User manual TOSHIBA MM-U080 SERVICE MANUAL
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Manual abstract: user guide TOSHIBA MM-U080SERVICE MANUAL
Detailed instructions for use are in the User's Guide.
[. . . ] A90-0132
Modular Multi System
Service Manual Air Conditioner - Multi Split Type System
HFC R407C
2
Contents
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Outline of MMS (Modular Multi System) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Parts Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] Yes
No
Cooling bypass PMV B error
Are the resistance characteristics of TD2 sensor normal ?Yes
No Replace TD2 sensor.
Is the wiring correct ?Yes
No
Set normal wiring.
(Check miswiring of the outdoor unit according to miswiring check function. )
Insufficient refrigerant, blockage, pipe breakage.
14
103
Troubleshooting
Diagnostic procedure for check code
Check code [bd] Mg-SW protective operation Operation cause 1. Mg-SW contact deposit protective operation TD sensor error Pd sensor/Ps sensor error Insufficient refrigerant, blockage in pipe.
Yes Is the Mg-SW contact faulty ?No
Turn off the power supply, and replace Mg-SW.
Are the resistance value characteristics of TD sensor normal ?Yes
No
Sensor error
Are the output voltage characteristics of Pd sensor/Ps sensor normal ?Yes
No
Sensor error
Insufficient refrigerant, blockage
14
104
Troubleshooting
Diagnostic procedure for check code
Check code [bE] Low pressure (Ps) protective operation Operation cause 1. Ps sensor error Service valve closed Indoor fan capacitor error Indoor/outdoor PMV blockage Indoor heat exchanger blockage SV2 circuit Incorrect wiring of communication cable between indoor and outdoor units
No Does the indoor fan operate ?Yes
Are the following items related to indoor fan motor normal ?Motor Yes
No Repair defective part.
Check indoor PC board. If defective, replace.
Is there a blockage on the indoor filter or heat exchanger ?No
Yes Clean or remove blockage.
Are the gas pipe and liquid pipe service valves of the outdoor unit fully open ?Yes
No Open valves fully.
Are the characteristics of low pressure sensor normal ?Yes
No
Replace low pressure sensor.
14
Is SV2 bypass circuit normal?Is SV2 bypass circuit normal ?
Is the wiring correct ?Yes
No
Set normal wiring.
(Check miswiring of the outdoor unit according to miswiring check function. )
Insufficient refrigerant, blockage, pipe breakage.
105
Troubleshooting
Diagnostic procedure for check code
Check code [d1] Master outdoor unit set-up alarm Operation cause 1. Incorrect set-up of master outdoor unit 3. Defective outdoor interface PC board
Are there multiple inverter outdoor units connected ?No
Yes
Set only one inverter outdoor unit per system.
Is set-up of the master outdoor units position duplicated ?[Set SW08 bit 2 on interface PC board of each unit. (*1)]
Yes
Set only one unit as master, turn off all power source, and then restart the operation.
No
Check interface PC board.
( *1) Set-up of outdoor unit at center position (SW08 bit 2 set-up on outdoor interface PC board) OFF: Slave/ON: Master (Automatic set-up for inverter outdoor unit).
14
106
Troubleshooting
Diagnostic procedure for check code
Check code [d2] Slave outdoor unit alarm Operation cause Defective slave outdoor unit
An error occurs in the slave outdoor unit. Confirm the check code of the slave unit, and check it according to the diagnostic procedure for each check code.
Check code [d3] TH sensor alarm
Operation cause Error of temp. sensor incorporated in IGBT (Inverter Gate Bi-Polar Transistor)
There is an error with the temp. [. . . ] SENSOR - LIQUID (TC2) SIDE PANEL ASSEMBLY (right) SIDE PANEL ASSEMBLY (left) PLATE H TRANSFORMER (MMS) TERMINAL BLOCK `ABC PQ E' TERMINAL BLOCK `E-L-N' PCB CONTROL (CM**CO2) PCB POWER (P**RC01) PRESSURE SENSOR (Service) PULSE MOTOR VALVE - COIL INFRARED RECEIVER - (AI) UNDER PANEL UNDER PANEL UNDER PANEL - (REMOTE) UNDER PANEL - (REMOTE) UPPER PANEL ASSEMBLY UPPER PANEL ASSEMBLY
S056 1 1
SR056 S080 1 1 1 1
SR080 1
1 1 2 2 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
1 3
1 3
1 2 2
3 1
3 1
2
1 1 1 1 1 1 1 1 1 1 1 1 1 1
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
1 1 1 1 1 1 1 1 1 1 1 1 1 1
1 15 4 2 1 3 1 15 4 2 1 3 1 19 4 2 1 4 1 1 1 1 1 1 2 2 5 2 2 5 3 3 5 2 1 1 1 1 1 1
1 19 4 2 1 4 1 1 1
31 32 33 34 35 36 37 38 39 40
1 3 3 5 2
41 42 43 44 44 45
1 1 1 1 1 1 1 1
20
22 22 23 23
1
45 46
1
46
166
Exploded views and service parts
Indoor units
Built-In Slim Duct MM-SB028
9
17
8 7 10
13 11 14 15 5 2 12
4 3
1 6 19 20 16
18
Ref. 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20
Description
SB028 2 2 2 2 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
43A50006 TEMPERATURE SENSOR CLIP (TC) 43A20003 MULTI-BLADE FAN 43A22005 S FAN CASE 43A22006 S FAN CASE 43A21020 FAN MOTOR (34W) 43A44063 REFRIGERATION ASSEMBLY 43A50023 TEMP. SENSOR - LIQUID TC2 43155100 MF CAPACITOR 43A58004 TRANSFORMER (MMS) 43A60010 TERMINAL `ABC PQ E' 43A60012 TERMINAL `E L N' 43A69025 PC BOARD - CONTROL (MMS) 43A69024 PC BOARD - POWER (MMS) 43A72011 DRAIN PAN 43A80009 FILTER 43A49010 PRESSURE SENSOR (Service) 43A46037 PULSE MOTOR VALVE - COIL 43A88013 OWNER'S MANUAL
20
167
Exploded views and service parts
Indoor units
2-Way Cassette MM-TU028, MM-TU042, MM-TU056
14 20 21 15 13 11/12 19
10
11/12 8 9
1
18 3 16 22 28 28 4 5
23
6 16 2 24 22 23
25 26
5
7
17
27
Ref. 01 02 03 04 05 06 07 08 09 10 12 13 14 15 43A22007 43020288 43A51002 43A70008 43020253 43071019 43A70009 43A60025 43A60012 43A69008 43155100 43A69023 43A69024 43A58007
Description BLOWER BASE ASSEMBLY CROSS FLOW FAN FLOAT SWITCH PUMP ASSEMBLY BEARING DRAIN CONNECTION DRAIN HOSE TERMINAL `ABC PQ E' TERMINAL `E L N' INTERFACE PC BOARD MF CAPACITOR PCB CONTROL (CM**CO1) PCB POWER (P**RC01) TRANSFORMER (MMS)
TU028 TU042 TU056 1 2 1 1 2 1 1 1 1 1 2 1 1 1 1 2 1 1 2 1 1 1 1 1 2 1 1 1 1 2 1 1 2 1 1 1 1 1 2 1 1 1
Ref. [. . . ]
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