigeration Diagram
Multi Controller
The schematic shows the layout for a four way multi controller (RBM-Y1042E-E), the three way
multi controller (RBM-Y1302E-E) is very similar however all components relating to branch D have
been removed.
Specification of Multi Controller Components
240 / 12Primary / Secondary (v ac)Transformer 1(Amps)Heater Fuse Trips at 119(ºC)Thermal Fuse 6550(W)Sump Heater (240vac) Break on RiseFloat Switch 32.8 @ 0ºC , 10 @ 25ºC , 3.6 @ 50ºC
(kΩ)
ThA,B,C,D,X Sensor RBM-Y1042E-ERBM-Y1032E-EModel Number
TOSHIBA
AUGUST 1997 Page 12
STRAINER
EXPANSION VALVE PMV(D)
CHECK VALVE
EXPANSION VALVE
STRAINER
PMV(C)
CHECK VALVE
EXPANSION VALVE PMV(B)
STRAINER
CHECK VALVE
STRAINER
EXPANSION VALVE PMV(A)
CHECK VALVE
ThA
ThB
ThC
ThD
ThX
LIQUID PIPE
GAS PIPE
BRANCH A
BRANCH B
BRANCH C
BRANCH D
INDOOR UNIT
STRAINER
STRAINER

6. Fault Code and Display Information
Fault Codes
Before reading the fault codes do not turn the power off as doing so will wipe the diagnostic
memory. Caution must be taken when removing the access covers as high voltages are present.
Fault diagnosis is available at three locations within the air conditioning system :-
1. Remote Controller - press the check button
2. Multi Controller - rotate the display switch to position 1
3. Outdoor Unit - see following text
Phase Rotation, DOL HP Trip, O/Load,
Comp Klixon
î
Inv HP Trip, Comp Klixon
mmm-
è
Refer To O/D21
è
Refer to O/D21
ThESensor Fault
è
Refer to O/D18
è
Refer to O/D18 High Inverter Current ac
mm-m
è
Refer to O/D1F
è
Refer to O/D1F High Inverter Current dc
m-mm
è
Refer to O/D1d
è
Refer to O/D1d Low Inverter Voltage
-mmm
è
Refer to O/D14
è
Refer to O/D14 SW01 Set to Off/Off
Low Pressure <3.5psigLED8 Suction Pipe >40ºCLED7 Discharge Pipe >130ºCLED6 Pressure Sensor FaultLED5
High Pressure - detected by pressure
sensor
LED4 ThS Sensor FaultLED3 ThD2 Sensor FaultLED2 ThD1 Sensor FaultLED1
è
Refer to O/D1C
è
Refer to O/D1C Display Switch set to “3” (if lit....)
M/C2 Sensor FaultLED8 M/C1 Sensor FaultLED7ID Codes set to Zero M/C Settings too HighLED6
ç
ID Codes too High89
è
Preheat/Defrost Flash M/C Water Level
ç
M/C Water LevelOb
ì
Refer to Multi Con15
Th(X) Sensor FaultLED5
ç
Th(X) Sensor Fault84
Th(D)Sensor FaultLED4
ç
Th(D) Sensor Fault83No Communication
Indoor to Rem Con.
99 Th(C) Sensor FaultLED3
ç
Th(C) Sensor Fault82Frost or no Change ºCO9 Th(B) Sensor FaultLED2
ç
Th(B)Sensor Fault81Reverse Change TempO8 Th(A) Sensor FaultLED1
ç
Th(A) Sensor Fault80TC SensorOd
Display Switch set to “8” (if lit....)
No Communication
Initially M/C to OD
88TA SensorOC I.D. Water LevelOb
No Communication
Indoor to Multi Con
O4
No Communication Multi
Con to Outdoor
O4
è
No Communication
Multi Con to Outdoor
O4
No Communication Inverter to Interfacesee Table 1
è
No Communication
Inverter to Interface
O4
è
No Communication
Inverter to Interface
O4
Outdoor UnitMulti Controller
Switch Position 1
Remote Controller
Press Check
-= LED Flashing m= LED On
TOSHIBA
AUGUST 1997 Page 13

6. Fault Code and Display Information
Display switch information
Multicontroller
Switch position Information
0System Communication
1Fault Codes
2Level of Demand
3Oil Retrieval, Superheat, Defrost
4Operating Mode
5Restart Timer
6Circuit Test (commissioning only)
7PMV(A) Position
8PMV(B)Position
9PMV(C) Position
10 PMV(D) Position
11 ThASensor Data (Hex Code)
12 ThB Sensor Data (Hex Code)
13 ThCSensor Data (Hex Code)
14 ThDSensor Data (Hex Code)
15 ThXSensor Data (Hex Code)
Outdoor Unit
Switch position Information
0System Communication
1Status of Compressors
2System Status (Mode, Defrost, PMV)
3Fault Diagnostics (Outdoor Unit)
4M/C1Branches A & B Indoor Capacity Codes
5M/C1Branches C & D Indoor Capacity Codes
6M/C2Branches A & B Indoor Capacity Codes
7M/C2Branches C & D Indoor Capacity Codes
8Fault Diagnostics (Multi Controller)
9Circuit Test (commissioning only)
10 Not Used
11 Not Used
12 Not Used
13 Not Used
14 Not Used
15 Not Used
TOSHIBA
AUGUST 1997 Page 14

6. Fault Code and Display Information
Multi Controller Display Switch Information
ThX15 ThD14 ThC13 ThB12 Displays Sensor Readings As A Hexadecimal Code :
40=0ºC ; 68=10ºC ; 90=20ºC ; b8=30ºC
ThA11
PMVD
10
PMVC
9
PMVB
8Displays Degree Of PMV Opening As A Hexadecimal Code :
(OO) = Closed , (FO) = Fully Open
PMVA
7Indicates Faulty Branch Connection After Circuit TestDisplays Branch Being Tested (A b C d)cct test6Normal Display (OO), Restart Timer Displays (-1) During Count DownTimer5Operating Mode :Heating (H-), Cooling (-C), Stop (--), Defrost (J-)4Displays “dF” during defrost operation
Defrost
Oil Ret
brchC
Superheat
brchC
Superheat
brchD
Oil Ret
brch D
Oil Ret
brchA
Superheat
brchA
Superheat
brchB
Oil Ret
brch B
3Level of Cooling/Heating Demand (00-1F)Demand2
For Details of Fault Codes see Page 13Fault
Codes
1
To
Outdoor
From C
Branch
To C
Branch
To D
Branch
From D
Branch
From
Outdoor
From A
Branch
To A
Branch
To B
Branch
From B
Branch
Serial0
_
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_
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_
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|__|
_
|_|
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_
|_||
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__
|_|
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_
|__|
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_
||_|
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_
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_
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|__|
_
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_
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__
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LD 2LD 1IndicatesSwitch
Pos.
The Hexadecimal codes can be interpreted using the following chart
901F41OF240FO 87.5137.9OE224EO 84.41D34.8Od208dO 81.31C31.7OC32192CO 78.21B28.6Ob28176bO 75.11A25.5OA24160AO 721922.4O9201449O 68.91819.3O8161288O 65.81716.2O7121127O 62.71613O68966O 59.61510O54805O 56.5146.9O40644O 53.4133.9O3-4483O 50.3120O2-8322O 47.2110O1161O 44.11O0OOClosedOO
HzDisplayHzDisplayºCAngle Level Of DemandTh-AbCdXPMV-Display
The above chart shows a sample of readings, other intermediate readings may be registered.
TOSHIBA
AUGUST 1997 Page 15

6. Fault Code and Display Information
Outdoor Unit Display Switch Information
The operating status of the outdoor unit and fault diagnosis can be made using both the display
selector switch (on the interface pcb) and the eight red light emitting diodes on the interface printed
circuit board.
a. Display switch set to position “0” shows communication around the system
n/aLED 8 n/aLED 7 Lit = Sending serial signal to inverter printed circuit boardLED 6 Lit = Receiving serial signal from inverter printed circuit boardLED 5 Lit = Sending serial signal to multi controller 2LED 4 Lit = Receiving serial signal from multi controller 2LED 3 Lit = Sending serial signal to multi controller 1LED 2 Lit = Receiving serial signal from multi controller 1LED 1
b. Display switch set to position “1” shows status of both compressors
OOOO122 HzSF XOOO111 HzSE OXOO103 HzSD XXOO92 HzSC OOXO84 HzSB XOXO76 HzSA OXXO69 HzS9 XXXO61 HzS8 OOOX53 HzS7 XOOX46 HzS6 OXOX42 HzS5 XXOX36 HzS4 OOXX30 HzS3 Speed Limiting
Due To Protection
Circuits i.e.
High TD or Low TS
DOL compressor
On On = Run
Off Off = Stop
XXXX0 HzS0 LED 8LED 7LED 6LED 5LED4LED 3LED 2LED 1Inverter Speed
O = Lit X = Off
c. Display switch set to position “2” shows the status of the system
TOSHIBA
AUGUST 1997 Page 16

6. Fault Code and Display Information
Outdoor Unit Display Switch Information cont.
d. Display switch set to position “3” identifies a fault condition in the outdoor unit.
Details are in the fault code chart on page 13
e. Display switch set to positions “4, 5, 6 & 7” identifies the indoor unit capacity code for each
branch.
101,253/460/461/462/463XOXO 81,003/360/361/362/363XXXO OOOX 6713/260/261/262/263XOOX 5200/202/203OXOX 4453/160/161/162/163XXOX 3132/133OOXX 2103XOXX Code NoIndoor Model NumberO = Lit X = Off Capacity code of unit on M/C 2 branch DCapacity code of unit on M/C 2 branch CPos. 7 Capacity code of unit on M/C 2 branch BCapacity code of unit on M/C 2 branch APos. 6 Capacity code of unit on M/C 1 branch DCapacity code of unit on M/C 1 branch CPos. 5 Capacity code of unit on M/C 1 branch BCapacity code of unit on M/C 1 branch APos. 4 LED 8LED 7LED 6LED 5LED4LED 3LED 2LED 1
f. Display switch set to position “8” identifies a fault condition in the multi controller.
Details are in the fault code chart on page 13
g. Display switch set to position “9” shows the status of the commissioning circuit test.
Branch DLED 8 Branch CLED 7 Branch BLED 6 Branch A
M/C 2
LED 5 Branch DLED 4 Branch CLED 3 Branch BLED 2
When an LED is lit it indicates that there is
a wiring or piping fault between the multi
controller and the relevant indoor unit.
Branch A
M/C 1
LED 1
TOSHIBA
AUGUST 1997 Page 17

7. Circuit Test Procedure
These systems have a feature which enables them to check that the wiring and piping connections are
aligned with each other. This is carried out by allowing refigerant flow to one indoor unit at a time
and monitoring that indoor unit’s coil sensor for a corresponding drop in temperature. Each indoor
unit is tested in turn and where two multi controllers are installed each multi controller is tested in
turn.
This test would normally be used at the commissioning stage.
Procedure for initialising the circuit test.
1. Turn the power off, and disconnect any T2s(optional) fitted.
2. Put the outdoor display switch to 9 and multi controller(s) display switch to 6.
3. Turn the power back on.
4. Set all the remote controllers to cool mode and 29ºC.
5. Press the on/off button to start the indoor units (fans will run).
6. Go to outdoor unit press switch J2 (above 8 x LEDs) for 3 sec .
7. The system is now self-testing (all 8 LEDs will be flashing rapidly).
8. The system will stop at the end of the test, indicated by the on/off lights flashing.
In the event of cross wiring/piping the system will indicate which units are faulty, see pages 15 & 17
TOSHIBA
AUGUST 1997 Page 18

8. Calculating The Additional Gas Charge
Main Pipes
0.19 kg/m Sub Pipes
0.125 kg/m
Branch Pipes
RAV-103 ; 0.030 kg/m
RAV-133 ; 0.030 kg/m
RAV-162 ; 0.030 kg/m
RAV-202 ; 0.030 kg/m
RAV-262 ; 0.045 kg/m
RAV-362 ; 0.045 kg/m
RAV-462 ; 0.045 kg/m
Single Multi Controller
Main pipe run (minus 3m.) x0.190 kg/m =
Branch pipe A (minus 2m.) xsee above kg/m =
Branch pipe B (minus 2m.) xsee above kg/m =
Branch pipe C (minus 2m.) xsee above kg/m =
Branch pipe D (minus 2m.) xsee above kg/m =
Total Additional Gas Charge = _________________kg
Two Multi Controllers
Main pipe run (minus 2m.) x0.190 kg/m =
Total sub pipe (minus 2m.) x0.125 kg/m =
M/C1 Branch pipe A (minus 2m.) xsee above kg/m =
Branch pipe B (minus 2m.) xsee above kg/m =
Branch pipe C (minus 2m.) xsee above kg/m =
Branch pipe D (minus 2m.) xsee above kg/m =
M/C2 Branch pipe A (minus 2m.) xsee above kg/m =
Branch pipe B (minus 2m.) xsee above kg/m =
Branch pipe C (minus 2m.) xsee above kg/m =
Branch pipe D (minus 2m.) xsee above kg/m =
Total Additional Gas Charge = _________________kg
TOSHIBA
AUGUST 1997 Page 19

SERVICE MANUAL
AIR CONDITIONER
HEAT PUMP MULTI SPLIT (2-PIPE)
Outdoor Units
MAR - M81HTM8 - E
MAR - M101HTM8 - E
Multi Controllers
RBM - Y1032E - E
RBM - Y1042E - E
TOSHIBA
AUGUST 1997 Page 1